The Joint Collaborative Team on Video Coding (jct-vc) of itu-t wp3/16 and iso/iec jtc 1/ sc 29/ wg 11 held its tenth meeting during 11-20 July 2012 at the City Conference Centre (ccc), a k. a

JCTVC-J0403 AHG6: Cross-check of JCTVC-J0096 Suppression of blocking artifacts at 32x32 transform boundaries [S. Lu, O. Nakagami (Sony)] [late]
JCTVC-J0181 AHG6: On deblocking filter parameters [S. Lu, O. Nakagami, M. Ikeda, T. Suzuki (Sony)]

This contribution proposes to increase the adaptive capability of deblocking filter by expanding the effective value range of variable β. Proposed solutions aim at expanding the value range for high QP to enable stronger filtering. It is reported that better visual quality can be achieved. The proposed solution does not change the core process of the current deblocking filter and reportedly has no influence on common test conditions.

Proposal 1: Having a steeper increase of beta offset towards higher QP values (such that beta would similarly increase as tc offset does currently) – no change of syntax

Proposal 2: introduce new parameters for adjusting the strength of exponential increase of beta and tc offsets.