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1. (WO1998053613) APPARATUS, METHOD AND COMPUTER READABLE MEDIUM FOR SCALABLE CODING OF VIDEO INFORMATION
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/053613 International Application No.: PCT/US1998/008193
Publication Date: 26.11.1998 International Filing Date: 21.04.1998
IPC:
H04N 7/26 (2006.01) ,H04N 7/30 (2006.01) ,H04N 7/50 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
24
Systems for the transmission of television signals using pulse code modulation
26
using bandwidth reduction
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
24
Systems for the transmission of television signals using pulse code modulation
26
using bandwidth reduction
30
involving transform coding
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
24
Systems for the transmission of television signals using pulse code modulation
26
using bandwidth reduction
50
involving transform and predictive coding
Applicants:
MOTOROLA INC. [US/US]; 1303 East Algonquin Road Schaumburg, IL 60196, US
Inventors:
ROBERS, Marshall, A.; US
BANHAM, Mark, R.; US
KATSAGGELOS, Aggelos, K.; US
Agent:
STOCKLEY, Darleen, J. ; Motorola Inc. Intellectual Property Dept. 1303 East Algonquin Road Schaumburg, IL 60196, US
Priority Data:
08/859,58420.05.1997US
Title (EN) APPARATUS, METHOD AND COMPUTER READABLE MEDIUM FOR SCALABLE CODING OF VIDEO INFORMATION
(FR) APPAREIL, PROCEDE ET SUPPORT INFORMATIQUE PERMETTANT LE CODAGE SCALAIRE D'INFORMATIONS VIDEO
Abstract:
(EN) A scalable video coding method incorporating scan-based coding (104, 106) of DCT coefficients of both INTRA and INTER macroblocks, which defines motion compensation (102) from a predetermined base-layer to eliminate drift between decoder and encoder. This method also includes the use of scan-adaptive VLCs (108) to improve compression efficiency. The method permits the encoding of video sequences at similar quality and rates to the non-scalable H.263 standard, with minor departures from that standard, resulting in the generation of progressive bitstreams for use in many different applications requiring scalability.
(FR) La présente invention concerne un procédé de codage vidéo scalaire intégrant un codage sur la base des lignes de balayage (104, 106) des coefficients DCT (transformées discrètes du cosinus) tant des macroblocs INTRA que des macroblocs INTER, ce qui permet de définir une correction de mouvement (102) par rapport à une couche de base de façon à éliminer la dérive entre décodeur et codeur. Ce procédé comporte également l'utilisation des codages à longueur variable ou 'VLC' (108) s'adaptant aux lignes de balayage de façon à améliorer l'efficacité de la compression. Ce procédé permet notamment de coder au standard H.263 non scalaire des séquences vidéo en conservant des qualités et des débits similaires, et ce, sans écarts importants par rapport au standard, ce qui aboutit à la génération de trains de bits convenant à diverses applications demandant la scalarité.
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Designated States: CA
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)