FI932465A - Celp-baserad talkompressor - Google Patents

Celp-baserad talkompressor Download PDF

Info

Publication number
FI932465A
FI932465A FI932465A FI932465A FI932465A FI 932465 A FI932465 A FI 932465A FI 932465 A FI932465 A FI 932465A FI 932465 A FI932465 A FI 932465A FI 932465 A FI932465 A FI 932465A
Authority
FI
Finland
Prior art keywords
audio
kbps
celp
comparable
bit rate
Prior art date
Application number
FI932465A
Other languages
English (en)
Finnish (fi)
Other versions
FI932465A0 (fi
Inventor
Kumar Swaminathan
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of FI932465A0 publication Critical patent/FI932465A0/fi
Publication of FI932465A publication Critical patent/FI932465A/fi

Links

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
    • 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
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0002—Codebook adaptations
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0003—Backward prediction of gain
    • 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
    • G10L25/93—Discriminating between voiced and unvoiced parts of speech signals
FI932465A 1992-06-01 1993-05-28 Celp-baserad talkompressor FI932465A (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89159692A 1992-06-01 1992-06-01
US07/905,992 US5495555A (en) 1992-06-01 1992-06-25 High quality low bit rate celp-based speech codec

Publications (2)

Publication Number Publication Date
FI932465A0 FI932465A0 (fi) 1993-05-28
FI932465A true FI932465A (fi) 1993-12-02

Family

ID=27128985

Family Applications (1)

Application Number Title Priority Date Filing Date
FI932465A FI932465A (fi) 1992-06-01 1993-05-28 Celp-baserad talkompressor

Country Status (8)

Country Link
US (1) US5495555A (no)
EP (1) EP0573398B1 (no)
JP (1) JPH0736118B2 (no)
AT (1) ATE174146T1 (no)
CA (1) CA2096991C (no)
DE (1) DE69322313T2 (no)
FI (1) FI932465A (no)
NO (1) NO931974L (no)

