INTRA-BLOCK COPYING ENHANCEMENTS FOR HEVC IN-RANGE-EXTENSION (REXT)

摘要

High efficiency video coding (HEVC) enhancements are described for intra-block copying for reducing motion vector (MV) coding redundancy and enhancing in range extensions (RExt) by selecting a default block my predictor. In reducing MV data redundancy, the value of MVx and/or MVy can have a baseline at the width (W), or height (H) of the respective block, whereby fewer bits need to be encoded. One embodiment for enhancing RExt provides an improved selection of a default block vector predictor for the first CU performing intra-block copying in a CTU.

主权项

1. An apparatus for eliminating data redundancy in motion vector coding, comprising:
(a) an entropy encoder configured for performing motion vector (MV) coding; (b) a computer processor of said entropy encoder; and (c) programming in a non-transitory computer readable medium, executable on said computer processor, for performing steps including:
(i) preventing intra-block copying operations of a block whose motion vector overlaps the block itself or includes any non-reconstructed pixels;(ii) wherein said block whose motion vector overlaps the block itself is within a current coding unit (CU) having a height H and width W;(iii) restricting allowable intra-block copying operations of a block from the current coding unit (CU) to a region outside of a pixel area that is twice the height (2H) and twice the width (2W) of the current coding unit; and(iv) eliminating redundancy by not coding the number of bits associated with the height (H) and/or width (W) of the block which is subject to inter-block copying.