WO2004084180A3 - Voicing index controls for celp speech coding - Google Patents

Voicing index controls for celp speech coding Download PDF

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Publication number
WO2004084180A3
WO2004084180A3 PCT/US2004/007581 US2004007581W WO2004084180A3 WO 2004084180 A3 WO2004084180 A3 WO 2004084180A3 US 2004007581 W US2004007581 W US 2004007581W WO 2004084180 A3 WO2004084180 A3 WO 2004084180A3
Authority
WO
WIPO (PCT)
Prior art keywords
speech
fixed
codebook
speech coding
voicing index
Prior art date
Application number
PCT/US2004/007581
Other languages
French (fr)
Other versions
WO2004084180A2 (en
WO2004084180B1 (en
Inventor
Yang Gao
Original Assignee
Mindspeed Tech Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mindspeed Tech Inc filed Critical Mindspeed Tech Inc
Priority to CN2004800060153A priority Critical patent/CN1757060B/en
Priority to EP04719814A priority patent/EP1604354A4/en
Publication of WO2004084180A2 publication Critical patent/WO2004084180A2/en
Publication of WO2004084180A3 publication Critical patent/WO2004084180A3/en
Publication of WO2004084180B1 publication Critical patent/WO2004084180B1/en

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/26—Pre-filtering or post-filtering
    • G10L19/265—Pre-filtering, e.g. high frequency emphasis prior to encoding
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/087—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters using mixed excitation models, e.g. MELP, MBE, split band LPC or HVXC
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/90—Pitch determination of speech signals
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L21/0232—Processing in the frequency domain

Abstract

An approach for improving quality of speech synthesized using analysis-by-synthesis (ABS ) coders is presented. An unstable perceptual quality in analysis-by-synthesis type speech coding (e.g. CELP) may occur because the periodicity degree in a voiced speech signal may vary significantly for different segments of the voiced speech. Thus the present invention uses a voicing index, which may indicate the periodicity degree of the speech signal, to control and improve ABS type speech coding. The voicing index may be used to improve the quality stability by controlling encoder and/or decoder in: fixed-codebook (301) short-term enhancement including the spectrum tilt; perceptual weighting filter; sub-fixed codebook determination; LPC interpolation (304); fixed-codebook pitch enhancement; post-pitch enhancement; noise injection into the high-frequency band at decoder; LTP sync window; signal decomposition, etc.
PCT/US2004/007581 2003-03-15 2004-03-11 Voicing index controls for celp speech coding WO2004084180A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2004800060153A CN1757060B (en) 2003-03-15 2004-03-11 Voicing index controls for CELP speech coding
EP04719814A EP1604354A4 (en) 2003-03-15 2004-03-11 Voicing index controls for celp speech coding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45543503P 2003-03-15 2003-03-15
US60/455,435 2003-03-15

Publications (3)

Publication Number Publication Date
WO2004084180A2 WO2004084180A2 (en) 2004-09-30
WO2004084180A3 true WO2004084180A3 (en) 2004-12-23
WO2004084180B1 WO2004084180B1 (en) 2005-01-27

Family

ID=33029999

Family Applications (5)

Application Number Title Priority Date Filing Date
PCT/US2004/007581 WO2004084180A2 (en) 2003-03-15 2004-03-11 Voicing index controls for celp speech coding
PCT/US2004/007583 WO2004084181A2 (en) 2003-03-15 2004-03-11 Simple noise suppression model
PCT/US2004/007580 WO2004084179A2 (en) 2003-03-15 2004-03-11 Adaptive correlation window for open-loop pitch
PCT/US2004/007582 WO2004084182A1 (en) 2003-03-15 2004-03-11 Decomposition of voiced speech for celp speech coding
PCT/US2004/007949 WO2004084467A2 (en) 2003-03-15 2004-03-11 Recovering an erased voice frame with time warping

Family Applications After (4)

