Patent ID: 9729879
Date: 2017-08-08
CPC Classifications: H04N

Claim:
1. A method of deblocking of reconstructed video in a video coding system, wherein said deblocking is adaptively applied to block boundaries of the reconstructed video, and each block corresponds to a prediction unit (PU) or a transform unit (TU), the method comprising: receiving pixel data associated with a block boundary between two blocks; determining if the block boundary is a PU-only boundary between two PUs and not between two TUs or if the block boundary is a TU boundary between two TUs; determining if one of the two blocks has non-zero transform coefficients only if the block boundary is the TU boundary, wherein determining if one of the two blocks has non-zero transform coefficients is skipped if the block boundary is the PU-only boundary; assigning a first value to block strength for the block boundary if one of the two blocks has non-zero transform coefficients and the block boundary is the TU boundary; assigning a second value to the block strength for the block boundary if the block boundary is the PU-only boundary, wherein the second value is smaller than or equal to the first value; and applying said deblocking to the block boundary according to the block strength, and wherein filter strength of said deblocking is related to the block strength.