EP2710589A1 - Unité de codage redondant pour codec audio - Google Patents

Unité de codage redondant pour codec audio

Info

Publication number
EP2710589A1
EP2710589A1 EP11723805.5A EP11723805A EP2710589A1 EP 2710589 A1 EP2710589 A1 EP 2710589A1 EP 11723805 A EP11723805 A EP 11723805A EP 2710589 A1 EP2710589 A1 EP 2710589A1
Authority
EP
European Patent Office
Prior art keywords
signal
frequency band
source model
residual signal
quantization indices
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.)
Withdrawn
Application number
EP11723805.5A
Other languages
German (de)
English (en)
Inventor
Turaj ZAKIZADEH SHABESTARY
Jan Skoglund
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.)
Google LLC
Original Assignee
Google 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 Google LLC filed Critical Google LLC
Publication of EP2710589A1 publication Critical patent/EP2710589A1/fr
Withdrawn legal-status Critical Current

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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0204—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 spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
    • 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

Abstract

L'invention concerne un procédé de génération de multiples charges utiles codées selon des taux de codage différents pour inclusion dans un paquet de données transmis sur un réseau de données en paquets, consistant à extraire d'un modèle source représentant une enveloppe spectrale de signal d'entrée et un signal résiduel par filtrage du signal d'entrée au moyen de coefficients de filtrage dérivés du modèle source pour éliminer les effets de tonalité provenant du premier signal de bande de fréquence. Le modèle source et le modèle résiduel sont stockés. Lorsque la charge utile doit être codée selon un faible taux de codage, le modèle résiduel est mis à l'échelle au moyen d'un facteur de mise à l'échelle et quantifié. Le modèle résiduel mis à l'échelle et le modèle source peuvent être codés par entropie pour générer un flux binaire redondant. Ledit flux binaire redondant est utilisé pour générer des charges utiles pour des paquets transmis sur un réseau.
EP11723805.5A 2011-05-20 2011-05-20 Unité de codage redondant pour codec audio Withdrawn EP2710589A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2011/037336 WO2012161675A1 (fr) 2011-05-20 2011-05-20 Unité de codage redondant pour codec audio

Publications (1)

Publication Number Publication Date
EP2710589A1 true EP2710589A1 (fr) 2014-03-26

Family

ID=44626687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11723805.5A Withdrawn EP2710589A1 (fr) 2011-05-20 2011-05-20 Unité de codage redondant pour codec audio

Country Status (2)

Country Link
EP (1) EP2710589A1 (fr)
WO (1) WO2012161675A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2867892B1 (fr) 2012-06-28 2017-08-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Codage audio par prédiction linéaire utilisant une estimation de distribution de probabilité améliorée
EP2830058A1 (fr) * 2013-07-22 2015-01-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Codage audio en domaine de fréquence supportant la commutation de longueur de transformée
CN107369454B (zh) * 2014-03-21 2020-10-27 华为技术有限公司 语音频码流的解码方法及装置
CN112289327A (zh) * 2020-10-29 2021-01-29 北京百瑞互联技术有限公司 一种lc3音频编码器后置残差优化方法、装置和介质
CN113450808B (zh) * 2021-06-28 2024-03-15 杭州网易智企科技有限公司 音频码率确定方法、装置、存储介质及电子设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997031367A1 (fr) * 1996-02-26 1997-08-28 At & T Corp. Vocodeur multi-niveau a codage par transformee des signaux predictifs residuels et quantification sur modeles auditifs
US7177804B2 (en) * 2005-05-31 2007-02-13 Microsoft Corporation Sub-band voice codec with multi-stage codebooks and redundant coding
US7756350B2 (en) 2006-11-13 2010-07-13 Global Ip Solutions, Inc. Lossless encoding and decoding of digital data

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Service and System Aspects; Audio codec processing functions; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Transcoding functions (Release 6)", 7 June 2005 (2005-06-07), XP050909272, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Specs/2014-12/Rel-6/26_series/> [retrieved on 20050607] *
MAKINEN J ET AL: "AMR-WB+: a New Audio Coding Standard for 3rd Generation Mobile Audio Services", 2005 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING - 18-23 MARCH 2005 - PHILADELPHIA, PA, USA, IEEE, PISCATAWAY, NJ, vol. 2, 18 March 2005 (2005-03-18), pages 1109 - 1112, XP010790838, ISBN: 978-0-7803-8874-1, DOI: 10.1109/ICASSP.2005.1415603 *
See also references of WO2012161675A1 *
SJOBERG M WESTERLUND ERICSSON A LAKANIEMI S WENGER NOKIA J: "RTP Payload Format for the Extended Adaptive Multi-Rate Wideband (AMR-WB+) Audio Codec; rfc4352.txt", RTP PAYLOAD FORMAT FOR THE EXTENDED ADAPTIVE MULTI-RATE WIDEBAND (AMR-WB+) AUDIO CODEC; RFC4352.TXT, INTERNET ENGINEERING TASK FORCE, IETF; STANDARD, INTERNET SOCIETY (ISOC) 4, RUE DES FALAISES CH- 1205 GENEVA, SWITZERLAND, 1 January 2006 (2006-01-01), XP015044785 *

Also Published As

Publication number Publication date
WO2012161675A1 (fr) 2012-11-29

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