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vp9-svc: Re-adjust some aq-mode=3 control parameters.

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Remove an adjustment to two cyclic refresh (aq-mode= 3)
parameters for SVC. The adjustment was to reduce the
delta-qp on second segment, and reduce the motion threshold.
This was done early on in the SVC encoder development,
in the latest codebase removing this adjustment yields
some improvements in metrics.

The avgPSNR/SSIM metrics increase on average by ~1%
(most clip positive gain), for 3 and 2 layer SVC.

Change-Id: I7a4d5114f16b2a1df383dbe6b3fe02940e29e6cc
This commit is contained in:
Marco 2018-01-23 20:03:19 -08:00
parent d1e9635402
commit 7c69136494
1 changed files with 0 additions and 4 deletions
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4
vp9/encoder/vp9_aq_cyclicrefresh.c
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@ -464,10 +464,6 @@ void vp9_cyclic_refresh_update_parameters(VP9_COMP *const cpi) {
cr->rate_ratio_qdelta = VPXMAX(cr->rate_ratio_qdelta, 2.5);
}
}
if (cpi->svc.spatial_layer_id > 0) {
cr->motion_thresh = 4;
cr->rate_boost_fac = 12;
}
if (cpi->oxcf.rc_mode == VPX_VBR) {
// To be adjusted for VBR mode, e.g., based on gf period and boost.
// For now use smaller qp-delta (than CBR), no second boosted seg, and