DE69420200D1 - CELP Koder-Dekoder - Google Patents

CELP Koder-Dekoder

Info

Publication number
DE69420200D1
DE69420200D1 DE69420200T DE69420200T DE69420200D1 DE 69420200 D1 DE69420200 D1 DE 69420200D1 DE 69420200 T DE69420200 T DE 69420200T DE 69420200 T DE69420200 T DE 69420200T DE 69420200 D1 DE69420200 D1 DE 69420200D1
Authority
DE
Germany
Prior art keywords
celp encoder
encoder decoder
decoder
celp
encoder
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
DE69420200T
Other languages
English (en)
Other versions
DE69420200T2 (de
Inventor
Willem Bastiaan Kleijn
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.)
AT&T Corp
Original Assignee
AT&T 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 AT&T Corp filed Critical AT&T Corp
Publication of DE69420200D1 publication Critical patent/DE69420200D1/de
Application granted granted Critical
Publication of DE69420200T2 publication Critical patent/DE69420200T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
DE69420200T 1993-06-28 1994-06-15 CELP Koder-Dekoder Expired - Lifetime DE69420200T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8342693A 1993-06-28 1993-06-28

Publications (2)

Publication Number Publication Date
DE69420200D1 true DE69420200D1 (de) 1999-09-30
DE69420200T2 DE69420200T2 (de) 2000-07-06

Family

ID=22178247

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69420200T Expired - Lifetime DE69420200T2 (de) 1993-06-28 1994-06-15 CELP Koder-Dekoder

Country Status (6)

Country Link
US (1) US5719993A (de)
EP (1) EP0631274B1 (de)
JP (1) JP3168238B2 (de)
CA (1) CA2124713C (de)
DE (1) DE69420200T2 (de)
ES (1) ES2137325T3 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5774846A (en) * 1994-12-19 1998-06-30 Matsushita Electric Industrial Co., Ltd. Speech coding apparatus, linear prediction coefficient analyzing apparatus and noise reducing apparatus
US7072832B1 (en) * 1998-08-24 2006-07-04 Mindspeed Technologies, Inc. System for speech encoding having an adaptive encoding arrangement
US6415255B1 (en) * 1999-06-10 2002-07-02 Nec Electronics, Inc. Apparatus and method for an array processing accelerator for a digital signal processor
US6704701B1 (en) * 1999-07-02 2004-03-09 Mindspeed Technologies, Inc. Bi-directional pitch enhancement in speech coding systems
DE10026904A1 (de) 2000-04-28 2002-01-03 Deutsche Telekom Ag Verfahren zur Berechnung des die Lautstärke mitbestimmenden Verstärkungsfaktors für ein codiert übertragenes Sprachsignal
US7133823B2 (en) * 2000-09-15 2006-11-07 Mindspeed Technologies, Inc. System for an adaptive excitation pattern for speech coding
US7103538B1 (en) * 2002-06-10 2006-09-05 Mindspeed Technologies, Inc. Fixed code book with embedded adaptive code book
CN101794579A (zh) 2005-01-12 2010-08-04 日本电信电话株式会社 长期预测编码和长期预测解码的方法和装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4797925A (en) * 1986-09-26 1989-01-10 Bell Communications Research, Inc. Method for coding speech at low bit rates
EP0392126B1 (de) * 1989-04-11 1994-07-20 International Business Machines Corporation Verfahren zur schnellen Bestimmung der Grundfrequenz in Sprachcodierern mit langfristiger Prädiktion
US4980916A (en) * 1989-10-26 1990-12-25 General Electric Company Method for improving speech quality in code excited linear predictive speech coding
US5195168A (en) * 1991-03-15 1993-03-16 Codex Corporation Speech coder and method having spectral interpolation and fast codebook search
US5267317A (en) * 1991-10-18 1993-11-30 At&T Bell Laboratories Method and apparatus for smoothing pitch-cycle waveforms
US5327520A (en) * 1992-06-04 1994-07-05 At&T Bell Laboratories Method of use of voice message coder/decoder

Also Published As

Publication number Publication date
EP0631274B1 (de) 1999-08-25
JP3168238B2 (ja) 2001-05-21
ES2137325T3 (es) 1999-12-16
JPH07168597A (ja) 1995-07-04
CA2124713C (en) 1998-09-22
EP0631274A2 (de) 1994-12-28
EP0631274A3 (de) 1996-04-17
DE69420200T2 (de) 2000-07-06
CA2124713A1 (en) 1994-12-19
US5719993A (en) 1998-02-17

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Legal Events

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8364 No opposition during term of opposition