Application Number Title Priority Date Filing Date
PCT/US2004/007583 WO2004084181A2 (en) 2003-03-15 2004-03-11 Simple noise suppression model
PCT/US2004/007580 WO2004084179A2 (en) 2003-03-15 2004-03-11 Adaptive correlation window for open-loop pitch
PCT/US2004/007582 WO2004084182A1 (en) 2003-03-15 2004-03-11 Decomposition of voiced speech for celp speech coding
PCT/US2004/007949 WO2004084467A2 (en) 2003-03-15 2004-03-11 Recovering an erased voice frame with time warping

Country Status (4)

Country Link
US (5) US7024358B2 (en)
EP (2) EP1604352A4 (en)
CN (1) CN1757060B (en)
WO (5) WO2004084180A2 (en)

Families Citing this family (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7742927B2 (en) * 2000-04-18 2010-06-22 France Telecom Spectral enhancing method and device
US20030187663A1 (en) 2002-03-28 2003-10-02 Truman Michael Mead Broadband frequency translation for high frequency regeneration
JP4178319B2 (en) * 2002-09-13 2008-11-12 インターナショナル・ビジネス・マシーンズ・コーポレーション Phase alignment in speech processing
US7933767B2 (en) * 2004-12-27 2011-04-26 Nokia Corporation Systems and methods for determining pitch lag for a current frame of information
US7706992B2 (en) 2005-02-23 2010-04-27 Digital Intelligence, L.L.C. System and method for signal decomposition, analysis and reconstruction
US20060282264A1 (en) * 2005-06-09 2006-12-14 Bellsouth Intellectual Property Corporation Methods and systems for providing noise filtering using speech recognition
KR101116363B1 (en) * 2005-08-11 2012-03-09 삼성전자주식회사 Method and apparatus for classifying speech signal, and method and apparatus using the same
EP1772855B1 (en) * 2005-10-07 2013-09-18 Nuance Communications, Inc. Method for extending the spectral bandwidth of a speech signal
US7720677B2 (en) * 2005-11-03 2010-05-18 Coding Technologies Ab Time warped modified transform coding of audio signals
JP3981399B1 (en) * 2006-03-10 2007-09-26 松下電器産業株式会社 Fixed codebook search apparatus and fixed codebook search method
KR100900438B1 (en) * 2006-04-25 2009-06-01 삼성전자주식회사 Apparatus and method for voice packet recovery
US8010350B2 (en) * 2006-08-03 2011-08-30 Broadcom Corporation Decimated bisectional pitch refinement
US8239190B2 (en) * 2006-08-22 2012-08-07 Qualcomm Incorporated Time-warping frames of wideband vocoder
JP5061111B2 (en) * 2006-09-15 2012-10-31 パナソニック株式会社 Speech coding apparatus and speech coding method
GB2444757B (en) * 2006-12-13 2009-04-22 Motorola Inc Code excited linear prediction speech coding
US7521622B1 (en) 2007-02-16 2009-04-21 Hewlett-Packard Development Company, L.P. Noise-resistant detection of harmonic segments of audio signals
WO2008107027A1 (en) * 2007-03-02 2008-09-12 Telefonaktiebolaget Lm Ericsson (Publ) Methods and arrangements in a telecommunications network
GB0704622D0 (en) * 2007-03-09 2007-04-18 Skype Ltd Speech coding system and method
CN101320565B (en) * 2007-06-08 2011-05-11 华为技术有限公司 Perception weighting filtering wave method and perception weighting filter thererof
CN101321033B (en) * 2007-06-10 2011-08-10 华为技术有限公司 Frame compensation process and system
US8868417B2 (en) * 2007-06-15 2014-10-21 Alon Konchitsky Handset intelligibility enhancement system using adaptive filters and signal buffers
