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1. WO2016150624 - METHOD AND APPARATUS FOR EMBEDDING AND REGAINING WATERMARKS IN AN AMBISONICS REPRESENTATION OF A SOUND FIELD

Publication Number WO/2016/150624
Publication Date 29.09.2016
International Application No. PCT/EP2016/053440
International Filing Date 18.02.2016
IPC
G10L 19/018 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
018Audio watermarking, i.e. embedding inaudible data in the audio signal
G11B 20/00 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
H04S 3/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS
3Systems employing more than two channels, e.g. quadraphonic
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
CPC
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, i.e. using interchannel correlation to reduce redundancies, e.g. joint-stereo, intensity-coding, matrixing
G10L 19/018
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
018Audio watermarking, i.e. embedding inaudible data in the audio signal
H04S 2420/11
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS 
2420Techniques used stereophonic systems covered by H04S but not provided for in its groups
11Application of ambisonics in stereophonic audio systems
H04S 3/008
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS 
3Systems employing more than two channels, e.g. quadraphonic
008in which the audio signals are in digital form, i.e. employing more than two discrete digital channels, e.g. Dolby Digital, Digital Theatre Systems [DTS]
Applicants
  • THOMSON LICENSING [FR]/[FR]
Inventors
  • CHEN, Xiaoming
  • GRIES, Ulrich
  • BAUM, Peter Georg
  • ARNOLD, Michael
Agents
  • HARTNACK, Wolfgang
Priority Data
15305427.524.03.2015EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR EMBEDDING AND REGAINING WATERMARKS IN AN AMBISONICS REPRESENTATION OF A SOUND FIELD
(FR) PROCÉDÉ ET APPAREIL POUR INTÉGRER ET RÉCUPÉRER DES FILIGRANES DANS UNE REPRÉSENTATION D'AMBIOPHONIE D'UN CHAMP SONORE
Abstract
(EN)
As a potential format for next-generation audio, techniques for embedding digital watermarks in the Higher Order Ambisonics (HOA) representation of a sound field have been proposed. The inventive embedding method is adapted for watermarking a two-dimensional or three-dimensional Ambisonics representation of a sound field, wherein the Ambisonics representation is decomposed into directional signals and ambient components and includes estimated dominant directions, and wherein the order of the ambient components can be reduced, and wherein watermark information data are embedded in the directional signals, and at receiver side are regained from the watermarked directional signals.
(FR)
L'invention concerne, en tant que format potentiel pour un son de nouvelle génération, des techniques pour intégrer des filigranes numériques dans la représentation d'ambiophonie d'ordre supérieur (HOA) d'un champ sonore. Le procédé d'incorporation de l'invention est adapté pour l'établissement de filigrane sur une représentation d'ambiophonie bidimensionnelle ou tridimensionnelle d'un champ sonore, la représentation d'ambiophonie étant décomposée en signaux directionnels et composantes ambiantes et comprenant des directions dominantes estimées, et l'ordre des composantes ambiantes pouvant être réduit, et des données d'informations de filigrane étant intégrées dans les signaux directionnels et, sur le côté récepteur, étant récupérées à partir des signaux directionnels filigranés.
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