BLOCK FLIPPING AND SKIP MODE IN INTRA BLOCK COPY PREDICTION

摘要

Innovations in the area of encoding or decoding of blocks using intra block copy (“BC”) prediction improve coding efficiency for intra-BC-predicted blocks in many situations. For example, some of the innovations relate to block flipping in which an intra-BC-predicted block is flipped relative to a reference region, which can be indicated by a block vector (“BV”) value. Other innovations relate to signaling of a skip mode in which a current intra-BC-predicted block uses a signaled BV differential but lacks residual data.

主权项

1. A computing device comprising:
one or more buffers configured to store a picture; and a video encoder or image encoder configured to perform operations comprising:
determining an intra block copy (“BC”) prediction region for a current block in the picture based on a reference region in the picture, wherein the intra BC prediction region is flipped relative to the reference region;encoding the current block using the intra BC prediction region; andoutputting encoded data in a bitstream, the encoded data including an indication whether the intra BC prediction region is flipped relative to the reference region.