IT1232084B - Sistema di codifica per segnali audio a banda allargata - Google Patents

Sistema di codifica per segnali audio a banda allargata

Info

Publication number
IT1232084B
IT1232084B IT8967317A IT6731789A IT1232084B IT 1232084 B IT1232084 B IT 1232084B IT 8967317 A IT8967317 A IT 8967317A IT 6731789 A IT6731789 A IT 6731789A IT 1232084 B IT1232084 B IT 1232084B
Authority
IT
Italy
Prior art keywords
audio signals
wide band
coding system
band audio
coding
Prior art date
Application number
IT8967317A
Other languages
English (en)
Other versions
IT8967317A0 (it
Inventor
Montagna Roberto
Omologo Maurizio
Sereno Daniele
Original Assignee
Cselt Centro Studi Lab Telecom
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 Cselt Centro Studi Lab Telecom filed Critical Cselt Centro Studi Lab Telecom
Priority to IT8967317A priority Critical patent/IT1232084B/it
Publication of IT8967317A0 publication Critical patent/IT8967317A0/it
Priority to EP90108332A priority patent/EP0396121B1/en
Priority to DE69028434T priority patent/DE69028434T2/de
Priority to DE199090108332T priority patent/DE396121T1/de
Priority to CA002016042A priority patent/CA2016042C/en
Application granted granted Critical
Publication of IT1232084B publication Critical patent/IT1232084B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H04B1/667—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a division in frequency subbands
    • 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
    • G10L19/002—Dynamic bit allocation
    • 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
    • G10L19/0204—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 using subband decomposition
    • 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
    • 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
    • G10L19/113—Regular pulse excitation
    • 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
    • G10L2019/0011—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
    • 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
    • G10L2019/0013—Codebook search algorithms
    • G10L2019/0014—Selection criteria for distances
    • 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
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/06—Speech 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 correlation coefficients

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
IT8967317A 1989-05-03 1989-05-03 Sistema di codifica per segnali audio a banda allargata IT1232084B (it)

Priority Applications (5)

Application Number Priority Date Filing Date Title
IT8967317A IT1232084B (it) 1989-05-03 1989-05-03 Sistema di codifica per segnali audio a banda allargata
EP90108332A EP0396121B1 (en) 1989-05-03 1990-05-02 A system for coding wide-band audio signals
DE69028434T DE69028434T2 (de) 1989-05-03 1990-05-02 System zur Codierung von Breitbandaudiosignalen
DE199090108332T DE396121T1 (de) 1989-05-03 1990-05-02 System zur codierung von breitbandaudiosignalen.
CA002016042A CA2016042C (en) 1989-05-03 1990-05-03 System for coding wide-bank audio signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8967317A IT1232084B (it) 1989-05-03 1989-05-03 Sistema di codifica per segnali audio a banda allargata

Publications (2)

Publication Number Publication Date
IT8967317A0 IT8967317A0 (it) 1989-05-03
IT1232084B true IT1232084B (it) 1992-01-23

Family

ID=11301410

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8967317A IT1232084B (it) 1989-05-03 1989-05-03 Sistema di codifica per segnali audio a banda allargata

Country Status (4)

Country Link
EP (1) EP0396121B1 (it)
CA (1) CA2016042C (it)
DE (2) DE69028434T2 (it)
IT (1) IT1232084B (it)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5754976A (en) * 1990-02-23 1998-05-19 Universite De Sherbrooke Algebraic codebook with signal-selected pulse amplitude/position combinations for fast coding of speech
DE69229974T2 (de) * 1991-02-26 2000-07-20 Nec Corp., Tokio/Tokyo Verfahren und Vorrichtung zur Kodierung von Sprachparametern
IT1257065B (it) * 1992-07-31 1996-01-05 Sip Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi.
US5717824A (en) * 1992-08-07 1998-02-10 Pacific Communication Sciences, Inc. Adaptive speech coder having code excited linear predictor with multiple codebook searches
IT1257431B (it) * 1992-12-04 1996-01-16 Sip Procedimento e dispositivo per la quantizzazione dei guadagni dell'eccitazione in codificatori della voce basati su tecniche di analisi per sintesi
BE1007617A3 (nl) * 1993-10-11 1995-08-22 Philips Electronics Nv Transmissiesysteem met gebruik van verschillende codeerprincipes.
US5506908A (en) * 1994-06-30 1996-04-09 At&T Corp. Directional microphone system
JPH09506478A (ja) * 1994-10-06 1997-06-24 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ 光放射半導体ダイオード及びこのようなダイオードの製造方法
JP2842276B2 (ja) * 1995-02-24 1998-12-24 日本電気株式会社 広帯域信号符号化装置
TW321810B (it) * 1995-10-26 1997-12-01 Sony Co Ltd
FI114248B (fi) * 1997-03-14 2004-09-15 Nokia Corp Menetelmä ja laite audiokoodaukseen ja audiodekoodaukseen
GB2326572A (en) * 1997-06-19 1998-12-23 Softsound Limited Low bit rate audio coder and decoder
JP3199020B2 (ja) * 1998-02-27 2001-08-13 日本電気株式会社 音声音楽信号の符号化装置および復号装置
FI113571B (fi) 1998-03-09 2004-05-14 Nokia Corp Puheenkoodaus
RU2393552C2 (ru) * 2004-09-17 2010-06-27 Конинклейке Филипс Электроникс Н.В. Комбинированное аудиокодирование, минимизирующее воспринимаемое искажение
WO2010003521A1 (en) * 2008-07-11 2010-01-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method and discriminator for classifying different segments of a signal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5921039B2 (ja) * 1981-11-04 1984-05-17 日本電信電話株式会社 適応予測符号化方式
EP0111612B1 (fr) * 1982-11-26 1987-06-24 International Business Machines Corporation Procédé et dispositif de codage d'un signal vocal
DE3688980T2 (de) * 1986-10-30 1994-04-21 Ibm Verfahren zur Multigeschwindigkeitskodierung von Signalen und Einrichtung zur Durchführung dieses Verfahrens.

Also Published As

Publication number Publication date
EP0396121A1 (en) 1990-11-07
DE396121T1 (de) 1991-03-21
DE69028434D1 (de) 1996-10-17
IT8967317A0 (it) 1989-05-03
EP0396121B1 (en) 1996-09-11
DE69028434T2 (de) 1997-02-20
CA2016042C (en) 1998-04-28
CA2016042A1 (en) 1990-11-03

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19950419