US20080312916A1 (en) * 2007-06-15 2008-12-18 Mr. Alon Konchitsky Receiver Intelligibility Enhancement System
US8326617B2 (en) * 2007-10-24 2012-12-04 Qnx Software Systems Limited Speech enhancement with minimum gating
US8606566B2 (en) * 2007-10-24 2013-12-10 Qnx Software Systems Limited Speech enhancement through partial speech reconstruction
US8015002B2 (en) 2007-10-24 2011-09-06 Qnx Software Systems Co. Dynamic noise reduction using linear model fitting
US8296136B2 (en) * 2007-11-15 2012-10-23 Qnx Software Systems Limited Dynamic controller for improving speech intelligibility
EP2242048B1 (en) * 2008-01-09 2017-06-14 LG Electronics Inc. Method and apparatus for identifying frame type
CN101483495B (en) * 2008-03-20 2012-02-15 华为技术有限公司 Background noise generation method and noise processing apparatus
FR2929466A1 (en) * 2008-03-28 2009-10-02 France Telecom DISSIMULATION OF TRANSMISSION ERROR IN A DIGITAL SIGNAL IN A HIERARCHICAL DECODING STRUCTURE
US20090319263A1 (en) * 2008-06-20 2009-12-24 Qualcomm Incorporated Coding of transitional speech frames for low-bit-rate applications
US8768690B2 (en) 2008-06-20 2014-07-01 Qualcomm Incorporated Coding scheme selection for low-bit-rate applications
US20090319261A1 (en) * 2008-06-20 2009-12-24 Qualcomm Incorporated Coding of transitional speech frames for low-bit-rate applications
ES2654433T3 (en) 2008-07-11 2018-02-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio signal encoder, method for encoding an audio signal and computer program
MY154452A (en) * 2008-07-11 2015-06-15 Fraunhofer Ges Forschung An apparatus and a method for decoding an encoded audio signal
WO2010003543A1 (en) * 2008-07-11 2010-01-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for calculating bandwidth extension data using a spectral tilt controlling framing
WO2010028301A1 (en) * 2008-09-06 2010-03-11 GH Innovation, Inc. Spectrum harmonic/noise sharpness control
US8532983B2 (en) * 2008-09-06 2013-09-10 Huawei Technologies Co., Ltd. Adaptive frequency prediction for encoding or decoding an audio signal
US8407046B2 (en) * 2008-09-06 2013-03-26 Huawei Technologies Co., Ltd. Noise-feedback for spectral envelope quantization
WO2010028297A1 (en) 2008-09-06 2010-03-11 GH Innovation, Inc. Selective bandwidth extension
WO2010031003A1 (en) 2008-09-15 2010-03-18 Huawei Technologies Co., Ltd. Adding second enhancement layer to celp based core layer
WO2010031049A1 (en) * 2008-09-15 2010-03-18 GH Innovation, Inc. Improving celp post-processing for music signals
CN101599272B (en) * 2008-12-30 2011-06-08 华为技术有限公司 Keynote searching method and device thereof
GB2466668A (en) * 2009-01-06 2010-07-07 Skype Ltd Speech filtering
CN102016530B (en) * 2009-02-13 2012-11-14 华为技术有限公司 Method and device for pitch period detection
WO2011014512A1 (en) 2009-07-27 2011-02-03 Scti Holdings, Inc System and method for noise reduction in processing speech signals by targeting speech and disregarding noise
EP2491555B1 (en) 2009-10-20 2014-03-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Multi-mode audio codec
KR101666521B1 (en) * 2010-01-08 2016-10-14 삼성전자 주식회사 Method and apparatus for detecting pitch period of input signal
