NO950490L - Kode-eksiterende, lineært forutsigbar (CELP) koder og dekoder - Google Patents

Kode-eksiterende, lineært forutsigbar (CELP) koder og dekoder

Info

Publication number
NO950490L
NO950490L NO950490A NO950490A NO950490L NO 950490 L NO950490 L NO 950490L NO 950490 A NO950490 A NO 950490A NO 950490 A NO950490 A NO 950490A NO 950490 L NO950490 L NO 950490L
Authority
NO
Norway
Prior art keywords
code
codebook
excitation codebook
celp
exiting
Prior art date
Application number
NO950490A
Other languages
English (en)
Other versions
NO950490D0 (no
Inventor
Kenichiro Hosoda
Hiromi Aoyagi
Hiroshi Katsuragawa
Yoshihiro Ariyama
Original Assignee
Oki Electric Ind Co Ltd
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
Priority claimed from SG1996004078A external-priority patent/SG43128A1/en
Application filed by Oki Electric Ind Co Ltd filed Critical Oki Electric Ind Co Ltd
Publication of NO950490D0 publication Critical patent/NO950490D0/no
Publication of NO950490L publication Critical patent/NO950490L/no

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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • G10L19/07—Line spectrum pair [LSP] 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
    • G10L19/04—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
    • G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
    • 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
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] 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
    • G10L2019/0001—Codebooks
    • G10L2019/0004—Design or structure of the codebook
    • G10L2019/0005—Multi-stage vector quantisation
    • 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
    • G10L25/24—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 the cepstrum

Landscapes

  • 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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Det foreligger en kode-eksiterende, lineært forut- sigende (CELP) kode- eller dekodeanordning hvori en kodevektor som sendes med en kodebok som for eksempel en stokastisk kodebok (321) blir adaptivt omformet l overensstemmelse med en stemmeorgan-analyseinformasjon (LPC) slik at en høy kvalitet på talegjengivelse oppnås med en lav kodetakt. For å oppnå en lignende virkning finnes det dessuten en pulslignende eksiteringskodebok (322) dannet av isolert puls, l tillegg til den adaptive eksiteringskodebok (320) og den stokastlske eksiteringskodebok (321) slik at enten den stokastiske ekslterlngskodebok (321) eller den pulslignende eksiteringskodebok (322) valgvis kan benyttes for å frembringe en stemmeorganparameter som en parameter med et lineært spektrumpar.
NO950490A 1993-06-10 1995-02-09 Kode-eksiterende, lineært forutsigbar (CELP) koder og dekoder NO950490L (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG1996004078A SG43128A1 (en) 1993-06-10 1993-06-10 Code excitation linear predictive (celp) encoder and decoder
PCT/JP1993/000776 WO1994029965A1 (fr) 1993-06-10 1993-06-10 Codeur-decodeur predictif lineaire a excitation par codes

Publications (2)

Publication Number Publication Date
NO950490D0 NO950490D0 (no) 1995-02-09
NO950490L true NO950490L (no) 1995-03-29

Family

ID=26434408

Family Applications (1)

Application Number Title Priority Date Filing Date
NO950490A NO950490L (no) 1993-06-10 1995-02-09 Kode-eksiterende, lineært forutsigbar (CELP) koder og dekoder

Country Status (2)

Country Link
NO (1) NO950490L (no)
WO (1) WO1994029965A1 (no)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0333900A (ja) * 1989-06-30 1991-02-14 Fujitsu Ltd 音声符号化方式
JP3010654B2 (ja) * 1989-11-29 2000-02-21 ソニー株式会社 圧縮符号化装置及び方法
JP2796408B2 (ja) * 1990-06-18 1998-09-10 シャープ株式会社 音声情報圧縮装置
JPH0451199A (ja) * 1990-06-18 1992-02-19 Fujitsu Ltd 音声符号化・復号化方式

Also Published As

Publication number Publication date
WO1994029965A1 (fr) 1994-12-22
NO950490D0 (no) 1995-02-09

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