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

3.2Draft text specification improvements [the right place for this?]

4Core experiments

4.1CE1: Intra transform mode dependency simplifications

4.1.1Summary

JCTVC-J0021 CE1: Summary report of Core Experiment on intra transform mode dependency simplifications [K. Ugur, A. Saxena (CE coordinators)]

Three non-CE contributions were also noted to be relevant. These are listed in section 5.17.

In this core experiment, two simplifications were tested. Simplification 1 uses 2D DST for all intra prediction modes of 4x4 luma TUs rather than using mixed transform types (4 difference cases). Simplification 2 uses DST for all intra prediction modes of 4x4 luma TUs except that the DC mode is coded with DCT. Both simplifications show coding efficiency loss ranging between 0.0–0.1% on average excluding class F. In class F there was some more loss – between 0.2‒0.8% on average.

Visual testing was planned to be done for simplification 1 only.

It is intended to do visual testing

The results of visual testing were as follows:

• 
  Testing was performed with 14 participants, mainly CE1 participants
  
• 
  Tests indicate that there is no visual difference
  

(A BoG report about the tests will be was provided.).

Decision: Adopt simplification 1

Due to this adoption, there was no need to discuss the remaining documents under CE1