ES2157302T3 - Metodo de compensacion de borrado de bloques o perdida de paquetes. - Google Patents

Metodo de compensacion de borrado de bloques o perdida de paquetes.

Info

Publication number
ES2157302T3
ES2157302T3 ES95307017T ES95307017T ES2157302T3 ES 2157302 T3 ES2157302 T3 ES 2157302T3 ES 95307017 T ES95307017 T ES 95307017T ES 95307017 T ES95307017 T ES 95307017T ES 2157302 T3 ES2157302 T3 ES 2157302T3
Authority
ES
Spain
Prior art keywords
signal
excitation
objective
preprocessor
blocks
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
ES95307017T
Other languages
English (en)
Inventor
Juin-Hwey Chen
Craig Robert Watkins
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.)
AT&T Inc
Original Assignee
AT&T 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 AT&T Inc filed Critical AT&T Inc
Application granted granted Critical
Publication of ES2157302T3 publication Critical patent/ES2157302T3/es
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
    • G10L19/005—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
    • 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

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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

UN METODO Y UN APARATO PARA MEJORAR EL RENDIMIENTO DE SISTEMAS DE CODIFICACION EN PRESENCIA DE BORRADOS DE BLOQUES O PAQUETES PERDIDOS. LA SEÑAL CODIFICADA SE MODIFICA TRAS LA TRANSMISION PERO ANTES DE LA DECODIFICACION MEDIANTE UN PREPROCESADOR DECODIFICADOR. EL PREPROCESADOR RECONOCE QUE UN BLOQUE DADO HA SIDO ALTERADA Y MODIFICA LA SEÑAL CODIFICADA PARA QUE LA DECODIFICACION DE LA MISMA DE COMO RESULTADO UN RENDIMIENTO MEJORADO DEL SISTEMA CODIFICADOR. ESPECIFICAMENTE, EN BASE AL PROCESO DE DECODIFICACION Y A UNA SEÑAL OBJETIVO PREDETERMINADA, LA SEÑAL CODIFICADA ES MODIFICADA DE MODO QUE LA DECODIFICACION DE LA MISMA GENERE UN ACERCAMIENTO A LA SEÑAL OBJETIVO. EN UN PRIMER ASPECTO ILUSTRATIVO DE LA INVENCION, SE UTILIZA UN CODIFICADOR DE VOZ CELP Y LA SEÑAL OBJETIVO ES UNA SEÑAL DE EXCITACION COMPUESTA DE VECTORES DE EXCITACION QUE SOLO CONSTAN DE CEROS. EN ESTE CASO, LA PORCION DE LOS INDICIOS DE SEÑAL DE EXCITACION ALTERADA QUE IDENTIFICAN LOS FACTORES DE GANANCIA CORRESPONDIENTES SEFUERZAN A LOS VALORES QUE REPRESENTAN UN FACTOR DE POCA GANANCIA. EN UN SEGUNDO ASPECTO ILUSTRATIVO DE LA INVENCION, SE UTILIZA UN CODIFICADOR DE VOZ CELP Y LA SEÑAL OBJETIVO INCLUYE UNA EXTRAPOLACION DE LA SEÑAL DE EXCITACION REPRESENTADA POR LA SEÑAL CODIFICADA PARA UNO O MAS BLOQUES PREVIOS. EN ESTE CASO, EL PREPROCESADOR CODIFICA LA SEÑAL DE EXCITACION EXTRAPOLADA UTILIZANDO LAS MEJORES CORRESPONDENCIAS DEL LIBRO DE CODIGOS DISPONIBLES. EN AMBOS CASOS, SE MINIMIZA EL EFECTO DE LOS BLOQUES ALTERADOS EN LA SEÑAL DE VOZ RECONSTRUIDA.
ES95307017T 1994-10-14 1995-10-03 Metodo de compensacion de borrado de bloques o perdida de paquetes. Expired - Lifetime ES2157302T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/324,283 US5550543A (en) 1994-10-14 1994-10-14 Frame erasure or packet loss compensation method

Publications (1)

Publication Number Publication Date
ES2157302T3 true ES2157302T3 (es) 2001-08-16

Family

ID=23262912

Family Applications (1)

Application Number Title Priority Date Filing Date
ES95307017T Expired - Lifetime ES2157302T3 (es) 1994-10-14 1995-10-03 Metodo de compensacion de borrado de bloques o perdida de paquetes.

