BR9405445A - Aparelho codificador e decodificador de sinal apropriado para codificar um sinal de entrada e decodificar um sinal codificado, suporte de gravação onde sinais codificados são gravados, e processo de codificação e de decodificação de sinal para codificar um sinal de entrada e decodificar um sinal codificado. - Google Patents

Aparelho codificador e decodificador de sinal apropriado para codificar um sinal de entrada e decodificar um sinal codificado, suporte de gravação onde sinais codificados são gravados, e processo de codificação e de decodificação de sinal para codificar um sinal de entrada e decodificar um sinal codificado.

Info

Publication number
BR9405445A
BR9405445A BR9405445-2A BR9405445A BR9405445A BR 9405445 A BR9405445 A BR 9405445A BR 9405445 A BR9405445 A BR 9405445A BR 9405445 A BR9405445 A BR 9405445A
Authority
BR
Brazil
Prior art keywords
signal
encoding
encoded
decoding
characteristic
Prior art date
Application number
BR9405445-2A
Other languages
English (en)
Inventor
Kyoya Tsutsui
Mito Sonohara
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of BR9405445A publication Critical patent/BR9405445A/pt

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • 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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • 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
    • G10L19/002—Dynamic bit allocation
    • 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
    • G10L19/012—Comfort noise or silence coding
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H04B1/667—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a division in frequency subbands
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

Patente de Invenção "APARELHO CODIFICADOR E DECODIFICADOR DE SINAL APROPRIADO PARA CODIFICAR UM SINAL DE ENTRADA E DECODIFICAR UM SINAL CODIFICADO, SUPORTE DE GRAVAçãO ONDE SINAIS CODIFICADOS SãO GRAVADOS, E PROCESSO DE CODIFICAçãO E DE DECODIFICAçãO DE SINAL PARA CODIFICAR UM SINAL DE ENTRADA E DECODIFICAR UM SINAL CODIFICADO". Um aparelho codificador de sinais para codificar um sinal acústico. Este aparelho codificador de sinais inclui um circuito de transformação para transformar um sinal acústico de entrada em componentes de freq³ência, um circuito separador de componentes de sinal para separar uma saída do circuito de transformação em componentes característicos de tonalidade e componentes características de ruído, um circuito codificador de características de tonalidade para codificar um sinal de componentes características de tonalidade, e um circuito codificador de componentes característicos de ruído para decodificar um sinal de componentes característicos de ruído, no qual o circuito codificador de componentes característicos de ruído codifica respectivos componentes de sinal do sinal de componentes característicos de tonalidade para que eles tenham respectivamente diferentes comprimentos de código para dessa maneira aperfeiçoar a eficiência de codificação sem degradar a qualidade de som com respeito ao sinal acústico de tonalidade característica.
BR9405445-2A 1993-06-30 1994-06-29 Aparelho codificador e decodificador de sinal apropriado para codificar um sinal de entrada e decodificar um sinal codificado, suporte de gravação onde sinais codificados são gravados, e processo de codificação e de decodificação de sinal para codificar um sinal de entrada e decodificar um sinal codificado. BR9405445A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP18332293 1993-06-30
PCT/JP1994/001056 WO1995001680A1 (en) 1993-06-30 1994-06-29 Digital signal encoding device, its decoding device, and its recording medium

Publications (1)

Publication Number Publication Date
BR9405445A true BR9405445A (pt) 1999-09-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
BR9405445-2A BR9405445A (pt) 1993-06-30 1994-06-29 Aparelho codificador e decodificador de sinal apropriado para codificar um sinal de entrada e decodificar um sinal codificado, suporte de gravação onde sinais codificados são gravados, e processo de codificação e de decodificação de sinal para codificar um sinal de entrada e decodificar um sinal codificado.

Country Status (10)

Country Link
US (1) US5765126A (pt)
EP (2) EP0663739B1 (pt)
JP (1) JP3721582B2 (pt)
KR (1) KR100368854B1 (pt)
CN (2) CN1099777C (pt)
BR (1) BR9405445A (pt)
DE (2) DE69428030T2 (pt)
PL (2) PL173718B1 (pt)
RU (1) RU2131169C1 (pt)
WO (1) WO1995001680A1 (pt)

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KR0150955B1 (ko) * 1992-05-27 1998-10-15 강진구 비트고정을 위한 영상압축방법과 신장방법 및 그 장치
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JP3186290B2 (ja) * 1993-01-20 2001-07-11 ソニー株式会社 符号化方法、符号化装置、復号化装置及び記録媒体
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JP3186413B2 (ja) * 1994-04-01 2001-07-11 ソニー株式会社 データ圧縮符号化方法、データ圧縮符号化装置及びデータ記録媒体

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KR950703231A (ko) 1995-08-23
CN1440144A (zh) 2003-09-03
EP1083674B1 (en) 2003-04-16
KR100368854B1 (ko) 2003-05-17
US5765126A (en) 1998-06-09
EP0663739B1 (en) 2001-08-22
PL174314B1 (pl) 1998-07-31
DE69432538T2 (de) 2004-04-01
DE69432538D1 (de) 2003-05-22
CN1113096A (zh) 1995-12-06
CN1099777C (zh) 2003-01-22
DE69428030T2 (de) 2002-05-29
DE69428030D1 (de) 2001-09-27
JP3721582B2 (ja) 2005-11-30
EP1083674A2 (en) 2001-03-14
EP0663739A1 (en) 1995-07-19
EP0663739A4 (en) 1998-09-09
WO1995001680A1 (en) 1995-01-12
CN1217502C (zh) 2005-08-31
EP1083674A3 (en) 2001-04-11
RU2131169C1 (ru) 1999-05-27
PL173718B1 (pl) 1998-04-30
PL307740A1 (en) 1995-06-12

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