Families Citing this family (119)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2166355T3 (es) * 1991-06-11 2002-04-16 Qualcomm Inc Vocodificador de velocidad variable.
US5734789A (en) * 1992-06-01 1998-03-31 Hughes Electronics Voiced, unvoiced or noise modes in a CELP vocoder
JP3137805B2 (ja) * 1993-05-21 2001-02-26 三菱電機株式会社 音声符号化装置、音声復号化装置、音声後処理装置及びこれらの方法
JP2624130B2 (ja) * 1993-07-29 1997-06-25 日本電気株式会社 音声符号化方式
CA2137756C (en) * 1993-12-10 2000-02-01 Kazunori Ozawa Voice coder and a method for searching codebooks
CA2136891A1 (en) * 1993-12-20 1995-06-21 Kalyan Ganesan Removal of swirl artifacts from celp based speech coders
DE69526926T2 (de) * 1994-02-01 2003-01-02 Qualcomm Inc Lineare vorhersage durch impulsanregung
US6463406B1 (en) * 1994-03-25 2002-10-08 Texas Instruments Incorporated Fractional pitch method
JPH0830299A (ja) * 1994-07-19 1996-02-02 Nec Corp 音声符号化装置
US5774838A (en) * 1994-09-30 1998-06-30 Kabushiki Kaisha Toshiba Speech coding system utilizing vector quantization capable of minimizing quality degradation caused by transmission code error
JP3557255B2 (ja) * 1994-10-18 2004-08-25 松下電器産業株式会社 Ｌｓｐパラメータ復号化装置及び復号化方法
US5727125A (en) * 1994-12-05 1998-03-10 Motorola, Inc. Method and apparatus for synthesis of speech excitation waveforms
US5751903A (en) * 1994-12-19 1998-05-12 Hughes Electronics Low rate multi-mode CELP codec that encodes line SPECTRAL frequencies utilizing an offset
US5774846A (en) * 1994-12-19 1998-06-30 Matsushita Electric Industrial Co., Ltd. Speech coding apparatus, linear prediction coefficient analyzing apparatus and noise reducing apparatus
US5680506A (en) * 1994-12-29 1997-10-21 Lucent Technologies Inc. Apparatus and method for speech signal analysis
FR2729247A1 (fr) * 1995-01-06 1996-07-12 Matra Communication Procede de codage de parole a analyse par synthese
FR2729245B1 (fr) * 1995-01-06 1997-04-11 Lamblin Claude Procede de codage de parole a prediction lineaire et excitation par codes algebriques
FR2729244B1 (fr) * 1995-01-06 1997-03-28 Matra Communication Procede de codage de parole a analyse par synthese
FR2729246A1 (fr) * 1995-01-06 1996-07-12 Matra Communication Procede de codage de parole a analyse par synthese
EP0944037B1 (en) * 1995-01-17 2001-10-10 Nec Corporation Speech encoder with features extracted from current and previous frames
US5668924A (en) * 1995-01-18 1997-09-16 Olympus Optical Co. Ltd. Digital sound recording and reproduction device using a coding technique to compress data for reduction of memory requirements
JP3303580B2 (ja) * 1995-02-23 2002-07-22 日本電気株式会社 音声符号化装置
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
GB9512284D0 (en) * 1995-06-16 1995-08-16 Nokia Mobile Phones Ltd Speech Synthesiser
US5781882A (en) * 1995-09-14 1998-07-14 Motorola, Inc. Very low bit rate voice messaging system using asymmetric voice compression processing
US5781881A (en) * 1995-10-19 1998-07-14 Deutsche Telekom Ag Variable-subframe-length speech-coding classes derived from wavelet-transform parameters
JP4005154B2 (ja) * 1995-10-26 2007-11-07 ソニー株式会社 音声復号化方法及び装置
JP3680380B2 (ja) * 1995-10-26 2005-08-10 ソニー株式会社 音声符号化方法及び装置
US5659622A (en) * 1995-11-13 1997-08-19 Motorola, Inc. Method and apparatus for suppressing noise in a communication system
US5794199A (en) * 1996-01-29 1998-08-11 Texas Instruments Incorporated Method and system for improved discontinuous speech transmission
EP0788091A3 (en) * 1996-01-31 1999-02-24 Kabushiki Kaisha Toshiba Speech encoding and decoding method and apparatus therefor
US5819224A (en) * 1996-04-01 1998-10-06 The Victoria University Of Manchester Split matrix quantization
US5794180A (en) * 1996-04-30 1998-08-11 Texas Instruments Incorporated Signal quantizer wherein average level replaces subframe steady-state levels
US5960386A (en) * 1996-05-17 1999-09-28 Janiszewski; Thomas John Method for adaptively controlling the pitch gain of a vocoder's adaptive codebook
JPH09312620A (ja) * 1996-05-23 1997-12-02 Nec Corp 音声データ補間処理装置
JPH09319397A (ja) * 1996-05-28 1997-12-12 Sony Corp ディジタル信号処理装置
EP0913034A2 (en) * 1996-07-17 1999-05-06 Université de Sherbrooke Enhanced encoding of dtmf and other signalling tones
AU4497097A (en) * 1996-09-25 1998-04-17 Qualcomm Incorporated Method and apparatus for detecting bad data packets received by a mobile telephone using decoded speech parameters
US7788092B2 (en) * 1996-09-25 2010-08-31 Qualcomm Incorporated Method and apparatus for detecting bad data packets received by a mobile telephone using decoded speech parameters
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
GB2318029B (en) * 1996-10-01 2000-11-08 Nokia Mobile Phones Ltd Audio coding method and apparatus
US6148282A (en) * 1997-01-02 2000-11-14 Texas Instruments Incorporated Multimodal code-excited linear prediction (CELP) coder and method using peakiness measure
