EP0694907A3 - Speech coder - Google Patents

Speech coder Download PDF

Info

Publication number
EP0694907A3
EP0694907A3 EP95111278A EP95111278A EP0694907A3 EP 0694907 A3 EP0694907 A3 EP 0694907A3 EP 95111278 A EP95111278 A EP 95111278A EP 95111278 A EP95111278 A EP 95111278A EP 0694907 A3 EP0694907 A3 EP 0694907A3
Authority
EP
European Patent Office
Prior art keywords
speech coder
coder
speech
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.)
Withdrawn
Application number
EP95111278A
Other languages
German (de)
French (fr)
Other versions
EP0694907A2 (en
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.)
NEC 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
Publication of EP0694907A2 publication Critical patent/EP0694907A2/en
Publication of EP0694907A3 publication Critical patent/EP0694907A3/en
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • G10L2019/0011—Long term prediction filters, i.e. pitch estimation
    • 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
    • G10L2019/0013—Codebook search algorithms
EP95111278A 1994-07-19 1995-07-18 Speech coder Withdrawn EP0694907A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP187903/94 1994-07-19
JP6187903A JPH0830299A (en) 1994-07-19 1994-07-19 Voice coder

Publications (2)

Publication Number Publication Date
EP0694907A2 EP0694907A2 (en) 1996-01-31
EP0694907A3 true EP0694907A3 (en) 1997-10-15

Family

ID=16214222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111278A Withdrawn EP0694907A3 (en) 1994-07-19 1995-07-18 Speech coder

Country Status (3)

Country Link
EP (1) EP0694907A3 (en)
JP (1) JPH0830299A (en)
CA (1) CA2154192A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08292798A (en) * 1995-04-24 1996-11-05 Nec Corp Voice reproducing control method
JP3343082B2 (en) 1998-10-27 2002-11-11 松下電器産業株式会社 CELP speech encoder
JP3594854B2 (en) * 1999-11-08 2004-12-02 三菱電機株式会社 Audio encoding device and audio decoding device
USRE43209E1 (en) 1999-11-08 2012-02-21 Mitsubishi Denki Kabushiki Kaisha Speech coding apparatus and speech decoding apparatus
EP2099025A4 (en) * 2006-12-14 2010-12-22 Panasonic Corp Audio encoding device and audio encoding method
JP4525694B2 (en) * 2007-03-27 2010-08-18 パナソニック株式会社 Speech encoding device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415163A2 (en) * 1989-08-31 1991-03-06 Codex Corporation Digital speech coder having improved long term lag parameter determination
EP0573398A2 (en) * 1992-06-01 1993-12-08 Hughes Aircraft Company C.E.L.P. Vocoder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989002148A1 (en) * 1987-08-28 1989-03-09 British Telecommunications Public Limited Company Coded communications system
JP3254696B2 (en) * 1991-09-25 2002-02-12 三菱電機株式会社 Audio encoding device, audio decoding device, and sound source generation method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415163A2 (en) * 1989-08-31 1991-03-06 Codex Corporation Digital speech coder having improved long term lag parameter determination
EP0573398A2 (en) * 1992-06-01 1993-12-08 Hughes Aircraft Company C.E.L.P. Vocoder

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CAMPBELL JR J P ET AL: "THE FEDERAL STANDARD 1016 4800 BPS CELP VOICE CODER", DIGITAL SIGNAL PROCESSING, vol. 1, no. 3, 1 July 1991 (1991-07-01), pages 145 - 155, XP000393612 *
SHIJUN YANG ET AL: "IMPROVED ADAPTIVE CELP CODER AT 5.2 KBIT/S", PROCEEDINGS OF THE REGION TEN CONFERENCE (TENCON), BEIJING, OCT. 19 - 21, 1993, vol. 3 OF 5, 19 October 1993 (1993-10-19), YUAN BAOZONG (ED ), pages 299 - 302, XP000521421 *

Also Published As

Publication number Publication date
CA2154192A1 (en) 1996-01-20
JPH0830299A (en) 1996-02-02
EP0694907A2 (en) 1996-01-31

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