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1. WO2006053841 - METHOD FOR THE PREDICTIVE CODING OF AN IMAGE SEQUENCE AND CORRESPONDING CODING DEVICE, DECODING METHOD AND DEVICE AND PROGRAM

Publication Number WO/2006/053841
Publication Date 26.05.2006
International Application No. PCT/EP2005/055796
International Filing Date 07.11.2005
IPC
G06T 9/00 2006.1
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
9Image coding
H04N 7/26 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
24Systems for the transmission of television signals using pulse code modulation
26using bandwidth reduction
CPC
H04N 19/105
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
103Selection of coding mode or of prediction mode
105Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
H04N 19/61
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
61in combination with predictive coding
H04N 19/63
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
63using sub-band based transform, e.g. wavelets
Applicants
  • FRANCE TELECOM [FR]/[FR] (AllExceptUS)
  • BRANGOULO, Sébastien [FR]/[FR] (UsOnly)
  • GIOIA, Patrick [FR]/[FR] (UsOnly)
Inventors
  • BRANGOULO, Sébastien
  • GIOIA, Patrick
Agents
  • BIORET, Ludovic
Priority Data
041233519.11.2004FR
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR THE PREDICTIVE CODING OF AN IMAGE SEQUENCE AND CORRESPONDING CODING DEVICE, DECODING METHOD AND DEVICE AND PROGRAM
(FR) PROCEDE DE CODAGE PREDICTIF D'UNE SEQUENCE D'IMAGES, DISPOSITIF DE CODAGE, PROCEDE ET DISPOSITIF DE DECODAGE ET PROGRAMME CORRESPONDANTS
Abstract
(EN) The invention relates to a method for the coding of a sequence of images, in which each of the images is associated with (i) a basic mesh formed by a set of faces that are defined by a set of vertices and edges and (ii) coefficients in a base of wavelets corresponding to local modifications to the basic mesh, known as wavelet coefficients. The inventive method comprises the following steps: coding (61) of the basic mesh and the wavelet coefficients associated with at least one reference image from the sequence of images; temporal prediction (63) of at least some of the wavelet coefficients which are associated with at least one current image from the image sequence, as a function of the wavelet coefficients associated with at least one preceding and/or following image from the image sequence, such as to supply predicted wavelet coefficients; determination of difference information (64) between the predicted wavelet coefficients and the corresponding real wavelet coefficients; and coding of said difference information.
(FR) L'invent ion concerne un procédé de codage d'une séquence d'images, chacune desdites images étant associée à un maillage de base constitué d'un ensemble de facettes définies par un ensemble de sommets et d'arêtes, et à des coefficients dans une base d'ondelettes correspondant à des modifications locales dudit maillage de base, dits coefficients d'ondelettes, comprenant les étapes suivantes : codage (61) dudit maillage de base et des coefficients d'ondelettes associés à au moins une image de référence de ladite séquence d'images ; prédict ion temporelle (63) d'au moins certains coefficients d'ondelettes associés à au moins une image courante de ladite séquence d'images, en fonction de coefficients d'ondelettes associés à au moins une image précédente et/ou suivante de ladite séquence d'images, de façon à fournir des coefficients d'ondelettes prédits ; déterminat ion d'informations de différence (64) entre lesdits coefficients d'ondelettes prédits et les coefficients d'ondelettes réels correspondants ; codage desdites informations de différence.
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