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HK1073914A1 - Code conversion method and device - Google Patents

Code conversion method and device Download PDF

Info

Publication number
HK1073914A1
HK1073914A1 HK05106316A HK05106316A HK1073914A1 HK 1073914 A1 HK1073914 A1 HK 1073914A1 HK 05106316 A HK05106316 A HK 05106316A HK 05106316 A HK05106316 A HK 05106316A HK 1073914 A1 HK1073914 A1 HK 1073914A1
Authority
HK
Hong Kong
Prior art keywords
adaptive codebook
delay
code
excitation signal
circuit
Prior art date
Application number
HK05106316A
Other languages
English (en)
Chinese (zh)
Other versions
HK1073914B (en
Inventor
村岛淳
Original Assignee
日本电气株式会社
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 日本电气株式会社 filed Critical 日本电气株式会社
Publication of HK1073914A1 publication Critical patent/HK1073914A1/xx
Publication of HK1073914B publication Critical patent/HK1073914B/xx

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
    • G10L19/04—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
    • G10L19/173—Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding
    • 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
    • G10L2019/0001—Codebooks
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0011—Long term prediction filters, i.e. pitch estimation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
HK05106316.9A 2001-11-13 2002-11-12 Code conversion method and device HK1073914B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP346987/2001 2001-11-13
JP2001346987A JP4108317B2 (ja) 2001-11-13 2001-11-13 符号変換方法及び装置とプログラム並びに記憶媒体
PCT/JP2002/011783 WO2003042977A1 (fr) 2001-11-13 2002-11-12 Procede, appareil, programme de conversion et support de stockage de code

Publications (2)

Publication Number Publication Date
HK1073914A1 true HK1073914A1 (en) 2005-10-21
HK1073914B HK1073914B (en) 2007-06-01

Family

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Also Published As

Publication number Publication date
JP2003150200A (ja) 2003-05-23
KR100625629B1 (ko) 2006-09-20
US20050010400A1 (en) 2005-01-13
JP4108317B2 (ja) 2008-06-25
US7630884B2 (en) 2009-12-08
EP1457970A1 (en) 2004-09-15
WO2003042977A1 (fr) 2003-05-22
EP1457970A4 (en) 2007-08-08
CN1585970A (zh) 2005-02-23
KR20050044438A (ko) 2005-05-12
CN1287354C (zh) 2006-11-29

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20101112