shithub: libvpx

Download patch

ref: d14777157e6891759ae2bada3787e16604edbda2
parent: 0207f17144f213a52512cfd8287e26946e30d7ad
author: Marco <marpan@google.com>
date: Thu Aug 24 06:36:27 EDT 2017

vp9: Adjust 16x16 splot threshold for variance partition

For speeds < 7, increase threshold that controls the split
of 16x16->8x8 blocks, for resolutions 720p and higher.

Minor change for speed 5 (since it uses reference partition scheme
which only uses variance partition as first step).
For speed 6: ~0.5% increase in avgPSNR/SSIM metrics on ytlvie set.
No change in speed.

Change-Id: I5126580973201538d8ca26a9256b93c4d11d685b

--- a/vp9/encoder/vp9_encodeframe.c

+++ b/vp9/encoder/vp9_encodeframe.c

@@ -555,6 +555,8 @@

 #endif

     thresholds[0] = threshold_base;

     thresholds[2] = threshold_base << cpi->oxcf.speed;

+    if (cm->width >= 1280 && cm->height >= 720 && cpi->oxcf.speed < 7)

+      thresholds[2] = thresholds[2] << 1;

     if (cm->width <= 352 && cm->height <= 288) {

       thresholds[0] = threshold_base >> 3;

       thresholds[1] = threshold_base >> 1;