DE60124274D1 - Codebuchstruktur und suchverfahren für die sprachkodierung - Google Patents

Codebuchstruktur und suchverfahren für die sprachkodierung

Info

Publication number
DE60124274D1
DE60124274D1 DE60124274T DE60124274T DE60124274D1 DE 60124274 D1 DE60124274 D1 DE 60124274D1 DE 60124274 T DE60124274 T DE 60124274T DE 60124274 T DE60124274 T DE 60124274T DE 60124274 D1 DE60124274 D1 DE 60124274D1
Authority
DE
Germany
Prior art keywords
speech
rate
codec
rate codec
coding
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE60124274T
Other languages
English (en)
Other versions
DE60124274T2 (de
Inventor
Yang Gao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HTC Corp
Original Assignee
Mindspeed Technologies LLC
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 Technologies LLC filed Critical Mindspeed Technologies LLC
Publication of DE60124274D1 publication Critical patent/DE60124274D1/de
Application granted granted Critical
Publication of DE60124274T2 publication Critical patent/DE60124274T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/012—Comfort noise or silence coding
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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 TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/083—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being an excitation gain
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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 TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/125—Pitch excitation, e.g. pitch synchronous innovation CELP [PSI-CELP]
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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 TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques 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
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/002—Dynamic bit allocation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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 TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L2019/0004—Design or structure of the codebook
    • G10L2019/0005—Multi-stage vector quantisation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L2019/0007—Codebook element generation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L2019/0011—Long term prediction filters, i.e. pitch estimation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
DE60124274T 2000-09-15 2001-09-17 Codebuchstruktur und suchverfahren für die sprachkodierung Expired - Lifetime DE60124274T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/663,242 US6556966B1 (en) 1998-08-24 2000-09-15 Codebook structure for changeable pulse multimode speech coding
US663242 2000-09-15
PCT/IB2001/001729 WO2002025638A2 (en) 2000-09-15 2001-09-17 Codebook structure and search for speech coding

Publications (2)

Publication Number Publication Date
DE60124274D1 true DE60124274D1 (de) 2006-12-14
DE60124274T2 DE60124274T2 (de) 2007-06-21

Family

ID=24660996

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60124274T Expired - Lifetime DE60124274T2 (de) 2000-09-15 2001-09-17 Codebuchstruktur und suchverfahren für die sprachkodierung

Country Status (8)

