DE60014085D1 - AUDIO CODING, DECODING FOR INTERPOLATION - Google Patents

AUDIO CODING, DECODING FOR INTERPOLATION

Info

Publication number
DE60014085D1
DE60014085D1 DE60014085T DE60014085T DE60014085D1 DE 60014085 D1 DE60014085 D1 DE 60014085D1 DE 60014085 T DE60014085 T DE 60014085T DE 60014085 T DE60014085 T DE 60014085T DE 60014085 D1 DE60014085 D1 DE 60014085D1
Authority
DE
Germany
Prior art keywords
frames
subset
audio signal
cepstral coefficients
interpolation
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
DE60014085T
Other languages
German (de)
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
Nortel Networks France 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 Nortel Networks France SAS filed Critical Nortel Networks France SAS
Application granted granted Critical
Publication of DE60014085D1 publication Critical patent/DE60014085D1/en
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
    • G10L19/02—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.
DE60014085T 1999-07-05 2000-07-04 AUDIO CODING, DECODING FOR INTERPOLATION Expired - Lifetime DE60014085D1 (en)

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
DE60014085D1 true DE60014085D1 (en) 2004-10-28

Family

ID=9547704

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60014085T Expired - Lifetime DE60014085D1 (en) 1999-07-05 2000-07-04 AUDIO CODING, DECODING FOR INTERPOLATION

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
AU6292000A (en) 2001-01-22
FR2796191A1 (en) 2001-01-12
ATE277403T1 (en) 2004-10-15
EP1192619A1 (en) 2002-04-03
WO2001003118A1 (en) 2001-01-11
EP1192619B1 (en) 2004-09-22
FR2796191B1 (en) 2001-10-05

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