commit 696ee004a5d9608c55d789a9c83e45f586cce440
author Jingning Han <jingning@google.com> Tue Nov 03 08:56:47 2015 -0800
committer Jingning Han <jingning@google.com> Tue Nov 03 09:03:53 2015 -0800
tree f5ad856f355059a97aa4cf0e6fcfc459fb8c4321
parent 4b594d3d0053ef90fce59bbea44077cdcf944f9f

Re-work rate-distortion optimization scheme for transform coding

This commit re-works the rate-distortion optimization scheme for
transform coding. It improves the overall compression performance.
For derf set, the ext-tx experiment provides 2.27% coding gains,
and the new scheme that integrates multiple transform type selection
and recursive transform block partitioning provides a total of 3.24%
coding gains.

Change-Id: Ia1887c4c44b73dfb915d091d96660a99f09d5cc3