Method and apparatus for reduction of deblocking filter

摘要

A method and apparatus for deblocking of reconstructed video are disclosed. In one embodiment, the method divides a block boundary into two sub-boundaries and separates lines or column across the sub-boundaries into two groups. The deblocking filter decision for each group is determined based on the lines or columns in the respective group. In another embodiment, the method divides block edges of blocks in the LCUs into two edge groups, where the first edge group corresponds to horizontal block edges between two LCUs and the second edge group corresponds to remaining block edges not included in the first edge group. The number of lines processed by a vertical filter in the first edge group is less than the number of lines processed by a vertical filter in the second edge group. Accordingly, a system embodying the present invention has reduced storage requirement.

主权项

1. A method of deblocking for reconstructed video in a video coding system, the method comprising:
receiving reconstructed pixel data associated with a block boundary between two adjacent N×N blocks, where N is an integer; separating the block boundary into a first sub-boundary and a second sub-boundary for a vertical boundary or horizontal boundary; determining a first pixel group, wherein the first pixel group comprises a first group of line segments across the first sub-boundary of the vertical boundary or a first group of column segments across the first sub-boundary of the horizontal boundary; determining a second pixel group, wherein the second pixel group comprises a second group of line segments across the second sub-boundary of the vertical boundary or a second group of column segments across the second sub-boundary of the horizontal boundary; determining a first filter decision for the first sub-boundary based on the first pixel group, wherein
at least one line segment or column segment of the first pixel group is used to determine the first filter decision comprising whether to turn the filter on or off, andwherein the at least one line segment or column segment of the first pixel group is further used to determine the first filter decision further comprising whether to select a strong filter or a weak filter; determining a second filter decision for the second sub-boundary based on the second pixel group; applying deblocking filter to the first sub-boundary according to the first filter decision; and applying deblocking filter to the second sub-boundary according to the second filter decision.