CA2006487A1 - Systeme de communication pouvant ameliorer la qualite des signaux vocaux en calculant les caracteristiques des impulsions d'excitation - Google Patents

Systeme de communication pouvant ameliorer la qualite des signaux vocaux en calculant les caracteristiques des impulsions d'excitation

Info

Publication number
CA2006487A1
CA2006487A1 CA2006487A CA2006487A CA2006487A1 CA 2006487 A1 CA2006487 A1 CA 2006487A1 CA 2006487 A CA2006487 A CA 2006487A CA 2006487 A CA2006487 A CA 2006487A CA 2006487 A1 CA2006487 A1 CA 2006487A1
Authority
CA
Canada
Prior art keywords
sound
signals
sound source
judged signal
representative
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
CA2006487A
Other languages
English (en)
Other versions
CA2006487C (fr
Inventor
Kazunori Ozawa
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.)
NEC Corp
Original Assignee
Individual
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
Priority claimed from JP63326805A external-priority patent/JPH02170199A/ja
Priority claimed from JP1001849A external-priority patent/JPH02181800A/ja
Application filed by Individual filed Critical Individual
Publication of CA2006487A1 publication Critical patent/CA2006487A1/fr
Application granted granted Critical
Publication of CA2006487C publication Critical patent/CA2006487C/fr
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
    • G10L19/04—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)
  • 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)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Analogue/Digital Conversion (AREA)
CA002006487A 1988-12-23 1989-12-22 Systeme de communication pouvant ameliorer la qualite des signaux vocaux en calculant les caracteristiques des impulsions d'excitation Expired - Fee Related CA2006487C (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP63326805A JPH02170199A (ja) 1988-12-23 1988-12-23 音声符号化復号化方式
JP326805/1988 1988-12-23
JP1001849A JPH02181800A (ja) 1989-01-06 1989-01-06 音声符号化復号化方式
JP1849/1989 1989-01-06

Publications (2)

Publication Number Publication Date
CA2006487A1 true CA2006487A1 (fr) 1990-06-23
CA2006487C CA2006487C (fr) 1994-01-11

Family

ID=26335140

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002006487A Expired - Fee Related CA2006487C (fr) 1988-12-23 1989-12-22 Systeme de communication pouvant ameliorer la qualite des signaux vocaux en calculant les caracteristiques des impulsions d'excitation

Country Status (4)

Country Link
US (1) US5091946A (fr)
EP (1) EP0374941B1 (fr)
CA (1) CA2006487C (fr)
DE (1) DE68923771T2 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230038A (en) * 1989-01-27 1993-07-20 Fielder Louis D Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio
DE69031749T2 (de) * 1989-06-14 1998-05-14 Nippon Electric Co Einrichtung und Verfahren zur Sprachkodierung mit Regular-Pulsanregung
CA2051304C (fr) * 1990-09-18 1996-03-05 Tomohiko Taniguchi Systeme de codage et de decodage de paroles
FR2668288B1 (fr) * 1990-10-19 1993-01-15 Di Francesco Renaud Procede de transmission, a bas debit, par codage celp d'un signal de parole et systeme correspondant.
CA2084323C (fr) * 1991-12-03 1996-12-03 Tetsu Taguchi Systeme de codage de signaux vocaux pouvant transmettre un signal vocal a un faible debit
JPH05307399A (ja) * 1992-05-01 1993-11-19 Sony Corp 音声分析方式
JP2655046B2 (ja) * 1993-09-13 1997-09-17 日本電気株式会社 ベクトル量子化装置
US5574825A (en) * 1994-03-14 1996-11-12 Lucent Technologies Inc. Linear prediction coefficient generation during frame erasure or packet loss
AU696092B2 (en) * 1995-01-12 1998-09-03 Digital Voice Systems, Inc. Estimation of excitation parameters
JP2778567B2 (ja) * 1995-12-23 1998-07-23 日本電気株式会社 信号符号化装置及び方法
GB2312360B (en) * 1996-04-12 2001-01-24 Olympus Optical Co Voice signal coding apparatus
JP3618217B2 (ja) * 1998-02-26 2005-02-09 パイオニア株式会社 音声のピッチ符号化方法及び音声のピッチ符号化装置並びに音声のピッチ符号化プログラムが記録された記録媒体
US6304842B1 (en) * 1999-06-30 2001-10-16 Glenayre Electronics, Inc. Location and coding of unvoiced plosives in linear predictive coding of speech
KR20070051864A (ko) * 2004-08-26 2007-05-18 마츠시타 덴끼 산교 가부시키가이샤 멀티 채널 신호 부호화 장치 및 멀티 채널 신호 복호 장치
CN100466600C (zh) * 2005-03-08 2009-03-04 华为技术有限公司 下一代网络中实现接入配置模式资源预留的方法
WO2008007616A1 (fr) * 2006-07-13 2008-01-17 Nec Corporation Dispositif, procédé et programme d'alarme relatif à une entrée de murmure non audible

