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vp9: Adjust 16x16 splot threshold for variance partition

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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
This commit is contained in:
Marco
2017-08-24 10:36:27 -07:00
parent 0207f17144
commit d14777157e
1 changed files with 2 additions and 0 deletions
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2
vp9/encoder/vp9_encodeframe.c
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@@ -555,6 +555,8 @@ static void set_vbp_thresholds(VP9_COMP *cpi, int64_t thresholds[], int q,
#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;