JP3064947B2 (ja) * 1997-03-26 2000-07-12 日本電気株式会社 音声・楽音符号化及び復号化装置
KR100198476B1 (ko) * 1997-04-23 1999-06-15 윤종용 노이즈에 견고한 스펙트럼 포락선 양자화기 및 양자화 방법
US5946650A (en) * 1997-06-19 1999-08-31 Tritech Microelectronics, Ltd. Efficient pitch estimation method
US5924062A (en) * 1997-07-01 1999-07-13 Nokia Mobile Phones ACLEP codec with modified autocorrelation matrix storage and search
US6266419B1 (en) * 1997-07-03 2001-07-24 At&T Corp. Custom character-coding compression for encoding and watermarking media content
US6058359A (en) * 1998-03-04 2000-05-02 Telefonaktiebolaget L M Ericsson Speech coding including soft adaptability feature
US6108624A (en) * 1997-09-10 2000-08-22 Samsung Electronics Co., Ltd. Method for improving performance of a voice coder
JP3263347B2 (ja) * 1997-09-20 2002-03-04 松下電送システム株式会社 音声符号化装置及び音声符号化におけるピッチ予測方法
US6253173B1 (en) * 1997-10-20 2001-06-26 Nortel Networks Corporation Split-vector quantization for speech signal involving out-of-sequence regrouping of sub-vectors
US5966688A (en) * 1997-10-28 1999-10-12 Hughes Electronics Corporation Speech mode based multi-stage vector quantizer
EP2154679B1 (en) 1997-12-24 2016-09-14 BlackBerry Limited Method and apparatus for speech coding
US7392180B1 (en) * 1998-01-09 2008-06-24 At&T Corp. System and method of coding sound signals using sound enhancement
US6182033B1 (en) * 1998-01-09 2001-01-30 At&T Corp. Modular approach to speech enhancement with an application to speech coding
US6104994A (en) * 1998-01-13 2000-08-15 Conexant Systems, Inc. Method for speech coding under background noise conditions
JP3618217B2 (ja) * 1998-02-26 2005-02-09 パイオニア株式会社 音声のピッチ符号化方法及び音声のピッチ符号化装置並びに音声のピッチ符号化プログラムが記録された記録媒体
US6823013B1 (en) * 1998-03-23 2004-11-23 International Business Machines Corporation Multiple encoder architecture for extended search
US6470309B1 (en) * 1998-05-08 2002-10-22 Texas Instruments Incorporated Subframe-based correlation
US6810377B1 (en) * 1998-06-19 2004-10-26 Comsat Corporation Lost frame recovery techniques for parametric, LPC-based speech coding systems
US6173254B1 (en) * 1998-08-18 2001-01-09 Denso Corporation, Ltd. Recorded message playback system for a variable bit rate system
US6507814B1 (en) * 1998-08-24 2003-01-14 Conexant Systems, Inc. Pitch determination using speech classification and prior pitch estimation
US6240386B1 (en) * 1998-08-24 2001-05-29 Conexant Systems, Inc. Speech codec employing noise classification for noise compensation
US7072832B1 (en) * 1998-08-24 2006-07-04 Mindspeed Technologies, Inc. System for speech encoding having an adaptive encoding arrangement
US7117146B2 (en) * 1998-08-24 2006-10-03 Mindspeed Technologies, Inc. System for improved use of pitch enhancement with subcodebooks
FR2783651A1 (fr) * 1998-09-22 2000-03-24 Koninkl Philips Electronics Nv Dispositif et procede de filtrage d'un signal de parole, recepteur et systeme de communications telephonique
US6182030B1 (en) 1998-12-18 2001-01-30 Telefonaktiebolaget Lm Ericsson (Publ) Enhanced coding to improve coded communication signals
US6691084B2 (en) * 1998-12-21 2004-02-10 Qualcomm Incorporated Multiple mode variable rate speech coding
US6311154B1 (en) 1998-12-30 2001-10-30 Nokia Mobile Phones Limited Adaptive windows for analysis-by-synthesis CELP-type speech coding
US6377914B1 (en) 1999-03-12 2002-04-23 Comsat Corporation Efficient quantization of speech spectral amplitudes based on optimal interpolation technique
EP1095370A1 (en) 1999-04-05 2001-05-02 Hughes Electronics Corporation Spectral phase modeling of the prototype waveform components for a frequency domain interpolative speech codec system
JP4464488B2 (ja) * 1999-06-30 2010-05-19 パナソニック株式会社 音声復号化装置及び符号誤り補償方法、音声復号化方法
US6704701B1 (en) * 1999-07-02 2004-03-09 Mindspeed Technologies, Inc. Bi-directional pitch enhancement in speech coding systems
US7092881B1 (en) * 1999-07-26 2006-08-15 Lucent Technologies Inc. Parametric speech codec for representing synthetic speech in the presence of background noise
US6782360B1 (en) * 1999-09-22 2004-08-24 Mindspeed Technologies, Inc. Gain quantization for a CELP speech coder
US6574593B1 (en) * 1999-09-22 2003-06-03 Conexant Systems, Inc. Codebook tables for encoding and decoding
US6826527B1 (en) * 1999-11-23 2004-11-30 Texas Instruments Incorporated Concealment of frame erasures and method
CN1366659A (zh) * 2000-02-10 2002-08-28 皇家菲利浦电子有限公司 具有音调变化检测的纠错方法
JP2001318694A (ja) * 2000-05-10 2001-11-16 Toshiba Corp 信号処理装置、信号処理方法および記録媒体
US6564182B1 (en) * 2000-05-12 2003-05-13 Conexant Systems, Inc. Look-ahead pitch determination
US6587816B1 (en) * 2000-07-14 2003-07-01 International Business Machines Corporation Fast frequency-domain pitch estimation
US7013268B1 (en) * 2000-07-25 2006-03-14 Mindspeed Technologies, Inc. Method and apparatus for improved weighting filters in a CELP encoder
