MX349600B - Atenuacion efectiva de pre-eco en una señal digital de audio. - Google Patents

Atenuacion efectiva de pre-eco en una señal digital de audio.

Info

Publication number
MX349600B
MX349600B MX2014015065A MX2014015065A MX349600B MX 349600 B MX349600 B MX 349600B MX 2014015065 A MX2014015065 A MX 2014015065A MX 2014015065 A MX2014015065 A MX 2014015065A MX 349600 B MX349600 B MX 349600B
Authority
MX
Mexico
Prior art keywords
echo
attack
attenuation
digital audio
audio signal
Prior art date
Application number
MX2014015065A
Other languages
English (en)
Other versions
MX2014015065A (es
Inventor
Kovesi Balazs
Ragot Stephane
Original Assignee
Orange
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 Orange filed Critical Orange
Publication of MX2014015065A publication Critical patent/MX2014015065A/es
Publication of MX349600B publication Critical patent/MX349600B/es

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
    • G10L19/02—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
    • G10L19/03—Spectral prediction for preventing pre-echo; Temporary noise shaping [TNS], e.g. in MPEG2 or MPEG4
    • 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
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

La presente invención se refiere a un método para procesar atenuación de pre-eco en una señal digital de audio generada a partir de una codificación de transformada, en donde, en el punto de codificación, el método comprende los pasos de: detección (Detecc.) de una posición de ataque en la señal decodificada; determinación (ZPE) de una zona de pre-eco que precede a la posición de ataque detectada en la señal decodificada; cálculo (E. Ate.) de factores de atenuación por sub-bloque de la región de pre-eco, de acuerdo con al menos la trama en donde el ataque ha sido detectado y la trama precedente; y atenuación de pre-eco (Ate.) en los sub-bloques de la zona de pre-eco por los factores de atenuación correspondientes. El método también comprende la aplicación de un filtro (F) para formar el espectro de la zona de pre-eco en la trama actual hasta la posición detectada del ataque. La invención también se refiere a un dispositivo que implementa dicho método y a un decodificador que comprende tal dispositivo.
MX2014015065A 2012-06-29 2013-06-28 Atenuacion efectiva de pre-eco en una señal digital de audio. MX349600B (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1256285A FR2992766A1 (fr) 2012-06-29 2012-06-29 Attenuation efficace de pre-echos dans un signal audionumerique
PCT/FR2013/051517 WO2014001730A1 (fr) 2012-06-29 2013-06-28 Atténuation efficace de pré-échos dans un signal audionumérique

Publications (2)

Publication Number Publication Date
MX2014015065A MX2014015065A (es) 2015-02-17
MX349600B true MX349600B (es) 2017-08-03

Family

ID=47191858

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2014015065A MX349600B (es) 2012-06-29 2013-06-28 Atenuacion efectiva de pre-eco en una señal digital de audio.

Country Status (12)

Country Link
US (1) US9489964B2 (es)
EP (1) EP2867893B1 (es)
JP (1) JP6271531B2 (es)
KR (1) KR102082156B1 (es)
CN (1) CN104395958B (es)
BR (1) BR112014032587B1 (es)
CA (1) CA2874965C (es)
ES (1) ES2711132T3 (es)
FR (1) FR2992766A1 (es)
MX (1) MX349600B (es)
RU (1) RU2607418C2 (es)
WO (1) WO2014001730A1 (es)

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FR2992766A1 (fr) * 2012-06-29 2014-01-03 France Telecom Attenuation efficace de pre-echos dans un signal audionumerique
FR3023646A1 (fr) * 2014-07-11 2016-01-15 Orange Mise a jour des etats d'un post-traitement a une frequence d'echantillonnage variable selon la trame
FR3025923A1 (fr) * 2014-09-12 2016-03-18 Orange Discrimination et attenuation de pre-echos dans un signal audionumerique
EP3382701A1 (en) 2017-03-31 2018-10-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for post-processing an audio signal using prediction based shaping
EP3382700A1 (en) * 2017-03-31 2018-10-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for post-processing an audio signal using a transient location detection
EP3483880A1 (en) * 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Temporal noise shaping
EP3483882A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Controlling bandwidth in encoders and/or decoders
EP3483878A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio decoder supporting a set of different loss concealment tools
WO2019091576A1 (en) 2017-11-10 2019-05-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoders, audio decoders, methods and computer programs adapting an encoding and decoding of least significant bits
EP3483884A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Signal filtering
EP3483883A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio coding and decoding with selective postfiltering
WO2019091573A1 (en) 2017-11-10 2019-05-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for encoding and decoding an audio signal using downsampling or interpolation of scale parameters
EP3483879A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Analysis/synthesis windowing function for modulated lapped transformation
EP3483886A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Selecting pitch lag

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FR3000328A1 (fr) * 2012-12-21 2014-06-27 France Telecom Attenuation efficace de pre-echos dans un signal audionumerique

Also Published As

Publication number Publication date
BR112014032587A2 (pt) 2017-06-27
CN104395958B (zh) 2017-09-05
KR102082156B1 (ko) 2020-04-14
CA2874965C (fr) 2021-01-19
FR2992766A1 (fr) 2014-01-03
BR112014032587B1 (pt) 2022-08-09
ES2711132T3 (es) 2019-04-30
US20150170668A1 (en) 2015-06-18
RU2607418C2 (ru) 2017-01-10
EP2867893B1 (fr) 2018-11-28
EP2867893A1 (fr) 2015-05-06
JP2015522847A (ja) 2015-08-06
CN104395958A (zh) 2015-03-04
MX2014015065A (es) 2015-02-17
KR20150052812A (ko) 2015-05-14
RU2015102814A (ru) 2016-08-20
CA2874965A1 (fr) 2014-01-03
US9489964B2 (en) 2016-11-08
WO2014001730A1 (fr) 2014-01-03
JP6271531B2 (ja) 2018-01-31

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