EP2347411A1 - Vor-echo-dämpfung in einem digitalaudiosignal - Google Patents

Vor-echo-dämpfung in einem digitalaudiosignal

Info

Publication number: EP2347411A1
Authority: EP; European Patent Office
Prior art keywords: sub; signal; attenuation; block; blocks
Prior art date: 2008-09-17
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

EP09747881A

Other languages

English (en)

French (fr)

Other versions

EP2347411B1 (de

Inventor

Balazs Kovesi

Stéphane 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.)

2008-09-17

Filing date

2009-09-15

Publication date

2011-07-27

2009-09-15 Application filed by France Telecom SA filed Critical France Telecom SA

2011-07-27 Publication of EP2347411A1 publication Critical patent/EP2347411A1/de

2012-12-05 Application granted granted Critical

2012-12-05 Publication of EP2347411B1 publication Critical patent/EP2347411B1/de

Status Active legal-status Critical Current

2029-09-15 Anticipated expiration legal-status Critical

Links

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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
- 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
- G10L19/0212—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 orthogonal transformation
- 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
- G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
- G10L19/025—Detection of transients or attacks for time/frequency resolution switching

Definitions

the attenuation factor is determined according to the temporal envelope of said sub-block, the maximum of the temporal envelope of the sub-block comprising said transition and the temporal envelope. of the reconstructed signal of the previous frame.
smoothing functions are possible, such as, for example, a linear transition between the two factor values, either with a constant slope (for example in steps of 0.05) or with a fixed length (for example, on 16 samples).
the frame that precedes the pre-echo frame has a homogeneous energy that corresponds to the energy of the background noise at that time. According to the experience it is not useful or even desirable that the signal energy becomes lower than the average energy of the previous frame after pre-echo processing.
the factor 1 value must be assigned to the last samples of the frame.
the problem is that on the concatenated signal the position of the attack can not be determined with certainty due to the symmetry of this part of the concatenated signal which in fact reflects the well-known "time folding" property of the MDCT transform .

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)

EP09747881A 2008-09-17 2009-09-15 Vor-echo-dämpfung in einem digitalaudiosignal Active EP2347411B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR0856248		2008-09-17
PCT/FR2009/051724 WO2010031951A1 (fr)	2008-09-17	2009-09-15	Attenuation de pre-echos dans un signal audionumerique

Publications (2)

Publication Number	Publication Date
EP2347411A1 true EP2347411A1 (de)	2011-07-27
EP2347411B1 EP2347411B1 (de)	2012-12-05

Family

ID=40174728

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP09747881A Active EP2347411B1 (de)	2008-09-17	2009-09-15	Vor-echo-dämpfung in einem digitalaudiosignal

Country Status (8)

Country	Link
US (1)	US8676365B2 (de)
EP (1)	EP2347411B1 (de)
JP (1)	JP5295372B2 (de)
KR (1)	KR101655913B1 (de)
CN (1)	CN102160114B (de)
ES (1)	ES2400987T3 (de)
RU (1)	RU2481650C2 (de)
WO (1)	WO2010031951A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
PL2473995T3 (pl) *	2009-10-20	2015-06-30	Fraunhofer Ges Forschung	Koder sygnału audio, dekoder sygnału audio, sposób dostarczania zakodowanej reprezentacji treści audio, sposób dostarczania dekodowanej reprezentacji treści audio oraz program komputerowy do wykorzystania w zastosowaniach z małym opóźnieniem
FR2992766A1 (fr) *	2012-06-29	2014-01-03	France Telecom	Attenuation efficace de pre-echos dans un signal audionumerique
FR3000328A1 (fr)	2012-12-21	2014-06-27	France Telecom	Attenuation efficace de pre-echos dans un signal audionumerique
EP2830064A1 (de)	2013-07-22	2015-01-28	Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.	Vorrichtung und Verfahren zur Decodierung und Codierung eines Audiosignals unter Verwendung adaptiver Spektralabschnittsauswahl
FR3025923A1 (fr)	2014-09-12	2016-03-18	Orange	Discrimination et attenuation de pre-echos dans un signal audionumerique
US10354667B2 (en) *	2017-03-22	2019-07-16	Immersion Networks, Inc.	System and method for processing audio data