Country Status (9)

Country Link
US (1) US5550543A (es)
EP (1) EP0707308B1 (es)
JP (1) JP3241978B2 (es)
KR (1) KR960016291A (es)
AU (1) AU3313395A (es)
CA (1) CA2156000C (es)
DE (1) DE69521004T2 (es)
ES (1) ES2157302T3 (es)
MX (1) MX9504290A (es)

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US5715372A (en) * 1995-01-10 1998-02-03 Lucent Technologies Inc. Method and apparatus for characterizing an input signal
US5699485A (en) * 1995-06-07 1997-12-16 Lucent Technologies Inc. Pitch delay modification during frame erasures
US5774856A (en) * 1995-10-02 1998-06-30 Motorola, Inc. User-Customized, low bit-rate speech vocoding method and communication unit for use therewith
US5867814A (en) * 1995-11-17 1999-02-02 National Semiconductor Corporation Speech coder that utilizes correlation maximization to achieve fast excitation coding, and associated coding method
JP2838994B2 (ja) * 1995-12-27 1998-12-16 日本電気株式会社 データ信号受信装置
US6765904B1 (en) 1999-08-10 2004-07-20 Texas Instruments Incorporated Packet networks
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
US6205130B1 (en) * 1996-09-25 2001-03-20 Qualcomm Incorporated Method and apparatus for detecting bad data packets received by a mobile telephone using decoded speech parameters
EP0992981B1 (en) 1996-11-07 2001-11-28 Matsushita Electric Industrial Co., Ltd Excitation Method Generator and Excitation Vector Generating Method
EP0978172B1 (de) * 1997-04-23 2000-10-11 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Verfahren zum verschleiern von fehlern in einem audiodatenstrom
US5968182A (en) * 1997-05-12 1999-10-19 International Business Machines Corporation Method and means for utilizing device long busy response for resolving detected anomalies at the lowest level in a hierarchical, demand/response storage management subsystem
JP3206497B2 (ja) * 1997-06-16 2001-09-10 日本電気株式会社 インデックスによる信号生成型適応符号帳
US6148422A (en) * 1997-10-07 2000-11-14 Nortel Networks Limited Telecommunication network utilizing an error control protocol
JP3252782B2 (ja) * 1998-01-13 2002-02-04 日本電気株式会社 モデム信号対応音声符号化復号化装置
TW401699B (en) * 1998-04-01 2000-08-11 Koninkl Philips Electronics Nv A method and device for generating display frames from a sequence of source frames through synthesizing one or more intermediate frames exclusively from an immediately preceding source frame
US6775652B1 (en) 1998-06-30 2004-08-10 At&T Corp. Speech recognition over lossy transmission systems
US6757256B1 (en) 1999-08-10 2004-06-29 Texas Instruments Incorporated Process of sending packets of real-time information
US6801499B1 (en) * 1999-08-10 2004-10-05 Texas Instruments Incorporated Diversity schemes for packet communications
US6744757B1 (en) 1999-08-10 2004-06-01 Texas Instruments Incorporated Private branch exchange systems for packet communications
US6678267B1 (en) 1999-08-10 2004-01-13 Texas Instruments Incorporated Wireless telephone with excitation reconstruction of lost packet
US6801532B1 (en) * 1999-08-10 2004-10-05 Texas Instruments Incorporated Packet reconstruction processes for packet communications
US6804244B1 (en) 1999-08-10 2004-10-12 Texas Instruments Incorporated Integrated circuits for packet communications
US7574351B2 (en) * 1999-12-14 2009-08-11 Texas Instruments Incorporated Arranging CELP information of one frame in a second packet
