Image encoder and image decoder

Details Image encoder and image decoder Image encoder and image decoder

H - Electricity

04

N

H04N 7/32 (2006.01) H03M 7/30 (2006.01) H04N 7/30 (2006.01)

Patent

CA 2742239

An image encoder includes a preprocessing unit 1 for dividing an image signal into two-dimensional blocks of a prescribed size, and for deciding, for each of the blocks divided, the type of a region to which the block belongs, and generates compressed data by executing, for each block divided by the preprocessing unit 1, coding processing corresponding to the type of the region decided by the preprocessing unit 1. This makes it possible to execute coding processing suitable for each region in a picture, thereby being able to implement an image encoder capable of improving coding efficiency.

L'invention concerne un dispositif de codage d'image comprenant une unité de prétraitement (1) qui divise un signal d'image en des blocs bidimensionnels d'une dimension prédéterminée et identifie le type d'une région à laquelle chacun des blocs appartient. Le dispositif de codage d'image exécute un processus de codage correspondant au type de la région identifiée par l'unité de prétraitement (1) pour chacun des blocs divisés par l'unité de prétraitement (1) de manière à générer des données compressées. Cela permet l'exécution d'un processus de codage approprié pour chacune des régions sur l'écran, qui en retour améliorera l'efficacité de codage.

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