CONTEXT DERIVATION FOR CONTEXT ADAPTIVE MULTI LEVEL SIGNIFICANCE CODING

摘要

A device for coding video data includes a video coder configured to code first significance information for transform coefficients associated with residual data wherein the first significance information indicates if a first sub block comprises at least one non zero coefficient wherein the first sub block is a sub block of an entire transform block; and code second significance information wherein the second significance information indicates if a second sub block comprises at least one non zero coefficient wherein the second sub block is a sub block of the first sub block wherein coding the second significance information comprises performing an arithmetic coding operation on the second significance information wherein a context for the arithmetic coding operation is determined based on one or more neighboring sub blocks of a same size as the first sub block.