Patent ID: 6567556
Filing Date: 2003-05-20
Classification: G06T

Abstract:
A method of decoding an image coded by compressed data, the image being of a type which requires data of at least one previously decoded image stored in a memory for its decoding, wherein the memory is a random-access synchronous dynamic memory comprising two memory banks organized into pages, the method comprising the steps of:accessing pages of the memory by simultaneously opening two pages in the two memory banks to store respectively in the two open pages, two macroblocks belonging respectively to two consecutive rows of macroblocks and to a same column of macroblocks of the previously decoded image; extracting a predictor macroblock of a size greater than or equal to the size of the macroblocks of the previously decoded image from the memory, the extracting comprising accessing pages of the memory to simultaneously open with each page access, the two pages in the two memory banks and respectively containing the two macroblocks belonging respectively to two consecutive rows of macroblocks and to the same column of macroblocks of the stored previously decoded image; reading some of the pixels of the two macroblocks accessed during the page accessing, by column, to obtain some of the corresponding pixels of the predictor macroblock; and decoding each macroblock of the image.