DECODING OF INTRA-PREDICTED IMAGES

摘要

In a computer with a graphics processing unit as a coprocessor of a central processing unit, the graphics processing unit is programmed to perform waves of parallel operations to decode intra-prediction blocks of an image encoded in a certain video coding format. To decode the intra-prediction blocks of an image using the graphics processing unit, the intra-predicted blocks and their reference blocks are identified. The computer identifies whether pixel data from the reference blocks for these intra-predicted blocks are available. Blocks for which pixel data from reference blocks are available are processed in waves of parallel operations on the graphics processing unit as the pixel data becomes available. The process repeats until all intra-predicted blocks are processed. The identification of blocks to process in each wave can be determined by the graphics processing unit or the central processing unit.

主权项

1. A computer comprising a processing system, the processing system comprising:
a coprocessing unit; and a central processing unit configured to instruct the coprocessing unit to perform intra-prediction operations on an encoded bitstream of image data comprising a plurality of blocks of an image, the blocks of the image including a plurality of intra-predicted blocks, the processing system configured to determine, for each of the intra-predicted blocks remaining to be processed at a beginning of a wave of processing, dependency information indicating whether pixel data from a reference block for the intra-predicted block is available in memory, and the coprocessing unit configured to process the intra-predicted blocks remaining to be processed in the wave of processing according to the dependency information.