ref: b04d766800f39ed97361d2ec13b740cbf5bca534
parent: 61c4295af8c56c3dbe3a97a8a80a29099e587c69
author: Yunqing Wang <yunqingwang@google.com>
date: Thu May 29 12:53:23 EDT 2014
Use small transform size in non-rd real-time mode In non-rd real-time mode, choosing smaller transform size in encoding gives better video quality and good speed gain than choosing larger transform size. This patch set tx size search method to ALLOW_8X8, which is better than using 4x4 or other larger sizes. Borg tests on rtc set at speed 6 showed significant gain on quality. PSNR gain: 11.034% and SSIM gain: 15.466%. The speed gain is 5% - 12% for <720p clips, and 2% - 7% for 720p clips. Change-Id: If4dc74ed2df359346b059f47fb73b4a0193ec548