ref: 7991241a50f9cf271dcb1063b9fbee0f025eb263
parent: 7ed1d54ab4b75037e90c46135cfe01b7dc47fa4d
author: jackychen <jackychen@google.com>
date: Fri Jun 24 05:39:27 EDT 2016
vp9: Change the scheme for modeling rd for bsize 32x32. For real-time CBR mode, use model_rd_for_sb_y_large instead of model_rd_for_sb_y for 32x32 block. In the former model, transform might be skipped more aggressively in some condtions, which speeds up encoding time with only a little PSNR/SSIM drop on rtc test set. No obvious visual quality regression. PSNR effect on different speed settings: speed 8 rtc: 0.129% overall PSNR drop, 0.137% SSIM drop speed 7 rtc: 0.135% overall PSNR drop, 0.062% SSIM drop speed 5 rtc_derf: 0.105% overall PSNR drop, 0.095% SSIM drop Speed up: gips_motion_WHD, 1mbps: 3.29% faster on speed 7, 2.56% faster on speed8 gips_stat_WHD, 1mbps: 2.17% faster on speed 7, 1.62% faster on speed8 BUG=webm:1250 Change-Id: I818babce5b8549b4b1a7c3978df8591bffde7173