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; 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.