WO2006091150B1 - Lissage par filtre ameliore dans le codage et/ou le decodage audio multicanaux - Google Patents

Lissage par filtre ameliore dans le codage et/ou le decodage audio multicanaux

Info

Publication number
WO2006091150B1
WO2006091150B1 PCT/SE2006/000234 SE2006000234W WO2006091150B1 WO 2006091150 B1 WO2006091150 B1 WO 2006091150B1 SE 2006000234 W SE2006000234 W SE 2006000234W WO 2006091150 B1 WO2006091150 B1 WO 2006091150B1
Authority
WO
WIPO (PCT)
Prior art keywords
encoding
filter
signal
smoothing
performance
Prior art date
Application number
PCT/SE2006/000234
Other languages
English (en)
Other versions
WO2006091150A1 (fr
Inventor
Anisse Taleb
Stefan Andersson
Original Assignee
Ericsson Telefon Ab L M
Anisse Taleb
Stefan Andersson
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
Priority claimed from PCT/SE2005/002033 external-priority patent/WO2006091139A1/fr
Application filed by Ericsson Telefon Ab L M, Anisse Taleb, Stefan Andersson filed Critical Ericsson Telefon Ab L M
Priority to ES06716924T priority Critical patent/ES2389499T3/es
Priority to CN2006800056513A priority patent/CN101128867B/zh
Priority to EP06716924A priority patent/EP1851759B1/fr
Publication of WO2006091150A1 publication Critical patent/WO2006091150A1/fr
Publication of WO2006091150B1 publication Critical patent/WO2006091150B1/fr

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
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • 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
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Une première représentation de signal d'un ou de plusieurs des canaux multiples est codée (S1) dans un premier processus de codage et une seconde représentation de signal d'un ou de plusieurs canaux multiples est codée (S2) dans un second processus de codage par filtre. Le lissage par filtre peut être utilisé pour réduire les effets d'artefacts de codage. Cependant, un lissage par filtre classique conduit généralement à une réduction relativement élevée du rendement et par conséquent n'est pas utilisé largement. Il a été reconnu que les artefacts de codage sont perçus comme étant plus gênants que la réduction temporaire de la largeur stéréophonique et qu'ils sont particulièrement gênants lorsque le filtre de codage fournit une mauvaise estimation du signal cible, les artefacts étant d'autant plus gênants que l'estimation est mauvaise. Par conséquent, un lissage par filtre adaptatif en signal (S3) est introduit dans le second processus de codage ou un processus de décodage correspondant est introduit comme nouveau concept général permettant de résoudre les problèmes de l'état de la technique.
PCT/SE2006/000234 2005-02-23 2006-02-22 Lissage par filtre ameliore dans le codage et/ou le decodage audio multicanaux WO2006091150A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES06716924T ES2389499T3 (es) 2005-02-23 2006-02-22 Alisamiento mejorado de filtros en codificación y/o descodificación de audio multi-canal
CN2006800056513A CN101128867B (zh) 2005-02-23 2006-02-22 多声道音频编码和/或解码中改进的滤波器平滑
EP06716924A EP1851759B1 (fr) 2005-02-23 2006-02-22 Lissage par filtre ameliore dans le codage et/ou le decodage audio multicanaux

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US65495605P 2005-02-23 2005-02-23
US60/654956 2005-02-23
SEPCT/SE2005/002033 2005-12-22
PCT/SE2005/002033 WO2006091139A1 (fr) 2005-02-23 2005-12-22 Attribution adaptative de bits pour le codage audio a canaux multiples

Publications (2)

Publication Number Publication Date
WO2006091150A1 WO2006091150A1 (fr) 2006-08-31
WO2006091150B1 true WO2006091150B1 (fr) 2006-12-14

Family

ID=36927692

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/SE2006/000234 WO2006091150A1 (fr) 2005-02-23 2006-02-22 Lissage par filtre ameliore dans le codage et/ou le decodage audio multicanaux
PCT/SE2006/000235 WO2006091151A1 (fr) 2005-02-23 2006-02-22 Fidelite optimisee et signalisation reduite dans le codage audio multicanaux

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/SE2006/000235 WO2006091151A1 (fr) 2005-02-23 2006-02-22 Fidelite optimisee et signalisation reduite dans le codage audio multicanaux

Country Status (3)

Country Link
US (1) US9626973B2 (fr)
EP (2) EP1856688B1 (fr)
WO (2) WO2006091150A1 (fr)

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Also Published As

Publication number Publication date
WO2006091151A1 (fr) 2006-08-31
EP1851759A1 (fr) 2007-11-07
EP1851759A4 (fr) 2010-08-25
EP1851759B1 (fr) 2012-06-20
EP1856688B1 (fr) 2011-07-27
US9626973B2 (en) 2017-04-18
EP1856688A4 (fr) 2010-07-28
WO2006091151B1 (fr) 2006-12-14
EP1856688A1 (fr) 2007-11-21
US20080262850A1 (en) 2008-10-23
WO2006091150A1 (fr) 2006-08-31

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