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FR2796191B1 - AUDIO ENCODING AND DECODING METHODS AND DEVICES - Google Patents

AUDIO ENCODING AND DECODING METHODS AND DEVICES

Info

Publication number
FR2796191B1
FR2796191B1 FR9908635A FR9908635A FR2796191B1 FR 2796191 B1 FR2796191 B1 FR 2796191B1 FR 9908635 A FR9908635 A FR 9908635A FR 9908635 A FR9908635 A FR 9908635A FR 2796191 B1 FR2796191 B1 FR 2796191B1
Authority
FR
France
Prior art keywords
frames
subset
audio signal
cepstral coefficients
devices
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 - Fee Related
Application number
FR9908635A
Other languages
French (fr)
Other versions
FR2796191A1 (en
Inventor
Francois Capman
Carlo Murgia
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.)
Nortel Networks France SAS
Original Assignee
Matra Nortel Communications SAS
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 Matra Nortel Communications SAS filed Critical Matra Nortel Communications SAS
Priority to FR9908635A priority Critical patent/FR2796191B1/en
Priority to PCT/FR2000/001906 priority patent/WO2001003118A1/en
Priority to DE60014085T priority patent/DE60014085D1/en
Priority to AU62920/00A priority patent/AU6292000A/en
Priority to AT00949621T priority patent/ATE277403T1/en
Priority to EP00949621A priority patent/EP1192619B1/en
Publication of FR2796191A1 publication Critical patent/FR2796191A1/en
Application granted granted Critical
Publication of FR2796191B1 publication Critical patent/FR2796191B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband 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
    • 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
    • G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Error Detection And Correction (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

The invention concerns a method wherein a decoder synthesises a set of successive frames of N samples of an audio signal from encoding data included in a digital flow received from the encoder and comprising, for only one subset of frames, data representing spectral amplitudes of the audio signal. The decoder determines for each of the frames of said subset, on the basis of the encoding data, the cepstral coefficients (cx_q[n]) representing some at least of said spectral amplitudes whereas for the frames not forming part of said subset, it interpolates said cepstral coefficients, and generates by means of said interpolated cepstral coefficients (cx[n-1/2] a spectral estimate of the audio signal which it transforms in the temporal domain to obtain the synthesised frame.
FR9908635A 1999-07-05 1999-07-05 AUDIO ENCODING AND DECODING METHODS AND DEVICES Expired - Fee Related FR2796191B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR9908635A FR2796191B1 (en) 1999-07-05 1999-07-05 AUDIO ENCODING AND DECODING METHODS AND DEVICES
PCT/FR2000/001906 WO2001003118A1 (en) 1999-07-05 2000-07-04 Audio coding and decoding by interpolation
DE60014085T DE60014085D1 (en) 1999-07-05 2000-07-04 AUDIO CODING, DECODING FOR INTERPOLATION
AU62920/00A AU6292000A (en) 1999-07-05 2000-07-04 Audio coding and decoding by interpolation
AT00949621T ATE277403T1 (en) 1999-07-05 2000-07-04 AUDIO ENCODING, DECODING FOR INTERPOLATION
EP00949621A EP1192619B1 (en) 1999-07-05 2000-07-04 Audio coding and decoding by interpolation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9908635A FR2796191B1 (en) 1999-07-05 1999-07-05 AUDIO ENCODING AND DECODING METHODS AND DEVICES

Publications (2)

Publication Number Publication Date
FR2796191A1 FR2796191A1 (en) 2001-01-12
FR2796191B1 true FR2796191B1 (en) 2001-10-05

Family

ID=9547704

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9908635A Expired - Fee Related FR2796191B1 (en) 1999-07-05 1999-07-05 AUDIO ENCODING AND DECODING METHODS AND DEVICES

Country Status (6)

Country Link
EP (1) EP1192619B1 (en)
AT (1) ATE277403T1 (en)
AU (1) AU6292000A (en)
DE (1) DE60014085D1 (en)
FR (1) FR2796191B1 (en)
WO (1) WO2001003118A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT500235B1 (en) * 2002-06-21 2007-05-15 Joanneum Res Forschungsgesells SYSTEM AND METHOD FOR AUTOMATIC MONITORING OF A ROADWAY
FR2910996A1 (en) * 2006-12-29 2008-07-04 France Telecom Acoustic unit coding method for use in e.g. speech synthesis, involves determining interpolation function of spectral envelope model of frame from models of reference frames, and coding unit from modelisation of frames and function

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630011A (en) * 1990-12-05 1997-05-13 Digital Voice Systems, Inc. Quantization of harmonic amplitudes representing speech
JP3747492B2 (en) * 1995-06-20 2006-02-22 ソニー株式会社 Audio signal reproduction method and apparatus
US5774837A (en) * 1995-09-13 1998-06-30 Voxware, Inc. Speech coding system and method using voicing probability determination

Also Published As

Publication number Publication date
EP1192619A1 (en) 2002-04-03
FR2796191A1 (en) 2001-01-12
ATE277403T1 (en) 2004-10-15
WO2001003118A1 (en) 2001-01-11
AU6292000A (en) 2001-01-22
EP1192619B1 (en) 2004-09-22
DE60014085D1 (en) 2004-10-28

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Legal Events

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CD Change of name or company name
ST Notification of lapse

Effective date: 20060331