Patent Id | Score | Title | Patent Type | Publication Date | Priority Date | Family Id | Search Efficiency | Original Assignee | Current Assignee |
|---|---|---|---|---|---|---|---|---|---|
| US20050288923A1 | 1.149 | Speech enhancement by noise masking | APPLICATION | 2005-12-29 | 2004-06-25 | 35507158 | Great | Hong Kong University of Science and Technology HKUST | Hong Kong University of Science and Technology HKUST |
| EP1700294A1 | 1.131 | METHOD AND DEVICE FOR SPEECH ENHANCEMENT IN THE PRESENCE OF BACKGROUND NOISE | GRANT | 2006-09-13 | 2003-12-29 | 34683070 | Great | Nokia Oyj | Nokia Oyj |
| US7873114B2 | 1.095 | Method and apparatus for quickly detecting a presence of abrupt noise and updating a noise estimate | GRANT | 2011-01-18 | 2007-03-29 | 39794304 | Great | Motorola Mobility LLC | Google Technology Holdings LLC |
| US20050256705A1 | 1.085 | Noise spectrum estimation method and apparatus | APPLICATION | 2005-11-17 | 2004-03-30 | 34567592 | Great | Waseda University, Yamaha Corp | Waseda University, Yamaha Corp |
| US7209567B1 | 1.073 | Communication system with adaptive noise suppression | GRANT | 2007-04-24 | 1998-07-09 | 37950851 | Great | Purdue Research Foundation | Purdue Research Foundation |
| US7058572B1 | 1.060 | Reducing acoustic noise in wireless and landline based telephony | GRANT | 2006-06-06 | 2000-01-28 | 36569034 | Great | Nortel Networks Ltd | Apple Inc |
| US6298322B1 | 1.054 | Encoding and synthesis of tonal audio signals using dominant sinusoids and a vector-quantized residual tonal signal | GRANT | 2001-10-02 | 1999-05-06 | 23184495 | Great | ||
| US5806031A | 1.024 | Method and recognizer for recognizing tonal acoustic sound signals | GRANT | 1998-09-08 | 1996-04-25 | 24558077 | Great | Motorola Solutions Inc | Google Technology Holdings LLC |
| US7158932B1 | 1.021 | Noise suppression apparatus | GRANT | 2007-01-02 | 1999-11-10 | 18106764 | Great | Mitsubishi Electric Corp | Mitsubishi Electric Corp |
| EP1745468B1 | 1.017 | NOISE REDUCTION FOR AUTOMATIC SPEECH RECOGNITION | GRANT | 2007-09-12 | 2004-05-14 | 34957686 | Great | Loquendo SpA | Loquendo SpA |
| US8520861B2 | 1.013 | Signal processing system for tonal noise robustness | GRANT | 2013-08-27 | 2005-05-17 | 37430870 | Great | QNX Software Systems Ltd | BlackBerry Ltd, 8758271 Canada Inc |
| EP1016073A1 | 1.012 | METHOD FOR SUPPRESSING NOISE IN A DIGITAL SPEECH SIGNAL | GRANT | 2000-07-05 | 1997-09-18 | 9511229 | Great | Matra Nortel Communications SAS | Nortel Networks France SAS, EADS Secure Networks SAS |
| EP2096629A1 | 1.009 | A CLASSING METHOD AND DEVICE FOR SOUND SIGNAL | GRANT | 2009-09-02 | 2006-12-05 | 39491665 | Great | Huawei Technologies Co Ltd | Huawei Technologies Co Ltd |
| US7359838B2 | 1.001 | Method of processing a noisy sound signal and device for implementing said method | GRANT | 2008-04-15 | 2004-09-16 | 34949870 | Great | France Telecom SA | Orange SA |
| US7428490B2 | 0.995 | Method for spectral subtraction in speech enhancement | GRANT | 2008-09-23 | 2003-09-30 | 34376639 | Great | Intel Corp | Intel Corp |
| US20040049383A1 | 0.987 | Noise removing method and device | APPLICATION | 2004-03-11 | 2000-12-28 | 18865991 | Great | NEC Corp, Hughes Electronics Corp | NEC Corp, DirecTV Group Inc |
| EP1739657B1 | 0.987 | Speech signal enhancement | GRANT | 2013-01-09 | 2005-06-28 | 37067632 | Great | QNX Software Systems Ltd | QNX Software Systems Ltd |
| US6363345B1 | 0.985 | System method and apparatus for cancelling noise | GRANT | 2002-03-26 | 1999-02-18 | 22957911 | Great | Andrea Electronics Corp | Andrea Electronics Corp |
| WO2002073592A2 | 0.983 | METHOD AND DEVICE FOR CHARACTERISING A SIGNAL AND METHOD AND DEVICE FOR PRODUCING AN INDEXED SIGNAL | APPLICATION | 2002-09-19 | 2001-02-28 | 7675809 | Great | ||
| EP1016072A1 | 0.980 | METHOD FOR SUPPRESSING NOISE IN A DIGITAL SPEECH SIGNAL | GRANT | 2000-07-05 | 1997-09-18 | 9511230 | Great | Matra Nortel Communications SAS | Nortel Networks France SAS |
| US6862567B1 | 0.979 | Noise suppression in the frequency domain by adjusting gain according to voicing parameters | GRANT | 2005-03-01 | 2000-08-30 | 34194668 | Great | Mindspeed Technologies LLC | MACOM Technology Solutions Holdings Inc, WIAV Solutions LLC |
| EP1607938A1 | 0.979 | Gain-constrained noise suppression | GRANT | 2005-12-21 | 2004-06-15 | 34940130 | Great | Microsoft Corp | Microsoft Corp |
| US7769585B2 | 0.974 | System and method of voice activity detection in noisy environments | GRANT | 2010-08-03 | 2007-04-05 | 39827721 | Great | Avidyne Corp | Avidyne Corp |
| US6233549B1 | 0.961 | Low frequency spectral enhancement system and method | GRANT | 2001-05-15 | 1998-11-23 | 22736100 | Great | Qualcomm Inc | Qualcomm Inc |
| US6122610A | 0.959 | Noise suppression for low bitrate speech coder | GRANT | 2000-09-19 | 1998-09-23 | 22572262 | Great | Verance Corp | GCOMM Corp, Verance Corp |
| EP1021805A1 | 0.959 | METHOD FOR CONDITIONING A DIGITAL SPEECH SIGNAL | GRANT | 2000-07-26 | 1997-09-18 | 9511228 | Great | Matra Nortel Communications SAS | Nortel Networks France SAS |
| EP0707763A1 | 0.956 | REDUCTION OF BACKGROUND NOISE FOR SPEECH ENHANCEMENT | GRANT | 1996-04-24 | 1993-07-07 | 22200351 | Great | PictureTel Corp | PictureTel Corp |
| WO2008067719A1 | 0.954 | SOUND ACTIVITY DETECTING METHOD AND SOUND ACTIVITY DETECTING DEVICE | APPLICATION | 2008-06-12 | 2006-12-07 | 39491655 | Great | ||
| EP1326479B2 | 0.954 | Method and apparatus for noise reduction particularly in hearing aids | GRANT | 2018-05-23 | 1997-04-16 | 21919462 | Great | Emma Mixed Signal CV | Dspfactory Ltd |
| US6453285B1 | 0.953 | Speech activity detector for use in noise reduction system and methods therefor | GRANT | 2002-09-17 | 1998-08-21 | 26793219 | Great | Polycom Inc | Polycom Inc |
| US20030078772A1 | 0.946 | Noise reduction method | APPLICATION | 2003-04-24 | 2001-09-28 | 21679392 | Great | Industrial Technology Research Institute ITRI | Industrial Technology Research Institute ITRI |
| EP1588498A1 | 0.944 | PREPROCESSING OF DIGITAL AUDIO DATA FOR IMPROVING PERCEPTUAL SOUND QUALITY ON A MOBILE PHONE | GRANT | 2005-10-26 | 2003-01-09 | 32960121 | Great | Widerthancom Co Ltd | RealNetworks Inc |
| US7092881B1 | 0.944 | Parametric speech codec for representing synthetic speech in the presence of background noise | GRANT | 2006-08-15 | 1999-07-26 | 36781871 | Great | Nokia of America Corp | Nokia of America Corp |
| US5012519A | 0.944 | Noise reduction system | GRANT | 1991-04-30 | 1987-12-25 | 11058423 | Great | DSP Group Inc | DSP Group Inc |
| EP1016071A1 | 0.934 | METHOD FOR DETECTING SPEECH ACTIVITY | GRANT | 2000-07-05 | 1997-09-18 | 9511227 | Great | Matra Nortel Communications SAS | EADS Secure Networks SAS, Nortel Networks France SAS |
| EP0784311A1 | 0.930 | Method and device for voice activity detection and a communication device | GRANT | 1997-07-16 | 1995-12-12 | 8544524 | Great | Nokia Mobile Phones Ltd | Nokia Oyj |
| US20020002455A1 | 0.929 | CORE ESTIMATOR AND ADAPTIVE GAINS FROM SIGNAL TO NOISE RATIO IN A HYBRID SPEECH ENHANCEMENT SYSTEM | APPLICATION | 2002-01-03 | 1998-01-09 | 26751777 | Great | AT&T Corp | AT&T Corp |
| US6453289B1 | 0.927 | Method of noise reduction for speech codecs | GRANT | 2002-09-17 | 1998-07-24 | 26788411 | Great | Hughes Electronics Corp | JPMorgan Chase Bank NA, Hughes Network Systems LLC |
| US5742927A | 0.926 | Noise reduction apparatus using spectral subtraction or scaling and signal attenuation between formant regions | GRANT | 1998-04-21 | 1993-02-12 | 8214300 | Great | British Telecommunications PLC | British Telecommunications PLC |
| US5668927A | 0.926 | Method for reducing noise in speech signals by adaptively controlling a maximum likelihood filter for calculating speech components | GRANT | 1997-09-16 | 1994-05-13 | 14258823 | Great | Sony Corp | Sony Corp |
| US6427134B1 | 0.925 | Voice activity detector for calculating spectral irregularity measure on the basis of spectral difference measurements | GRANT | 2002-07-30 | 1996-07-03 | 8224997 | Great | British Telecommunications PLC | British Telecommunications PLC |
| US6453291B1 | 0.925 | Apparatus and method for voice activity detection in a communication system | GRANT | 2002-09-17 | 1999-02-04 | 26816659 | Great | Motorola Solutions Inc | Google Technology Holdings LLC |
| EP2064918B1 | 0.924 | A HEARING AID WITH HISTOGRAM BASED SOUND ENVIRONMENT CLASSIFICATION | GRANT | 2014-11-05 | 2006-09-05 | 38556412 | Great | GN Hearing AS | GN Hearing AS |
| EP1769492A1 | 0.922 | COMFORT NOISE GENERATOR USING MODIFIED DOBLINGER NOISE ESTIMATE | GRANT | 2007-04-04 | 2004-06-15 | 35461616 | Great | Acoustic Technologies Inc | Acoustic Technologies Inc |
| US6351731B1 | 0.922 | Adaptive filter featuring spectral gain smoothing and variable noise multiplier for noise reduction and method therefor | GRANT | 2002-02-26 | 1998-08-21 | 26793218 | Great | Polycom Inc | Polycom Inc |
| US20040133424A1 | 0.919 | Processing speech signals | APPLICATION | 2004-07-08 | 2001-04-24 | 9913383 | Great | Motorola Solutions Inc | Motorola Solutions Inc |
| US20040078199A1 | 0.919 | Method for auditory based noise reduction and an apparatus for auditory based noise reduction | APPLICATION | 2004-04-22 | 2002-08-20 | 32092293 | Great | Emblaze Systems Ltd | Emblaze VCON Ltd |
| EP1745469A2 | 0.916 | NOISE SUPPRESSION BASED ON BARK BAND WEINER FILTERING AND MODIFIED DOBLINGER NOISE ESTIMATE | GRANT | 2007-01-24 | 2004-04-23 | 35137588 | Great | Acoustic Technologies Inc | Acoustic Technologies Inc |
| US6289309B1 | 0.916 | Noise spectrum tracking for speech enhancement | GRANT | 2001-09-11 | 1998-12-16 | 26810200 | Great | Sarnoff Corp | Google LLC |
| EP1416473A2 | 0.912 | Noise suppression device | GRANT | 2004-05-06 | 1999-06-09 | 15750659 | Great | Mitsubishi Electric Corp | Mitsubishi Electric Corp |
| US5706394A | 0.909 | Telecommunications speech signal improvement by reduction of residual noise | GRANT | 1998-01-06 | 1993-11-30 | 22578366 | Great | AT&T Corp | AT&T Corp |
| US4628529A | 0.908 | Noise suppression system | GRANT | 1986-12-09 | 1985-07-01 | 25019783 | Great | Motorola Solutions Inc | Motorola Solutions Inc |