Country Link
US (1) US6556966B1 (de)
EP (1) EP1317753B1 (de)
KR (1) KR20030046451A (de)
CN (1) CN1240049C (de)
AT (1) ATE344519T1 (de)
AU (1) AU2001287969A1 (de)
DE (1) DE60124274T2 (de)
WO (1) WO2002025638A2 (de)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6704701B1 (en) * 1999-07-02 2004-03-09 Mindspeed Technologies, Inc. Bi-directional pitch enhancement in speech coding systems
US6959274B1 (en) * 1999-09-22 2005-10-25 Mindspeed Technologies, Inc. Fixed rate speech compression system and method
US7013268B1 (en) 2000-07-25 2006-03-14 Mindspeed Technologies, Inc. Method and apparatus for improved weighting filters in a CELP encoder
FR2813722B1 (fr) * 2000-09-05 2003-01-24 France Telecom Procede et dispositif de dissimulation d'erreurs et systeme de transmission comportant un tel dispositif
JP3558031B2 (ja) * 2000-11-06 2004-08-25 日本電気株式会社 音声復号化装置
US7505594B2 (en) * 2000-12-19 2009-03-17 Qualcomm Incorporated Discontinuous transmission (DTX) controller system and method
JP3404016B2 (ja) * 2000-12-26 2003-05-06 三菱電機株式会社 音声符号化装置及び音声符号化方法
JP3566220B2 (ja) * 2001-03-09 2004-09-15 三菱電機株式会社 音声符号化装置、音声符号化方法、音声復号化装置及び音声復号化方法
US6996522B2 (en) * 2001-03-13 2006-02-07 Industrial Technology Research Institute Celp-Based speech coding for fine grain scalability by altering sub-frame pitch-pulse
FI119955B (fi) * 2001-06-21 2009-05-15 Nokia Corp Menetelmä, kooderi ja laite puheenkoodaukseen synteesi-analyysi puhekoodereissa
US7133485B1 (en) * 2001-06-25 2006-11-07 Silicon Laboratories Inc. Feedback system incorporating slow digital switching for glitch-free state changes
DE10140507A1 (de) * 2001-08-17 2003-02-27 Philips Corp Intellectual Pty Verfahren für die algebraische Codebook-Suche eines Sprachsignalkodierers
ATE322069T1 (de) * 2002-08-08 2006-04-15 Cit Alcatel Verfahren zur signalkodierung mittels einer vektorquantisierung
US7698132B2 (en) * 2002-12-17 2010-04-13 Qualcomm Incorporated Sub-sampled excitation waveform codebooks
WO2004090864A2 (en) * 2003-03-12 2004-10-21 The Indian Institute Of Technology, Bombay Method and apparatus for the encoding and decoding of speech
KR100546758B1 (ko) * 2003-06-30 2006-01-26 한국전자통신연구원 음성의 상호부호화시 전송률 결정 장치 및 방법
US7792670B2 (en) * 2003-12-19 2010-09-07 Motorola, Inc. Method and apparatus for speech coding
PL3561810T3 (pl) * 2004-04-05 2023-09-04 Koninklijke Philips N.V. Sposób kodowania lewego i prawego sygnału wejściowego audio, odpowiedni koder, dekoder i produkt w postaci programu komputerowego
US7860710B2 (en) * 2004-09-22 2010-12-28 Texas Instruments Incorporated Methods, devices and systems for improved codebook search for voice codecs
SG123639A1 (en) * 2004-12-31 2006-07-26 St Microelectronics Asia A system and method for supporting dual speech codecs
US7571094B2 (en) * 2005-09-21 2009-08-04 Texas Instruments Incorporated Circuits, processes, devices and systems for codebook search reduction in speech coders
CN101371295B (zh) * 2006-01-18 2011-12-21 Lg电子株式会社 用于编码和解码信号的设备和方法
US7342460B2 (en) * 2006-01-30 2008-03-11 Silicon Laboratories Inc. Expanded pull range for a voltage controlled clock synthesizer
ES2390181T3 (es) * 2006-06-29 2012-11-07 Lg Electronics Inc. Procedimiento y aparato para procesar una señal de audio
US8010351B2 (en) * 2006-12-26 2011-08-30 Yang Gao Speech coding system to improve packet loss concealment
US8688437B2 (en) 2006-12-26 2014-04-01 Huawei Technologies Co., Ltd. Packet loss concealment for speech coding
KR101398836B1 (ko) * 2007-08-02 2014-05-26 삼성전자주식회사 스피치 코덱들의 고정 코드북들을 공통 모듈로 구현하는방법 및 장치
KR20100006492A (ko) 2008-07-09 2010-01-19 삼성전자주식회사 부호화 방식 결정 방법 및 장치
US7898763B2 (en) * 2009-01-13 2011-03-01 International Business Machines Corporation Servo pattern architecture to uncouple position error determination from linear position information
US8924207B2 (en) * 2009-07-23 2014-12-30 Texas Instruments Incorporated Method and apparatus for transcoding audio data
US8260220B2 (en) * 2009-09-28 2012-09-04 Broadcom Corporation Communication device with reduced noise speech coding
US9728200B2 (en) 2013-01-29 2017-08-08 Qualcomm Incorporated Systems, methods, apparatus, and computer-readable media for adaptive formant sharpening in linear prediction coding
BR112015031181A2 (pt) * 2013-06-21 2017-07-25 Fraunhofer Ges Forschung aparelho e método que realizam conceitos aperfeiçoados para tcx ltp
US20150025894A1 (en) * 2013-07-16 2015-01-22 Electronics And Telecommunications Research Institute Method for encoding and decoding of multi channel audio signal, encoder and decoder
US9418671B2 (en) 2013-08-15 2016-08-16 Huawei Technologies Co., Ltd. Adaptive high-pass post-filter

