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
Links
- 238000000034 method Methods 0.000 title abstract 3
- 230000005284 excitation Effects 0.000 abstract 5
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 238000013213 extrapolation Methods 0.000 abstract 1
- 239000013598 vector Substances 0.000 abstract 1
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.
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) |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5680506A (en) * | 1994-12-29 | 1997-10-21 | Lucent Technologies Inc. | Apparatus and method for speech signal analysis |
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 |
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 |
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 |
WO1998020483A1 (fr) * | 1996-11-07 | 1998-05-14 | Matsushita Electric Industrial Co., Ltd. | Generateur de vecteur de source sonore, codeur et decodeur vocal |
CA2276202C (en) * | 1997-04-23 | 2000-12-19 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Methods for concealing errors in an audio data stream |
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 |
US6801532B1 (en) * | 1999-08-10 | 2004-10-05 | Texas Instruments Incorporated | Packet reconstruction processes for packet communications |
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 |
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 |
JP4983606B2 (ja) | 2005-12-21 | 2012-07-25 | 日本電気株式会社 | 符号変換装置及びそれに用いる符号変換方法並びにそのプログラム |
JP5142727B2 (ja) * | 2005-12-27 | 2013-02-13 | パナソニック株式会社 | 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 |
US8280728B2 (en) * | 2006-08-11 | 2012-10-02 | Broadcom Corporation | Packet loss concealment for a sub-band predictive coder based on extrapolation of excitation waveform |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4375581A (en) * | 1980-06-30 | 1983-03-01 | Bell Telephone Laboratories, Incorporated | Digital transmission error reduction |
GB9008145D0 (en) * | 1989-05-31 | 1990-06-06 | Ibm | Microcomputer system employing address offset mechanism to increase the supported cache memory capacity |
US5233660A (en) * | 1991-09-10 | 1993-08-03 | At&T Bell Laboratories | Method and apparatus for low-delay celp speech coding and decoding |
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 |
-
1994
- 1994-10-14 US US08/324,283 patent/US5550543A/en not_active Expired - Lifetime
-
1995
- 1995-08-14 CA CA002156000A patent/CA2156000C/en not_active Expired - Lifetime
- 1995-10-03 EP EP95307017A patent/EP0707308B1/en not_active Expired - Lifetime
- 1995-10-03 DE DE69521004T patent/DE69521004T2/de not_active Expired - Lifetime
- 1995-10-03 ES ES95307017T patent/ES2157302T3/es not_active Expired - Lifetime
- 1995-10-09 AU AU33133/95A patent/AU3313395A/en not_active Abandoned
- 1995-10-10 MX MX9504290A patent/MX9504290A/es unknown
- 1995-10-13 JP JP29063795A patent/JP3241978B2/ja not_active Expired - Lifetime
- 1995-10-13 KR KR1019950035719A patent/KR960016291A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP0707308B1 (en) | 2001-05-23 |
JP3241978B2 (ja) | 2001-12-25 |
CA2156000A1 (en) | 1996-04-15 |
DE69521004D1 (de) | 2001-06-28 |
EP0707308A1 (en) | 1996-04-17 |
US5550543A (en) | 1996-08-27 |
DE69521004T2 (de) | 2001-11-29 |
MX9504290A (es) | 1997-01-31 |
CA2156000C (en) | 1999-11-02 |
AU3313395A (en) | 1996-04-26 |
JPH08227300A (ja) | 1996-09-03 |
KR960016291A (ko) | 1996-05-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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