| US7065486B1 | 0.905 | Linear prediction based noise suppression | GRANT | 2006-06-20 | 2002-04-11 | 36586518 | Great | Mindspeed Technologies LLC | MACOM Technology Solutions Holdings Inc, WIAV Solutions LLC |
| US6415253B1 | 0.902 | Method and apparatus for enhancing noise-corrupted speech | GRANT | 2002-07-02 | 1998-02-20 | 26756855 | Great | Meta C Corp | META-C Corp, Meta C Corp |
| US7680653B2 | 0.900 | Background noise reduction in sinusoidal based speech coding systems | GRANT | 2010-03-16 | 2000-02-11 | 22665558 | Great | Comsat Corp | Comsat Corp |
| US7366658B2 | 0.896 | Noise pre-processor for enhanced variable rate speech codec | GRANT | 2008-04-29 | 2005-12-09 | 38140532 | Great | Texas Instruments Inc | Texas Instruments Inc |
| US6778954B1 | 0.893 | Speech enhancement method | GRANT | 2004-08-17 | 1999-08-28 | 19609096 | Great | Samsung Electronics Co Ltd | Samsung Electronics Co Ltd |
| EP1521238A1 | 0.892 | Voice activity detection | GRANT | 2005-04-06 | 2003-09-30 | 34311436 | Great | STMicroelectronics Asia Pacific Pte Ltd | STMicroelectronics Asia Pacific Pte Ltd |
| US7054808B2 | 0.892 | Noise suppressing apparatus and noise suppressing method | GRANT | 2006-05-30 | 2000-08-31 | 18751646 | Great | Panasonic Corp | Panasonic Corp |
| EP1232496A1 | 0.891 | NOISE SUPPRESSION | GRANT | 2002-08-21 | 1999-11-15 | 8555598 | Great | Nokia Oyj | Nokia Oyj |
| EP1509903A1 | 0.887 | METHOD AND DEVICE FOR EFFICIENT FRAME ERASURE CONCEALMENT IN LINEAR PREDICTIVE BASED SPEECH CODECS | GRANT | 2005-03-02 | 2002-05-31 | 29589088 | Great | VoiceAge Corp | VoiceAge Corp |
| WO2001041334A1 | 0.886 | METHOD AND APPARATUS FOR SUPPRESSING ACOUSTIC BACKGROUND NOISE IN A COMMUNICATION SYSTEM | APPLICATION | 2001-06-07 | 1999-12-03 | 26864619 | Great | ||
| US5749067A | 0.882 | Voice activity detector | GRANT | 1998-05-05 | 1993-09-14 | 27235491 | Great | British Telecommunications PLC | LG Electronics Inc |
| US4811404A | 0.870 | Noise suppression system | GRANT | 1989-03-07 | 1987-10-01 | 22297382 | Great | Motorola Solutions Inc | Motorola Solutions Inc |
| EP0979506A1 | 0.870 | APPARATUS AND METHOD FOR RATE DETERMINATION IN A COMMUNICATION SYSTEM | GRANT | 2000-02-16 | 1997-02-26 | 25195196 | Great | Motorola Solutions Inc | Motorola Solutions Inc |
| US20020128830A1 | 0.866 | Method and apparatus for suppressing noise components contained in speech signal | APPLICATION | 2002-09-12 | 2001-01-25 | 18883330 | Great | Toshiba Corp | Toshiba Corp |
| US5963899A | 0.864 | Method and system for region based filtering of speech | GRANT | 1999-10-05 | 1996-08-07 | 24789747 | Great | US West Inc, MediaOne Group Inc | Qwest Communications International Inc |
| EP1787285A1 | 0.859 | DETECTION OF VOICE ACTIVITY IN AN AUDIO SIGNAL | GRANT | 2007-05-23 | 2004-08-30 | 32922176 | Great | Nokia Oyj | Nokia Solutions and Networks Oy |
| US7778825B2 | 0.857 | Method and apparatus for extracting voiced/unvoiced classification information using harmonic component of voice signal | GRANT | 2010-08-17 | 2005-08-01 | 36932557 | Great | Samsung Electronics Co Ltd | Samsung Electronics Co Ltd |
| US5907624A | 0.846 | Noise canceler capable of switching noise canceling characteristics | GRANT | 1999-05-25 | 1996-06-14 | 15578570 | Great | Oki Electric Industry Co Ltd | Inphi Corp |
| US5864794A | 0.844 | Signal encoding and decoding system using auditory parameters and bark spectrum | GRANT | 1999-01-26 | 1994-03-18 | 12832009 | Great | Mitsubishi Electric Corp | Mitsubishi Electric Corp |
| US6205421B1 | 0.842 | Speech coding apparatus linear prediction coefficient analyzing apparatus and noise reducing apparatus | GRANT | 2001-03-20 | 1994-12-19 | 27474829 | Great | Panasonic Corp | Panasonic Intellectual Property Corp |
| EP2063418A1 | 0.841 | AUDIO ENCODING DEVICE AND AUDIO ENCODING METHOD | GRANT | 2009-05-27 | 2006-09-15 | 39183880 | Great | Panasonic Corp | III Holdings 12 LLC |
| EP0645769A2 | 0.837 | Signal encoding or decoding apparatus and recording medium | GRANT | 1995-03-29 | 1993-09-28 | 17070550 | Great | Sony Corp | Sony Corp |
| US6889187B2 | 0.836 | Method and apparatus for improved voice activity detection in a packet voice network | GRANT | 2005-05-03 | 2000-12-28 | 26699973 | Great | Nortel Networks Ltd | RPX Clearinghouse LLC |
| US6424942B1 | 0.835 | Methods and arrangements in a telecommunications system | GRANT | 2002-07-23 | 1998-10-26 | 20413118 | Great | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US6366880B1 | 0.834 | Method and apparatus for suppressing acoustic background noise in a communication system by equaliztion of pre-and post-comb-filtered subband spectral energies | GRANT | 2002-04-02 | 1999-11-30 | 23790703 | Great | Motorola Solutions Inc | Google Technology Holdings LLC |
| EP1918910A1 | 0.832 | Model-based enhancement of speech signals | GRANT | 2008-05-07 | 2006-10-31 | 37663159 | Great | Harman Becker Automotive Systems GmbH | Harman Becker Automotive Systems GmbH |
| US8275609B2 | 0.831 | Voice activity detection | GRANT | 2012-09-25 | 2007-06-07 | 40093178 | Great | Huawei Technologies Co Ltd | Huawei Technologies Co Ltd |
| EP1554717B1 | 0.827 | PREPROCESSING OF DIGITAL AUDIO DATA FOR MOBILE AUDIO CODECS | GRANT | 2011-08-24 | 2002-10-14 | 32105578 | Great | RealNetworks Asia Pacific Co Ltd | RealNetworks Inc |
| EP1454315A2 | 0.819 | SIGNAL MODIFICATION METHOD FOR EFFICIENT CODING OF SPEECH SIGNALS | GRANT | 2004-09-08 | 2001-12-14 | 4170862 | Great | VoiceAge Corp | Nokia Oyj |
| US6519559B1 | 0.819 | Apparatus and method for the enhancement of signals | GRANT | 2003-02-11 | 1999-07-29 | 23430395 | Great | Intel Corp | Intel Corp |
| US5659622A | 0.819 | Method and apparatus for suppressing noise in a communication system | GRANT | 1997-08-19 | 1995-11-13 | 24221022 | Great | Motorola Solutions Inc | Google Technology Holdings LLC |
| US6766292B1 | 0.818 | Relative noise ratio weighting techniques for adaptive noise cancellation | GRANT | 2004-07-20 | 2000-03-28 | 24136011 | Great | Tellabs Operations Inc | Coriant Operations Inc |
| US6993481B2 | 0.817 | Detection of speech activity using feature model adaptation | GRANT | 2006-01-31 | 2000-12-04 | 26676321 | Great | Global IP Sound AB | Global IP Solutions GIPS AB, Google LLC |
| EP0722165A2 | 0.813 | Estimation of excitation parameters | GRANT | 1996-07-17 | 1995-01-12 | 23465238 | Great | Digital Voice Systems Inc | Digital Voice Systems Inc |
| US5752226A | 0.811 | Method and apparatus for reducing noise in speech signal | GRANT | 1998-05-12 | 1995-02-17 | 12273430 | Great | Sony Corp | Sony Corp |
| US5680130A | 0.811 | Information encoding method and apparatus information decoding method and apparatus information transmission method and information recording medium | GRANT | 1997-10-21 | 1994-04-01 | 26405956 | Great | Sony Corp | Sony Corp |
| US6529868B1 | 0.808 | Communication system noise cancellation power signal calculation techniques | GRANT | 2003-03-04 | 2000-03-28 | 24140548 | Great | Tellabs Operations Inc | Coriant Operations Inc |
| EP1587061B1 | 0.808 | Pitch detection of speech signals | GRANT | 2008-07-30 | 2003-09-26 | 34709491 | Great | STMicroelectronics Asia Pacific Pte Ltd | STMicroelectronics Asia Pacific Pte Ltd |
| US6523003B1 | 0.807 | Spectrally interdependent gain adjustment techniques | GRANT | 2003-02-18 | 2000-03-28 | 24139590 | Great | Tellabs Operations Inc | Coriant Operations Inc |
| US5943429A | 0.805 | Spectral subtraction noise suppression method | GRANT | 1999-08-24 | 1995-01-30 | 20397011 | Great | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US6496797B1 | 0.804 | Apparatus and method of speech coding and decoding using multiple frames | GRANT | 2002-12-17 | 1999-04-01 | 23086698 | Great | LG Electronics Inc | LG Electronics Inc |
| EP2160733A1 | 0.802 | DEVICE AND METHOD FOR NOISE SHAPING IN A MULTILAYER EMBEDDED CODEC INTEROPERABLE WITH THE ITU-T G.711 STANDARD | GRANT | 2010-03-10 | 2007-06-14 | 40129163 | Great | VoiceAge Corp | VoiceAge Corp |
| EP1540645A2 | 0.801 | DISTRIBUTED SPEECH RECOGNITION WITH BACK-END VOICE ACTIVITY DETECTION APPARATUS AND METHOD | GRANT | 2005-06-15 | 2002-08-09 | 31494940 | Great | Motorola Solutions Inc | Motorola Solutions Inc |
| US20030023430A1 | 0.801 | Speech processing device and speech processing method | APPLICATION | 2003-01-30 | 2000-08-31 | 26599014 | Great | Panasonic Corp | III Holdings 12 LLC |
| US8442817B2 | 0.801 | Apparatus and method for voice activity detection | GRANT | 2013-05-14 | 2003-12-25 | 34545038 | Great | NTT Docomo Inc | NTT Docomo Inc |
| US5802109A | 0.798 | Speech encoding communication system | GRANT | 1998-09-01 | 1996-03-28 | 24496995 | Great | NEC Corp | NEC Corp |
| US6963833B1 | 0.797 | Modifications in the multi-band excitation (MBE) model for generating high quality speech at low bit rates | GRANT | 2005-11-08 | 1999-10-26 | 35207093 | Great | Sasken Communication Technologies Ltd | Sasken Communication Technologies Ltd, Nytell Software LLC |
| EP1252621A1 | 0.796 | SYSTEM AND METHOD FOR MODIFYING SPEECH SIGNALS | GRANT | 2002-10-30 | 2000-01-28 | 26874591 | Great | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US5809455A | 0.794 | Method and device for discriminating voiced and unvoiced sounds | GRANT | 1998-09-15 | 1992-04-15 | 26333922 | Great | Sony Corp | Sony Corp |
| US20040002856A1 | 0.793 | Multi-rate frequency domain interpolative speech CODEC system | APPLICATION | 2004-01-01 | 2002-03-08 | 29782470 | Great | Hughes Electronics Corp | Hughes Network Systems LLC |
| US6704705B1 | 0.793 | Perceptual audio coding | GRANT | 2004-03-09 | 1998-09-04 | 32471057 | Great | Nortel Networks Ltd | McGill University, Microsoft Technology Licensing LLC |
| US20050171769A1 | 0.792 | Apparatus and method for voice activity detection | APPLICATION | 2005-08-04 | 2004-01-28 | 34805593 | Great | NTT Docomo Inc | NTT Docomo Inc |
| US5812970A | 0.792 | Method based on pitch-strength for reducing noise in predetermined subbands of a speech signal | GRANT | 1998-09-22 | 1995-06-30 | 16215275 | Great | Sony Corp | Sony Corp |
