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1. WO2014170617 - FRAME LOSS CORRECTION BY WEIGHTED NOISE INJECTION

Publication Number WO/2014/170617
Publication Date 23.10.2014
International Application No. PCT/FR2014/050945
International Filing Date 17.04.2014
IPC
G10L 19/005 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
005Correction of errors induced by the transmission channel, if related to the coding algorithm
G10L 21/0208 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
CPC
G10L 19/005
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
005Correction of errors induced by the transmission channel, if related to the coding algorithm
G10L 19/12
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
08Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
12the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
G10L 21/0208
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
H03M 13/00
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
13Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
Applicants
  • ORANGE [FR]/[FR]
Inventors
  • DANIEL, Jérôme
  • FAURE, Julien
Agents
  • ORANGE/IPL
Priority Data
1353551 18.04.2013FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) FRAME LOSS CORRECTION BY WEIGHTED NOISE INJECTION
(FR) CORRECTION DE PERTE DE TRAME PAR INJECTION DE BRUIT PONDÉRÉ
Abstract
(EN)
The invention relates to a method for processing a digital signal, implemented during decoding of the signal, in order to replace a succession of samples lost during decoding, the method comprising steps of: generating a structure of a signal for replacing the lost succession, this structure comprising spectral components determined from valid samples received during decoding before the succession of lost samples; generating a residue between a digital signal available to the decoder, comprising received valid samples, and a signal generated from the spectral components; and extracting blocks from the residue, method in which window weighted blocks are injected into the structure using an overlap-add approach, the injected blocks partially overlapping in time.
(FR)
L'invention concerne un procédé de traitement d'un signal numérique, mis en œuvre pendant un décodage du signal pour remplacer une succession d'échantillons perdue au décodage, le procédé comportant les étapes : - génération d'une structure d'un signal de remplacement de la succession perdue, cette structure comportant des composantes spectrales déterminées à partir d'échantillons valides reçus au décodage et antérieurs à la succession d'échantillons perdue, - génération d'un résidu entre un signal numérique disponible au décodeur comportant des échantillons valides reçus et un signal généré à partir des composantes spectrales, - extraction de blocs du résidu, procédé dans lequel on injecte les blocs dans la structure par additions avec recouvrement suivant des fenêtres de pondération de bloc, les blocs injectés se recouvrant partiellement dans le temps.
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