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WO2009057329A1 - 符号化装置、復号装置およびこれらの方法 - Google Patents

符号化装置、復号装置およびこれらの方法 Download PDF

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Publication number
WO2009057329A1
WO2009057329A1 PCT/JP2008/003166 JP2008003166W WO2009057329A1 WO 2009057329 A1 WO2009057329 A1 WO 2009057329A1 JP 2008003166 W JP2008003166 W JP 2008003166W WO 2009057329 A1 WO2009057329 A1 WO 2009057329A1
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Prior art keywords
signal
sound source
inverse
source signal
encoding device
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Ceased
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PCT/JP2008/003166
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English (en)
French (fr)
Inventor
Kok Seng Chong
Koji Yoshida
Masahiro Oshikiri
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Panasonic Corp
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Panasonic Corp
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Priority to JP2009538955A priority Critical patent/JP5404412B2/ja
Priority to EP08843869A priority patent/EP2214163A4/en
Priority to US12/740,727 priority patent/US8352249B2/en
Publication of WO2009057329A1 publication Critical patent/WO2009057329A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • G10L19/02—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
    • G10L19/0208—Subband vocoders
    • 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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (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)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

　低ビットレートのままで、ステレオ信号の音質を改善する符号化装置。この符号化装置では、ＬＰ逆フィルタ（１２１）は、モノラル信号の逆量子化線形予測係数ＡｄＭ（ｚ）を用いて左信号Ｌ（ｎ）をＬＰ逆フィルタリングする。Ｔ／Ｆ変換部（１２２）は、左音源信号Ｌｅ（ｎ）を、時間領域から周波数領域に変換する。逆量子化器（１２３）は、符号化情報Ｍｑｅを逆量子化する。スペクトル分割部（１２４、１２５）は、音源信号Ｍｄｅ（ｆ）および左信号Ｌｅ（ｆ）の高周波数部分を複数の帯域に分割する。スケールファクタ算出部（１２６、１２７）は、それぞれ、分割された各帯域のモノラル音源信号Ｍｄｅｈ，ｉ（ｆ）と左音源信号Ｌｅｈ，ｉ（ｆ）、及び、Ｍｄｅｈ，ｉ（ｆ）と右音源信号Ｒｅｈ，ｉ（ｆ）を用いて、スケールファクタαｉ及びβｉを計算する。
PCT/JP2008/003166 2007-11-01 2008-11-04 符号化装置、復号装置およびこれらの方法 Ceased WO2009057329A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2009538955A JP5404412B2 (ja) 2007-11-01 2008-11-04 符号化装置、復号装置およびこれらの方法
EP08843869A EP2214163A4 (en) 2007-11-01 2008-11-04 ENCODING DEVICE, DECODING DEVICE, AND METHOD THEREOF
US12/740,727 US8352249B2 (en) 2007-11-01 2008-11-04 Encoding device, decoding device, and method thereof

Applications Claiming Priority (2)

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JP2007285607 2007-11-01
JP2007-285607 2007-11-01

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WO2009057329A1 true WO2009057329A1 (ja) 2009-05-07

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US (1) US8352249B2 (ja)
EP (1) EP2214163A4 (ja)
JP (1) JP5404412B2 (ja)
WO (1) WO2009057329A1 (ja)

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JP5850216B2 (ja) 2010-04-13 2016-02-03 ソニー株式会社 信号処理装置および方法、符号化装置および方法、復号装置および方法、並びにプログラム
JP5609737B2 (ja) 2010-04-13 2014-10-22 ソニー株式会社 信号処理装置および方法、符号化装置および方法、復号装置および方法、並びにプログラム
JP6075743B2 (ja) 2010-08-03 2017-02-08 ソニー株式会社 信号処理装置および方法、並びにプログラム
JP5707842B2 (ja) 2010-10-15 2015-04-30 ソニー株式会社 符号化装置および方法、復号装置および方法、並びにプログラム
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JP6179122B2 (ja) * 2013-02-20 2017-08-16 富士通株式会社 オーディオ符号化装置、オーディオ符号化方法、オーディオ符号化プログラム
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Also Published As

Publication number Publication date
US8352249B2 (en) 2013-01-08
JP5404412B2 (ja) 2014-01-29
JPWO2009057329A1 (ja) 2011-03-10
US20100262421A1 (en) 2010-10-14
EP2214163A1 (en) 2010-08-04
EP2214163A4 (en) 2011-10-05

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