US6570509B2 (en) * 2000-03-03 2003-05-27 Motorola, Inc. Method and system for encoding to mitigate decoding errors in a receiver
US6584438B1 (en) * 2000-04-24 2003-06-24 Qualcomm Incorporated Frame erasure compensation method in a variable rate speech coder
JP2002162998A (ja) * 2000-11-28 2002-06-07 Fujitsu Ltd パケット修復処理を伴なう音声符号化方法
EP1217613A1 (fr) * 2000-12-19 2002-06-26 Koninklijke Philips Electronics N.V. Reconstitution de trames manquantes ou mauvaises en téléphonie cellulaire
DE10124421C1 (de) * 2001-05-18 2002-10-17 Siemens Ag Verfahren zur Schätzung eines Codecparameters
US7143032B2 (en) * 2001-08-17 2006-11-28 Broadcom Corporation Method and system for an overlap-add technique for predictive decoding based on extrapolation of speech and ringinig waveform
US7711563B2 (en) * 2001-08-17 2010-05-04 Broadcom Corporation Method and system for frame erasure concealment for predictive speech coding based on extrapolation of speech waveform
KR100413039B1 (ko) * 2002-01-16 2003-12-31 어뮤즈텍(주) 피치보정방법 및 그 장치
US20040064308A1 (en) * 2002-09-30 2004-04-01 Intel Corporation Method and apparatus for speech packet loss recovery
KR100462024B1 (ko) * 2002-12-09 2004-12-17 한국전자통신연구원 부가 음성 데이터를 이용한 패킷 손실 복구 방법 및 이를이용한 송수신기
US20040122680A1 (en) * 2002-12-18 2004-06-24 Mcgowan James William Method and apparatus for providing coder independent packet replacement
US7411985B2 (en) * 2003-03-21 2008-08-12 Lucent Technologies Inc. Low-complexity packet loss concealment method for voice-over-IP speech transmission
US7379864B2 (en) * 2003-05-06 2008-05-27 Lucent Technologies Inc. Method and apparatus for the detection of previous packet loss in non-packetized speech
JP2006033356A (ja) * 2004-07-15 2006-02-02 Renesas Technology Corp 音声データ処理装置
US7519535B2 (en) * 2005-01-31 2009-04-14 Qualcomm Incorporated Frame erasure concealment in voice communications
US7930176B2 (en) 2005-05-20 2011-04-19 Broadcom Corporation Packet loss concealment for block-independent speech codecs
CA2633694A1 (en) 2005-12-21 2007-06-28 Nec Corporation Code conversion device, code conversion method used for the same, and program thereof
WO2007077841A1 (ja) * 2005-12-27 2007-07-12 Matsushita Electric Industrial Co., Ltd. 音声復号装置および音声復号方法
US8015000B2 (en) * 2006-08-03 2011-09-06 Broadcom Corporation Classification-based frame loss concealment for audio signals
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IT1257065B (it) * 1992-07-31 1996-01-05 Sip Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi.
US5450449A (en) * 1994-03-14 1995-09-12 At&T Ipm Corp. Linear prediction coefficient generation during frame erasure or packet loss
US5615298A (en) 1994-03-14 1997-03-25 Lucent Technologies Inc. Excitation signal synthesis during frame erasure or packet loss

Also Published As

Publication number Publication date
KR960016291A (ko) 1996-05-22
DE69521004D1 (de) 2001-06-28
JPH08227300A (ja) 1996-09-03
EP0707308A1 (en) 1996-04-17
CA2156000C (en) 1999-11-02
DE69521004T2 (de) 2001-11-29
AU3313395A (en) 1996-04-26
EP0707308B1 (en) 2001-05-23
JP3241978B2 (ja) 2001-12-25
CA2156000A1 (en) 1996-04-15
MX9504290A (es) 1997-01-31
US5550543A (en) 1996-08-27

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