US8321216B2 (en) * 2010-02-23 2012-11-27 Broadcom Corporation Time-warping of audio signals for packet loss concealment avoiding audible artifacts
US8473287B2 (en) 2010-04-19 2013-06-25 Audience, Inc. Method for jointly optimizing noise reduction and voice quality in a mono or multi-microphone system
US8538035B2 (en) 2010-04-29 2013-09-17 Audience, Inc. Multi-microphone robust noise suppression
US8798290B1 (en) 2010-04-21 2014-08-05 Audience, Inc. Systems and methods for adaptive signal equalization
US8781137B1 (en) 2010-04-27 2014-07-15 Audience, Inc. Wind noise detection and suppression
US9245538B1 (en) * 2010-05-20 2016-01-26 Audience, Inc. Bandwidth enhancement of speech signals assisted by noise reduction
US8447595B2 (en) * 2010-06-03 2013-05-21 Apple Inc. Echo-related decisions on automatic gain control of uplink speech signal in a communications device
US20110300874A1 (en) * 2010-06-04 2011-12-08 Apple Inc. System and method for removing tdma audio noise
US8447596B2 (en) 2010-07-12 2013-05-21 Audience, Inc. Monaural noise suppression based on computational auditory scene analysis
US8560330B2 (en) 2010-07-19 2013-10-15 Futurewei Technologies, Inc. Energy envelope perceptual correction for high band coding
US9047875B2 (en) 2010-07-19 2015-06-02 Futurewei Technologies, Inc. Spectrum flatness control for bandwidth extension
EP2645365B1 (en) * 2010-11-24 2018-01-17 LG Electronics Inc. Speech signal encoding method and speech signal decoding method
CN102201240B (en) * 2011-05-27 2012-10-03 中国科学院自动化研究所 Harmonic noise excitation model vocoder based on inverse filtering
US8774308B2 (en) 2011-11-01 2014-07-08 At&T Intellectual Property I, L.P. Method and apparatus for improving transmission of data on a bandwidth mismatched channel
US8781023B2 (en) 2011-11-01 2014-07-15 At&T Intellectual Property I, L.P. Method and apparatus for improving transmission of data on a bandwidth expanded channel
EP2774145B1 (en) * 2011-11-03 2020-06-17 VoiceAge EVS LLC Improving non-speech content for low rate celp decoder
US9015039B2 (en) * 2011-12-21 2015-04-21 Huawei Technologies Co., Ltd. Adaptive encoding pitch lag for voiced speech
US9972325B2 (en) * 2012-02-17 2018-05-15 Huawei Technologies Co., Ltd. System and method for mixed codebook excitation for speech coding
CN105976830B (en) * 2013-01-11 2019-09-20 华为技术有限公司 Audio-frequency signal coding and coding/decoding method, audio-frequency signal coding and decoding apparatus
EP3279894B1 (en) * 2013-01-29 2020-04-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoders, audio decoders, systems, methods and computer programs using an increased temporal resolution in temporal proximity of onsets or offsets of fricatives or affricates
EP2830053A1 (en) * 2013-07-22 2015-01-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Multi-channel audio decoder, multi-channel audio encoder, methods and computer program using a residual-signal-based adjustment of a contribution of a decorrelated signal
US9418671B2 (en) * 2013-08-15 2016-08-16 Huawei Technologies Co., Ltd. Adaptive high-pass post-filter
SG11201603425UA (en) 2013-10-31 2016-05-30 Fraunhofer Ges Forschung Audio decoder and method for providing a decoded audio information using an error concealment modifying a time domain excitation signal
