EP0481895A3 - Method and apparatus for low bit rate transmission of a speech signal using celp coding - Google Patents

Method and apparatus for low bit rate transmission of a speech signal using celp coding Download PDF

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Publication number
EP0481895A3
EP0481895A3 EP19910402774 EP91402774A EP0481895A3 EP 0481895 A3 EP0481895 A3 EP 0481895A3 EP 19910402774 EP19910402774 EP 19910402774 EP 91402774 A EP91402774 A EP 91402774A EP 0481895 A3 EP0481895 A3 EP 0481895A3
Authority
EP
European Patent Office
Prior art keywords
gamma
dictionary
bit rate
low bit
vectors
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
EP19910402774
Other languages
French (fr)
Other versions
EP0481895A2 (en
EP0481895B1 (en
Inventor
Renaud Di Francesco
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Orange SA
Original Assignee
France Telecom SA
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Filing date
Publication date
Application filed by France Telecom SA filed Critical France Telecom SA
Publication of EP0481895A2 publication Critical patent/EP0481895A2/en
Publication of EP0481895A3 publication Critical patent/EP0481895A3/en
Application granted granted Critical
Publication of EP0481895B1 publication Critical patent/EP0481895B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G10L19/083—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being an excitation 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
    • 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
    • G10L2019/0004—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
    • G10L2019/0007—Codebook element generation

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)

Abstract

The invention relates to a method for low bit rate transmission of a digital speech signal. <??>The coding is effected by linear prediction driven by codes in order to generate a code signal, a wave form being represented by an initial vector (O) of dimension L, from a filter for synthesis by a reference wave form selected from among a dictionary of reference vectors (v), with a minimum deviation criterion min ¦¦x-H.v¦¦<2>, x representing a target vector by perceptual weighting of the initial vector (O). A dictionary (Y) factorised as a product of base vectors yi of n-ary form, corrected by a scale factor gamma i of distribution of the excitation energy, and of a dictionary G(y) of gains gk, are established in order to represent the dictionary of the reference vectors (v), vk,i = gk. gamma i.yi. The criterion is established by calculation of C(gk, gamma i.yi) = 2 gk<x¦H. gamma i.yi>-gk<2> ¦¦H. gamma i.yi¦¦<2> formed by the scalar products and perceptual energies. To the initial vector (O) is attributed the optimal reference vector vk<*>, i<*> = gk<*>.i<*>.yi<*> represented only by the index values k<*>,i<*>. <??>Application to coding and transmission of speech at a low bit rate by ternary or n-ary vectors. <IMAGE>
EP91402774A 1990-10-19 1991-10-17 Method and apparatus for low bit rate transmission of a speech signal using CELP coding Expired - Lifetime EP0481895B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9012980A FR2668288B1 (en) 1990-10-19 1990-10-19 LOW-THROUGHPUT TRANSMISSION METHOD BY CELP CODING OF A SPEECH SIGNAL AND CORRESPONDING SYSTEM.
FR9012980 1990-10-19

Publications (3)

Publication Number Publication Date
EP0481895A2 EP0481895A2 (en) 1992-04-22
EP0481895A3 true EP0481895A3 (en) 1992-08-12
EP0481895B1 EP0481895B1 (en) 1997-12-10

Family

ID=9401407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402774A Expired - Lifetime EP0481895B1 (en) 1990-10-19 1991-10-17 Method and apparatus for low bit rate transmission of a speech signal using CELP coding

Country Status (5)

Country Link
US (1) US5226085A (en)
EP (1) EP0481895B1 (en)
JP (1) JP3130348B2 (en)
DE (1) DE69128407T2 (en)
FR (1) FR2668288B1 (en)

Families Citing this family (18)