US7133823B2 (en) * 2000-09-15 2006-11-07 Mindspeed Technologies, Inc. System for an adaptive excitation pattern for speech coding
EP1199812A1 (en) * 2000-10-20 2002-04-24 Telefonaktiebolaget Lm Ericsson Perceptually improved encoding of acoustic signals
US7606703B2 (en) * 2000-11-15 2009-10-20 Texas Instruments Incorporated Layered celp system and method with varying perceptual filter or short-term postfilter strengths
CZ304196B6 (cs) * 2000-11-30 2013-12-27 Panasonic Corporation Vektorové kvantizační zařízení LPC parametru, kodér řeči a přijímací zařízení signálu řeči
JP3907161B2 (ja) * 2001-06-29 2007-04-18 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 キーワード検索方法、キーワード検索端末、コンピュータプログラム
US7272555B2 (en) * 2001-09-13 2007-09-18 Industrial Technology Research Institute Fine granularity scalability speech coding for multi-pulses CELP-based algorithm
US6823011B2 (en) * 2001-11-19 2004-11-23 Mitsubishi Electric Research Laboratories, Inc. Unusual event detection using motion activity descriptors
US7054807B2 (en) * 2002-11-08 2006-05-30 Motorola, Inc. Optimizing encoder for efficiently determining analysis-by-synthesis codebook-related parameters
WO2004064041A1 (en) 2003-01-09 2004-07-29 Dilithium Networks Pty Limited Method and apparatus for improved quality voice transcoding
EP1513137A1 (en) * 2003-08-22 2005-03-09 MicronasNIT LCC, Novi Sad Institute of Information Technologies Speech processing system and method with multi-pulse excitation
FR2867649A1 (fr) * 2003-12-10 2005-09-16 France Telecom Procede de codage multiple optimise
EP2752874A1 (en) 2004-06-07 2014-07-09 Fluidigm Corporation Method and apparatus for imaging a device under temperature control
DE102005000828A1 (de) 2005-01-05 2006-07-13 Siemens Ag Verfahren zum Codieren eines analogen Signals
US20060215683A1 (en) * 2005-03-28 2006-09-28 Tellabs Operations, Inc. Method and apparatus for voice quality enhancement
US20060217970A1 (en) * 2005-03-28 2006-09-28 Tellabs Operations, Inc. Method and apparatus for noise reduction
US20070160154A1 (en) * 2005-03-28 2007-07-12 Sukkar Rafid A Method and apparatus for injecting comfort noise in a communications signal
US20060217988A1 (en) * 2005-03-28 2006-09-28 Tellabs Operations, Inc. Method and apparatus for adaptive level control
US20060217983A1 (en) * 2005-03-28 2006-09-28 Tellabs Operations, Inc. Method and apparatus for injecting comfort noise in a communications system
US20060217972A1 (en) * 2005-03-28 2006-09-28 Tellabs Operations, Inc. Method and apparatus for modifying an encoded signal
US9058812B2 (en) * 2005-07-27 2015-06-16 Google Technology Holdings LLC Method and system for coding an information signal using pitch delay contour adjustment
US8032369B2 (en) * 2006-01-20 2011-10-04 Qualcomm Incorporated Arbitrary average data rates for variable rate coders
US8090573B2 (en) * 2006-01-20 2012-01-03 Qualcomm Incorporated Selection of encoding modes and/or encoding rates for speech compression with open loop re-decision
US8346544B2 (en) * 2006-01-20 2013-01-01 Qualcomm Incorporated Selection of encoding modes and/or encoding rates for speech compression with closed loop re-decision
ATE475170T1 (de) * 2006-03-20 2010-08-15 Mindspeed Tech Inc Tonhöhen-track-glättung in offener schleife
EP2102619B1 (en) * 2006-10-24 2017-03-22 Voiceage Corporation Method and device for coding transition frames in speech signals
KR101449431B1 (ko) * 2007-10-09 2014-10-14 삼성전자주식회사 계층형 광대역 오디오 신호의 부호화 방법 및 장치
US20090271196A1 (en) * 2007-10-24 2009-10-29 Red Shift Company, Llc Classifying portions of a signal representing speech
US20100208777A1 (en) * 2009-02-17 2010-08-19 Adc Telecommunications, Inc. Distributed antenna system using gigabit ethernet physical layer device
MY164399A (en) * 2009-10-20 2017-12-15 Fraunhofer Ges Forschung Multi-mode audio codec and celp coding adapted therefore
CN102893330B (zh) * 2010-05-11 2015-04-15 瑞典爱立信有限公司 用于处理音频信号的方法和装置
EP2593937B1 (en) 2010-07-16 2015-11-11 Telefonaktiebolaget LM Ericsson (publ) Audio encoder and decoder and methods for encoding and decoding an audio signal
EP2795613B1 (en) * 2011-12-21 2017-11-29 Huawei Technologies Co., Ltd. Very short pitch detection and coding
US9070356B2 (en) * 2012-04-04 2015-06-30 Google Technology Holdings LLC Method and apparatus for generating a candidate code-vector to code an informational signal
US9263053B2 (en) * 2012-04-04 2016-02-16 Google Technology Holdings LLC Method and apparatus for generating a candidate code-vector to code an informational signal
TR201818834T4 (tr) * 2012-10-05 2019-01-21 Fraunhofer Ges Forschung Otokorelasyon alanında acelp kullanan bir konuşma sinyalinin şifrelenmesine ilişkin bir ekipman.
CN105551497B (zh) 2013-01-15 2019-03-19 华为技术有限公司 编码方法、解码方法、编码装置和解码装置
US9754193B2 (en) * 2013-06-27 2017-09-05 Hewlett-Packard Development Company, L.P. Authenticating a user by correlating speech and corresponding lip shape