CN104637486B (en) * 2013-11-07 2017-12-29 华为技术有限公司 The interpolating method and device of a kind of data frame
US9570095B1 (en) * 2014-01-17 2017-02-14 Marvell International Ltd. Systems and methods for instantaneous noise estimation
KR101850529B1 (en) 2014-01-24 2018-04-19 니폰 덴신 덴와 가부시끼가이샤 Linear predictive analysis apparatus, method, program, and recording medium
CN110415714B (en) * 2014-01-24 2022-11-25 日本电信电话株式会社 Linear prediction analysis device, linear prediction analysis method, and recording medium
US9524735B2 (en) * 2014-01-31 2016-12-20 Apple Inc. Threshold adaptation in two-channel noise estimation and voice activity detection
US9697843B2 (en) * 2014-04-30 2017-07-04 Qualcomm Incorporated High band excitation signal generation
US9467779B2 (en) 2014-05-13 2016-10-11 Apple Inc. Microphone partial occlusion detector
US10149047B2 (en) * 2014-06-18 2018-12-04 Cirrus Logic Inc. Multi-aural MMSE analysis techniques for clarifying audio signals
CN105335592A (en) * 2014-06-25 2016-02-17 国际商业机器公司 Method and equipment for generating data in missing section of time data sequence
FR3024582A1 (en) * 2014-07-29 2016-02-05 Orange MANAGING FRAME LOSS IN A FD / LPD TRANSITION CONTEXT
WO2016103222A2 (en) * 2014-12-23 2016-06-30 Dolby Laboratories Licensing Corporation Methods and devices for improvements relating to voice quality estimation
US11295753B2 (en) * 2015-03-03 2022-04-05 Continental Automotive Systems, Inc. Speech quality under heavy noise conditions in hands-free communication
US9837089B2 (en) * 2015-06-18 2017-12-05 Qualcomm Incorporated High-band signal generation
US10847170B2 (en) 2015-06-18 2020-11-24 Qualcomm Incorporated Device and method for generating a high-band signal from non-linearly processed sub-ranges
US9685170B2 (en) * 2015-10-21 2017-06-20 International Business Machines Corporation Pitch marking in speech processing
US9734844B2 (en) * 2015-11-23 2017-08-15 Adobe Systems Incorporated Irregularity detection in music
WO2017094862A1 (en) * 2015-12-02 2017-06-08 日本電信電話株式会社 Spatial correlation matrix estimation device, spatial correlation matrix estimation method, and spatial correlation matrix estimation program
US10482899B2 (en) 2016-08-01 2019-11-19 Apple Inc. Coordination of beamformers for noise estimation and noise suppression
US10761522B2 (en) * 2016-09-16 2020-09-01 Honeywell Limited Closed-loop model parameter identification techniques for industrial model-based process controllers
EP3324407A1 (en) * 2016-11-17 2018-05-23 Fraunhofer Gesellschaft zur Förderung der Angewand Apparatus and method for decomposing an audio signal using a ratio as a separation characteristic
EP3324406A1 (en) 2016-11-17 2018-05-23 Fraunhofer Gesellschaft zur Förderung der Angewand Apparatus and method for decomposing an audio signal using a variable threshold
US11602311B2 (en) 2019-01-29 2023-03-14 Murata Vios, Inc. Pulse oximetry system
US11404061B1 (en) * 2021-01-11 2022-08-02 Ford Global Technologies, Llc Speech filtering for masks
US11545143B2 (en) 2021-05-18 2023-01-03 Boris Fridman-Mintz Recognition or synthesis of human-uttered harmonic sounds
CN113872566B (en) * 2021-12-02 2022-02-11 成都星联芯通科技有限公司 Modulation filtering device and method with continuously adjustable bandwidth

