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1. (WO1992010061) SYSTEMS AND METHODS FOR CODING EVEN FIELDS OF INTERLACED VIDEO SEQUENCES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010061 International Application No.: PCT/US1991/008816
Publication Date: 11.06.1992 International Filing Date: 03.12.1991
Chapter 2 Demand Filed: 02.07.1992
IPC:
G06T 9/00 (2006.01) ,H04N 7/26 (2006.01) ,H04N 7/30 (2006.01) ,H04N 7/46 (2006.01) ,H04N 7/50 (2006.01)
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
9
Image coding, e.g. from bit-mapped to non bit-mapped
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
32
involving predictive coding
46
using subsampling at the coder and sample restitution by interpolation at the coder or decoder
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:
THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK [US/US]; 110 Low Memorial Library New York, NY 10027-6699, US
Inventors:
WANG, Feng-Ming; US
ANASTASSIOU, Dimitris; US
Agent:
TANG, Henry, Y., S. ; Brumbaugh, Graves, Donohue & Raymond 30 Rockefeller Plaza New York, NY 10112, US
Priority Data:
621,34303.12.1990US
Title (EN) SYSTEMS AND METHODS FOR CODING EVEN FIELDS OF INTERLACED VIDEO SEQUENCES
(FR) SYSTEMES ET PROCEDES DESTINES A CODER DES TRAMES PAIRES DE SEQUENCES VIDEO ENTRELACEES
Abstract:
(EN) Multi-mode predictive interpolative systems and methods for interlaced video sequences use past even fields as well as current and past odd fields to code current even fields. Block matching units (40, 42, 44) find for each block of pixels of a current even field to be coded, the corresponding block which matches it most closely in the current odd field, the past odd field and a past even field and calculate appropriate motion vectors corresponding to the best matched blocks. Based on the best matched blocks, and averages thereof, the best mode generator (60) selects a best mode block which most closely matches the block to be coded and derives an error block representing the pixel by pixel differences between the block to be coded and the best mode block. Signals representing the error block, the mode chosen, and the motion vectors corresponding thereto are then sent for transmission for use by a decoder.
(FR) Des systèmes et procédés à interpolation, à prédiction et à modes multiples pour des séquences vidéo entrelacées utilisent des trames paires passées ainsi que des trames impaires actuelles passées en vue de coder des trames paires. Des unités d'assortiment de blocs (40, 42, 44) trouvent pour chaque bloc de pixels d'une trame paire actuelle à coder le bloc correspondant qui lui correspond le plus étroitement dans la trame impaire actuelle, la trame impaire passée et une trame paire passée et calculent les vecteurs de mouvement appropriés correspondant aux blocs les mieux assortis. Sur la base des blocs les mieux assortis et des moyennes desdits blocs, le générateur de meilleur mode (60) sélectionne un bloc de meilleur mode qui s'assortit le plus étroitement au bloc à coder et déduit un bloc d'erreurs représentant le pixel par les différences de pixel entre le bloc à coder et le bloc de meilleur mode. Des signaux représentant le bloc d'erreurs, le mode choisi et les vecteurs de mouvement correspondant sont alors envoyés pour être transmis en vue d'être utilisés par un décodeur.
Designated States: CA, JP, KR
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, MC, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0564597CA2096431