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JP2658794B2 (en) * 1993-01-22 1997-09-30 日本電気株式会社 Audio coding method
WO1994025959A1 (en) * 1993-04-29 1994-11-10 Unisearch Limited Use of an auditory model to improve quality or lower the bit rate of speech synthesis systems
FR2722631B1 (en) * 1994-07-13 1996-09-20 France Telecom Etablissement P METHOD AND SYSTEM FOR ADAPTIVE FILTERING BY BLIND EQUALIZATION OF A DIGITAL TELEPHONE SIGNAL AND THEIR APPLICATIONS
JP3058028B2 (en) * 1994-10-31 2000-07-04 三菱電機株式会社 Image encoded data re-encoding device
SE504010C2 (en) * 1995-02-08 1996-10-14 Ericsson Telefon Ab L M Method and apparatus for predictive coding of speech and data signals
DE19516106C2 (en) * 1995-05-05 2003-04-03 Philips Corp Intellectual Pty Procedure for determining reference values
US6477496B1 (en) 1996-12-20 2002-11-05 Eliot M. Case Signal synthesis by decoding subband scale factors from one audio signal and subband samples from different one
US6516299B1 (en) 1996-12-20 2003-02-04 Qwest Communication International, Inc. Method, system and product for modifying the dynamic range of encoded audio signals
US6782365B1 (en) 1996-12-20 2004-08-24 Qwest Communications International Inc. Graphic interface system and product for editing encoded audio data
US5864813A (en) * 1996-12-20 1999-01-26 U S West, Inc. Method, system and product for harmonic enhancement of encoded audio signals
US6463405B1 (en) 1996-12-20 2002-10-08 Eliot M. Case Audiophile encoding of digital audio data using 2-bit polarity/magnitude indicator and 8-bit scale factor for each subband
US5845251A (en) * 1996-12-20 1998-12-01 U S West, Inc. Method, system and product for modifying the bandwidth of subband encoded audio data
US5864820A (en) * 1996-12-20 1999-01-26 U S West, Inc. Method, system and product for mixing of encoded audio signals
FI113571B (en) 1998-03-09 2004-05-14 Nokia Corp speech Coding
US7536298B2 (en) * 2004-03-15 2009-05-19 Intel Corporation Method of comfort noise generation for speech communication
JP4993676B2 (en) * 2006-09-01 2012-08-08 キヤノン株式会社 Image coding apparatus and image coding method
CN101430879B (en) * 2007-11-05 2011-08-10 华为技术有限公司 Multi-speed audio encoding method
PT2515299T (en) 2009-12-14 2018-10-10 Fraunhofer Ges Forschung Vector quantization device, voice coding device, vector quantization method, and voice coding method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0379296A2 (en) * 1989-01-17 1990-07-25 AT&T Corp. A low-delay code-excited linear predictive coder for speech or audio
WO1991013432A1 (en) * 1990-02-23 1991-09-05 Universite De Sherbrooke Dynamic codebook for efficient speech coding based on algebraic codes

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
NL8302985A (en) * 1983-08-26 1985-03-18 Philips Nv MULTIPULSE EXCITATION LINEAR PREDICTIVE VOICE CODER.
NL8500843A (en) * 1985-03-22 1986-10-16 Koninkl Philips Electronics Nv MULTIPULS EXCITATION LINEAR-PREDICTIVE VOICE CODER.
US4944013A (en) * 1985-04-03 1990-07-24 British Telecommunications Public Limited Company Multi-pulse speech coder
IT1195350B (en) * 1986-10-21 1988-10-12 Cselt Centro Studi Lab Telecom PROCEDURE AND DEVICE FOR THE CODING AND DECODING OF THE VOICE SIGNAL BY EXTRACTION OF PARA METERS AND TECHNIQUES OF VECTOR QUANTIZATION
US4868867A (en) * 1987-04-06 1989-09-19 Voicecraft Inc. Vector excitation speech or audio coder for transmission or storage
US4910781A (en) * 1987-06-26 1990-03-20 At&T Bell Laboratories Code excited linear predictive vocoder using virtual searching
US4899385A (en) * 1987-06-26 1990-02-06 American Telephone And Telegraph Company Code excited linear predictive vocoder
EP0374941B1 (en) * 1988-12-23 1995-08-09 Nec Corporation Communication system capable of improving a speech quality by effectively calculating excitation multipulses
US4980916A (en) * 1989-10-26 1990-12-25 General Electric Company Method for improving speech quality in code excited linear predictive speech coding

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0379296A2 (en) * 1989-01-17 1990-07-25 AT&T Corp. A low-delay code-excited linear predictive coder for speech or audio
WO1991013432A1 (en) * 1990-02-23 1991-09-05 Universite De Sherbrooke Dynamic codebook for efficient speech coding based on algebraic codes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ADVANCED IN SPEECH CODING (IEEE WORKSHOP ON SPEECH CODING FOR TELECOMMUNICATIONS, Vancouver, 5 - 8 septembre 1989), pages 145-156, Kluwer Academic Publishers, Dordrecht, NL; R.A. SALAMI: "Binary pulse excitation: a novel approach to low complexity CELP coding" *

Also Published As

Publication number Publication date
DE69128407D1 (en) 1998-01-22
DE69128407T2 (en) 1998-06-04
EP0481895A2 (en) 1992-04-22
JP3130348B2 (en) 2001-01-31
FR2668288A1 (en) 1992-04-24
EP0481895B1 (en) 1997-12-10
FR2668288B1 (en) 1993-01-15
US5226085A (en) 1993-07-06
JPH04264500A (en) 1992-09-21

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