ref: 2a5278bdbdc908ac994edb4dd2ba71c11eec6364
parent: 6fdd4d26de9bddb2b0acd82bde72b0b3ccfb7c5a
author: Jingning Han <jingning@google.com>
date: Wed Mar 6 07:02:15 EST 2013
Extend diff MV limit from +/-256 to +/-1024 Increase the motion search range by 4x. Change MV_CLASS tree of the entropy coding to allow two additional mv classes to cover the extended motion vector limit. The codec determines the effective motion search range conditioned on the actual frame dimension. It provides coding gains: stdhd 0.39% yt 0.56% hd 0.47% Major coding performance gains are packed in several sequences with intense motion activities, e.g., ped_1080p gains 7% at high bit-rates, and on average 3%. TODO: Need to further tune the rate control and motion search units. Change-Id: Ib842540a6796fbee5a797809433ef6a477c6d78d