CA2060310A1 - Digital speech coder with vector excitation source having improved speech quality - Google Patents

Digital speech coder with vector excitation source having improved speech quality

Info

Publication number
CA2060310A1
CA2060310A1 CA002060310A CA2060310A CA2060310A1 CA 2060310 A1 CA2060310 A1 CA 2060310A1 CA 002060310 A CA002060310 A CA 002060310A CA 2060310 A CA2060310 A CA 2060310A CA 2060310 A1 CA2060310 A1 CA 2060310A1
Authority
CA
Canada
Prior art keywords
excitation source
vector excitation
improved
vector
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.)
Granted
Application number
CA002060310A
Other languages
French (fr)
Other versions
CA2060310C (en
Inventor
Ira Alan Gerson
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.)
Motorola Solutions Inc
Original Assignee
Ira Alan Gerson
Motorola, Inc.
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 Ira Alan Gerson, Motorola, Inc. filed Critical Ira Alan Gerson
Publication of CA2060310A1 publication Critical patent/CA2060310A1/en
Application granted granted Critical
Publication of CA2060310C publication Critical patent/CA2060310C/en
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
    • G10L13/00—Speech synthesis; Text to speech systems
    • 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
    • G10L19/12—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 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
    • G10L2019/0004—Design or structure of the codebook
    • G10L2019/0005—Multi-stage vector quantisation
    • 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

Abstract

In a vector excitation source digital speech coder utilizing vector excitation, candidate excitation sources (111, 121) are con-sidered independent of certain pitch parameters. Once a particular excitation source has been selected, the excluded pitch par-ameter may then be optimized, resulting in an overall improvement in speech quality.
CA002060310A 1989-06-23 1990-05-02 Digital speech coder with vector excitation source having improved speech quality Expired - Lifetime CA2060310C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US37054189A 1989-06-23 1989-06-23
US370,541 1989-06-23
PCT/US1990/002469 WO1991001545A1 (en) 1989-06-23 1990-05-02 Digital speech coder with vector excitation source having improved speech quality

Publications (2)

Publication Number Publication Date
CA2060310A1 true CA2060310A1 (en) 1990-12-24
CA2060310C CA2060310C (en) 2001-07-17

Family

ID=23460115

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002060310A Expired - Lifetime CA2060310C (en) 1989-06-23 1990-05-02 Digital speech coder with vector excitation source having improved speech quality

Country Status (10)

Country Link
EP (1) EP0484339B1 (en)
KR (1) KR950003557B1 (en)
CN (1) CN1023160C (en)
AU (1) AU638462B2 (en)
BR (1) BR9007467A (en)
CA (1) CA2060310C (en)
DE (1) DE69032026T2 (en)
IL (1) IL94119A (en)
NZ (1) NZ234180A (en)
WO (1) WO1991001545A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0451200A (en) * 1990-06-18 1992-02-19 Fujitsu Ltd Sound encoding system
JPH0451199A (en) * 1990-06-18 1992-02-19 Fujitsu Ltd Sound encoding/decoding system
IT1241358B (en) * 1990-12-20 1994-01-10 Sip VOICE SIGNAL CODING SYSTEM WITH NESTED SUBCODE
JP2776050B2 (en) * 1991-02-26 1998-07-16 日本電気株式会社 Audio coding method
DE4315315A1 (en) * 1993-05-07 1994-11-10 Ant Nachrichtentech Method for vector quantization, especially of speech signals
SG43128A1 (en) * 1993-06-10 1997-10-17 Oki Electric Ind Co Ltd Code excitation linear predictive (celp) encoder and decoder
JP3224955B2 (en) * 1994-05-27 2001-11-05 株式会社東芝 Vector quantization apparatus and vector quantization method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1252568A (en) * 1984-12-24 1989-04-11 Kazunori Ozawa Low bit-rate pattern encoding and decoding capable of reducing an information transmission rate
US4868867A (en) * 1987-04-06 1989-09-19 Voicecraft Inc. Vector excitation speech or audio coder for transmission or storage
US4899385A (en) * 1987-06-26 1990-02-06 American Telephone And Telegraph Company Code excited linear predictive vocoder

Also Published As

Publication number Publication date
NZ234180A (en) 1993-11-25
AU5735990A (en) 1991-02-22
DE69032026T2 (en) 1998-09-17
CA2060310C (en) 2001-07-17
EP0484339B1 (en) 1998-02-04
KR950003557B1 (en) 1995-04-14
BR9007467A (en) 1992-06-16
CN1023160C (en) 1993-12-15
AU638462B2 (en) 1993-07-01
KR920702787A (en) 1992-10-06
DE69032026D1 (en) 1998-03-12
WO1991001545A1 (en) 1991-02-07
EP0484339A4 (en) 1993-05-05
IL94119A0 (en) 1991-01-31
CN1048278A (en) 1991-01-02
EP0484339A1 (en) 1992-05-13
IL94119A (en) 1996-06-18

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