| US7013269B1 | 0.792 | Voicing measure for a speech CODEC system | GRANT | 2006-03-14 | 2001-02-13 | 35998890 | Great | Hughes Electronics Corp | JPMorgan Chase Bank NA, Hughes Network Systems LLC |
| US7889874B1 | 0.792 | Noise suppressor | GRANT | 2011-02-15 | 1999-11-15 | 8555599 | Great | Nokia Oyj | Nokia Mobile Phones Ltd, WSOU Investments LLC |
| US5845244A | 0.785 | Adapting noise masking level in analysis-by-synthesis employing perceptual weighting | GRANT | 1998-12-01 | 1995-05-17 | 9479077 | Great | France Telecom SA | Orange SA |
| US20040064314A1 | 0.784 | Methods and apparatus for speech end-point detection | APPLICATION | 2004-04-01 | 2002-09-27 | 32029438 | Great | Panasonic Corp | Panasonic Corp |
| US6671667B1 | 0.782 | Speech presence measurement detection techniques | GRANT | 2003-12-30 | 2000-03-28 | 24139098 | Great | Tellabs Operations Inc | Coriant Operations Inc |
| EP1958187B1 | 0.782 | METHOD AND APPARATUS FOR DETECTION OF TONAL COMPONENTS OF AUDIO SIGNALS | GRANT | 2010-07-21 | 2005-12-05 | 38610000 | Great | Qualcomm Inc | Qualcomm Inc |
| US8271270B2 | 0.779 | Method apparatus and system for encoding and decoding broadband voice signal | GRANT | 2012-09-18 | 2006-11-28 | 39147993 | Great | Samsung Electronics Co Ltd, Chungbuk National University Industry-Academic Cooperation Fdn | Samsung Electronics Co Ltd, Chungbuk National University Industry-Academic Cooperation Fdn |
| US6424938B1 | 0.778 | Complex signal activity detection for improved speech/noise classification of an audio signal | GRANT | 2002-07-23 | 1998-11-23 | 26807081 | Great | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US8280730B2 | 0.777 | Method and apparatus of increasing speech intelligibility in noisy environments | GRANT | 2012-10-02 | 2005-05-25 | 37464149 | Great | Motorola Mobility LLC | Google Technology Holdings LLC |
| US6188981B1 | 0.777 | Method and apparatus for detecting voice activity in a speech signal | GRANT | 2001-02-13 | 1998-09-18 | 22559485 | Great | Lakestar Semi Inc | HTC Corp, WIAV Solutions LLC |
| US5712953A | 0.774 | System and method for classification of audio or audio/video signals based on musical content | GRANT | 1998-01-27 | 1995-06-28 | 24023067 | Great | Electronic Data Systems LLC | Hewlett Packard Development Co LP |
| EP0867862A2 | 0.773 | Coding and decoding system for speech and musical sound | GRANT | 1998-09-30 | 1997-03-26 | 13492588 | Great | NEC Corp | NEC Corp |
| US5706395A | 0.772 | Adaptive weiner filtering using a dynamic suppression factor | GRANT | 1998-01-06 | 1995-04-19 | 23685267 | Great | Texas Instruments Inc | Texas Instruments Inc |
| US6694293B2 | 0.770 | Speech coding system with a music classifier | GRANT | 2004-02-17 | 2001-02-13 | 25127476 | Great | Mindspeed Technologies LLC | MACOM Technology Solutions Holdings Inc |
| US6931373B1 | 0.770 | Prototype waveform phase modeling for a frequency domain interpolative speech codec system | GRANT | 2005-08-16 | 2001-02-13 | 34831089 | Great | Hughes Electronics Corp | JPMorgan Chase Bank NA, Hughes Network Systems LLC |
| US6453287B1 | 0.770 | Apparatus and quality enhancement algorithm for mixed excitation linear predictive (MELP) and other speech coders | GRANT | 2002-09-17 | 1999-02-04 | 26816592 | Great | Georgia Tech Research Corp | Georgia Tech Research Corp |
| US6996523B1 | 0.769 | Prototype waveform magnitude quantization for a frequency domain interpolative speech codec system | GRANT | 2006-02-07 | 2001-02-13 | 35734335 | Great | Hughes Electronics Corp | JPMorgan Chase Bank NA, Hughes Network Systems LLC |
| US6253171B1 | 0.768 | Method of determining the voicing probability of speech signals | GRANT | 2001-06-26 | 1999-02-23 | 22967555 | Great | Comsat Corp | Comsat Corp |
| EP1316087A1 | 0.768 | TRANSMISSION ERROR CONCEALMENT IN AN AUDIO SIGNAL | GRANT | 2003-06-04 | 2000-09-05 | 8853973 | Great | France Telecom SA | Orange SA |
| US5696873A | 0.767 | Vocoder system and method for performing pitch estimation using an adaptive correlation sample window | GRANT | 1997-12-09 | 1996-03-18 | 24487269 | Great | Advanced Micro Devices Inc | Samsung Electronics Co Ltd |
| US9613631B2 | 0.767 | Noise suppression system method and program | GRANT | 2017-04-04 | 2005-07-27 | 37674255 | Great | NEC Corp | NEC Corp |
| US6097820A | 0.767 | System and method for suppressing noise in digitally represented voice signals | GRANT | 2000-08-01 | 1996-12-23 | 25094925 | Great | Nokia of America Corp | Nokia of America Corp |
| EP1550108A2 | 0.766 | METHODS AND DEVICES FOR SOURCE CONTROLLED VARIABLE BIT-RATE WIDEBAND SPEECH CODING | GRANT | 2005-07-06 | 2002-10-11 | 32094059 | Great | Nokia Oyj | Nokia Oyj |
| US20040181393A1 | 0.766 | Tonal analysis for perceptual audio coding using a compressed spectral representation | APPLICATION | 2004-09-16 | 2003-03-14 | 32962178 | Great | Agere Systems LLC | MUCH SHELIST FREED DENENBERG ARNENT & RUBENSTEIN PC, Avago Technologies International Sales Pte Ltd |
| EP1388147B1 | 0.764 | METHOD FOR ENLARGING THE BAND WIDTH OF A NARROW-BAND FILTERED VOICE SIGNAL ESPECIALLY A VOICE SIGNAL EMITTED BY A TELECOMMUNICATION APPLIANCE | GRANT | 2004-12-29 | 2001-05-11 | 5648243 | Great | Siemens AG | Siemens AG |
| US6038532A | 0.764 | Signal processing device for cancelling noise in a signal | GRANT | 2000-03-14 | 1990-01-18 | 27454980 | Great | Panasonic Corp | Panasonic Corp |
| US7657427B2 | 0.764 | Methods and devices for source controlled variable bit-rate wideband speech coding | GRANT | 2010-02-02 | 2002-10-11 | 34829746 | Great | Nokia Oyj | Nokia Technologies Oy |
| EP1420390A1 | 0.764 | Interoperable vocoder | GRANT | 2004-05-19 | 2002-11-13 | 32176158 | Great | Digital Voice Systems Inc | Digital Voice Systems Inc |
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| US20100017204A1 | 0.660 | ENCODING DEVICE AND ENCODING METHOD | APPLICATION | 2010-01-21 | 2007-03-02 | 39808027 | Good | Panasonic Corp | Panasonic Intellectual Property Corp |
| US6718302B1 | 0.660 | Method for utilizing validity constraints in a speech endpoint detector | GRANT | 2004-04-06 | 1997-10-20 | 26857247 | Good | Sony Corp, Sony Electronics Inc | Sony Corp, Sony Electronics Inc |
| US7813931B2 | 0.660 | System for improving speech quality and intelligibility with bandwidth compression/expansion | GRANT | 2010-10-12 | 2005-04-20 | 37114660 | Good | QNX Software Systems Co | BlackBerry Ltd, 8758271 Canada Inc |
| US7983904B2 | 0.659 | Scalable decoding apparatus and scalable encoding apparatus | GRANT | 2011-07-19 | 2004-11-05 | 36319210 | Good | Panasonic Corp | III Holdings 12 LLC |
| US5699477A | 0.659 | Mixed excitation linear prediction with fractional pitch | GRANT | 1997-12-16 | 1994-11-09 | 23316797 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US6564182B1 | 0.657 | Look-ahead pitch determination | GRANT | 2003-05-13 | 2000-05-12 | 24275292 | Good | Lakestar Semi Inc | MACOM Technology Solutions Holdings Inc, WIAV Solutions LLC |
| US6018706A | 0.657 | Pitch determiner for a speech analyzer | GRANT | 2000-01-25 | 1996-01-26 | 24368828 | Good | Motorola Solutions Inc | Google Technology Holdings LLC |
| US5754974A | 0.657 | Spectral magnitude representation for multi-band excitation speech coders | GRANT | 1998-05-19 | 1995-02-22 | 23549623 | Good | Digital Voice Systems Inc | Digital Voice Systems Inc |
| EP1301891A2 | 0.657 | A SPEECH COMMUNICATION SYSTEM AND METHOD FOR HANDLING LOST FRAMES | GRANT | 2003-04-16 | 2000-07-14 | 24472632 | Good | Lakestar Semi Inc | Mindspeed Technologies LLC |
| US6574593B1 | 0.657 | Codebook tables for encoding and decoding | GRANT | 2003-06-03 | 1999-09-22 | 56290057 | Good | Lakestar Semi Inc | Digimedia Tech LLC |
| US6493665B1 | 0.657 | Speech classification and parameter weighting used in codebook search | GRANT | 2002-12-10 | 1998-08-24 | 26793420 | Good | Lakestar Semi Inc | Hanger Solutions LLC |
| EP2047461A2 | 0.656 | SYSTEMS AND METHODS FOR INCLUDING AN IDENTIFIER WITH A PACKET ASSOCIATED WITH A SPEECH SIGNAL | GRANT | 2009-04-15 | 2006-07-31 | 38920744 | Good | Qualcomm Inc | Qualcomm Inc |
| US7454330B1 | 0.656 | Method and apparatus for speech encoding and decoding by sinusoidal analysis and waveform encoding with phase reproducibility | GRANT | 2008-11-18 | 1995-10-26 | 17905273 | Good | Sony Corp | Sony Corp |
| US6912496B1 | 0.655 | Preprocessing modules for quality enhancement of MBE coders and decoders for signals having transmission path characteristics | GRANT | 2005-06-28 | 1999-10-26 | 34681127 | Good | Silicon Automation Systems Ltd | Sasken Communication Technologies Ltd, Nytell Software LLC |
| US7460990B2 | 0.655 | Efficient coding of digital media spectral data using wide-sense perceptual similarity | GRANT | 2008-12-02 | 2004-01-23 | 34798916 | Good | Microsoft Corp | Microsoft Technology Licensing LLC |
| EP1232494A1 | 0.654 | GAIN-SMOOTHING IN WIDEBAND SPEECH AND AUDIO SIGNAL DECODER | GRANT | 2002-08-21 | 1999-11-18 | 4164645 | Good | VoiceAge Corp | VoiceAge Corp |
| EP2118889B1 | 0.653 | METHOD AND CONTROLLER FOR SMOOTHING STATIONARY BACKGROUND NOISE | GRANT | 2012-10-03 | 2007-03-05 | 39738503 | Good | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US6188980B1 | 0.653 | Synchronized encoder-decoder frame concealment using speech coding parameters including line spectral frequencies and filter coefficients | GRANT | 2001-02-13 | 1998-08-24 | 26793416 | Good | Lakestar Semi Inc | Samsung Electronics Co Ltd |
| US6047254A | 0.652 | System and method for determining a first formant analysis filter and prefiltering a speech signal for improved pitch estimation | GRANT | 2000-04-04 | 1996-05-15 | 46254618 | Good | Advanced Micro Devices Inc | Saxon Innovations LLC |
| US7627468B2 | 0.651 | Apparatus and method for extracting syllabic nuclei | GRANT | 2009-12-01 | 2002-05-16 | 29544947 | Good | Japan Science and Technology Agency, ATR Advanced Telecommunications Research Institute International | Japan Science and Technology Agency, ATR Advanced Telecommunications Research Institute International |
