WO2009010672A3 - Limitation de distorsion introduite par un post-traitement au decodage d'un signal numerique - Google Patents

Limitation de distorsion introduite par un post-traitement au decodage d'un signal numerique Download PDF

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Publication number
WO2009010672A3
WO2009010672A3 PCT/FR2008/051246 FR2008051246W WO2009010672A3 WO 2009010672 A3 WO2009010672 A3 WO 2009010672A3 FR 2008051246 W FR2008051246 W FR 2008051246W WO 2009010672 A3 WO2009010672 A3 WO 2009010672A3
Authority
WO
WIPO (PCT)
Prior art keywords
post
current amplitude
processing step
limitation
digital signal
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.)
Ceased
Application number
PCT/FR2008/051246
Other languages
English (en)
Other versions
WO2009010672A2 (fr
Inventor
Balazs Kovesi
Stephane Ragot
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
Priority to JP2010514083A priority Critical patent/JP5179578B2/ja
Priority to US12/667,908 priority patent/US8571856B2/en
Priority to CN2008801061787A priority patent/CN101816041B/zh
Priority to EP08806164A priority patent/EP2162883B1/fr
Publication of WO2009010672A2 publication Critical patent/WO2009010672A2/fr
Publication of WO2009010672A3 publication Critical patent/WO2009010672A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • G10L19/26—Pre-filtering or post-filtering
    • 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
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation

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)
  • Analogue/Digital Conversion (AREA)

Abstract

L'invention propose le traitement d'un signal numérique, issu d'un décodeur et d'un post-traitement de réduction de bruit, avec, en particulier, une limitation d'une distorsion introduite par le post-traitement pour délivrer un signal de sortie corrigé (SOUT), en affectant à ce signal de sortie corrigé (SOUT) : une amplitude courante ayant une valeur intermédiaire entre une valeur d'amplitude courante du signal post-traité (SPOST) et une valeur d'amplitude courante correspondante du signal décodé (S'MIC), ou l'amplitude courante du signal post-traité (SPOST), selon les valeurs prises respectivement par l'amplitude courante du signal post- traité (SPOST) et par l'amplitude courante correspondante du signal décodé (S'MIC).
PCT/FR2008/051246 2007-07-06 2008-07-04 Limitation de distorsion introduite par un post-traitement au decodage d'un signal numerique Ceased WO2009010672A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2010514083A JP5179578B2 (ja) 2007-07-06 2008-07-04 ディジタル信号の復号中に後処理ステップによってもたらされるひずみの制限
US12/667,908 US8571856B2 (en) 2007-07-06 2008-07-04 Limitation of distortion introduced by a post-processing step during digital signal decoding
CN2008801061787A CN101816041B (zh) 2007-07-06 2008-07-04 限制音频数字信号解码过程中的后处理步骤引起的失真的方法和装置
EP08806164A EP2162883B1 (fr) 2007-07-06 2008-07-04 Limitation de distorsion introduite par un post-traitement au decodage d'un signal numerique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR07/04901 2007-07-06
FR0704901 2007-07-06

Publications (2)

Publication Number Publication Date
WO2009010672A2 WO2009010672A2 (fr) 2009-01-22
WO2009010672A3 true WO2009010672A3 (fr) 2009-03-05

Family

ID=39027290

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2008/051246 Ceased WO2009010672A2 (fr) 2007-07-06 2008-07-04 Limitation de distorsion introduite par un post-traitement au decodage d'un signal numerique

Country Status (6)

Country Link
US (1) US8571856B2 (fr)
EP (1) EP2162883B1 (fr)
JP (1) JP5179578B2 (fr)
KR (1) KR101470940B1 (fr)
CN (1) CN101816041B (fr)
WO (1) WO2009010672A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3079153B1 (fr) * 2010-07-02 2018-08-01 Dolby International AB Décodage audio avec post-filtrage sélectif
US20250097852A1 (en) * 2023-09-20 2025-03-20 Qualcomm Incorporated Filter-based time-averaged radio frequency exposure evaluation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005041170A1 (fr) * 2003-10-24 2005-05-06 Nokia Corpration Postfiltrage dependant du bruit
US20060217970A1 (en) * 2005-03-28 2006-09-28 Tellabs Operations, Inc. Method and apparatus for noise reduction

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042069A (en) * 1989-04-18 1991-08-20 Pacific Communications Sciences, Inc. Methods and apparatus for reconstructing non-quantized adaptively transformed voice signals
JPH03116197A (ja) * 1989-09-29 1991-05-17 Matsushita Electric Ind Co Ltd 音声復号化装置
JP3071800B2 (ja) * 1990-02-23 2000-07-31 株式会社東芝 適応ポストフィルタ
US5491514A (en) * 1993-01-28 1996-02-13 Matsushita Electric Industrial Co., Ltd. Coding apparatus, decoding apparatus, coding-decoding apparatus for video signals, and optical disks conforming thereto
JP4249414B2 (ja) * 1999-10-08 2009-04-02 株式会社ケンウッド ディジタル信号を補間する方法および装置
WO2004004297A2 (fr) * 2002-07-01 2004-01-08 Koninklijke Philips Electronics N.V. Systeme d'optimisation audio en fonction de l'energie spectrale fixe
KR20050025583A (ko) * 2002-07-08 2005-03-14 코닌클리케 필립스 일렉트로닉스 엔.브이. 오디오 처리
US6839010B1 (en) * 2002-12-27 2005-01-04 Zilog, Inc. Sigma-delta analog-to-digital converter with reduced quantization noise
JP4311034B2 (ja) * 2003-02-14 2009-08-12 沖電気工業株式会社 帯域復元装置及び電話機
ATE356405T1 (de) * 2003-07-07 2007-03-15 Koninkl Philips Electronics Nv System und verfahren zur signalverarbeitung
US6950048B1 (en) * 2004-04-02 2005-09-27 Tektronix, Inc. Dither system for a quantizing device
US7787563B2 (en) * 2004-12-08 2010-08-31 Texas Instruments Incorporated Transmitter for wireless applications incorporation spectral emission shaping sigma delta modulator
JP4074656B2 (ja) * 2005-03-07 2008-04-09 ティーオーエー株式会社 騒音除去装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005041170A1 (fr) * 2003-10-24 2005-05-06 Nokia Corpration Postfiltrage dependant du bruit
US20060217970A1 (en) * 2005-03-28 2006-09-28 Tellabs Operations, Inc. Method and apparatus for noise reduction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YAMATO K ET AL: "Post-processing noise suppressor with adaptive gain-flooring for cell-phone handsets and IC recorders", 2007 DIGEST OF TECHNICAL PAPERS. INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS, 10 January 2007 (2007-01-10) - 14 January 2007 (2007-01-14), LAS VEGAS, NV, USA, pages 2 pp., XP002470252, ISBN: 1-4244-0762-4, Retrieved from the Internet <URL:http://ieeexplore.ieee.org/iel5/4145986/4099325/04146097.pdf?tp=&arnumber=4146097&isnumber=4099325> [retrieved on 20070222] *

Also Published As

Publication number Publication date
EP2162883A2 (fr) 2010-03-17
JP2010532875A (ja) 2010-10-14
JP5179578B2 (ja) 2013-04-10
EP2162883B1 (fr) 2012-09-05
KR101470940B1 (ko) 2014-12-09
US20100241427A1 (en) 2010-09-23
CN101816041B (zh) 2012-12-26
WO2009010672A2 (fr) 2009-01-22
CN101816041A (zh) 2010-08-25
KR20100042251A (ko) 2010-04-23
US8571856B2 (en) 2013-10-29

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