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1. WO2020208137 - AUDIO DECODER, APPARATUS FOR DETERMINING A SET OF VALUES DEFINING CHARACTERISTICS OF A FILTER, METHODS FOR PROVIDING A DECODED AUDIO REPRESENTATION, METHODS FOR DETERMINING A SET OF VALUES DEFINING CHARACTERISTICS OF A FILTER AND COMPUTER PROGRAM

Publication Number WO/2020/208137
Publication Date 15.10.2020
International Application No. PCT/EP2020/060148
International Filing Date 09.04.2020
IPC
G10L 19/26 2013.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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
04using predictive techniques
26Pre-filtering or post-filtering
G10L 25/30 2013.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
25Speech or voice analysis techniques not restricted to a single one of groups G10L15/-G10L21/129
27characterised by the analysis technique
30using neural networks
G10L 21/0232 2013.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02Speech enhancement, e.g. noise reduction or echo cancellation
0208Noise filtering
0216characterised by the method used for estimating noise
0232Processing in the frequency domain
CPC
G10L 19/26
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
26Pre-filtering or post-filtering
G10L 21/0232
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02Speech enhancement, e.g. noise reduction or echo cancellation
0208Noise filtering
0216characterised by the method used for estimating noise
0232Processing in the frequency domain
G10L 25/30
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
25Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
27characterised by the analysis technique
30using neural networks
Applicants
  • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE]/[DE]
Inventors
  • FUCHS, Guillaume
  • KORSE, Srikanth
  • RAVELLI, Emmanuel
Agents
  • BURGER, Markus
  • ZIMMERMANN, Tankred
  • STÖCKELER, Ferdinand
  • ZINKLER, Franz
  • SCHENK, Markus
  • HERSINA, Günter
  • SCHAIRER, Oliver
  • SCHLENKER, Julian
  • PFITZNER, Hannes
  • KÖNIG, Andreas
Priority Data
PCT/EP2019/05935511.04.2019EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) AUDIO DECODER, APPARATUS FOR DETERMINING A SET OF VALUES DEFINING CHARACTERISTICS OF A FILTER, METHODS FOR PROVIDING A DECODED AUDIO REPRESENTATION, METHODS FOR DETERMINING A SET OF VALUES DEFINING CHARACTERISTICS OF A FILTER AND COMPUTER PROGRAM
(FR) DÉCODEUR AUDIO, APPAREIL DE DÉTERMINATION D'UN ENSEMBLE DE VALEURS DÉFINISSANT LES CARACTÉRISTIQUES D'UN FILTRE, PROCÉDÉS DE FOURNITURE D'UNE REPRÉSENTATION AUDIO DÉCODÉE, PROCÉDÉS DE DÉTERMINATION D'UN ENSEMBLE DE VALEURS DÉFINISSANT LES CARACTÉRISTIQUES D'UN FILTRE ET PROGRAMME INFORMATIQUE
Abstract
(EN)
An audio decoder for providing a decoded audio representation on the basis of an encoded audio representation comprises a filter for providing an enhanced audio representation of the decoded audio representation. The filter is configured to obtain a plurality of scaling values, which are associated with different frequency bins or frequency ranges, on the basis of spectral values of the decoded audio representation which are associated with different frequency bins or frequency ranges, and the filter is configured to scale spectral values of the decoded audio signal representation, or a pre-processed version thereof, using the scaling values, to obtain the enhanced audio representation. An apparatus for determining a set of values defining characteristics of a filter for providing an enhanced audio representation on the basis of a decoded audio representation (122;322) is also described.
(FR)
La présente invention concerne un décodeur audio permettant de fournir une représentation audio décodée sur la base d'une représentation audio codée qui comprend un filtre permettant de fournir une représentation audio améliorée de la représentation audio décodée. Le filtre est configuré pour obtenir une pluralité de valeurs de mise à l'échelle, qui sont associées à différents segments de fréquences ou plages de fréquences, sur la base de valeurs spectrales de la représentation audio décodée qui sont associées à différents segments de fréquences ou plages de fréquences, et le filtre est configuré pour mettre à l'échelle les valeurs spectrales de la représentation de signal audio décodée, ou une version prétraitée de celle-ci, à l'aide des valeurs de mise à l'échelle, pour obtenir la représentation audio améliorée. L'invention concerne également un appareil permettant de déterminer un ensemble de valeurs définissant les caractéristiques d'un filtre pour fournir une représentation audio améliorée sur la base d'une représentation audio décodée (122 ; 322).
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