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6173257B1 (en) * 1998-08-24 2001-01-09 Conexant Systems, Inc Completed fixed codebook for speech encoder

Family Cites Families (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4831551A (en) * 1983-01-28 1989-05-16 Texas Instruments Incorporated Speaker-dependent connected speech word recognizer
US4989248A (en) * 1983-01-28 1991-01-29 Texas Instruments Incorporated Speaker-dependent connected speech word recognition method
US4751737A (en) * 1985-11-06 1988-06-14 Motorola Inc. Template generation method in a speech recognition system
US5086475A (en) * 1988-11-19 1992-02-04 Sony Corporation Apparatus for generating, recording or reproducing sound source data
US5371853A (en) * 1991-10-28 1994-12-06 University Of Maryland At College Park Method and system for CELP speech coding and codebook for use therewith
US5765127A (en) * 1992-03-18 1998-06-09 Sony Corp High efficiency encoding method
JP3277398B2 (en) * 1992-04-15 2002-04-22 ソニー株式会社 Voiced sound discrimination method
US5734789A (en) * 1992-06-01 1998-03-31 Hughes Electronics Voiced, unvoiced or noise modes in a CELP vocoder
US5574825A (en) * 1994-03-14 1996-11-12 Lucent Technologies Inc. Linear prediction coefficient generation during frame erasure or packet loss
JP3557662B2 (en) * 1994-08-30 2004-08-25 ソニー株式会社 Speech encoding method and speech decoding method, and speech encoding device and speech decoding device
US5699477A (en) * 1994-11-09 1997-12-16 Texas Instruments Incorporated Mixed excitation linear prediction with fractional pitch
FI97612C (en) * 1995-05-19 1997-01-27 Tamrock Oy An arrangement for guiding a rock drilling rig winch
US5706392A (en) * 1995-06-01 1998-01-06 Rutgers, The State University Of New Jersey Perceptual speech coder and method
US5732389A (en) * 1995-06-07 1998-03-24 Lucent Technologies Inc. Voiced/unvoiced classification of speech for excitation codebook selection in celp speech decoding during frame erasures
US5664055A (en) * 1995-06-07 1997-09-02 Lucent Technologies Inc. CS-ACELP speech compression system with adaptive pitch prediction filter gain based on a measure of periodicity
US5774837A (en) * 1995-09-13 1998-06-30 Voxware, Inc. Speech coding system and method using voicing probability determination
DE69732746C5 (en) * 1996-02-15 2020-11-19 Koninklijke Philips N.V. SIGNAL TRANSMISSION SYSTEM WITH REDUCED COMPLEXITY
US5809459A (en) * 1996-05-21 1998-09-15 Motorola, Inc. Method and apparatus for speech excitation waveform coding using multiple error waveforms
JPH1091194A (en) * 1996-09-18 1998-04-10 Sony Corp Method of voice decoding and device therefor
JP3707154B2 (en) 1996-09-24 2005-10-19 ソニー株式会社 Speech coding method and apparatus
JP3707153B2 (en) * 1996-09-24 2005-10-19 ソニー株式会社 Vector quantization method, speech coding method and apparatus
US6014622A (en) * 1996-09-26 2000-01-11 Rockwell Semiconductor Systems, Inc. Low bit rate speech coder using adaptive open-loop subframe pitch lag estimation and vector quantization
EP0878790A1 (en) * 1997-05-15 1998-11-18 Hewlett-Packard Company Voice coding system and method
WO1999010719A1 (en) * 1997-08-29 1999-03-04 The Regents Of The University Of California Method and apparatus for hybrid coding of speech at 4kbps
US6263312B1 (en) * 1997-10-03 2001-07-17 Alaris, Inc. Audio compression and decompression employing subband decomposition of residual signal and distortion reduction
US6169970B1 (en) * 1998-01-08 2001-01-02 Lucent Technologies Inc. Generalized analysis-by-synthesis speech coding method and apparatus
US6182033B1 (en) * 1998-01-09 2001-01-30 At&T Corp. Modular approach to speech enhancement with an application to speech coding
US6272231B1 (en) * 1998-11-06 2001-08-07 Eyematic Interfaces, Inc. Wavelet-based facial motion capture for avatar animation
EP0995190B1 (en) * 1998-05-11 2005-08-03 Koninklijke Philips Electronics N.V. Audio coding based on determining a noise contribution from a phase change
GB9811019D0 (en) * 1998-05-21 1998-07-22 Univ Surrey Speech coders
US6141638A (en) * 1998-05-28 2000-10-31 Motorola, Inc. Method and apparatus for coding an information signal
CA2300077C (en) * 1998-06-09 2007-09-04 Matsushita Electric Industrial Co., Ltd. Speech coding apparatus and speech decoding apparatus
US6138092A (en) * 1998-07-13 2000-10-24 Lockheed Martin Corporation CELP speech synthesizer with epoch-adaptive harmonic generator for pitch harmonics below voicing cutoff frequency
US6330533B2 (en) * 1998-08-24 2001-12-11 Conexant Systems, Inc. Speech encoder adaptively applying pitch preprocessing with warping of target signal
US6260010B1 (en) * 1998-08-24 2001-07-10 Conexant Systems, Inc. Speech encoder using gain normalization that combines open and closed loop gains
