BRPI0516376A - dispositivo de codificação de som e método de codificação de som - Google Patents

dispositivo de codificação de som e método de codificação de som

Info

Publication number
BRPI0516376A
BRPI0516376A BRPI0516376-5A BRPI0516376A BRPI0516376A BR PI0516376 A BRPI0516376 A BR PI0516376A BR PI0516376 A BRPI0516376 A BR PI0516376A BR PI0516376 A BRPI0516376 A BR PI0516376A
Authority
BR
Brazil
Prior art keywords
signal
sound
channel prediction
monaural
monophonic
Prior art date
Application number
BRPI0516376-5A
Other languages
English (en)
Inventor
Koji Yoshida
Michiyo Goto
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of BRPI0516376A publication Critical patent/BRPI0516376A/pt

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
    • 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)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mathematical Physics (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

DISPOSITIVO DE CODIFICAçãO DE SOM E MéTODO DE CODIFICAçãO DE SOM. A presente invenção refere-se a um dispositivo de codificação de som tendo uma estrutura escalonável monofónico/estéreo e capaz de codificar eficientemente som estéreo mesmo quando a correlação entre os sinais de canais de um sinal estéreo é pequena. Em um bloco de codificação de camada de núcleo (110) desse dispositivo, uma seção de geração de sinal monofónico (III) gera um sinal monofónico do sinal de som de primeiro e segundo canal, uma seção de codificação de sinal monofónico (112) codifica o sinal monofónico e uma seção de decodificação de sinal monofónico (113) maior do que um sinal monofónico decodificado dos dados codificados de sinais monofónicos e entrega o mesmo para um bloco de codificação de camada de expansão (120). No bloco de codificação de camada de expansão (120), uma seção de sintetização de sinal de predição de primeiro canal (122) sintetiza um sinal de predição de primeiro canal do sinal monofónico decodificado e um parâmetro de digitalização de filtro de predição de primeiro canal e uma seção de sintetização de sinal de predição de segundo canal (126) sintetiza um sinal de predição de segundo canal do sinal monofónico decodificado e o parâmetro de digitalização de filtro de predição de segundo canal.
BRPI0516376-5A 2004-12-27 2005-12-26 dispositivo de codificação de som e método de codificação de som BRPI0516376A (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2004377965 2004-12-27
JP2005237716 2005-08-18
PCT/JP2005/023802 WO2006070751A1 (ja) 2004-12-27 2005-12-26 音声符号化装置および音声符号化方法

Publications (1)

Publication Number Publication Date
BRPI0516376A true BRPI0516376A (pt) 2008-09-02

Family

ID=36614868

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0516376-5A BRPI0516376A (pt) 2004-12-27 2005-12-26 dispositivo de codificação de som e método de codificação de som

Country Status (8)

Country Link
US (1) US7945447B2 (pt)
EP (1) EP1818911B1 (pt)
JP (1) JP5046652B2 (pt)
KR (1) KR20070092240A (pt)
CN (1) CN101091208B (pt)
AT (1) ATE545131T1 (pt)
BR (1) BRPI0516376A (pt)
WO (1) WO2006070751A1 (pt)

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Also Published As

Publication number Publication date
EP1818911A4 (en) 2008-03-19
US7945447B2 (en) 2011-05-17
EP1818911B1 (en) 2012-02-08
WO2006070751A1 (ja) 2006-07-06
ATE545131T1 (de) 2012-02-15
CN101091208A (zh) 2007-12-19
KR20070092240A (ko) 2007-09-12
EP1818911A1 (en) 2007-08-15
CN101091208B (zh) 2011-07-13
US20080010072A1 (en) 2008-01-10
JP5046652B2 (ja) 2012-10-10
JPWO2006070751A1 (ja) 2008-06-12

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Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]
B15K Others concerning applications: alteration of classification

Ipc: G10L 19/008 (2013.01), G10L 19/24 (2013.01)