WO2009001874A1 - オーディオ符号化方法、オーディオ復号方法、オーディオ符号化装置、オーディオ復号装置、プログラム、およびオーディオ符号化・復号システム - Google Patents

オーディオ符号化方法、オーディオ復号方法、オーディオ符号化装置、オーディオ復号装置、プログラム、およびオーディオ符号化・復号システム Download PDF

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Publication number
WO2009001874A1
WO2009001874A1 PCT/JP2008/061580 JP2008061580W WO2009001874A1 WO 2009001874 A1 WO2009001874 A1 WO 2009001874A1 JP 2008061580 W JP2008061580 W JP 2008061580W WO 2009001874 A1 WO2009001874 A1 WO 2009001874A1
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audio
decoding
audio encoding
gain
encoding
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PCT/JP2008/061580
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English (en)
French (fr)
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Osamu Shimada
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NEC Corp
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NEC Corp
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Priority to EP08777596.1A priority Critical patent/EP2159790B1/en
Priority to JP2009520622A priority patent/JP5434592B2/ja
Priority to US12/452,213 priority patent/US8788264B2/en
Publication of WO2009001874A1 publication Critical patent/WO2009001874A1/ja
Anticipated expiration legal-status Critical
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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
    • G10L19/02—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
    • G10L19/02—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
    • G10L19/032—Quantisation or dequantisation of spectral components

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

Abstract

　オーディオ符号化装置(1A)において、任意のフレームで算出した初期ゲイン情報を、保持しておいた過去フレームのゲイン情報をもとに修正し、当該フレームで使用するゲイン情報を算出し、算出したゲイン情報は、過去フレームのゲイン情報からの差分として符号化する。オーディオ復号装置(3A)において、差分ゲインを受け、過去のフレームで使用したゲインに基づいて任意のフレームのゲインを算出して復号オーディオ信号を生成する。
PCT/JP2008/061580 2007-06-27 2008-06-25 オーディオ符号化方法、オーディオ復号方法、オーディオ符号化装置、オーディオ復号装置、プログラム、およびオーディオ符号化・復号システム Ceased WO2009001874A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08777596.1A EP2159790B1 (en) 2007-06-27 2008-06-25 Audio encoding method, audio decoding method, audio encoding device, audio decoding device, program, and audio encoding/decoding system
JP2009520622A JP5434592B2 (ja) 2007-06-27 2008-06-25 オーディオ符号化方法、オーディオ復号方法、オーディオ符号化装置、オーディオ復号装置、プログラム、およびオーディオ符号化・復号システム
US12/452,213 US8788264B2 (en) 2007-06-27 2008-06-25 Audio encoding method, audio decoding method, audio encoding device, audio decoding device, program, and audio encoding/decoding system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-169058 2007-06-27
JP2007169058 2007-06-27

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WO2009001874A1 true WO2009001874A1 (ja) 2008-12-31

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US (1) US8788264B2 (ja)
EP (1) EP2159790B1 (ja)
JP (1) JP5434592B2 (ja)
WO (1) WO2009001874A1 (ja)

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JP5434592B2 (ja) 2014-03-05
EP2159790A4 (en) 2016-04-06
EP2159790A1 (en) 2010-03-03
JPWO2009001874A1 (ja) 2010-08-26
US20100106509A1 (en) 2010-04-29
EP2159790B1 (en) 2019-11-13
US8788264B2 (en) 2014-07-22

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