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701955A (en) * 1982-10-21 1987-10-20 Nec Corporation Variable frame length vocoder
US4696038A (en) * 1983-04-13 1987-09-22 Texas Instruments Incorporated Voice messaging system with unified pitch and voice tracking
US4803730A (en) * 1986-10-31 1989-02-07 American Telephone And Telegraph Company, At&T Bell Laboratories Fast significant sample detection for a pitch detector
ES2037101T3 (es) * 1987-03-05 1993-06-16 International Business Machines Corporation Procedimiento de deteccion de tono y codificador de voz que utiliza dicho procedimiento.
US4899385A (en) * 1987-06-26 1990-02-06 American Telephone And Telegraph Company Code excited linear predictive vocoder
US4989250A (en) * 1988-02-19 1991-01-29 Sanyo Electric Co., Ltd. Speech synthesizing apparatus and method
DE68916944T2 (de) * 1989-04-11 1995-03-16 Ibm Verfahren zur schnellen Bestimmung der Grundfrequenz in Sprachcodierern mit langfristiger Prädiktion.
JPH0365822A (ja) * 1989-08-04 1991-03-20 Fujitsu Ltd ベクトル量子化符号器及びベクトル量子化復号器
US5307441A (en) * 1989-11-29 1994-04-26 Comsat Corporation Wear-toll quality 4.8 kbps speech codec
FR2661541A1 (fr) * 1990-04-27 1991-10-31 Thomson Csf Procede et dispositif de codage bas debit de la parole.
US5271089A (en) * 1990-11-02 1993-12-14 Nec Corporation Speech parameter encoding method capable of transmitting a spectrum parameter at a reduced number of bits
US5195137A (en) * 1991-01-28 1993-03-16 At&T Bell Laboratories Method of and apparatus for generating auxiliary information for expediting sparse codebook search
US5253269A (en) * 1991-09-05 1993-10-12 Motorola, Inc. Delta-coded lag information for use in a speech coder
US5233660A (en) * 1991-09-10 1993-08-03 At&T Bell Laboratories Method and apparatus for low-delay celp speech coding and decoding
US5285498A (en) * 1992-03-02 1994-02-08 At&T Bell Laboratories Method and apparatus for coding audio signals based on perceptual model
US5327520A (en) * 1992-06-04 1994-07-05 At&T Bell Laboratories Method of use of voice message coder/decoder

