Patent ID: 8577168

Claim:
A method for deblocking a reconstructed/decoded picture in a scalable video encoding/decoding system in which deblocking is accomplished by applying a filter to smooth pixel values adjacent to a boundary of a block Block C shared with another block Block X , wherein the number of pixels that are filtered and the type of filtering depend at least on quantization parameter (QP) values QP X and QP C assigned to blocks Block C and Block X , respectively, the method comprising: (1a) if neither Block X nor Block C has any non-zero coefficient, and if Block X and Block C do not have motion vectors that are different by more than a half pixel, then (2) if a residue of Block X is predicted only from one or more corresponding base layer (BL) blocks then setting QP X equal to a weighted average of a QP derived from the one or more corresponding BL blocks and the QP of Block X , otherwise setting QP X equal to the QP of Block X , and (3) if a residue of Block C is predicted only from one or more corresponding BL blocks then setting QP C equal to a weighted average of a QP derived from the said one or more corresponding BL blocks and the QP of Block C , otherwise setting QP C equal to the QP of Block C , (1b) otherwise, setting QP X equal to the QP of Block X and setting QP C equal to the QP of Block C .