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Rate control adjustment.

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Small adjustment to the active Q range calculations.
These changes should slightly extend the available Q range
for KF/GF/ARF and narrow it for other frames.

The results for this change in isolation are broadly positive
for SSIM and average PSNR and slightly up but mixed for opsnr.

derf +0.293% opsnr, +1.286% SSIM
std-hd + 0.528% opsnr, + 1.746% SSIM
yt +0.056% opsnr, +0.457% SSIM
yt-hd -0.147% opsnr, + 0.226% SSIM

Change-Id: If065280342027ecc5d44b49fc1d440dfef041002
This commit is contained in:
Paul Wilkins 2014-04-22 17:09:47 -07:00 committed by Yaowu Xu
parent c4180f8f9c
commit 38ff3e328f
1 changed files with 4 additions and 4 deletions
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8
vp9/encoder/vp9_ratectrl.c
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@ -81,13 +81,13 @@ void vp9_rc_init_minq_luts() {
for (i = 0; i < QINDEX_RANGE; i++) {
const double maxq = vp9_convert_qindex_to_q(i);
kf_low_motion_minq[i] = get_minq_index(maxq, 0.000001, -0.0004, 0.15);
kf_low_motion_minq[i] = get_minq_index(maxq, 0.000001, -0.0004, 0.125);
kf_high_motion_minq[i] = get_minq_index(maxq, 0.000002, -0.0012, 0.50);
gf_low_motion_minq[i] = get_minq_index(maxq, 0.0000015, -0.0009, 0.32);
gf_low_motion_minq[i] = get_minq_index(maxq, 0.0000015, -0.0009, 0.30);
gf_high_motion_minq[i] = get_minq_index(maxq, 0.0000021, -0.00125, 0.50);
afq_low_motion_minq[i] = get_minq_index(maxq, 0.0000015, -0.0009, 0.33);
afq_low_motion_minq[i] = get_minq_index(maxq, 0.0000015, -0.0009, 0.30);
afq_high_motion_minq[i] = get_minq_index(maxq, 0.0000021, -0.00125, 0.55);
inter_minq[i] = get_minq_index(maxq, 0.00000271, -0.00113, 0.75);
inter_minq[i] = get_minq_index(maxq, 0.00000271, -0.00113, 0.90);
}
}