CONTEXT DETERMINATION FOR ENTROPY CODING OF RUN-LENGTH ENCODED TRANSFORM COEFFICIENTS

摘要

Methods and devices for encoding and decoding video using mode-dependent context determination in the case of level-run pair coding of transform coefficients are described. Intra-coding modes may be grouped into classes and each class may be associated with a partitioning of a coefficient group into regions. The region in which a coefficient falls determines, in part, the context selected for encoding bins associated with that coefficient, including a level, if the coefficient is non-zero, and a run if the coefficient correspond to the bin of a binarized run value.

主权项

1. A method of decoding video from a bitstream of encoded video using a video decoder, the video including a picture partitioned into blocks, the method comprising:
for a coefficient group within a transform block,
decoding data identifying an intra-coding mode used in generating the transform block;partitioning the coefficient group into regions based on the intra-coding mode; andentropy decoding a bin for reconstructing the coefficients of the coefficient group, wherein the entropy decoding includes determining a context based upon which region is associated with that bin.