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FR2674710B1 (fr) *	1991-03-27	1994-11-04	France Telecom	Procede et systeme de traitement des preechos d'un signal audio-numerique code par transformee frequentielle.
DE19736669C1 (de) *	1997-08-22	1998-10-22	Fraunhofer Ges Forschung	Verfahren und Vorrichtung zum Erfassen eines Anschlags in einem zeitdiskreten Audiosignal sowie Vorrichtung und Verfahren zum Codieren eines Audiosignals
CN100449628C (zh) *	2001-11-16	2009-01-07	皇家飞利浦电子股份有限公司	调整附加数据信号的方法和装置及设备
JP4290917B2 (ja) *	2002-02-08	2009-07-08	株式会社エヌ・ティ・ティ・ドコモ	復号装置、符号化装置、復号方法、及び、符号化方法
CN1458646A (zh) *	2003-04-21	2003-11-26	北京阜国数字技术有限公司	一种滤波参数矢量量化和结合量化模型预测的音频编码方法
DE10324438A1 (de) *	2003-05-28	2004-12-16	Knorr-Bremse Systeme für Schienenfahrzeuge GmbH	Bremsvorrichtung eines Schienenfahrzeugs
SE527670C2 (sv) *	2003-12-19	2006-05-09	Ericsson Telefon Ab L M	Naturtrogenhetsoptimerad kodning med variabel ramlängd
CA2574468C (en) *	2005-04-28	2014-01-14	Siemens Aktiengesellschaft	Noise suppression process and device
RU2351024C2 (ru) *	2005-04-28	2009-03-27	Сименс Акциенгезелльшафт	Способ и устройство для подавления шумов
DE102005019863A1 (de) *	2005-04-28	2006-11-02	Siemens Ag	Verfahren und Vorrichtung zur Geräuschunterdrückung
CN101228574A (zh) *	2005-09-08	2008-07-23	北京阜国数字技术有限公司	一种控制前回声的编码和解码装置及方法
FR2897733A1 (fr) *	2006-02-20	2007-08-24	France Telecom	Procede de discrimination et d'attenuation fiabilisees des echos d'un signal numerique dans un decodeur et dispositif correspondant
KR100880995B1 (ko) *	2007-01-25	2009-02-03	후지쯔 가부시끼가이샤	오디오 부호화 장치 및 오디오 부호화 방법

2009
- 2009-09-15 KR KR1020117008793A patent/KR101655913B1/ko active IP Right Grant
- 2009-09-15 US US13/063,002 patent/US8676365B2/en active Active
- 2009-09-15 WO PCT/FR2009/051724 patent/WO2010031951A1/fr active Application Filing
- 2009-09-15 CN CN2009801363279A patent/CN102160114B/zh active Active
- 2009-09-15 ES ES09747881T patent/ES2400987T3/es active Active
- 2009-09-15 JP JP2011527373A patent/JP5295372B2/ja active Active
- 2009-09-15 EP EP09747881A patent/EP2347411B1/de active Active
- 2009-09-15 RU RU2011115003/08A patent/RU2481650C2/ru active

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010031951A1 *

Also Published As

Publication number	Publication date
CN102160114A (zh)	2011-08-17
US20110178617A1 (en)	2011-07-21
ES2400987T3 (es)	2013-04-16
RU2011115003A (ru)	2012-10-27
WO2010031951A1 (fr)	2010-03-25
KR101655913B1 (ko)	2016-09-08
JP2012503214A (ja)	2012-02-02
JP5295372B2 (ja)	2013-09-18
US8676365B2 (en)	2014-03-18
KR20110076936A (ko)	2011-07-06
CN102160114B (zh)	2012-08-29
RU2481650C2 (ru)	2013-05-10
EP2347411B1 (de)	2012-12-05

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