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1. (WO2018057339) VIDEO COMPRESSION SYSTEM PROVIDING SELECTION OF DEBLOCKING FILTERS PARAMETERS BASED ON BIT-DEPTH OF VIDEO DATA

Pub. No.:    WO/2018/057339    International Application No.:    PCT/US2017/051107
Publication Date: Fri Mar 30 01:59:59 CEST 2018 International Filing Date: Wed Sep 13 01:59:59 CEST 2017
IPC: H04N 19/176
H04N 19/134
H04N 19/117
H04N 19/82
H04N 19/86
Applicants: APPLE INC.
Inventors: GUO, Mei
KIM, Jae Hoon
XIN, Jun
YI, Feng
SU, Yeping
ZHANG, Dazhong
CHUNG, Chris
ZHOU, Xiaosong
WU, Hsi-Jung
Title: VIDEO COMPRESSION SYSTEM PROVIDING SELECTION OF DEBLOCKING FILTERS PARAMETERS BASED ON BIT-DEPTH OF VIDEO DATA
Abstract:
Techniques are disclosed for selecting deblocking filter parameters in a video decoding system. According to these techniques, a boundary strength parameter may be determined based, at least in part, on a bit depth of decoded video data. Activity of a pair of decoded pixel blocks may be classified based, at least in part, on the determined boundary strength parameter, and when a level of activity indicates that deblocking filtering is to be applied to the pair of pixel blocks, pixel block content at a boundary between the pair of pixel blocks may be filtered using filtering parameters derived at least in part based on the bit depth of the decoded video data. The filtering parameters may decrease strength with increasing bit depth of the decoded video data, which improves quality of the decoded video data.