| US20070185709A1 | 0.650 | Voicing estimation method and apparatus for speech recognition by using local spectral information | APPLICATION | 2007-08-09 | 2006-02-09 | 38270513 | Good | Samsung Electronics Co Ltd | Samsung Electronics Co Ltd |
| US5434948A | 0.650 | Polyphonic coding | GRANT | 1995-07-18 | 1989-06-15 | 26295490 | Good | British Telecommunications PLC | British Telecommunications PLC |
| US6098036A | 0.647 | Speech coding system and method including spectral formant enhancer | GRANT | 2000-08-01 | 1998-07-13 | 22356667 | Good | Lockheed Martin Corp | III Holdings 1 LLC |
| US5444816A | 0.647 | Dynamic codebook for efficient speech coding based on algebraic codes | GRANT | 1995-08-22 | 1990-02-23 | 4144369 | Good | Universite de Sherbrooke | Universite de Sherbrooke |
| US6463406B1 | 0.646 | Fractional pitch method | GRANT | 2002-10-08 | 1994-03-25 | 22813371 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US7562021B2 | 0.646 | Modification of codewords in dictionary used for efficient coding of digital media spectral data | GRANT | 2009-07-14 | 2005-07-15 | 37662735 | Good | Microsoft Corp | Microsoft Technology Licensing LLC |
| US6418407B1 | 0.645 | Method and apparatus for pitch determination of a low bit rate digital voice message | GRANT | 2002-07-09 | 1999-09-30 | 23622835 | Good | Motorola Solutions Inc | Motorola Solutions Inc |
| EP1259957A1 | 0.645 | CLOSED-LOOP MULTIMODE MIXED-DOMAIN LINEAR PREDICTION SPEECH CODER | GRANT | 2002-11-27 | 2000-02-29 | 21741098 | Good | Qualcomm Inc | Qualcomm Inc |
| US6438517B1 | 0.644 | Multi-stage pitch and mixed voicing estimation for harmonic speech coders | GRANT | 2002-08-20 | 1998-05-19 | 22163979 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US6823303B1 | 0.644 | Speech encoder using voice activity detection in coding noise | GRANT | 2004-11-23 | 1998-08-24 | 26793428 | Good | Lakestar Semi Inc | MACOM Technology Solutions Holdings Inc |
| US6691092B1 | 0.644 | Voicing measure as an estimate of signal periodicity for a frequency domain interpolative speech codec system | GRANT | 2004-02-10 | 1999-04-05 | 30772455 | Good | Hughes Electronics Corp | JPMorgan Chase Bank NA, Hughes Network Systems LLC |
| US6507814B1 | 0.643 | Pitch determination using speech classification and prior pitch estimation | GRANT | 2003-01-14 | 1998-08-24 | 26793417 | Good | Lakestar Semi Inc | Samsung Electronics Co Ltd |
| US8543389B2 | 0.643 | Coding/decoding of digital audio signals | GRANT | 2013-09-24 | 2007-02-02 | 38477199 | Good | France Telecom SA | Orange SA |
| WO2003036621A1 | 0.642 | METHOD AND APPARATUS FOR ENHANCING LOUDNESS OF AN AUDIO SIGNAL | APPLICATION | 2003-05-01 | 2001-10-22 | 23347439 | Good | ||
| EP0518742A1 | 0.642 | Method for detecting a noisy wanted signal | GRANT | 1992-12-16 | 1991-06-14 | 9413874 | Good | Thales Avionics SAS | Thales Avionics SAS |
| EP1329877A2 | 0.640 | Speech synthesis and decoding | GRANT | 2003-07-23 | 2002-01-16 | 21944711 | Good | Digital Voice Systems Inc | Digital Voice Systems Inc |
| EP0932141A2 | 0.639 | Method for signal controlled switching between different audio coding schemes | GRANT | 1999-07-28 | 1998-01-22 | 22105686 | Good | Deutsche Telekom AG | Deutsche Telekom AG |
| US6067511A | 0.639 | LPC speech synthesis using harmonic excitation generator with phase modulator for voiced speech | GRANT | 2000-05-23 | 1998-07-13 | 22356651 | Good | Lockheed Martin Corp | Lockheed Martin Corp |
| US20020138268A1 | 0.639 | Speech bandwidth extension | APPLICATION | 2002-09-26 | 2001-01-12 | 26695712 | Good | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US5581654A | 0.639 | Method and apparatus for information encoding and decoding | GRANT | 1996-12-03 | 1993-05-25 | 27314581 | Good | Sony Corp | Sony Corp |
| US7580832B2 | 0.639 | Apparatus and method for robust classification of audio signals and method for establishing and operating an audio-signal database as well as computer program | GRANT | 2009-08-25 | 2004-07-26 | 35311729 | Good | m2any GmbH | m2any GmbH |
| US5701390A | 0.639 | Synthesis of MBE-based coded speech using regenerated phase information | GRANT | 1997-12-23 | 1995-02-22 | 23549243 | Good | Digital Voice Systems Inc | Digital Voice Systems Inc |
| US6324505B1 | 0.639 | Amplitude quantization scheme for low-bit-rate speech coders | GRANT | 2001-11-27 | 1999-07-19 | 23402824 | Good | Qualcomm Inc | Qualcomm Inc |
| US5651090A | 0.638 | Coding method and coder for coding input signals of plural channels using vector quantization and decoding method and decoder therefor | GRANT | 1997-07-22 | 1994-05-06 | 26435500 | Good | Nippon Telegraph and Telephone Corp | Nippon Telegraph and Telephone Corp |
| US7761290B2 | 0.638 | Flexible frequency and time partitioning in perceptual transform coding of audio | GRANT | 2010-07-20 | 2007-06-15 | 40133072 | Good | Microsoft Corp | Microsoft Technology Licensing LLC |
| US6078880A | 0.638 | Speech coding system and method including voicing cut off frequency analyzer | GRANT | 2000-06-20 | 1998-07-13 | 22356634 | Good | Lockheed Martin Corp | Lockheed Martin Corp |
| US6243672B1 | 0.637 | Speech encoding/decoding method and apparatus using a pitch reliability measure | GRANT | 2001-06-05 | 1996-09-27 | 17302125 | Good | Sony Corp | Sony Corp |
| US6456965B1 | 0.637 | Multi-stage pitch and mixed voicing estimation for harmonic speech coders | GRANT | 2002-09-24 | 1997-05-20 | 26724716 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US8738370B2 | 0.637 | Speech analyzer detecting pitch frequency speech analyzing method and speech analyzing program | GRANT | 2014-05-27 | 2005-06-09 | 37498359 | Good | AGI Inc | AGI Inc AND SHUNJI MITSUYOSHI, MITSUYOSHI SHINJI, AGI Inc |
| US6581032B1 | 0.636 | Bitstream protocol for transmission of encoded voice signals | GRANT | 2003-06-17 | 1999-09-22 | 35150877 | Good | Lakestar Semi Inc | Quarterhill Inc, Mindspeed Technologies LLC |
| EP1103955A2 | 0.635 | Multiband harmonic transform coder | GRANT | 2001-05-30 | 1999-11-29 | 23778441 | Good | Digital Voice Systems Inc | Digital Voice Systems Inc |
| US8175869B2 | 0.635 | Method apparatus and medium for classifying speech signal and method apparatus and medium for encoding speech signal using the same | GRANT | 2012-05-08 | 2005-08-11 | 37743628 | Good | Samsung Electronics Co Ltd | Samsung Electronics Co Ltd |
| US20070282599A1 | 0.633 | METHOD AND APPARATUS TO ENCODE AND/OR DECODE SIGNAL USING BANDWIDTH EXTENSION TECHNOLOGY | APPLICATION | 2007-12-06 | 2006-06-03 | 38912598 | Good | Samsung Electronics Co Ltd | Samsung Electronics Co Ltd |
| US5842160A | 0.632 | Method for improving the voice quality in low-rate dynamic bit allocation sub-band coding | GRANT | 1998-11-24 | 1992-01-15 | 25231586 | Good | Ericsson Inc | Ericsson Inc |
| US6504838B1 | 0.631 | Voice and data exchange over a packet based network with fax relay spoofing | GRANT | 2003-01-07 | 1999-09-20 | 27586443 | Good | Broadcom Corp | Avago Technologies General IP Singapore Pte Ltd |
| US6026357A | 0.631 | First formant location determination and removal from speech correlation information for pitch detection | GRANT | 2000-02-15 | 1996-05-15 | 46254615 | Good | Advanced Micro Devices Inc | RPX Corp |
| EP1214706B1 | 0.631 | MULTIMODE SPEECH ENCODER | GRANT | 2004-08-04 | 1999-09-22 | 26852220 | Good | Lakestar Semi Inc | Mindspeed Technologies LLC |
| US7272556B1 | 0.630 | Scalable and embedded codec for speech and audio signals | GRANT | 2007-09-18 | 1998-09-23 | 38481871 | Good | Nokia of America Corp | Alcatel Lucent SAS, Nokia of America Corp, Voxware Inc |
| US20030187635A1 | 0.630 | Method for modeling speech harmonic magnitudes | APPLICATION | 2003-10-02 | 2002-03-28 | 28453029 | Good | Motorola Solutions Inc | Google Technology Holdings LLC |
| US6370500B1 | 0.628 | Method and apparatus for non-speech activity reduction of a low bit rate digital voice message | GRANT | 2002-04-09 | 1999-09-30 | 23619408 | Good | Motorola Solutions Inc | Motorola Solutions Inc |
| US6604070B1 | 0.628 | System of encoding and decoding speech signals | GRANT | 2003-08-05 | 1999-09-22 | 56290058 | Good | Lakestar Semi Inc | MACOM Technology Solutions Holdings Inc |
| US5611019A | 0.628 | Method and an apparatus for speech detection for determining whether an input signal is speech or nonspeech | GRANT | 1997-03-11 | 1993-05-19 | 14700517 | Good | Panasonic Corp | Panasonic Corp |
| EP1194924A1 | 0.627 | ADAPTIVE TILT COMPENSATION FOR SYNTHESIZED SPEECH RESIDUAL | GRANT | 2002-04-10 | 1998-08-24 | 26793427 | Good | Lakestar Semi Inc | Mindspeed Technologies LLC |
| EP1224662A1 | 0.627 | VARIABLE BIT-RATE CELP CODING OF SPEECH WITH PHONETIC CLASSIFICATION | GRANT | 2002-07-24 | 1999-10-19 | 23670498 | Good | Atmel Corp | Atmel Corp |
| US6829578B1 | 0.627 | Tone features for speech recognition | GRANT | 2004-12-07 | 1999-11-11 | 8240851 | Good | Koninklijke Philips NV | Koninklijke Philips NV |
| US20050192798A1 | 0.626 | Classification of audio signals | APPLICATION | 2005-09-01 | 2004-02-23 | 31725817 | Good | Nokia Oyj | Nokia Technologies Oy |
| US7630881B2 | 0.626 | Bandwidth extension of bandlimited audio signals | GRANT | 2009-12-08 | 2004-09-17 | 34926584 | Good | Nuance Communications Inc | Nuance Communications Inc |
| US6260010B1 | 0.625 | Speech encoder using gain normalization that combines open and closed loop gains | GRANT | 2001-07-10 | 1998-08-24 | 26793425 | Good | Lakestar Semi Inc | MACOM Technology Solutions Holdings Inc |
| US7565213B2 | 0.625 | Device and method for analyzing an information signal | GRANT | 2009-07-21 | 2004-05-07 | 35450122 | Good | Gracenote Inc | Sony Corp |
| WO2007077280A1 | 0.624 | SYSTEM AND METHOD FOR THE RAPID PERCEPTUAL QUANTIFICATION AND SCALABLE CODING OF AUDIO SIGNALS | APPLICATION | 2007-07-12 | 2005-12-02 | 38227941 | Good | ||
| US20060265216A1 | 0.624 | Packet loss concealment for block-independent speech codecs | APPLICATION | 2006-11-23 | 2005-05-20 | 36088511 | Good | Broadcom Corp | Avago Technologies International Sales Pte Ltd |
| US20060251178A1 | 0.624 | Encoder apparatus and decoder apparatus | APPLICATION | 2006-11-09 | 2003-09-16 | 37394019 | Good | Panasonic Corp | Panasonic Intellectual Property Corp |
