ref: d8f5d1b257765317a1da0bb60f1a25a101803a47
parent: 6247b239bca25cadb5fb16b1bc6f4c77e764c4ff
author: Paul Wilkins <paulwilkins@google.com>
date: Fri Dec 14 12:49:46 EST 2012
Problem of over smoothing with intra modes. In some cases intra modes in inter frames give an over smoothed appearance. Especially with noisy but flat content. Also in some cases there were problems with key frame sizing again with very flat but noisy content. These are temporary changes to help alleviate the visual problems but will almost certainly hurt metric results especially at the very low data rate end. Change-Id: I11549179a19277ffc283d9788bc70168f2a8bdc9
--- a/vp9/encoder/vp9_firstpass.c
+++ b/vp9/encoder/vp9_firstpass.c
@@ -41,9 +41,10 @@
#define RMAX 128.0
#define GF_RMAX 96.0
#define ERR_DIVISOR 150.0
+#define MIN_DECAY_FACTOR 0.1
-#define KF_MB_INTRA_MIN 300
-#define GF_MB_INTRA_MIN 200
+#define KF_MB_INTRA_MIN 150
+#define GF_MB_INTRA_MIN 100
#define DOUBLE_DIVIDE_CHECK(X) ((X)<0?(X)-.000001:(X)+.000001)
@@ -1405,10 +1406,9 @@
// Cumulative effect of prediction quality decay
if (!flash_detected) {decay_accumulator =
- decay_accumulator *
- get_prediction_decay_rate(cpi, &this_frame);
- decay_accumulator =
- decay_accumulator < 0.1 ? 0.1 : decay_accumulator;
+ decay_accumulator * get_prediction_decay_rate(cpi, &this_frame);
+ decay_accumulator = decay_accumulator < MIN_DECAY_FACTOR
+ ? MIN_DECAY_FACTOR : decay_accumulator;
}
boost_score += (decay_accumulator *
@@ -1443,10 +1443,9 @@
// Cumulative effect of prediction quality decay
if (!flash_detected) {decay_accumulator =
- decay_accumulator *
- get_prediction_decay_rate(cpi, &this_frame);
- decay_accumulator =
- decay_accumulator < 0.1 ? 0.1 : decay_accumulator;
+ decay_accumulator * get_prediction_decay_rate(cpi, &this_frame);
+ decay_accumulator = decay_accumulator < MIN_DECAY_FACTOR
+ ? MIN_DECAY_FACTOR : decay_accumulator;
}
boost_score += (decay_accumulator *
@@ -1632,7 +1631,7 @@
((mv_ratio_accumulator > 100.0) ||
(abs_mv_in_out_accumulator > 3.0) ||
(mv_in_out_accumulator < -2.0) ||
- ((boost_score - old_boost_score) < 12.5))
+ ((boost_score - old_boost_score) < IIFACTOR))
)) {boost_score = old_boost_score;
break;
@@ -2393,7 +2392,8 @@
if (!detect_flash(cpi, 0)) {loop_decay_rate = get_prediction_decay_rate(cpi, &next_frame);
decay_accumulator = decay_accumulator * loop_decay_rate;
- decay_accumulator = decay_accumulator < 0.1 ? 0.1 : decay_accumulator;
+ decay_accumulator = decay_accumulator < MIN_DECAY_FACTOR
+ ? MIN_DECAY_FACTOR : decay_accumulator;
}
boost_score += (decay_accumulator * r);
@@ -2433,14 +2433,11 @@
int allocation_chunks;
int alt_kf_bits;
- if (kf_boost < 300) {- kf_boost += (cpi->twopass.frames_to_key * 3);
- if (kf_boost > 300)
- kf_boost = 300;
- }
+ if (kf_boost < (cpi->twopass.frames_to_key * 5))
+ kf_boost = (cpi->twopass.frames_to_key * 5);
- if (kf_boost < 250) // Min KF boost
- kf_boost = 250;
+ if (kf_boost < 300) // Min KF boost
+ kf_boost = 300;
// Make a note of baseline boost and the zero motion
// accumulator value for use elsewhere.
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -1312,7 +1312,6 @@
this_rd = RDCOST(x->rdmult, x->rddiv, rate, distortion);
-
if (this_rd < best_rd) {mode_selected = mode;
txfm_size = mbmi->txfm_size;
@@ -1546,6 +1545,7 @@
mic->bmi[ib].as_mode.second = best_second_mode;
#endif
}
+
*Rate = cost;
*rate_y = tot_rate_y;
*Distortion = distortion;
@@ -3385,6 +3385,9 @@
unsigned int ref_costs[MAX_REF_FRAMES];
int_mv seg_mvs[NB_PARTITIONINGS][16 /* n_blocks */][MAX_REF_FRAMES - 1];
+ int intra_cost_penalty = 20 * vp9_dc_quant(cpi->common.base_qindex,
+ cpi->common.y1dc_delta_q);
+
vpx_memset(mode8x8, 0, sizeof(mode8x8));
vpx_memset(&frame_mv, 0, sizeof(frame_mv));
vpx_memset(&best_mbmode, 0, sizeof(best_mbmode));
@@ -3580,10 +3583,8 @@
if (!mbmi->ref_frame) { switch (this_mode) {default:
- case DC_PRED:
case V_PRED:
case H_PRED:
- case TM_PRED:
case D45_PRED:
case D135_PRED:
case D117_PRED:
@@ -3590,6 +3591,9 @@
case D153_PRED:
case D27_PRED:
case D63_PRED:
+ rate2 += intra_cost_penalty;
+ case DC_PRED:
+ case TM_PRED:
mbmi->ref_frame = INTRA_FRAME;
// FIXME compound intra prediction
vp9_build_intra_predictors_mby(&x->e_mbd);
@@ -3623,6 +3627,7 @@
#endif
0);
rate2 += rate;
+ rate2 += intra_cost_penalty;
distortion2 += distortion;
if (tmp_rd < best_yrd) {@@ -3715,6 +3720,7 @@
}
rate2 += rate;
+ rate2 += intra_cost_penalty;
distortion2 += distortion;
/* TODO: uv rate maybe over-estimated here since there is UV intra
--
⑨