Spatial variant dependency pattern method for GPU based intra prediction in HEVC

摘要

Systems, apparatus and methods are described including operations for graphics processing including spatial variant dependency pattern processing for GPU based intra prediction.

主权项

1. A computer-implemented method for video coding, comprising:
determining, via a dependency module, a variant dependency pattern associated with a plurality of pixel blocks of an active image based at least in part on one or more contexts associated with individual pixel blocks, wherein the determined variant dependency pattern includes a variant set of dependency vectors configured to establish a relationship between a dependent thread and one or more associated threads among a group of computing unit threads associated with the individual pixel blocks; wherein the one or more contexts include a relative location of individual pixel blocks of the active image; wherein the dependency pattern is spatially variant based at least in part on the relative location of individual pixel blocks of the active image; wherein a set of four adjacent pixel blocks of the active image has a maximum of five dependencies for an upper left pixel block, a maximum of four dependencies for an upper right pixel block, a maximum of four dependencies for a lower left pixel block, and a maximum of three dependencies for a lower right pixel block; sequentially dispatching, via a dispatch module, the computing unit threads to individual execution units of a graphics processor based at least in part on the variant dependency pattern; and executing, via the execution units, the dependent thread when the all the associated threads are finished executing.