| US6292775B1 | 0.623 | Speech processing system using format analysis | GRANT | 2001-09-18 | 1996-11-18 | 10803070 | Good | UK Secretary of State for Defence | Aurix Ltd |
| US7039581B1 | 0.623 | Hybrid speed coding and system | GRANT | 2006-05-02 | 1999-09-22 | 36216191 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US7222070B1 | 0.622 | Hybrid speech coding and system | GRANT | 2007-05-22 | 1999-09-22 | 38049635 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US7505902B2 | 0.622 | Discrimination of components of audio signals based on multiscale spectro-temporal modulations | GRANT | 2009-03-17 | 2004-07-28 | 35733478 | Good | University of Maryland at Baltimore | University of Maryland at Baltimore |
| US7139700B1 | 0.621 | Hybrid speech coding and system | GRANT | 2006-11-21 | 1999-09-22 | 37423309 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US20010014857A1 | 0.621 | A VOICE ACTIVITY DETECTOR FOR PACKET VOICE NETWORK | APPLICATION | 2001-08-16 | 1998-08-14 | 22462583 | Good | Nortel Networks Ltd | Nortel Networks Ltd |
| US5596676A | 0.620 | Mode-specific method and apparatus for encoding signals containing speech | GRANT | 1997-01-21 | 1992-06-01 | 26921843 | Good | Hughes Electronics Corp | JPMorgan Chase Bank NA, Hughes Network Systems LLC |
| US6240386B1 | 0.620 | Speech codec employing noise classification for noise compensation | GRANT | 2001-05-29 | 1998-08-24 | 27536839 | Good | Lakestar Semi Inc | MACOM Technology Solutions Holdings Inc |
| US6680972B1 | 0.620 | Source coding enhancement using spectral-band replication | GRANT | 2004-01-20 | 1997-06-10 | 27355877 | Good | Coding Technologies Sweden AB | LARS GUSAF LILJERYD, Dolby International AB |
| US6094629A | 0.620 | Speech coding system and method including spectral quantizer | GRANT | 2000-07-25 | 1998-07-13 | 22356628 | Good | Lockheed Martin Corp | Lockheed Martin Corp |
| US6772126B1 | 0.619 | Method and apparatus for transferring low bit rate digital voice messages using incremental messages | GRANT | 2004-08-03 | 1999-09-30 | 32771691 | Good | Motorola Solutions Inc | Motorola Solutions Inc |
| US5646961A | 0.619 | Method for noise weighting filtering | GRANT | 1997-07-08 | 1994-12-30 | 23447544 | Good | Nokia of America Corp | Nokia of America Corp |
| EP2102619A1 | 0.619 | METHOD AND DEVICE FOR CODING TRANSITION FRAMES IN SPEECH SIGNALS | GRANT | 2009-09-23 | 2006-10-24 | 39324068 | Good | VoiceAge Corp | VoiceAge Corp |
| US6081776A | 0.619 | Speech coding system and method including adaptive finite impulse response filter | GRANT | 2000-06-27 | 1998-07-13 | 22356622 | Good | Lockheed Martin Corp | Lockheed Martin Corp |
| US6449590B1 | 0.618 | Speech encoder using warping in long term preprocessing | GRANT | 2002-09-10 | 1998-08-24 | 26793422 | Good | Lakestar Semi Inc | Samsung Electronics Co Ltd |
| US5848388A | 0.617 | Speech recognition with sequence parsing rejection and pause detection options | GRANT | 1998-12-08 | 1993-03-25 | 26134232 | Good | British Telecommunications PLC | British Telecommunications PLC |
| US8554569B2 | 0.617 | Quality improvement techniques in an audio encoder | GRANT | 2013-10-08 | 2001-12-14 | 21779728 | Good | Microsoft Corp | Microsoft Technology Licensing LLC |
| US7065485B1 | 0.617 | Enhancing speech intelligibility using variable-rate time-scale modification | GRANT | 2006-06-20 | 2002-01-09 | 36586517 | Good | AT&T Corp | Nuance Communications Inc |
| US5744742A | 0.617 | Parametric signal modeling musical synthesizer | GRANT | 1998-04-28 | 1995-11-07 | 24202905 | Good | EuPhonics Inc | HP Inc, Hewlett Packard Enterprise Development LP |
| US3649765A | 0.615 | SPEECH ANALYZER-SYNTHESIZER SYSTEM EMPLOYING IMPROVED FORMANT EXTRACTOR | GRANT | 1972-03-14 | 1969-10-29 | 25358730 | Good | Bell Telephone Laboratories Inc | AT&T Corp |
| US6611800B1 | 0.614 | Vector quantization method and speech encoding method and apparatus | GRANT | 2003-08-26 | 1996-09-24 | 17225449 | Good | Sony Corp | Sony Corp |
| US6496798B1 | 0.614 | Method and apparatus for encoding and decoding frames of voice model parameters into a low bit rate digital voice message | GRANT | 2002-12-17 | 1999-09-30 | 23619392 | Good | Motorola Solutions Inc | Motorola Solutions Inc |
| US6138092A | 0.613 | CELP speech synthesizer with epoch-adaptive harmonic generator for pitch harmonics below voicing cutoff frequency | GRANT | 2000-10-24 | 1998-07-13 | 22356644 | Good | Lockheed Martin Corp | Lockheed Martin Corp |
| US7318025B2 | 0.613 | Method for improving speech quality in speech transmission tasks | GRANT | 2008-01-08 | 2000-04-28 | 7640221 | Good | Deutsche Telekom AG | Deutsche Telekom AG |
| US6167372A | 0.613 | Signal identifying device code book changing device signal identifying method and code book changing method | GRANT | 2000-12-26 | 1997-07-09 | 16136884 | Good | Sony Corp | Sony Corp |
| US7707034B2 | 0.612 | Audio codec post-filter | GRANT | 2010-04-27 | 2005-05-31 | 37464575 | Good | Microsoft Corp | Microsoft Technology Licensing LLC |
| US6031173A | 0.611 | Apparatus for generating musical tones using impulse response signals | GRANT | 2000-02-29 | 1997-09-30 | 27573606 | Good | Kawai Musical Instrument Manufacturing Co Ltd | KAWAIMUSICAL INST MFGCO LTD, Kawai Musical Instrument Manufacturing Co Ltd |
| US8271276B1 | 0.610 | Enhancement of multichannel audio | GRANT | 2012-09-18 | 2007-02-26 | 39721787 | Good | Dolby Laboratories Licensing Corp | Dolby Laboratories Licensing Corp |
| US7584096B2 | 0.610 | Method and apparatus for encoding speech | GRANT | 2009-09-01 | 2003-11-11 | 29726320 | Good | Nokia Oyj | Gula Consulting LLC |
| US6157670A | 0.608 | Background energy estimation | GRANT | 2000-12-05 | 1999-08-10 | 23462209 | Good | Telogy Networks Inc | Telogy Networks Inc |
| US6119082A | 0.608 | Speech coding system and method including harmonic generator having an adaptive phase off-setter | GRANT | 2000-09-12 | 1998-07-13 | 22356660 | Good | Lockheed Martin Corp | Lockheed Martin Corp |
| US6507820B1 | 0.607 | Speech band sampling rate expansion | GRANT | 2003-01-14 | 1999-07-06 | 10856759 | Good | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| EP1093113A2 | 0.607 | Method and apparatus for dynamic segmentation of a low bit rate digital voice message | GRANT | 2001-04-18 | 1999-09-30 | 23623402 | Good | Motorola Solutions Inc | Motorola Solutions Inc |
| US6691082B1 | 0.607 | Method and system for sub-band hybrid coding | GRANT | 2004-02-10 | 1999-08-03 | 30772477 | Good | Nokia of America Corp | Nokia of America Corp |
| EP1105870A1 | 0.607 | SPEECH ENCODER ADAPTIVELY APPLYING PITCH PREPROCESSING WITH CONTINUOUS WARPING | GRANT | 2001-06-13 | 1998-08-24 | 26793419 | Good | Lakestar Semi Inc | Mindspeed Technologies LLC |
| US20100211385A1 | 0.607 | IMPROVED VOICE ACTIVITY DETECTOR | APPLICATION | 2010-08-19 | 2007-05-22 | 40032156 | Good | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US20050143978A1 | 0.606 | Speech detection system in an audio signal in noisy surrounding | APPLICATION | 2005-06-30 | 2001-12-05 | 8870113 | Good | France Telecom SA | Orange SA |
| US7493254B2 | 0.605 | Pitch determination method and apparatus using spectral analysis | GRANT | 2009-02-17 | 2001-08-08 | 19712998 | Good | Amusetec Co Ltd | Amusetec Co Ltd |
| US5915234A | 0.604 | Method and apparatus for CELP coding an audio signal while distinguishing speech periods and non-speech periods | GRANT | 1999-06-22 | 1995-08-23 | 16657039 | Good | Oki Electric Industry Co Ltd | Oki Electric Industry Co Ltd |
| EP0782128A1 | 0.603 | Method of analysing by linear prediction an audio frequency signal and its application to a method of coding and decoding an audio frequency signal | GRANT | 1997-07-02 | 1995-12-15 | 9485565 | Good | France Telecom SA | Orange SA |
| EP1105871A1 | 0.602 | LOW COMPLEXITY RANDOM CODEBOOK STRUCTURE | GRANT | 2001-06-13 | 1998-08-24 | 26793423 | Good | Lakestar Semi Inc | Mindspeed Technologies LLC |
| WO2000011649A1 | 0.601 | SPEECH ENCODER USING A CLASSIFIER FOR SMOOTHING NOISE CODING | APPLICATION | 2000-03-02 | 1998-08-24 | 26793418 | Good | ||
| US5414796A | 0.601 | Variable rate vocoder | GRANT | 1995-05-09 | 1991-06-11 | 24866989 | Good | Qualcomm Inc | Qualcomm Inc |
| US5781888A | 0.600 | Perceptual noise shaping in the time domain via LPC prediction in the frequency domain | GRANT | 1998-07-14 | 1996-01-16 | 24339994 | Good | Nokia of America Corp | Nokia of America Corp |
| US5752224A | 0.599 | Information encoding method and apparatus information decoding method and apparatus information transmission method and information recording medium | GRANT | 1998-05-12 | 1994-04-01 | 13270227 | Good | Sony Corp | Sony Corp |
| US6195438B1 | 0.599 | Method and apparatus for leveling and equalizing the audio output of an audio or audio-visual system | GRANT | 2001-02-27 | 1995-01-09 | 23459464 | Good | Panasonic Corp of North America | Panasonic Corp of North America |
| US5594833A | 0.598 | Rapid sound data compression in code book creation | GRANT | 1997-01-14 | 1992-05-29 | 15221817 | Good | ||
| US5781880A | 0.597 | Pitch lag estimation using frequency-domain lowpass filtering of the linear predictive coding (LPC) residual | GRANT | 1998-07-14 | 1994-11-21 | 23804758 | Good | Rockwell International Corp | ROCKWELLSCIENCE CENTER Inc, WIAV Solutions LLC |
| US8942383B2 | 0.597 | Wind suppression/replacement component for use with electronic systems | GRANT | 2015-01-27 | 2001-05-30 | 43031061 | Good | AliphCom LLC | ALIPH Inc, Jawb Acquisition LLC |
| US6311154B1 | 0.596 | Adaptive windows for analysis-by-synthesis CELP-type speech coding | GRANT | 2001-10-30 | 1998-12-30 | 22836203 | Good | Nokia Mobile Phones Ltd | Nokia Mobile Phones Ltd, Microsoft Technology Licensing LLC |
| US20030088423A1 | 0.593 | Encoding device and decoding device | APPLICATION | 2003-05-08 | 2001-11-02 | 27347778 | Good | Panasonic Corp | Panasonic Corp |
| US20020184009A1 | 0.593 | Method and apparatus for improved voicing determination in speech signals containing high levels of jitter | APPLICATION | 2002-12-05 | 2001-05-31 | 25356695 | Good | Nokia Mobile Phones Ltd | Nokia Mobile Phones Ltd |