Also Published As

Publication number Publication date
NO931974L (no) 1993-12-02
CA2096991A1 (en) 1993-12-02
JPH0635500A (ja) 1994-02-10
DE69322313T2 (de) 1999-07-01
US5495555A (en) 1996-02-27
EP0573398B1 (en) 1998-12-02
DE69322313D1 (de) 1999-01-14
CA2096991C (en) 1997-03-18
ATE174146T1 (de) 1998-12-15
FI932465A0 (fi) 1993-05-28
JPH0736118B2 (ja) 1995-04-19
NO931974D0 (no) 1993-05-28
EP0573398A2 (en) 1993-12-08
EP0573398A3 (no) 1994-02-16

Similar Documents

Publication Publication Date Title
FI932465A (fi) Celp-baserad talkompressor
MX9602391A (es) Metodo y aparato para reproducir señales de conversacion y metodo para transmitirlas.
SE9800268L (sv) En metod och anordning för reduktion av dataflöde baserad på harmonisk bandbreddsexpansion
AU2002215138A1 (en) Method and system for speech frame error concealment in speech decoding
NO981532D0 (no) Fremgangsmåte og innretning for koding av lydsignaler
ATE272885T1 (de) Multimodaler sprachkodierer
JP2004508597A (ja) オーディオ信号における伝送エラーの抑止シミュレーション
MX9605122A (es) Metodo y aparato de codificacion de voz y metodo y aparato de descodificacion de voz.
ATE206252T1 (de) Verfahren und vorrichtung zum codieren von audiosignalen sowie verfahren und vorrichtungen zum decodieren eines bitstroms
CA2156000A1 (en) Frame Erasure or Packet Loss Compensation Method
JP2009134303A (ja) 音声復号化方法及び音声復号化装置
BRPI0015070B1 (pt) método para codificar frames de fala, e, codificador de fala para reduzir sensibilidade às condições de erro de frame
EP1194925B1 (en) Bi-directional pitch enhancement in speech coding systems
CA2137416A1 (en) Speech Decoder Capable of Reproducing Well Background Noise
Wang et al. Parameter interpolation to enhance the frame erasure robustness of CELP coders in packet networks
EP1204092A3 (en) Speech decoder capable of decoding background noise signal with high quality
Watkins et al. Improving 16 kb/s G. 728 LD-CELP speech coder for frame erasure channels
Mouy et al. Voice transmission at a very low bit rate on a noisy channel: 800 bps vocoder with error protection to 1200 bps
BRPI0520115A2 (pt) métodos para codificar e para decodificar sinais de áudio e codificador e decodificador para sinais de áudio
KR100468960B1 (ko) 음성부호화 시스템의 양방향 피치 강화 시스템
KR930024408A (ko) Lsp 보코더
WO2002023533A3 (en) System for improved use of pitch enhancement with subcodebooks
JPS5895800A (ja) 音声合成装置の符号化方法

Legal Events

Date Code Title Description
GB Transfer or assigment of application

Owner name: HUGHES ELECTRONICS CORPORATION