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0683149B2 (ja) * 1984-04-04 1994-10-19 日本電気株式会社 音声帯域信号符号化・復号化装置
JPH0632032B2 (ja) * 1984-03-06 1994-04-27 日本電気株式会社 音声帯域信号符号化方法とその装置
US4797926A (en) * 1986-09-11 1989-01-10 American Telephone And Telegraph Company, At&T Bell Laboratories Digital speech vocoder
JP2586043B2 (ja) * 1987-05-14 1997-02-26 日本電気株式会社 マルチパルス符号化装置

Also Published As

Publication number Publication date
CA2006487C (fr) 1994-01-11
EP0374941A2 (fr) 1990-06-27
US5091946A (en) 1992-02-25
DE68923771D1 (de) 1995-09-14
EP0374941B1 (fr) 1995-08-09
EP0374941A3 (fr) 1991-10-16
DE68923771T2 (de) 1995-12-14

Similar Documents

Publication Publication Date Title
EP0374941A3 (fr) Système de transmission de la parole utilisant une excitation par impulsions multiples
CA2031006A1 (fr) Codec 4,8 kilobits/s pour signaux vocaux
CA2102099A1 (fr) Vocodeur a debit variable
CA2176665A1 (fr) Methode d'adaptation du niveau de masquage du bruit dans un codeur de paroles a analyse par synthese utilisant un filtre a ponderation perceptive a court terme
CA2090159A1 (fr) Methode et appareil de codage de signaux audio utilisant un modele perceptuel
MX9602391A (es) Metodo y aparato para reproducir señales de conversacion y metodo para transmitirlas.
DE69609099D1 (de) Verfahren zur Modifikation von LPC-Koeffizienten von akustischen Signalen
EP0788091A3 (fr) Procédé et dispositif de codage et décodage de parole
GB2240013A (en) Error protection for multi-pulse speech coders
CA2165229A1 (fr) Methode et appareil pour caracteriser les signaux
CA2284220A1 (fr) Procede de signalisation d'une substitution de bruit lors du codage d'un signal audio
AU7825487A (en) Digital speech vocoder
CA2144823A1 (fr) Estimation de parametres d'excitation
TR199501637A2 (tr) Bir ses sinyalini kodlamak icin yöntem.
SE8901697D0 (sv) Foerfarande att utplacera excitationspulser i en lineaerprediktiv talkodare
TW326070B (en) The estimation method of the impulse gain for coding vocoder
CA2005665A1 (fr) Systeme de communication pouvant ameliorer la qualite des paroles au moyen d'une paire de generateurs d'impulsions
DE68913691D1 (de) System zur Sprachcodierung und -decodierung.
SE9403630L (sv) Sätt att åstadkomma ett spektralbrusviktningsfilter att använda i en talkodare
CA2110645A1 (fr) Methode et dispositif utilisant les techniques d'analyse par synthese pour quantifier les gains d'excitation dans les codeurs de paroles
CA2232446A1 (fr) Systeme de codage/decodage de sons vocaux et musicaux
CA2076606A1 (fr) Methode de detection de signaux vocaux sur une ligne de communication
US4845753A (en) Pitch detecting device
ATE225554T1 (de) Adaptive fehlerkontrolle für adpcm sprachkodierer
WO1998004046A3 (fr) Codage avance de dtmf et d'autres tonalites de signalisation

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed