BRPI0517513A - aparelho de codificação de som e processo de sua realização - Google Patents

aparelho de codificação de som e processo de sua realização

Info

Publication number
BRPI0517513A
BRPI0517513A BRPI0517513-5A BRPI0517513A BRPI0517513A BR PI0517513 A BRPI0517513 A BR PI0517513A BR PI0517513 A BRPI0517513 A BR PI0517513A BR PI0517513 A BRPI0517513 A BR PI0517513A
Authority
BR
Brazil
Prior art keywords
section
analysis
window
mdct
signal
Prior art date
Application number
BRPI0517513-5A
Other languages
English (en)
Inventor
Masahiro Oshikiri
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 BRPI0517513A publication Critical patent/BRPI0517513A/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
    • G10L19/02—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
    • G10L19/0212—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 orthogonal transformation
    • 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
    • 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
    • G10L19/02—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
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

APARELHO DE CODIFICAçãO DE SOM E PROCESSO DE SUA REALIZAçãO. A presente invenção refere-se a um dispositivo de codificação de som habilitando o grau de retardo a ser mantido pequeno e a distorção entre quadros a ser mitigada. No dispositivo de codificação de som, uma parte de multiplicação de janela (211) de uma seção de análise longa (21) multiplica um sinal de quadro de análise longa de duração de análise M1 por uma janela de análise, o sinal resultante multiplicado pela janela de análise é emitido para uma seção MDCT (212) e a seção MDCT (212) realiza o MDCT do sinal de entrada para obter os coeficientes de transformação do quadro de análise longa e sua emissão para uma seção codificadora de coeficiente de transformação (30). A parte de multiplicação de janela (221) de uma seção de análise curta (22) multiplica um sinal de quadro de análise curta de duração de análise M2 (M2<MI) por uma janela de análise e o sinal resultante multiplicado pela janela de análise é emitido para a seção MDCT (222). A seção MDCT (222) realiza o MDCT do sinal de entrada para obter os coeficientes de transformação do quadro de análise curta e o emite para a seção codificadora de coeficiente de transformação (30). Uma seção codificadora de coeficiente de transformação (30) codifica estes coeficientes de transformação e os emite.
BRPI0517513-5A 2004-10-26 2005-10-25 aparelho de codificação de som e processo de sua realização BRPI0517513A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004311143 2004-10-26
PCT/JP2005/019578 WO2006046546A1 (ja) 2004-10-26 2005-10-25 音声符号化装置および音声符号化方法

Publications (1)

Publication Number Publication Date
BRPI0517513A true BRPI0517513A (pt) 2008-10-14

Family

ID=36227786

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0517513-5A BRPI0517513A (pt) 2004-10-26 2005-10-25 aparelho de codificação de som e processo de sua realização

Country Status (8)

Country Link
US (1) US8326606B2 (pt)
EP (1) EP1793372B1 (pt)
JP (1) JP5100124B2 (pt)
KR (1) KR20070068424A (pt)
CN (1) CN101061533B (pt)
AT (1) ATE537536T1 (pt)
BR (1) BRPI0517513A (pt)
WO (1) WO2006046546A1 (pt)

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KR20140075466A (ko) * 2012-12-11 2014-06-19 삼성전자주식회사 오디오 신호의 인코딩 및 디코딩 방법, 및 오디오 신호의 인코딩 및 디코딩 장치
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Also Published As

Publication number Publication date
EP1793372B1 (en) 2011-12-14
US8326606B2 (en) 2012-12-04
CN101061533A (zh) 2007-10-24
EP1793372A1 (en) 2007-06-06
ATE537536T1 (de) 2011-12-15
KR20070068424A (ko) 2007-06-29
JPWO2006046546A1 (ja) 2008-05-22
JP5100124B2 (ja) 2012-12-19
WO2006046546A1 (ja) 2006-05-04
US20080065373A1 (en) 2008-03-13
CN101061533B (zh) 2011-05-18
EP1793372A4 (en) 2008-01-23

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Legal Events

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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]