ref: 3b789d36934161b741a82998685be856e72ac217
parent: 23e8be901811aa39891ff9888dc10ed7c4a084b0
author: Marco <marpan@google.com>
date: Tue Oct 7 12:15:32 EDT 2014
vp8: Suppress denoising with respect to old reference frames. If the GOLDEN or ALTREF frame was last updated > x frames in the past, don't use them for denoising (only consider LAST). Using an old reference frame for denoising, e.g., if it is a long-term reference or the last key frame, can cause some visible artifacts, in particular in the aggressive denoising mode. Change-Id: I239c9fbb092c36cba7e95328f1fa67a58d6a7ed9