ES2081583T3 - Procedimiento y sistema de tratamiento de los ecos previos de una señal audio digital codificada por transformada frecuencial. - Google Patents

Procedimiento y sistema de tratamiento de los ecos previos de una señal audio digital codificada por transformada frecuencial.

Info

Publication number
ES2081583T3
ES2081583T3 ES92400775T ES92400775T ES2081583T3 ES 2081583 T3 ES2081583 T3 ES 2081583T3 ES 92400775 T ES92400775 T ES 92400775T ES 92400775 T ES92400775 T ES 92400775T ES 2081583 T3 ES2081583 T3 ES 2081583T3
Authority
ES
Spain
Prior art keywords
treatment
transformation
frequential
signal coded
audio
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
ES92400775T
Other languages
English (en)
Inventor
Yannick Mahieux
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.)
Orange SA
Original Assignee
France Telecom 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 France Telecom SA filed Critical France Telecom SA
Application granted granted Critical
Publication of ES2081583T3 publication Critical patent/ES2081583T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/0255—Filters based on statistics
    • H03H17/0257—KALMAN filters
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Probability & Statistics with Applications (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PROCESO Y SISTEMA DE TRATAMIENTO DE LOS PREECOS DE UNA SEÑAL AUDIONUMERICA CODIFICADA POR TRANSFORMACION FRECUENCIAL. LA INVENCION SE REFIERE A UN PROCESO Y A UN SISTEMA DE TRATAMIENTO DE LOS PREECOS DE UNA SEÑAL AUDIONUMERICA CODIFICADA POR TRANSFORMACION FRECUENCIAL. EL PROCESO Y EL SISTEMA, TRAS LA CODIFICACION DE LA SEÑAL POR TRANSFORMACION SECUENCIAL EN COEFICIENTES Y(K), SOBRE VENTANAS DE PONDERACION FORMADAS POR BLOQUES DE MUESTRA X(N) QUE COMPRENDEN N MUESTRAS SUCESIVAS PERMITEN EFECTUAR, EN LA DECODIFICACION DE LOS COEFICIENTES DE TRANSFORMACION Y(K), UN FILTRADO OPTIMO DEL TIPO FILTRADO DE KALMAN DE MANERA A REDUCIR DURANTE LA PRESENCIA DE UNA TRANSICION DE AMPLITUD DE LA SEÑAL EL RUIDO ADITIVO RESULTANTE, DURANTE LA CODIFICACION, DE LA CUANTIFICACION DE LOS COEFICIENTES DE TRANSFORMACION. APLICACION EN EL TRATAMIENTO, EN EL ALMACENAMIENTO Y EN LA TRANSMISION DE SEÑALES AUDIONUMERICAS CON CALIDAD DE ALTA FIDELIDAD.
ES92400775T 1991-03-27 1992-03-23 Procedimiento y sistema de tratamiento de los ecos previos de una señal audio digital codificada por transformada frecuencial. Expired - Lifetime ES2081583T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9103715A FR2674710B1 (fr) 1991-03-27 1991-03-27 Procede et systeme de traitement des preechos d'un signal audio-numerique code par transformee frequentielle.

Publications (1)

Publication Number Publication Date
ES2081583T3 true ES2081583T3 (es) 1996-03-16

Family

ID=9411189

Family Applications (1)

Application Number Title Priority Date Filing Date
ES92400775T Expired - Lifetime ES2081583T3 (es) 1991-03-27 1992-03-23 Procedimiento y sistema de tratamiento de los ecos previos de una señal audio digital codificada por transformada frecuencial.

Country Status (7)

Country Link
US (1) US5311549A (es)
EP (1) EP0506535B1 (es)
JP (1) JPH0590974A (es)
CA (1) CA2063954A1 (es)
DE (1) DE69206300T2 (es)
ES (1) ES2081583T3 (es)
FR (1) FR2674710B1 (es)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2687871B1 (fr) * 1992-02-25 1995-07-07 France Telecom Procede et dispositif de filtrage pour la reduction des preechos d'un signal audio-numerique.
JPH06112909A (ja) * 1992-09-28 1994-04-22 Sony Corp 改良ｄｃｔの信号変換装置
JP3277682B2 (ja) * 1994-04-22 2002-04-22 ソニー株式会社 情報符号化方法及び装置、情報復号化方法及び装置、並びに情報記録媒体及び情報伝送方法
US5801652A (en) * 1994-07-08 1998-09-01 Cirrus Logic, Inc. Pattern dependent noise reduction in a digital processing circuit utilizing image circuitry
US5719572A (en) * 1994-07-08 1998-02-17 Cirrus Logic, Inc. Digital signal processor with reduced pattern dependent noise
GB2327577B (en) 1997-07-18 2002-09-11 British Broadcasting Corp Re-encoding decoded signals
FR2802041A1 (fr) * 1999-12-07 2001-06-08 Koninkl Philips Electronics Nv Methode de detection de blocs pour canal soumis a evanouissement
US7711123B2 (en) * 2001-04-13 2010-05-04 Dolby Laboratories Licensing Corporation Segmenting audio signals into auditory events
DK1386312T3 (da) * 2001-05-10 2008-06-09 Dolby Lab Licensing Corp Forbedring af transient ydeevne af audio kodningssystemer med lav bithastighed ved reduktion af forudgående stöj
US8171303B2 (en) * 2004-11-03 2012-05-01 Astav, Inc. Authenticating a login
KR20080097178A (ko) * 2006-01-18 2008-11-04 연세대학교 산학협력단 부호화/복호화 장치 및 방법
RU2481650C2 (ru) * 2008-09-17 2013-05-10 Франс Телеком Ослабление опережающих эхо-сигналов в цифровом звуковом сигнале
KR101546849B1 (ko) 2009-01-05 2015-08-24 삼성전자주식회사 주파수 영역에서의 음장효과 생성 방법 및 장치
CN101527139B (zh) * 2009-02-16 2012-03-28 成都九洲电子信息系统股份有限公司 一种音频编码解码方法及其装置
JP6039678B2 (ja) * 2011-10-27 2016-12-07 エルジー エレクトロニクス インコーポレイティド 音声信号符号化方法及び復号化方法とこれを利用する装置
FR2992766A1 (fr) * 2012-06-29 2014-01-03 France Telecom Attenuation efficace de pre-echos dans un signal audionumerique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3806416A1 (de) * 1988-02-29 1989-09-07 Fraunhofer Ges Forschung Verfahren zur reduzierung sog. vorechos bei der uebertragung und/oder speicherung von akustischen signalen
US5079621A (en) * 1990-06-29 1992-01-07 Eastman Kodak Company Dct transform compression, transmission and recovery of digital color using virtual filtering mechanism

Also Published As

Publication number Publication date
FR2674710A1 (fr) 1992-10-02
CA2063954A1 (en) 1992-09-28
EP0506535B1 (fr) 1995-11-29
DE69206300D1 (de) 1996-01-11
FR2674710B1 (fr) 1994-11-04
JPH0590974A (ja) 1993-04-09
US5311549A (en) 1994-05-10
EP0506535A1 (fr) 1992-09-30
DE69206300T2 (de) 1996-04-18

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