Methods and apparatus for implicit block segmentation in video encoding and decoding

摘要

Methods and apparatus are provided for implicit block segmentation in video encoding and decoding. An apparatus includes an encoder for encoding at least a portion of a picture using a block segmentation process performed on a pixel difference of at least two predictors for the portion. The encoder implicitly signals block segmentation information for use by a decoder to decode the portion.

主权项

1. An apparatus, comprising:
an encoder for encoding at least a portion of a picture using a block segmentation process, wherein said encoder includes a segmentation device for performing the block segmentation process on a pixel difference of at least two predictors for the portion, each of the at least two predictors corresponding to a respective one of at least two blocks in at least one reference picture and providing a respective predicted pixel value for each of pixels in the block, wherein said encoder implicitly signals block segmentation information, the at least two predictors, and a weight index for use by a decoder to decode the portion, the block segmentation information indicating which reference picture pixel belongs to which reference picture segment obtained by the block segmentation process, and wherein said weight index indicates weight factors to be used on reference picture segments for calculating a weighted predictor for the portion from a predefined set of weights, and wherein disconnected pixels belonging to a same segment after segmentation are treated as different segments.