JP4249821B2 (en) * 1998-08-31 2009-04-08 富士通株式会社 Digital audio playback device
US6691084B2 (en) * 1998-12-21 2004-02-10 Qualcomm Incorporated Multiple mode variable rate speech coding
US6308155B1 (en) * 1999-01-20 2001-10-23 International Computer Science Institute Feature extraction for automatic speech recognition
US6453287B1 (en) * 1999-02-04 2002-09-17 Georgia-Tech Research Corporation Apparatus and quality enhancement algorithm for mixed excitation linear predictive (MELP) and other speech coders
US7423983B1 (en) * 1999-09-20 2008-09-09 Broadcom Corporation Voice and data exchange over a packet based network
US6889183B1 (en) * 1999-07-15 2005-05-03 Nortel Networks Limited Apparatus and method of regenerating a lost audio segment
US6691082B1 (en) * 1999-08-03 2004-02-10 Lucent Technologies Inc Method and system for sub-band hybrid coding
US6910011B1 (en) * 1999-08-16 2005-06-21 Haman Becker Automotive Systems - Wavemakers, Inc. Noisy acoustic signal enhancement
US6111183A (en) * 1999-09-07 2000-08-29 Lindemann; Eric Audio signal synthesis system based on probabilistic estimation of time-varying spectra
SE9903223L (en) * 1999-09-09 2001-05-08 Ericsson Telefon Ab L M Method and apparatus of telecommunication systems
US6959274B1 (en) * 1999-09-22 2005-10-25 Mindspeed Technologies, Inc. Fixed rate speech compression system and method
US6574593B1 (en) 1999-09-22 2003-06-03 Conexant Systems, Inc. Codebook tables for encoding and decoding
US6581032B1 (en) * 1999-09-22 2003-06-17 Conexant Systems, Inc. Bitstream protocol for transmission of encoded voice signals
US6636829B1 (en) * 1999-09-22 2003-10-21 Mindspeed Technologies, Inc. Speech communication system and method for handling lost frames
JP2003514263A (en) * 1999-11-10 2003-04-15 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Wideband speech synthesis using mapping matrix
FI116643B (en) * 1999-11-15 2006-01-13 Nokia Corp Noise reduction
US20070110042A1 (en) * 1999-12-09 2007-05-17 Henry Li Voice and data exchange over a packet based network
US6766292B1 (en) * 2000-03-28 2004-07-20 Tellabs Operations, Inc. Relative noise ratio weighting techniques for adaptive noise cancellation
FI115329B (en) * 2000-05-08 2005-04-15 Nokia Corp Method and arrangement for switching the source signal bandwidth in a communication connection equipped for many bandwidths
US7136810B2 (en) * 2000-05-22 2006-11-14 Texas Instruments Incorporated Wideband speech coding system and method
US20020016698A1 (en) * 2000-06-26 2002-02-07 Toshimichi Tokuda Device and method for audio frequency range expansion
US6990453B2 (en) * 2000-07-31 2006-01-24 Landmark Digital Services Llc System and methods for recognizing sound and music signals in high noise and distortion
US6898566B1 (en) * 2000-08-16 2005-05-24 Mindspeed Technologies, Inc. Using signal to noise ratio of a speech signal to adjust thresholds for extracting speech parameters for coding the speech signal
DE10041512B4 (en) * 2000-08-24 2005-05-04 Infineon Technologies Ag Method and device for artificially expanding the bandwidth of speech signals
CA2327041A1 (en) * 2000-11-22 2002-05-22 Voiceage Corporation A method for indexing pulse positions and signs in algebraic codebooks for efficient coding of wideband signals
US6937904B2 (en) * 2000-12-13 2005-08-30 Alfred E. Mann Institute For Biomedical Engineering At The University Of Southern California System and method for providing recovery from muscle denervation
US20020133334A1 (en) * 2001-02-02 2002-09-19 Geert Coorman Time scale modification of digitally sampled waveforms in the time domain
WO2002087137A2 (en) * 2001-04-24 2002-10-31 Nokia Corporation Methods for changing the size of a jitter buffer and for time alignment, communications system, receiving end, and transcoder
US6766289B2 (en) * 2001-06-04 2004-07-20 Qualcomm Incorporated Fast code-vector searching
US6985857B2 (en) * 2001-09-27 2006-01-10 Motorola, Inc. Method and apparatus for speech coding using training and quantizing
SE521600C2 (en) * 2001-12-04 2003-11-18 Global Ip Sound Ab Lågbittaktskodek
US7283585B2 (en) * 2002-09-27 2007-10-16 Broadcom Corporation Multiple data rate communication system
US7519530B2 (en) * 2003-01-09 2009-04-14 Nokia Corporation Audio signal processing
US7254648B2 (en) * 2003-01-30 2007-08-07 Utstarcom, Inc. Universal broadband server system and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6173257B1 (en) * 1998-08-24 2001-01-09 Conexant Systems, Inc Completed fixed codebook for speech encoder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1604354A4 *

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