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 second meeting during 21-28 July, 2010 at the itu-t premises in Geneva, ch

JCTVC-B100 [J. H. Min, S. Lee, I. K. Kim, W. J. Han (Samsung), J. Lainema, K. Ugur (Nokia)] Unification of the directional intra prediction methods in TMuC

This contribution proposes unification of the two directional intra prediction approaches (ADI introduced in JCTVC-A124 and Angular Intra Prediction introduced in JCTVC-A119) which were included in the initial TMuC design in the first JCT-VC meeting. The proposed unified approach provides a single clean design for TMuC intra prediction and is reported to provide an Intra picture coding efficiency improvement of around 1.4% over the default TMuC configuration and around 2.8% improvement over TMuC 0.1.

The proposal was to unify ADI and ANG prediction versions and use that as the future default in TMuC. Report performance by doing this

ADI only (as in 124 or TMuC 0.1) as reference

Switching of ANG and ADI depending on block size roughly 1.4% BR decrease

ANG only roughly 2.9% BR decrease

Unification of ANG and ADI roughly 3.4% BR decrease

(Part of the gain is possibly due to allowing more prediction directions in 4x4 modes)

This was further discussed along with the report given by the TMuC breakout group (see section on TMuC).