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1. WO2019055347 - SELECTING CHANNEL ADJUSTMENT METHOD FOR INTER-FRAME TEMPORAL SHIFT VARIATIONS

Publication Number WO/2019/055347
Publication Date 21.03.2019
International Application No. PCT/US2018/050265
International Filing Date 10.09.2018
IPC
G10L 19/008 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
008Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
H04S 1/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS
1Two-channel systems
H04S 3/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS
3Systems employing more than two channels, e.g. quadraphonic
CPC
G10L 19/002
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
002Dynamic bit allocation
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 19/008
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
008Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
G10L 19/022
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
02using spectral analysis, e.g. transform vocoders or subband vocoders
022Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
G10L 19/22
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
16Vocoder architecture
18Vocoders using multiple modes
22Mode decision, i.e. based on audio signal content versus external parameters
G10L 21/038
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
038using band spreading techniques
Applicants
  • QUALCOMM INCORPORATED [US]/[US]
Inventors
  • CHEBIYYAM, Venkata Subrahmanyam Chandra Sekhar
  • ATTI, Venkatraman
Agents
  • ROBERTSON, Jason, E.
Priority Data
16/115,16628.08.2018US
62/557,37312.09.2017US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SELECTING CHANNEL ADJUSTMENT METHOD FOR INTER-FRAME TEMPORAL SHIFT VARIATIONS
(FR) PROCÉDÉ DE RÉGLAGE DE CANAL DE SÉLECTION POUR DES VARIATIONS DE DÉCALAGE TEMPOREL INTER-TRAMES
Abstract
(EN)
A method for multi-channel audio or speech signal processing includes receiving a reference channel and a target channel, determining a variation between a first mismatch value and a second mismatch value, and comparing the variation with a first threshold that may have a pre-determined value or may be adjusted based on a frame type or a smoothing factor. The method also includes adjusting a set of target samples of the target channel based on the variation and based on the comparison to generate an adjusted set of target samples. Adjusting the set of target samples includes selecting one among a first interpolation and a second interpolation based on the variation. The method further includes generating at least one encoded channel based on a set of reference samples and the adjusted set of target samples. The method also includes transmitting the at least one encoded channel to a second device.
(FR)
Un procédé de traitement de signal audio ou vocal multicanal consiste à recevoir un canal de référence et un canal cible, à déterminer une variation entre une première valeur de décalage et une seconde valeur de décalage, et à comparer la variation avec un premier seuil qui peut avoir une valeur prédéfinie ou peut être ajusté sur la base d'un type de trame ou d'un facteur de lissage. Le procédé consiste également à ajuster un ensemble d'échantillons cibles du canal cible sur la base de la variation et sur la base de la comparaison de sorte à générer un ensemble ajusté d'échantillons cibles. L'ajustement de l'ensemble d'échantillons cibles consiste à sélectionner entre une première interpolation et une seconde interpolation sur la base de la variation. Le procédé consiste en outre à générer au moins un canal codé sur la base de l'ensemble d'échantillons de référence et de l'ensemble ajusté d'échantillons cibles. Le procédé consiste aussi à transmettre ledit canal codé à un second dispositif.
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