WO2009057327A1 - 符号化装置および復号装置 - Google Patents

符号化装置および復号装置 Download PDF

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Publication number
WO2009057327A1
WO2009057327A1 PCT/JP2008/003151 JP2008003151W WO2009057327A1 WO 2009057327 A1 WO2009057327 A1 WO 2009057327A1 JP 2008003151 W JP2008003151 W JP 2008003151W WO 2009057327 A1 WO2009057327 A1 WO 2009057327A1
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WO
WIPO (PCT)
Prior art keywords
icp
reference signal
band portion
frequency coefficient
candidates
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PCT/JP2008/003151
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English (en)
French (fr)
Inventor
Haishan Zhong
Zongxian Liu
Kok Seng Chong
Koji Yoshida
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Panasonic Corporation
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Filing date
Publication date
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Priority to US12/740,020 priority Critical patent/US8374883B2/en
Priority to CN2008801137288A priority patent/CN101842832B/zh
Priority to EP08845514.2A priority patent/EP2209114B1/en
Priority to JP2009538954A priority patent/JP5413839B2/ja
Publication of WO2009057327A1 publication Critical patent/WO2009057327A1/ja

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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 OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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

Abstract

　チャネル間予測（ＩＣＰ）を用いたスケーラブルなステレオ音声符号化において、ＩＣＰの予測性能を改善する符号化装置。この符号化装置では、ＩＣＰ分析部（１１３、１１４、１１５）は、それぞれ、サイド残差信号の低帯域部分の周波数係数ｓＬ'（ｆ）、モノラル残差信号の各サブ帯域部分の周波数係数ｍＭ、ｉ（ｆ）、モノラル残差信号の低帯域部分の周波数係数ｍＬ（ｆ）を基準信号候補として、これとサイド残差信号の各サブ帯域部分の周波数係数ｓＭ、ｉ（ｆ）とのＩＣＰ分析を行い、第１、第２、第３ＩＣＰ係数を生成する。選択部（１１６）は、各基準信号候補とサイド残差信号の各サブ帯域部分の周波数係数ｓＭ、ｉ（ｆ）との関係をチェックすることによって、基準信号候補の中から最適な基準信号を選択し、選択した基準信号を示す基準信号ＩＤ及び基準信号に対応するＩＣＰ係数をＩＣＰパラメータ量子化部（１１７）に出力する。
PCT/JP2008/003151 2007-10-31 2008-10-31 符号化装置および復号装置 WO2009057327A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/740,020 US8374883B2 (en) 2007-10-31 2008-10-31 Encoder and decoder using inter channel prediction based on optimally determined signals
CN2008801137288A CN101842832B (zh) 2007-10-31 2008-10-31 编码装置和解码装置
EP08845514.2A EP2209114B1 (en) 2007-10-31 2008-10-31 Speech coding/decoding apparatus/method
JP2009538954A JP5413839B2 (ja) 2007-10-31 2008-10-31 符号化装置および復号装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-284622 2007-10-31
JP2007284622 2007-10-31

Publications (1)

Publication Number Publication Date
WO2009057327A1 true WO2009057327A1 (ja) 2009-05-07

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PCT/JP2008/003151 WO2009057327A1 (ja) 2007-10-31 2008-10-31 符号化装置および復号装置

Country Status (5)

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US (1) US8374883B2 (ja)
EP (1) EP2209114B1 (ja)
JP (1) JP5413839B2 (ja)
CN (1) CN101842832B (ja)
WO (1) WO2009057327A1 (ja)

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TWI618051B (zh) * 2013-02-14 2018-03-11 杜比實驗室特許公司 用於利用估計之空間參數的音頻訊號增強的音頻訊號處理方法及裝置
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TWI618050B (zh) 2013-02-14 2018-03-11 杜比實驗室特許公司 用於音訊處理系統中之訊號去相關的方法及設備
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EP2427881A4 (en) * 2009-05-08 2016-04-20 Nokia Technologies Oy MULTICANAL AUDIO PROCESSING
US10885922B2 (en) 2017-07-03 2021-01-05 Qualcomm Incorporated Time-domain inter-channel prediction

Also Published As

Publication number Publication date
JP5413839B2 (ja) 2014-02-12
JPWO2009057327A1 (ja) 2011-03-10
EP2209114A1 (en) 2010-07-21
US20100250244A1 (en) 2010-09-30
CN101842832B (zh) 2012-11-07
EP2209114B1 (en) 2014-05-14
EP2209114A4 (en) 2011-09-28
CN101842832A (zh) 2010-09-22
US8374883B2 (en) 2013-02-12

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