EP0801790A1 - Verfahren zur sprachkodierung mittels analyse durch synthese - Google Patents

Verfahren zur sprachkodierung mittels analyse durch synthese

Info

Publication number
EP0801790A1
EP0801790A1 EP96901010A EP96901010A EP0801790A1 EP 0801790 A1 EP0801790 A1 EP 0801790A1 EP 96901010 A EP96901010 A EP 96901010A EP 96901010 A EP96901010 A EP 96901010A EP 0801790 A1 EP0801790 A1 EP 0801790A1
Authority
EP
European Patent Office
Prior art keywords
frame
filter
term
short
analysis
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
EP96901010A
Other languages
English (en)
French (fr)
Other versions
EP0801790B1 (de
Inventor
William Navarro
Michel Mauc
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
Matra Communication SA
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, Matra Communication SA filed Critical Matra Nortel Communications SAS
Publication of EP0801790A1 publication Critical patent/EP0801790A1/de
Application granted granted Critical
Publication of EP0801790B1 publication Critical patent/EP0801790B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech 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
    • G10L19/04Speech 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
    • G10L19/08Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/083Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being an excitation gain
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech 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
    • G10L19/04Speech 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
    • G10L19/08Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/10Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech 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
    • G10L2019/0001Codebooks
    • G10L2019/0003Backward prediction of gain
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech 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
    • G10L2019/0001Codebooks
    • G10L2019/0011Long term prediction filters, i.e. pitch estimation
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech 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
    • G10L2019/0001Codebooks
    • G10L2019/0012Smoothing of parameters of the decoder interpolation
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/24Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being the cepstrum
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/93Discriminating between voiced and unvoiced parts of speech signals

Definitions

  • a linear prediction of the speech signal is carried out in order to obtain the coefficients of a short-term synthesis filter modeling the transfer function of the vocal tract. These coefficients are transmitted to the decoder, as well as parameters characterizing an excitation to be applied to the short-term synthesis filter.
  • further research is carried out on the longer-term correlations of the speech signal in order to characterize a long-term synthesis filter accounting for the pitch of the speech.
  • the excitation indeed has a predictable component which can be represented by the past excitation, delayed by TP samples of the speech signal and affected by a gain g p .
  • the long-term prediction delay is determined in two stages.
  • the open loop LTP analysis module 36 detects the voiced frames of the speech signal and determines, for each voiced frame, a degree of voicing MV and a search interval for the long-term prediction delay.
  • the search interval is defined by a central value represented by its quantization index ZP and by a width in the domain of the quantification indexes, depending on the degree of voicing MV.
  • n -L,; / ') - ⁇ L (k', j , ).

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)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
EP96901010A 1995-01-06 1996-01-03 Verfahren zur sprachkodierung mittels analyse durch synthese Expired - Lifetime EP0801790B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9500135A FR2729247A1 (fr) 1995-01-06 1995-01-06 Procede de codage de parole a analyse par synthese
FR9500135 1995-01-06
PCT/FR1996/000006 WO1996021220A1 (fr) 1995-01-06 1996-01-03 Procede de codage de parole a analyse par synthese

Publications (2)

Publication Number Publication Date
EP0801790A1 true EP0801790A1 (de) 1997-10-22
EP0801790B1 EP0801790B1 (de) 1999-05-12

Family

ID=9474932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96901010A Expired - Lifetime EP0801790B1 (de) 1995-01-06 1996-01-03 Verfahren zur sprachkodierung mittels analyse durch synthese

Country Status (10)

Country Link
US (1) US5963898A (de)
EP (1) EP0801790B1 (de)
CN (1) CN1173938A (de)
AT (1) ATE180092T1 (de)
AU (1) AU697892B2 (de)
BR (1) BR9606887A (de)
CA (1) CA2209623A1 (de)
DE (1) DE69602421T2 (de)
FR (1) FR2729247A1 (de)
WO (1) WO1996021220A1 (de)

Cited By (2)

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CN111587457A (zh) * 2017-11-10 2020-08-25 弗劳恩霍夫应用研究促进协会 信号滤波
US11562754B2 (en) 2017-11-10 2023-01-24 Fraunhofer-Gesellschaft Zur F Rderung Der Angewandten Forschung E.V. Analysis/synthesis windowing function for modulated lapped transformation

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US20040098255A1 (en) * 2002-11-14 2004-05-20 France Telecom Generalized analysis-by-synthesis speech coding method, and coder implementing such method
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Publication number Priority date Publication date Assignee Title
CN111587457A (zh) * 2017-11-10 2020-08-25 弗劳恩霍夫应用研究促进协会 信号滤波
US11562754B2 (en) 2017-11-10 2023-01-24 Fraunhofer-Gesellschaft Zur F Rderung Der Angewandten Forschung E.V. Analysis/synthesis windowing function for modulated lapped transformation
CN111587457B (zh) * 2017-11-10 2023-05-12 弗劳恩霍夫应用研究促进协会 信号滤波
US12033646B2 (en) 2017-11-10 2024-07-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Analysis/synthesis windowing function for modulated lapped transformation

Also Published As

Publication number Publication date
US5963898A (en) 1999-10-05
DE69602421T2 (de) 1999-12-23
EP0801790B1 (de) 1999-05-12
ATE180092T1 (de) 1999-05-15
AU697892B2 (en) 1998-10-22
DE69602421D1 (de) 1999-06-17
CN1173938A (zh) 1998-02-18
FR2729247A1 (fr) 1996-07-12
FR2729247B1 (de) 1997-03-07
BR9606887A (pt) 1997-10-28
CA2209623A1 (en) 1996-07-11
WO1996021220A1 (fr) 1996-07-11
AU4490396A (en) 1996-07-24

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