| US20080177532A1 | 0.593 | Apparatus and methods for enhancement of speech | APPLICATION | 2008-07-24 | 2007-01-22 | 39304732 | Good | DSP Group Israel Ltd | DSP Group Israel Ltd |
| US8103516B2 | 0.591 | Subband coding apparatus and method of coding subband | GRANT | 2012-01-24 | 2005-11-30 | 38092246 | Good | Panasonic Corp | III Holdings 12 LLC |
| US20020010577A1 | 0.591 | Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal | APPLICATION | 2002-01-24 | 1998-10-22 | 27338462 | Good | Sony Corp | Sony Corp |
| US20040064312A1 | 0.590 | Method and device for encoding wideband speech allowing in particular an improvement in the quality of the voiced speech frames | APPLICATION | 2004-04-01 | 2002-07-17 | 29762638 | Good | STMicroelectronics NV | STMicroelectronics NV |
| US6415034B1 | 0.589 | Earphone unit and a terminal device | GRANT | 2002-07-02 | 1996-08-13 | 8546485 | Good | Nokia Mobile Phones Ltd | WSOU Investments LLC |
| US3740476A | 0.589 | SPEECH SIGNAL PITCH DETECTOR USING PREDICTION ERROR DATA | GRANT | 1973-06-19 | 1971-07-09 | 22580131 | Good | Bell Telephone Laboratories Inc | AT&T Corp |
| US5937375A | 0.589 | Voice-presence/absence discriminator having highly reliable lead portion detection | GRANT | 1999-08-10 | 1995-11-30 | 18033739 | Good | Denso Corp | Denso Corp |
| US5226108A | 0.589 | PROCESSING A SPEECH SIGNAL WITH ESTIMATED PITCH | GRANT | 1993-07-06 | 1990-09-20 | 24343133 | Good | Digital Voice Systems Inc | Digital Voice Systems Inc |
| US5911128A | 0.588 | Method and apparatus for performing speech frame encoding mode selection in a variable rate encoding system | GRANT | 1999-06-08 | 1994-08-05 | 23100400 | Good | ||
| US20090222261A1 | 0.587 | Apparatus and Method for Encoding and Decoding Signal | APPLICATION | 2009-09-03 | 2006-01-18 | 38287837 | Good | LG Electronics Inc | LG Electronics Inc, Industry Academic Cooperation Foundation IACF of Yonsei University |
| US5983173A | 0.584 | Envelope-invariant speech coding based on sinusoidal analysis of LPC residuals and with pitch conversion of voiced speech | GRANT | 1999-11-09 | 1996-11-19 | 17978863 | Good | Sony Corp | Sony Corp |
| US7113580B1 | 0.583 | Method and apparatus for performing conferencing services and echo suppression | GRANT | 2006-09-26 | 2004-02-17 | 37018963 | Good | Excel Switching Corp | Sangoma Us Inc |
| US4879748A | 0.583 | Parallel processing pitch detector | GRANT | 1989-11-07 | 1985-08-28 | 25089225 | Good | American Telephone and Telegraph Co Inc, AT&T Bell Laboratories Inc | Nokia Bell Labs, AT&T Corp |
| US6236725B1 | 0.581 | Echo canceler employing multiple step gains | GRANT | 2001-05-22 | 1997-06-11 | 15562307 | Good | Oki Electric Industry Co Ltd | Inphi Corp |
| US5884010A | 0.581 | Linear prediction coefficient generation during frame erasure or packet loss | GRANT | 1999-03-16 | 1994-03-14 | 22791178 | Good | Nokia of America Corp | Evonik Goldschmidt GmbH, Nokia of America Corp |
| US20020016698A1 | 0.580 | Device and method for audio frequency range expansion | APPLICATION | 2002-02-07 | 2000-06-26 | 18690316 | Good | Panasonic Corp | Panasonic Corp |
| US4933957A | 0.580 | Low bit rate voice coding method and system | GRANT | 1990-06-12 | 1988-03-08 | 8200488 | Good | International Business Machines Corp | International Business Machines Corp |
| US6757654B1 | 0.579 | Forward error correction in speech coding | GRANT | 2004-06-29 | 2000-05-11 | 24274909 | Good | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| EP0663739A1 | 0.579 | DIGITAL SIGNAL ENCODING DEVICE ITS DECODING DEVICE AND ITS RECORDING MEDIUM | GRANT | 1995-07-19 | 1993-06-30 | 16133682 | Good | Sony Corp | Sony Corp |
| US5924061A | 0.578 | Efficient decomposition in noise and periodic signal waveforms in waveform interpolation | GRANT | 1999-07-13 | 1997-03-10 | 25211691 | Good | Nokia of America Corp | Google LLC |
| US5305422A | 0.578 | Method for determining boundaries of isolated words within a speech signal | GRANT | 1994-04-19 | 1992-02-28 | 25288834 | Good | Panasonic Technologies Inc | Panasonic Corp of North America |
| US5805770A | 0.578 | Signal encoding apparatus signal decoding apparatus recording medium and signal encoding method | GRANT | 1998-09-08 | 1993-11-04 | 17552352 | Good | Sony Corp | Sony Corp |
| US4850022A | 0.577 | Speech signal processing system | GRANT | 1989-07-18 | 1984-03-21 | 26394461 | Good | Nippon Telegraph and Telephone Corp | Nippon Telegraph and Telephone Corp |
| US7043424B2 | 0.577 | Pitch mark determination using a fundamental frequency based adaptable filter | GRANT | 2006-05-09 | 2001-12-14 | 21679953 | Good | Industrial Technology Research Institute ITRI | Industrial Technology Research Institute ITRI |
| US20060171419A1 | 0.576 | Method for discontinuous transmission and accurate reproduction of background noise information | APPLICATION | 2006-08-03 | 2005-02-01 | 36553037 | Good | Qualcomm Inc | Qualcomm Inc |
| US6035271A | 0.575 | Statistical methods and apparatus for pitch extraction in speech recognition synthesis and regeneration | GRANT | 2000-03-07 | 1995-03-15 | 23601028 | Good | International Business Machines Corp | International Business Machines Corp |
| US6104992A | 0.575 | Adaptive gain reduction to produce fixed codebook target signal | GRANT | 2000-08-15 | 1998-08-24 | 26793421 | Good | Lakestar Semi Inc | Hanger Solutions LLC |
| US20030074197A1 | 0.574 | Method and system for frame erasure concealment for predictive speech coding based on extrapolation of speech waveform | APPLICATION | 2003-04-17 | 2001-08-17 | 27391707 | Good | Broadcom Corp | Avago Technologies International Sales Pte Ltd |
| US9754601B2 | 0.574 | Information signal encoding using a forward-adaptive prediction and a backwards-adaptive quantization | GRANT | 2017-09-05 | 2006-05-12 | 38080073 | Good | Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV | Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV |
| US8086449B2 | 0.573 | Vocal fry detecting apparatus | GRANT | 2011-12-27 | 2005-08-31 | 37808540 | Good | ATR Advanced Telecommunications Research Institute International | ATR Advanced Telecommunications Research Institute International |
| US6782360B1 | 0.573 | Gain quantization for a CELP speech coder | GRANT | 2004-08-24 | 1999-09-22 | 24295936 | Good | Mindspeed Technologies LLC | Digimedia Tech LLC |
| EP1905010B1 | 0.572 | Hierarchical audio encoding/decoding | GRANT | 2011-05-25 | 2005-07-13 | 36608212 | Good | France Telecom SA | Orange SA |
| EP1279167B1 | 0.572 | METHOD AND APPARATUS FOR PREDICTIVELY QUANTIZING VOICED SPEECH | GRANT | 2007-05-30 | 2000-04-24 | 24224775 | Good | Qualcomm Inc | Qualcomm Inc |
| US5548574A | 0.572 | Apparatus for high-speed recording compressed digital audio data with two dimensional blocks and its compressing parameters | GRANT | 1996-08-20 | 1993-03-09 | 12789453 | Good | Sony Corp | Sony Corp |
| US5651091A | 0.569 | Method and apparatus for low-delay CELP speech coding and decoding | GRANT | 1997-07-22 | 1991-09-10 | 25046668 | Good | Nokia of America Corp | AT&T Corp, Nokia of America Corp |
| US5640458A | 0.569 | Audio signal reproducing apparatus | GRANT | 1997-06-17 | 1989-10-25 | 17594119 | Good | Sony Corp | Ironworks Patents LLC |
| EP0653846A1 | 0.569 | APPARATUS AND METHOD FOR CODING OR DECODING SIGNALS AND RECORDING MEDIUM | GRANT | 1995-05-17 | 1993-05-31 | 15549814 | Good | Sony Corp | Sony Corp |
| US6947888B1 | 0.569 | Method and apparatus for high performance low bit-rate coding of unvoiced speech | GRANT | 2005-09-20 | 2000-10-17 | 24774477 | Good | Qualcomm Inc | Qualcomm Inc |
| US7613606B2 | 0.568 | Speech codecs | GRANT | 2009-11-03 | 2003-10-02 | 34393566 | Good | Nokia Oyj | Nokia Technologies Oy |
| EP1618557A1 | 0.564 | METHOD AND DEVICE FOR GAIN QUANTIZATION IN VARIABLE BIT RATE WIDEBAND SPEECH CODING | GRANT | 2006-01-25 | 2003-05-01 | 33418422 | Good | Nokia Oyj | Nokia Oyj |
| US6064954A | 0.564 | Digital audio signal coding | GRANT | 2000-05-16 | 1997-04-03 | 8230017 | Good | International Business Machines Corp | Cisco Technology Inc |
| US6173257B1 | 0.564 | Completed fixed codebook for speech encoder | GRANT | 2001-01-09 | 1998-08-24 | 26793426 | Good | Lakestar Semi Inc | HTC Corp, WIAV Solutions LLC |
| US9830899B1 | 0.563 | Adaptive noise cancellation | GRANT | 2017-11-28 | 2006-05-25 | 52395782 | Good | Knowles Electronics LLC | Knowles Electronics LLC |
| US20040073421A1 | 0.563 | Method and device for encoding wideband speech capable of independently controlling the short-term and long-term distortions | APPLICATION | 2004-04-15 | 2002-07-17 | 29762637 | Good | STMicroelectronics NV | STMicroelectronics NV |
| US20030220787A1 | 0.562 | Method of and apparatus for pitch period estimation | APPLICATION | 2003-11-27 | 2002-04-19 | 29254546 | Good | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US6199035B1 | 0.561 | Pitch-lag estimation in speech coding | GRANT | 2001-03-06 | 1997-05-07 | 26160386 | Good | Nokia Mobile Phones Ltd | Nokia Technologies Oy |
| US20030110029A1 | 0.561 | Noise detection and cancellation in communications systems | APPLICATION | 2003-06-12 | 2001-12-07 | 21748779 | Good | Nortel Networks Ltd | Nortel Networks Ltd |
| US6775649B1 | 0.560 | Concealment of frame erasures for speech transmission and storage system and method | GRANT | 2004-08-10 | 1999-09-01 | 32830762 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US5583962A | 0.559 | Encoder/decoder for multidimensional sound fields | GRANT | 1996-12-10 | 1991-01-08 | 27093204 | Good | Dolby Laboratories Licensing Corp | Dolby Laboratories Licensing Corp |
| US4945567A | 0.559 | Method and apparatus for speech-band signal coding | GRANT | 1990-07-31 | 1984-03-06 | 26381966 | Good | NEC Corp | NEC Corp |
| US8046214B2 | 0.559 | Low complexity decoder for complex transform coding of multi-channel sound | GRANT | 2011-10-25 | 2007-06-22 | 40137419 | Good | Microsoft Corp | Microsoft Technology Licensing LLC |
