Method and system for generating block mode conversion table...

Details Method and system for generating block mode conversion table... Method and system for generating block mode conversion table...

H - Electricity

04

N

H04N 7/01 (2006.01)

Patent

CA 2746829

A method and system for generation of a block mode conversion table for use in online transcoding of a sequence of input images in a first format to a sequence of output images in a second format are described. The table is based on a sequence of training images and provides an effective mapping between the encoding block modes and respective candidate transcoding block modes used during the online transcoding. The method utilizes the encoding block mode, the motion vectors and the residual information extracted during the decoding of the training image to generate the block mode conversion table. A corresponding system is also provided.

L'invention concerne un procédé et un système de génération d'une table de conversion en mode bloc pour l'utilisation dans le transcodage en ligne d'une séquence d'images d'entrée dans un premier format en une séquence d'images de sortie dans un second format. La table est basée sur une séquence d'images d'apprentissage et permet un mappage efficace entre les modes de codage en bloc et les modes de transcodage en bloc candidats respectifs utilisés lors du transcodage en ligne. Le procédé utilise le mode de codage en bloc, les vecteurs de mouvement et les informations résiduelles extraites au cours du décodage de l'image d'apprentissage pour générer la table de conversion en mode bloc. L'invention concerne également un système correspondant.

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