Intra pulse code modulation (IPCM) and lossless coding mode deblocking for video coding

摘要

Techniques for coding video data include coding a plurality of blocks of video data, wherein at least one block of the plurality of blocks of video data is coded using a coding mode that is one of an intra pulse code modulation (IPCM) coding mode and a lossless coding mode. In some examples, the lossless coding mode may use prediction. The techniques further include assigning a non-zero quantization parameter (QP) value for the at least one block coded using the coding mode. The techniques also include performing deblocking filtering on one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value for the at least one block.

主权项

1. A method of coding video data comprising:
coding a plurality of blocks of the video data, wherein at least one block of the plurality of blocks of video data is coded using a lossless coding mode, wherein coding the at least one block using the lossless coding mode comprises:
predicting the at least one block to generate a predicted block for the lossless coding mode; andcoding the at least one block based on the predicted block and an un-quantized residual; predicting a non-zero quantization parameter (QP) value, for the at least one block based at least in part on a QP value for a quantization group that includes the at least one block, wherein the quantization group comprises one or more consecutive blocks in a coding order of the plurality of blocks; assigning the non-zero QP value for the at least one block; determining whether to perform in-loop filtering of each of the plurality of blocks comprising:
determining whether to perform deblocking filtering on one or more of the plurality of blocks of video data, other than the at least one block, based on the assigned non-zero QP value for the at least one block; anddetermining to avoid performing deblocking filtering on the at least one block; and performing in-loop filtering for each of the plurality of blacks based on the respective determinations.