Apparatus for and method of reducing the memory bandwidth...

Details Apparatus for and method of reducing the memory bandwidth... Apparatus for and method of reducing the memory bandwidth...

H - Electricity

04

N

H04N 7/12 (2006.01) G06T 9/00 (2006.01) H04N 7/26 (2006.01) H04N 11/02 (2006.01) H04N 11/04 (2006.01) H04N 5/14 (2006.01)

Patent

CA 2273868

The invention is described in the context of a motion estimator within a video compression system but is applicable to other areas as well. The invention utilizes a plurality of processing elements (14-20) and FIFO arrays (22-28) arranged in a linear array to reduce the memory bandwidth required to process the data within the search window (30-36). Data from the search window is initially loaded into the processing elements and then rotated throughout in order to reduce memory accesses. In addition, the search window is traversed in a particular fashion so as to minimize the number of memory accesses required.

La présente invention concerne notamment un estimateur de mouvement se trouvant dans un système de compression vidéo, mais elle est applicable à d'autres domaines. L'invention fait appel à plusieurs unités de traitement (14-20) et à des réseaux FIFO (22-28) (premier entré premier sorti), disposés dans un réseau linéaire pour réduire la largeur de bande de mémoire nécessaire pour traiter les données contenues dans la fenêtre de recherche (30-36). On charge d'abord les données provenant de la fenêtre de recherche dans les unités de traitement, puis on les fait tourner afin de réduire les accès mémoire. En outre, on fait défiler la fenêtre de recherche d'une manière particulière afin de réduire le nombre d'accès mémoire nécessaires.

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