Patent ID: 6122315
Filing Date: 2000-09-19
Classification: H04N

Abstract:
A video decoder comprising:a spatial decoder connected to a source of coded video data;a temporal decoder;a video formatter, receiving data from at least one of said temporal decoder and said spatial decoder, wherein said temporal decoder and said spatial decoder define a data source,a data memory for storing the received data,the improvement comprising:a writeback memory, a first raster memory, and a second raster memory, wherein pointers to said data memory are stored in said writeback memory, said first raster memory, and said second raster memory;a memory interface coupled to said data source, said data memory, said writeback memory, said first raster memory, and said second raster memory;a writeback control circuit, for extracting pointers from said writeback memory, wherein said extracted pointers are presented to said memory interface, and said received data is stored in locations of said data memory that are specified by said pointers, said extracted pointers being transferred to a said raster memory; anda raster control circuit, for re-extracting said transferred pointers from a said raster memory for presentation to said memory interface, wherein said stored received data is read from said data memory, and said re-extracted pointers are returned to said writeback memory.