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4868867A (en) * 1987-04-06 1989-09-19 Voicecraft Inc. Vector excitation speech or audio coder for transmission or storage
US5701392A (en) 1990-02-23 1997-12-23 Universite De Sherbrooke Depth-first algebraic-codebook search for fast coding of speech
JP2841765B2 (ja) * 1990-07-13 1998-12-24 日本電気株式会社 適応ビット割当て方法及び装置
DE69129329T2 (de) * 1990-09-14 1998-09-24 Fujitsu Ltd Sprachkodierungsystem
JPH06138896A (ja) 1991-05-31 1994-05-20 Motorola Inc 音声フレームを符号化するための装置および方法
DE69309557T2 (de) 1992-06-29 1997-10-09 Nippon Telegraph & Telephone Verfahren und Vorrichtung zur Sprachkodierung
CA2108623A1 (en) 1992-11-02 1994-05-03 Yi-Sheng Wang Adaptive pitch pulse enhancer and method for use in a codebook excited linear prediction (celp) search loop
DE4330243A1 (de) * 1993-09-07 1995-03-09 Philips Patentverwaltung Sprachverarbeitungseinrichtung
FR2729245B1 (fr) 1995-01-06 1997-04-11 Lamblin Claude Procede de codage de parole a prediction lineaire et excitation par codes algebriques
CA2213909C (en) * 1996-08-26 2002-01-22 Nec Corporation High quality speech coder at low bit rates
GB9700776D0 (en) * 1997-01-15 1997-03-05 Philips Electronics Nv Method of,and apparatus for,processing low power pseudo-random code sequence signals
US6041297A (en) * 1997-03-10 2000-03-21 At&T Corp Vocoder for coding speech by using a correlation between spectral magnitudes and candidate excitations
US5970444A (en) * 1997-03-13 1999-10-19 Nippon Telegraph And Telephone Corporation Speech coding method
US5924062A (en) * 1997-07-01 1999-07-13 Nokia Mobile Phones ACLEP codec with modified autocorrelation matrix storage and search
JP3199020B2 (ja) * 1998-02-27 2001-08-13 日本電気株式会社 音声音楽信号の符号化装置および復号装置
JP3180762B2 (ja) * 1998-05-11 2001-06-25 日本電気株式会社 音声符号化装置及び音声復号化装置
US6014618A (en) * 1998-08-06 2000-01-11 Dsp Software Engineering, Inc. LPAS speech coder using vector quantized, multi-codebook, multi-tap pitch predictor and optimized ternary source excitation codebook derivation
US6173257B1 (en) * 1998-08-24 2001-01-09 Conexant Systems, Inc Completed fixed codebook for speech encoder
JP4173940B2 (ja) * 1999-03-05 2008-10-29 松下電器産業株式会社 音声符号化装置及び音声符号化方法

Also Published As

Publication number Publication date
CN1240049C (zh) 2006-02-01
WO2002025638A3 (en) 2002-06-13
AU2001287969A1 (en) 2002-04-02
EP1317753A2 (de) 2003-06-11
KR20030046451A (ko) 2003-06-12
EP1317753B1 (de) 2006-11-02
CN1457425A (zh) 2003-11-19
WO2002025638A2 (en) 2002-03-28
US6556966B1 (en) 2003-04-29
DE60124274T2 (de) 2007-06-21
ATE344519T1 (de) 2006-11-15

Similar Documents

Publication Publication Date Title
DE60124274D1 (de) Codebuchstruktur und suchverfahren für die sprachkodierung
DE60012760D1 (de) Multimodaler sprachkodierer
AU2005246538B2 (en) Supporting a switch between audio coder modes
CN101322181B (zh) 有效的语音流转换方法及装置
US6631139B2 (en) Method and apparatus for interoperability between voice transmission systems during speech inactivity
BR0115057A (pt) Método para encobrir os erros em um fluxo de bit codificado, sistema para codificar os sinais de voz e decodificar o fluxo de bit codificado, decodificador, estação móvel e elemento de rede
HK1132324A1 (en) Method and device for coding transition frames in speech signals
EP1748425A3 (de) Halbrätiger Vocoder
US7873513B2 (en) Speech transcoding in GSM networks
DK1879179T3 (da) Fremgangsmåde og anordning til kodning af audiodata baseret på vektorkvantisering
BRPI0409970A (pt) método e codificador para codificar um sinal de som amostrado, método e decodificador para decodificar um fluxo de bit representativo de um sinal de som amostrado, fluxo de bit representativo de um sinal de som amostrado, telefone celular, sistema de comunicação de fala, e, programa de computador
WO2005091273A2 (en) Method of comfort noise generation for speech communication
PL1756806T3 (pl) Sposób kwantyzacji kodera mowy o bardzo małej przepływności
DE60027140D1 (de) Sprachsynthetisierer auf der basis von sprachkodierung mit veränderlicher bit-rate
Choudhary et al. Study and performance of amr codecs for gsm
WO2002023533A3 (en) System for improved use of pitch enhancement with subcodebooks
Wang et al. Transcoding Scheme between AMR-WB and VMR-WB
KR0155332B1 (ko) 가변데이타 전송방식을 적용한 통신시스템에서의 데이터 전송방법
Xu et al. A Novel Transcoding Algorithm between 3GPP AMR-NB (7.95 kbit/s) and ITU-T G. 729a (8kbit/s)
CN101388211A (zh) 一种语音编解码过程中噪声整形的方法及装置
Shikui et al. Speech transcoding from AMR to G. 729 in excitation domain
CA2491623A1 (en) 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

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: HTC CORP., TAOYUAN, TW

8328 Change in the person/name/address of the agent

Representative=s name: 2K PATENTANWAELTE BLASBERG KEWITZ & REICHEL, PARTN