CA2019801C - Systeme et appareil de codage de paroles - Google Patents

Systeme et appareil de codage de paroles

Info

Publication number
CA2019801C
CA2019801C CA002019801A CA2019801A CA2019801C CA 2019801 C CA2019801 C CA 2019801C CA 002019801 A CA002019801 A CA 002019801A CA 2019801 A CA2019801 A CA 2019801A CA 2019801 C CA2019801 C CA 2019801C
Authority
CA
Canada
Prior art keywords
signal
vector
impulse
white noise
linear prediction
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
CA002019801A
Other languages
English (en)
Other versions
CA2019801A1 (fr
Inventor
Tomohiko Taniguchi
Yoshinori Tanaka
Yasuji Ohta
Fumio Amano
Shigeyuki Unagami
Akira Sasama
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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
Priority claimed from JP1168645A external-priority patent/JPH0333900A/ja
Priority claimed from JP1195302A external-priority patent/JPH03101800A/ja
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of CA2019801A1 publication Critical patent/CA2019801A1/fr
Application granted granted Critical
Publication of CA2019801C publication Critical patent/CA2019801C/fr
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
    • G10L2019/0003—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
    • 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
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/93—Discriminating between voiced and unvoiced parts of speech signals

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)
CA002019801A 1989-06-28 1990-06-26 Systeme et appareil de codage de paroles Expired - Lifetime CA2019801C (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP16618089 1989-06-28
JP01-166180 1989-06-28
JP01-168645 1989-06-30
JP1168645A JPH0333900A (ja) 1989-06-30 1989-06-30 音声符号化方式
JP01-195302 1989-07-27
JP1195302A JPH03101800A (ja) 1989-06-28 1989-07-27 音声符合化方式

Publications (2)

Publication Number Publication Date
CA2019801A1 CA2019801A1 (fr) 1990-12-28
CA2019801C true CA2019801C (fr) 1994-05-31

Family

ID=27322637

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002019801A Expired - Lifetime CA2019801C (fr) 1989-06-28 1990-06-26 Systeme et appareil de codage de paroles

Country Status (3)

Country Link
EP (1) EP0405548B1 (fr)
CA (1) CA2019801C (fr)
DE (1) DE69014156T2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI98104C (fi) * 1991-05-20 1997-04-10 Nokia Mobile Phones Ltd Menetelmä herätevektorin generoimiseksi ja digitaalinen puhekooderi
US5727122A (en) * 1993-06-10 1998-03-10 Oki Electric Industry Co., Ltd. Code excitation linear predictive (CELP) encoder and decoder and code excitation linear predictive coding method
AU732401B2 (en) 1997-12-24 2001-04-26 Blackberry Limited A method for speech coding, method for speech decoding and their apparatuses
ES2663269T3 (es) 2007-06-11 2018-04-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Codificador de audio para codificar una señal de audio que tiene una porción similar a un impulso y una porción estacionaria

Also Published As

Publication number Publication date
EP0405548B1 (fr) 1994-11-17
EP0405548A2 (fr) 1991-01-02
DE69014156D1 (de) 1994-12-22
DE69014156T2 (de) 1995-05-11
EP0405548A3 (en) 1991-08-28
CA2019801A1 (fr) 1990-12-28

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Effective date: 20100626