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| EP1300833A2 | 0.555 | A method of bandwidth extension for narrow-band speech | GRANT | 2003-04-09 | 2001-10-04 | 25517441 | Good | AT&T Corp | AT&T Corp |
| US8725501B2 | 0.553 | Audio decoding device and compensation frame generation method | GRANT | 2014-05-13 | 2004-07-20 | 35785187 | Good | Panasonic Corp | III Holdings 12 LLC |
| US8175877B2 | 0.553 | Method and apparatus for predicting word accuracy in automatic speech recognition systems | GRANT | 2012-05-08 | 2005-02-02 | 36282928 | Good | AT&T Intellectual Property II LP | Nuance Communications Inc |
| US7215776B1 | 0.553 | Method and apparatus for the compression and decompression of audio files using a chaotic system | GRANT | 2007-05-08 | 1999-11-09 | 38001074 | Good | University of New Hampshire | University of New Hampshire |
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| US8195451B2 | 0.550 | Apparatus and method for detecting speech and music portions of an audio signal | GRANT | 2012-06-05 | 2003-03-06 | 32958879 | Good | Sony Corp | Sony Corp |
| US5596677A | 0.550 | Methods and apparatus for coding a speech signal using variable order filtering | GRANT | 1997-01-21 | 1992-11-26 | 8536280 | Good | Nokia Mobile Phones Ltd | Nokia Mobile Phones Ltd, Nokia Networks Oy |
| US5963895A | 0.549 | Transmission system with speech encoder with improved pitch detection | GRANT | 1999-10-05 | 1995-05-10 | 8220277 | Good | US Philips Corp | US Philips Corp |
| US6208958B1 | 0.549 | Pitch determination apparatus and method using spectro-temporal autocorrelation | GRANT | 2001-03-27 | 1998-04-16 | 19536337 | Good | Samsung Electronics Co Ltd | Samsung Electronics Co Ltd |
| US5654952A | 0.549 | Digital signal encoding method and apparatus and recording medium | GRANT | 1997-08-05 | 1994-10-28 | 17411373 | Good | Sony Corp | Sony Corp |
| US5664057A | 0.548 | Fixed bit rate speech encoder/decoder | GRANT | 1997-09-02 | 1993-07-07 | 22210616 | Good | PictureTel Corp | Polycom Inc |
| US6134518A | 0.547 | Digital audio signal coding using a CELP coder and a transform coder | GRANT | 2000-10-17 | 1997-03-04 | 8230016 | Good | International Business Machines Corp | Cisco Technology Inc |
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| US8005672B2 | 0.545 | Circuit arrangement and method for detecting and improving a speech component in an audio signal | GRANT | 2011-08-23 | 2004-10-08 | 35812768 | Good | Trident Microsystems (Far East) Ltd | Entropic Communications LLC |
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| US7286982B2 | 0.543 | LPC-harmonic vocoder with superframe structure | GRANT | 2007-10-23 | 1999-09-22 | 23586142 | Good | Microsoft Corp | Microsoft Technology Licensing LLC |
| US6988064B2 | 0.543 | System and method for combined frequency-domain and time-domain pitch extraction for speech signals | GRANT | 2006-01-17 | 2003-03-31 | 32990035 | Good | International Business Machines Corp, Motorola Solutions Inc | International Business Machines Corp, Google Technology Holdings LLC |
| US5737695A | 0.542 | Method and apparatus for controlling the use of discontinuous transmission in a cellular telephone | GRANT | 1998-04-07 | 1996-12-21 | 25124278 | Good | Telefonaktiebolaget LM Ericsson AB | Telefonaktiebolaget LM Ericsson AB |
| US8775166B2 | 0.541 | Coding/decoding method system and apparatus | GRANT | 2014-07-08 | 2007-02-14 | 39689673 | Good | Huawei Technologies Co Ltd | Huawei Technologies Co Ltd |
| US7590531B2 | 0.541 | Robust decoder | GRANT | 2009-09-15 | 2005-05-31 | 37464579 | Good | Microsoft Corp | Microsoft Technology Licensing LLC |
| US7725312B2 | 0.541 | Transcoding method and system between CELP-based speech codes with externally provided status | GRANT | 2010-05-25 | 2002-01-08 | 28047009 | Good | Dilithium Networks Pty Ltd | Dilithium Networks Pty Ltd |
| US5602961A | 0.540 | Method and apparatus for speech compression using multi-mode code excited linear predictive coding | GRANT | 1997-02-11 | 1994-05-31 | 22952111 | Good | Alaris Inc, GT Technology Inc | GT TECHNOLOGY (50%) A JOINT VENTURE, XVD TECHNOLOGY HOLDINGS Ltd (IRELAND), GT Technology Inc |
| US6490556B2 | 0.540 | Audio classifier for half duplex communication | GRANT | 2002-12-03 | 1999-05-28 | 23258058 | Good | Intel Corp | Intel Corp |
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| US20020038209A1 | 0.537 | Method of converting the speech rate of a speech signal use of the method and a device adapted therefor | APPLICATION | 2002-03-28 | 2000-04-06 | 26073691 | Good | Telefonaktiebolaget LM Ericsson AB | Optis Wireless Technology LLC |
| US20060224381A1 | 0.536 | Detecting speech frames belonging to a low energy sequence | APPLICATION | 2006-10-05 | 2005-04-04 | 37071664 | Good | Nokia Oyj | Nokia Oyj |
| US7124075B2 | 0.535 | Methods and apparatus for pitch determination | GRANT | 2006-10-17 | 2001-10-26 | 26837975 | Good | ||
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| US6810377B1 | 0.534 | Lost frame recovery techniques for parametric LPC-based speech coding systems | GRANT | 2004-10-26 | 1998-06-19 | 22277389 | Good | Comsat Corp | Comsat Corp |
| US8145492B2 | 0.533 | Robot behavior control system and method and robot apparatus | GRANT | 2012-03-27 | 2004-04-07 | 35137593 | Good | Sony Corp | Sony Corp |
| US6826527B1 | 0.533 | Concealment of frame erasures and method | GRANT | 2004-11-30 | 1999-11-23 | 33455919 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US6003004A | 0.532 | Speech recognition method and system using compressed speech data | GRANT | 1999-12-14 | 1998-01-08 | 21701631 | Good | Advanced Recognition Technologies Inc | Advanced Recognition Technologies Inc |
| US5615298A | 0.532 | Excitation signal synthesis during frame erasure or packet loss | GRANT | 1997-03-25 | 1994-03-14 | 22790887 | Good | Nokia of America Corp | Nokia of America Corp |
| EP1520271A1 | 0.531 | METHOD AND DEVICE FOR EFFICIENT IN-BAND DIM-AND-BURST SIGNALING AND HALF-RATE MAX OPERATION IN VARIABLE BIT-RATE WIDEBAND SPEECH CODING FOR CDMA WIRELESS SYSTEMS | GRANT | 2005-04-06 | 2002-07-05 | 30005535 | Good | VoiceAge Corp | Nokia Oyj |
| US5867815A | 0.531 | Method and device for controlling the levels of voiced speech unvoiced speech and noise for transmission and reproduction | GRANT | 1999-02-02 | 1994-09-29 | 17330703 | Good | Yamaha Corp | Yamaha Corp |
| US5321793A | 0.531 | Low-delay audio signal coder using analysis-by-synthesis techniques | GRANT | 1994-06-14 | 1992-07-31 | 11410652 | Good | SIP Italiana per l Esercizio delle Telecommunicazioni P Soc | Telecom Italia Mobile SpA |
| EP0505645A1 | 0.531 | Public address intelligibility enhancement system | GRANT | 1992-09-30 | 1991-03-27 | 24712968 | Good | Hughes Aircraft Co | R.G.A. & ASSOCIATES LTD., Rga & Associates Ltd, Raytheon Co, DTS Inc, Rga & Associates Ltd |
| US20060122828A1 | 0.530 | Highband speech coding apparatus and method for wideband speech coding system | APPLICATION | 2006-06-08 | 2004-12-08 | 36575490 | Good | Electronics and Telecommunications Research Institute ETRI | Electronics and Telecommunications Research Institute ETRI |
| US7363219B2 | 0.530 | Hybrid speech coding and system | GRANT | 2008-04-22 | 2000-09-22 | 39356555 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US8060375B2 | 0.530 | Adapting masking thresholds for encoding a low frequency transient signal in audio data | GRANT | 2011-11-15 | 2005-04-19 | 41353705 | Good | Apple Inc | Apple Inc |
| WO2003107329A1 | 0.529 | AUDIO CODING SYSTEM USING CHARACTERISTICS OF A DECODED SIGNAL TO ADAPT SYNTHESIZED SPECTRAL COMPONENTS | APPLICATION | 2003-12-24 | 2002-06-17 | 29738991 | Good | ||
| US20050177257A1 | 0.528 | Digital signal processing method learning method apparatuses thereof and program storage medium | APPLICATION | 2005-08-11 | 2000-08-02 | 18730528 | Good | ||
| US20050065786A1 | 0.526 | Hybrid speech coding and system | APPLICATION | 2005-03-24 | 2003-09-23 | 34317690 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US8027242B2 | 0.526 | Signal coding and decoding based on spectral dynamics | GRANT | 2011-09-27 | 2005-10-21 | 37763406 | Good | Qualcomm Inc | IDIAP, Qualcomm Inc |
| US5819214A | 0.524 | Length of a processing block is rendered variable responsive to input signals | GRANT | 1998-10-06 | 1993-03-09 | 12789480 | Good | Sony Corp | Sony Corp |
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| US20050065787A1 | 0.524 | Hybrid speech coding and system | APPLICATION | 2005-03-24 | 2003-09-23 | 46301818 | Good | Texas Instruments Inc | Texas Instruments Inc |
| EP0747883A2 | 0.523 | Voiced/unvoiced classification of speech for use in speech decoding during frame erasures | GRANT | 1996-12-11 | 1995-06-07 | 23917119 | Good | AT&T Corp, AT&T IPM Corp | AT&T Corp |
| US20050203736A1 | 0.522 | Excitation vector generator speech coder and speech decoder | APPLICATION | 2005-09-15 | 1996-11-07 | 27459954 | Good | Panasonic Corp | Godo Kaisha IP Bridge 1 |
| EP1852849A1 | 0.519 | Method and apparatus for lossless encoding of a source signal using a lossy encoded data stream and a lossless extension data stream | GRANT | 2007-11-07 | 2006-05-05 | 36589352 | Good | Deutsche Thomson Brandt GmbH | Deutsche Thomson Brandt GmbH |
| US7050980B2 | 0.519 | System and method for compressed domain beat detection in audio bitstreams | GRANT | 2006-05-23 | 2001-01-24 | 25087521 | Good | Nokia Oyj | Nokia Oyj |
| US7136810B2 | 0.516 | Wideband speech coding system and method | GRANT | 2006-11-14 | 2000-05-22 | 27498601 | Good | Texas Instruments Inc | Texas Instruments Inc |
| US7672843B2 | 0.516 | Audio signature extraction and correlation | GRANT | 2010-03-02 | 1999-10-27 | 23697051 | Good | Nielsen Company US LLC | Nielsen Company US LLC |
| US5699485A | 0.515 | Pitch delay modification during frame erasures | GRANT | 1997-12-16 | 1995-06-07 | 23917124 | Good | Nokia of America Corp | BlackBerry Ltd |
| US7774200B2 | 0.515 | Method and apparatus for transmitting an encoded speech signal | GRANT | 2010-08-10 | 1993-12-14 | 22602342 | Good | InterDigital Technology Corp | InterDigital Technology Corp |
