Bit allocation for sequence image compression

G - Physics – 06 – K

Patent

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Details

G06K 9/36 (2006.01) G06K 9/38 (2006.01) G06K 9/46 (2006.01) H04N 7/12 (2006.01) H04N 7/26 (2006.01) H04N 7/28 (2006.01) H04N 7/50 (2006.01) H04N 11/02 (2006.01) H04N 11/04 (2006.01)

Patent

CA 2265704

The invention relates to a method and system for allocating bits for representing blocks that are transmitted in an image compressing system. In a preferred embodiment, a video telephone communications system (10) includes a video transmitting/receiving system (14) including local (22) and remote processing systems (32) separated by a communication link (18). The local processing system determines indices to be sent to a remote processing system to represent the image. Under one aspect of the invention, the local processing system determines an optimal bit allocation by employing a lambda feedback technique in selecting the indices.

L'invention se rapporte à un procédé et à un système qui servent à attribuer des bits pour des blocs de représentation qui sont transmis dans un système de compression d'image. Dans un mode de réalisation préféré, un système visiophone (10) comprend un système émetteur-récepteur vidéo (14) comprenant un système de traitement local (22) et un système de traitement à distance (32), qui sont séparés par une liaison de communication (18). Le système de traitement local détermine des indices qui doivent être envoyés au système de traitement à distance pour la représentation de l'image. Dans un mode de réalisation, le système de traitement local détermine une attribution optimale de bits au moyen d'une technique d'asservissement lambda lors de la sélection des indices.

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