CA2084338A1 - Method for Speech Coding and Voice-Coder - Google Patents

Method for Speech Coding and Voice-Coder

Info

Publication number
CA2084338A1
CA2084338A1 CA2084338A CA2084338A CA2084338A1 CA 2084338 A1 CA2084338 A1 CA 2084338A1 CA 2084338 A CA2084338 A CA 2084338A CA 2084338 A CA2084338 A CA 2084338A CA 2084338 A1 CA2084338 A1 CA 2084338A1
Authority
CA
Canada
Prior art keywords
excitation
adaptive
codevector
codevectors
coder
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2084338A
Other languages
French (fr)
Other versions
CA2084338C (en
Inventor
Toshiki Miyano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2084338A1 publication Critical patent/CA2084338A1/en
Application granted granted Critical
Publication of CA2084338C publication Critical patent/CA2084338C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G10L19/08—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
    • G10L2019/0003—Backward prediction of gain
    • 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

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)

Abstract

A method for speech coding and a voice-coder for coding speech signals divided into frames spaced with a constant interval are disclosed. An adaptive codebook storing excitation signal determined in advance and a plurality of excitation codebooks for multi-stage vector quantization are provided. Each frame is divided into subframes. For each subframe, a candidate of a first predetermined number of adaptive codevectors is selected, and then candidates of each predetermined number of excitation codevectors are selected from each excitation codebook, respectively, by using the candidate of the adaptive codevector. Finally, a combination of the adaptive codevector and each of the excitation codevector is selected from the candidates of the adaptive codevector and each of the sound codevectors.
CA002084338A 1991-12-03 1992-12-02 Method for speech coding and voice-coder Expired - Fee Related CA2084338C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP03319314A JP3089769B2 (en) 1991-12-03 1991-12-03 Audio coding device
JP319314/1991 1991-12-03

Publications (2)

Publication Number Publication Date
CA2084338A1 true CA2084338A1 (en) 1993-06-04
CA2084338C CA2084338C (en) 1997-03-04

Family

ID=18108816

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002084338A Expired - Fee Related CA2084338C (en) 1991-12-03 1992-12-02 Method for speech coding and voice-coder

Country Status (4)

Country Link
EP (1) EP0545386B1 (en)
JP (1) JP3089769B2 (en)
CA (1) CA2084338C (en)
DE (1) DE69228858T2 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5754976A (en) * 1990-02-23 1998-05-19 Universite De Sherbrooke Algebraic codebook with signal-selected pulse amplitude/position combinations for fast coding of speech
US5701392A (en) * 1990-02-23 1997-12-23 Universite De Sherbrooke Depth-first algebraic-codebook search for fast coding of speech
US5717824A (en) * 1992-08-07 1998-02-10 Pacific Communication Sciences, Inc. Adaptive speech coder having code excited linear predictor with multiple codebook searches
JP2800618B2 (en) * 1993-02-09 1998-09-21 日本電気株式会社 Voice parameter coding method
DE4315315A1 (en) * 1993-05-07 1994-11-10 Ant Nachrichtentech Method for vector quantization, especially of speech signals
JP2591430B2 (en) * 1993-06-30 1997-03-19 日本電気株式会社 Vector quantizer
JPH08263099A (en) * 1995-03-23 1996-10-11 Toshiba Corp Encoder
JP3616432B2 (en) * 1995-07-27 2005-02-02 日本電気株式会社 Speech encoding device
WO1998004046A2 (en) * 1996-07-17 1998-01-29 Universite De Sherbrooke Enhanced encoding of dtmf and other signalling tones
EP1002237B1 (en) * 1998-06-09 2011-08-10 Panasonic Corporation Speech coding and speech decoding
JP3541680B2 (en) 1998-06-15 2004-07-14 日本電気株式会社 Audio music signal encoding device and decoding device
DE19845888A1 (en) 1998-10-06 2000-05-11 Bosch Gmbh Robert Method for coding or decoding speech signal samples as well as encoders or decoders
CA2252170A1 (en) 1998-10-27 2000-04-27 Bruno Bessette A method and device for high quality coding of wideband speech and audio signals
US8306007B2 (en) * 2008-01-16 2012-11-06 Panasonic Corporation Vector quantizer, vector inverse quantizer, and methods therefor
KR101290997B1 (en) 2012-03-26 2013-07-30 세종대학교산학협력단 A codebook-based speech enhancement method using adaptive codevector and apparatus thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5208862A (en) * 1990-02-22 1993-05-04 Nec Corporation Speech coder
JP2626223B2 (en) * 1990-09-26 1997-07-02 日本電気株式会社 Audio coding device

Also Published As

Publication number Publication date
JPH05216500A (en) 1993-08-27
EP0545386A2 (en) 1993-06-09
EP0545386B1 (en) 1999-04-07
CA2084338C (en) 1997-03-04
DE69228858D1 (en) 1999-05-12
JP3089769B2 (en) 2000-09-18
EP0545386A3 (en) 1993-08-18
DE69228858T2 (en) 1999-08-19

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