| US20100169081A1 | 0.515 | ENCODING DEVICE DECODING DEVICE AND METHOD THEREOF | APPLICATION | 2010-07-01 | 2006-12-13 | 39511687 | Good | Panasonic Corp | III Holdings 12 LLC |
| US8340213B2 | 0.515 | Signal encoding apparatus and method signal decoding apparatus and method programs and recording mediums | GRANT | 2012-12-25 | 2005-07-11 | 37609868 | Good | Sony Corp | Sony Corp |
| US4184049A | 0.515 | Transform speech signal coding with pitch controlled adaptive quantizing | GRANT | 1980-01-15 | 1978-08-25 | 25469199 | Good | Bell Telephone Laboratories Inc | AT&T Corp |
| US5179594A | 0.515 | Efficient calculation of autocorrelation coefficients for CELP vocoder adaptive codebook | GRANT | 1993-01-12 | 1991-06-12 | 24869926 | Good | Motorola Solutions Inc | General Dynamics C4 Systems Inc |
| US5327520A | 0.514 | Method of use of voice message coder/decoder | GRANT | 1994-07-05 | 1992-06-04 | 25401353 | Good | AT&T Bell Laboratories Inc | Nokia Bell Labs, AT&T Corp |
| US7483758B2 | 0.513 | Spectral translation/folding in the subband domain | GRANT | 2009-01-27 | 2000-05-23 | 20279807 | Good | Coding Technologies Sweden AB | Dolby International AB |
| US5893060A | 0.513 | Method and device for eradicating instability due to periodic signals in analysis-by-synthesis speech codecs | GRANT | 1999-04-06 | 1997-04-07 | 25679224 | Good | Universite de Sherbrooke | Universite de Sherbrooke, Nokia Mobile Phones Ltd, International Business Machines Corp |
| US6226606B1 | 0.512 | Method and apparatus for pitch tracking | GRANT | 2001-05-01 | 1998-11-24 | 22733544 | Good | Microsoft Corp | Zhigu Holdings Ltd |
| US5974379A | 0.510 | Methods and apparatus for gain controlling waveform elements ahead of an attack portion and waveform elements of a release portion | GRANT | 1999-10-26 | 1995-02-27 | 12520525 | Good | Sony Corp | Sony Corp |
| US20070055500A1 | 0.509 | Extraction and matching of characteristic fingerprints from audio signals | APPLICATION | 2007-03-08 | 2005-09-01 | 37400951 | Good | Auditude Inc | R2 Solutions LLC, Altaba Inc |
| US7369668B1 | 0.508 | Method and system for processing directed sound in an acoustic virtual environment | GRANT | 2008-05-06 | 1998-03-23 | 8551352 | Good | Nokia Oyj | Nokia Mobile Phones Ltd, Nokia Technologies Oy |
| US7523039B2 | 0.507 | Method for encoding digital audio using advanced psychoacoustic model and apparatus thereof | GRANT | 2009-04-21 | 2002-10-30 | 35581876 | Good | Samsung Electronics Co Ltd | Samsung Electronics Co Ltd |
| US20040181411A1 | 0.506 | Voicing index controls for CELP speech coding | APPLICATION | 2004-09-16 | 2003-03-15 | 33029999 | Good | Mindspeed Technologies LLC | Mindspeed Technologies LLC |
| US5987406A | 0.503 | Instability eradication for analysis-by-synthesis speech codecs | GRANT | 1999-11-16 | 1997-04-07 | 25268082 | Good | Universite de Sherbrooke | Universite de Sherbrooke |
| US20100280830A1 | 0.503 | DECODER | APPLICATION | 2010-11-04 | 2007-03-16 | 38698189 | Good | Nokia Oyj | Nokia Oyj |
| US6480820B1 | 0.503 | Method of processing auditory data | GRANT | 2002-11-12 | 1999-09-20 | 23579472 | Good | Advanced Cochlear Systems Inc | Advanced Cochlear Systems Inc |
| US7565286B2 | 0.503 | Method for recovery of lost speech data | GRANT | 2009-07-21 | 2003-07-17 | 34079386 | Good | Communications Research Centre Canada | Communications Research Centre Canada |
| US5390278A | 0.502 | Phoneme based speech recognition | GRANT | 1995-02-14 | 1991-10-08 | 25096581 | Good | Bell Canada Inc | Bell Canada Inc |
| US5583961A | 0.500 | Speaker recognition using spectral coefficients normalized with respect to unequal frequency bands | GRANT | 1996-12-10 | 1993-03-25 | 8214353 | Good | British Telecommunications PLC | British Telecommunications PLC |
| WO2001099315A2 | 0.499 | METHOD AND APPARATUS FOR THE COMPRESSION AND DECOMPRESSION OF AUDIO FILES USING A CHAOTIC SYSTEM | APPLICATION | 2001-12-27 | 2000-06-20 | 24390095 | Good | ||
| US6138089A | 0.499 | Apparatus system and method for speech compression and decompression | GRANT | 2000-10-24 | 1999-03-10 | 23012401 | Good | Infolio Inc | Open Text SA, Infolio Inc |
| US4881267A | 0.499 | Encoder of a multi-pulse type capable of optimizing the number of excitation pulses and quantization level | GRANT | 1989-11-14 | 1987-05-14 | 14737593 | Good | NEC Corp | NEC Corp |
| US7752038B2 | 0.499 | Pitch lag estimation | GRANT | 2010-07-06 | 2006-10-13 | 39276345 | Good | Nokia Oyj | Nokia Technologies Oy |
| US6128591A | 0.499 | Speech encoding system with increased frequency of determination of analysis coefficients in vicinity of transitions between voiced and unvoiced speech segments | GRANT | 2000-10-03 | 1997-07-11 | 8228544 | Good | US Philips Corp | US Philips Corp |
| US20040083110A1 | 0.499 | Packet loss recovery based on music signal classification and mixing | APPLICATION | 2004-04-29 | 2002-10-23 | 32107145 | Good | Nokia Oyj | Nokia Oyj |
| US9196261B2 | 0.497 | Voice activity detector (VAD)—based multiple-microphone acoustic noise suppression | GRANT | 2015-11-24 | 2000-07-19 | 34375865 | Good | AliphCom LLC | Jawb Acquisition LLC |
| US7243063B2 | 0.495 | Classifier-based non-linear projection for continuous speech segmentation | GRANT | 2007-07-10 | 2002-07-17 | 30442839 | Good | Mitsubishi Electric Research Laboratories Inc | Mitsubishi Electric Research Laboratories Inc |
| US6463407B2 | 0.494 | Low bit-rate coding of unvoiced segments of speech | GRANT | 2002-10-08 | 1998-11-13 | 22706272 | Good | Qualcomm Inc | Qualcomm Inc |
| US5664055A | 0.494 | CS-ACELP speech compression system with adaptive pitch prediction filter gain based on a measure of periodicity | GRANT | 1997-09-02 | 1995-06-07 | 23917151 | Good | Nokia of America Corp | BlackBerry Ltd |
| US5054072A | 0.493 | Coding of acoustic waveforms | GRANT | 1991-10-01 | 1987-04-02 | 26710548 | Good | Massachusetts Institute of Technology | Massachusetts Institute of Technology |
| US6584437B2 | 0.493 | Method and apparatus for coding successive pitch periods in speech signal | GRANT | 2003-06-24 | 2001-06-11 | 25372784 | Good | Nokia Mobile Phones Ltd | Qualcomm Inc |
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| US7890323B2 | 0.492 | Digital filtering method digital filtering equipment digital filtering program and recording medium and recorded device which are readable on computer | GRANT | 2011-02-15 | 2004-07-28 | 35786155 | Good | University of Tokushima | TOKUSHIMA THE, University of |
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| US20040184443A1 | 0.389 | Low-complexity packet loss concealment method for voice-over-IP speech transmission | APPLICATION | 2004-09-23 | 2003-03-21 | 32988303 | Good | Nokia of America Corp | WSOU Investments LLC |
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| US20090024395A1 | 0.388 | AUDIO SIGNAL ENCODING METHOD AUDIO SIGNAL DECODING METHOD TRANSMITTER RECEIVER AND WIRELESS MICROPHONE SYSTEM | APPLICATION | 2009-01-22 | 2004-01-19 | 34792293 | Good | Panasonic Corp | Panasonic Corp |
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| JPH09258795A | NR | DIGITAL FILTER AND SOUND CODING/DECODING DEVICE | GRANT | 1997-10-03 | 1996-03-25 | 14154388 | Fair | ||
| JPH08102945A | NR | HIERARCHICAL CODING DECODING DEVICE | GRANT | 1996-04-16 | 1994-09-30 | 17024116 | Fair | ||
| JPH0777979A | NR | SPEECH-OPERATED ACOUSTIC MODULATING DEVICE | GRANT | 1995-03-20 | 1993-06-30 | 15721098 | Fair | ||
| JPH07334190A | NR | DEVICE FOR QUANTIZING HIGHER HARMONIC AMPLITUDE VALUE | GRANT | 1995-12-22 | 1994-06-14 | 15068500 | Fair | ||
| JPH07114396A | NR | PITCH DETECTION | GRANT | 1995-05-02 | 1993-10-19 | 17350152 | Fair | ||
| JPH06229234A | NR | EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE | GRANT | 1994-08-16 | 1993-02-05 | 11972192 | Fair | ||
| JPH0490217A | NR | VECTOR QUANTIZATION METHOD AND VOICE CODING/DECODING DEVICE | GRANT | 1992-03-24 | 1990-08-01 | 16498534 | Fair | ||
| JPH04238416A | NR | VECTOR QUANTIZING DEVICE | GRANT | 1992-08-26 | 1991-01-23 | 11641555 | Fair | ||
| JPH04196724A | NR | VOICE ENCODER AND DECODER | GRANT | 1992-07-16 | 1990-11-27 | 18212130 | Fair | ||
| JPH03127000A | NR | SPECTRUM PREDICTING AND CODING SYSTEM FOR VOICE | GRANT | 1991-05-30 | 1989-10-13 | 17413889 | Fair | ||
| JP4570026B2 | NR | No title | GRANT | 2010-10-27 | 2004-02-25 | 35023614 | Fair | ||
| JP2007025290A | NR | DEVICE CONTROLLING REVERBERATION OF MULTICHANNEL AUDIO CODEC | APPLICATION | 2007-02-01 | 2005-07-15 | 37786142 | Fair | ||
| JP2006350373A | NR | VOICE CODE CONVERTING METHOD AND DEVICE | APPLICATION | 2006-12-28 | 2006-07-28 | 37646186 | Fair | ||
| JP2004507572A | NR | No title | APPLICATION | 2004-03-11 | 2000-07-14 | 26912854 | Fair | ||
| JP2002169579A | NR | DEVICE FOR EMBEDDING ADDITIONAL DATA IN AUDIO SIGNAL AND DEVICE FOR REPRODUCING ADDITIONAL DATA FROM AUDIO SIGNAL | APPLICATION | 2002-06-14 | 2000-12-01 | 18837857 | Fair | ||
| DE10144087B4 | NR | No title | GRANT | 2008-10-30 | 2001-09-08 | 7698190 | Fair | PROMEDIASCAN AG | PROMEDIASCAN AG, FEUSISBERG, CH |
| CN1114272C | NR | Method for allocating optimum amount of bits to MPEG audio data at high speed | GRANT | 2003-07-09 | 1994-12-30 | 19405114 | Fair | ||
| CN1099097C | NR | Method for encoding a digital audio signal | GRANT | 2003-01-15 | 1994-11-09 | 19397385 | Fair | ||
| CN101681381A | NR | Improving audio/video fingerprint search accuracy using multiple search combining | GRANT | 2010-03-24 | 2007-06-06 | 39764983 | Fair | ||
| CN101286200A | NR | Image processing apparatus and mehthod image forming apparatus and image processing system | GRANT | 2008-10-15 | 2007-04-09 | 40058398 | Fair | ||
| CN101014953A | NR | Audio fingerprinting system and method | GRANT | 2007-08-08 | 2003-09-23 | 34313617 | Fair | ||
| CN100585586C | NR | Translation system | GRANT | 2010-01-27 | 2002-08-30 | 31977350 | Fair |
 |  |
Validity Report Full Report
US8990073B2 — Method and device for sound activity detection and sound signal classification Priority Date: 2007-06-22, Publication Date: 2015-03-24, Current Assignee: VoiceAge EVS LLCReport Generated: 2021-04-01