DE69527345T2 - CELP-Sprachkodierer mit verbessertem Langzeit-Prädiktor - Google Patents

CELP-Sprachkodierer mit verbessertem Langzeit-Prädiktor

Info

Publication number
DE69527345T2
DE69527345T2 DE69527345T DE69527345T DE69527345T2 DE 69527345 T2 DE69527345 T2 DE 69527345T2 DE 69527345 T DE69527345 T DE 69527345T DE 69527345 T DE69527345 T DE 69527345T DE 69527345 T2 DE69527345 T2 DE 69527345T2
Authority
DE
Germany
Prior art keywords
speech encoder
improved long
term predictor
celp speech
celp
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.)
Expired - Lifetime
Application number
DE69527345T
Other languages
English (en)
Other versions
DE69527345D1 (de
Inventor
Keiichi Funaki
Kazunori Ozawa
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.)
Renesas Electronics Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE69527345D1 publication Critical patent/DE69527345D1/de
Publication of DE69527345T2 publication Critical patent/DE69527345T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G10L2019/0011—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)
DE69527345T 1994-12-27 1995-12-27 CELP-Sprachkodierer mit verbessertem Langzeit-Prädiktor Expired - Lifetime DE69527345T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06323454A JP3087591B2 (ja) 1994-12-27 1994-12-27 音声符号化装置

Publications (2)

Publication Number Publication Date
DE69527345D1 DE69527345D1 (de) 2002-08-14
DE69527345T2 true DE69527345T2 (de) 2003-03-06

Family

ID=18154858

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69527345T Expired - Lifetime DE69527345T2 (de) 1994-12-27 1995-12-27 CELP-Sprachkodierer mit verbessertem Langzeit-Prädiktor

Country Status (5)

Country Link
US (1) US5924063A (de)
EP (1) EP0724252B1 (de)
JP (1) JP3087591B2 (de)
CA (1) CA2166138C (de)
DE (1) DE69527345T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7024355B2 (en) * 1997-01-27 2006-04-04 Nec Corporation Speech coder/decoder
US9058812B2 (en) * 2005-07-27 2015-06-16 Google Technology Holdings LLC Method and system for coding an information signal using pitch delay contour adjustment
JPWO2008072732A1 (ja) * 2006-12-14 2010-04-02 パナソニック株式会社 音声符号化装置および音声符号化方法
GB2466671B (en) 2009-01-06 2013-03-27 Skype Speech encoding
GB2466674B (en) 2009-01-06 2013-11-13 Skype Speech coding
GB2466670B (en) 2009-01-06 2012-11-14 Skype Speech encoding
GB2466672B (en) 2009-01-06 2013-03-13 Skype Speech coding
GB2466669B (en) 2009-01-06 2013-03-06 Skype Speech coding
GB2466675B (en) 2009-01-06 2013-03-06 Skype Speech coding
GB2466673B (en) 2009-01-06 2012-11-07 Skype Quantization
US8452606B2 (en) 2009-09-29 2013-05-28 Skype Speech encoding using multiple bit rates

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359696A (en) * 1988-06-28 1994-10-25 Motorola Inc. Digital speech coder having improved sub-sample resolution long-term predictor
JP2940005B2 (ja) * 1989-07-20 1999-08-25 日本電気株式会社 音声符号化装置
JP3254687B2 (ja) * 1991-02-26 2002-02-12 日本電気株式会社 音声符号化方式
US5233660A (en) * 1991-09-10 1993-08-03 At&T Bell Laboratories Method and apparatus for low-delay celp speech coding and decoding

Also Published As

Publication number Publication date
CA2166138C (en) 2000-08-01
JP3087591B2 (ja) 2000-09-11
EP0724252B1 (de) 2002-07-10
EP0724252A2 (de) 1996-07-31
CA2166138A1 (en) 1996-06-28
US5924063A (en) 1999-07-13
JPH08179797A (ja) 1996-07-12
EP0724252A3 (de) 1998-02-11
DE69527345D1 (de) 2002-08-14

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Legal Events

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