ref: ad6150f7697ce486630c75cb53fa607928ced4c7
parent: 1753f0d20877abef265eef81fcad49a058fc0b5f
author: Paul Wilkins <paulwilkins@google.com>
date: Mon Nov 22 08:17:35 EST 2010
Recalibration of bits per MB tables The baseline bits per MB prediction tables have been re calibrated based on the assumption that bits per mb is inversely proportional to the quantizer level. Change-Id: Ibd355c7acac4b8053dda1baf1032fe35f11da7f7
--- a/vp8/encoder/ratectrl.c
+++ b/vp8/encoder/ratectrl.c
@@ -45,46 +45,48 @@
// Bits Per MB at different Q (Multiplied by 512)
#define BPER_MB_NORMBITS 9
+// Work in progress recalibration of baseline rate tables based on
+// the assumption that bits per mb is inversely proportional to the
+// quantizer value.
const int vp8_bits_per_mb[2][QINDEX_RANGE] =
{- // (Updated 19 March 08) Baseline estimate of INTRA-frame Bits Per MB at each Q:
+ // Intra case 450000/Qintra
{- 674781, 606845, 553905, 524293, 500428, 452540, 435379, 414719,
- 390970, 371082, 359416, 341807, 336957, 317263, 303724, 298402,
- 285688, 275237, 268455, 262560, 256038, 248734, 241087, 237615,
- 229247, 225211, 219112, 213920, 211559, 202714, 198482, 193401,
- 187866, 183453, 179212, 175965, 171852, 167235, 163972, 160560,
- 156032, 154349, 151390, 148725, 145708, 142311, 139981, 137700,
- 134084, 131863, 129746, 128498, 126077, 123461, 121290, 117782,
- 114883, 112332, 108410, 105685, 103434, 101192, 98587, 95959,
- 94059, 92017, 89970, 87936, 86142, 84801, 82736, 81106,
- 79668, 78135, 76641, 75103, 73943, 72693, 71401, 70098,
- 69165, 67901, 67170, 65987, 64923, 63534, 62378, 61302,
- 59921, 58941, 57844, 56782, 55960, 54973, 54257, 53454,
- 52230, 50938, 49962, 49190, 48288, 47270, 46738, 46037,
- 45020, 44027, 43216, 42287, 41594, 40702, 40081, 39414,
- 38282, 37627, 36987, 36375, 35808, 35236, 34710, 34162,
- 33659, 33327, 32751, 32384, 31936, 31461, 30982, 30582,
+ 1125000,900000, 750000, 642857, 562500, 500000, 450000, 450000,
+ 409090, 375000, 346153, 321428, 300000, 281250, 264705, 264705,
+ 250000, 236842, 225000, 225000, 214285, 214285, 204545, 204545,
+ 195652, 195652, 187500, 180000, 180000, 173076, 166666, 160714,
+ 155172, 150000, 145161, 140625, 136363, 132352, 128571, 125000,
+ 121621, 121621, 118421, 115384, 112500, 109756, 107142, 104651,
+ 102272, 100000, 97826, 97826, 95744, 93750, 91836, 90000,
+ 88235, 86538, 84905, 83333, 81818, 80357, 78947, 77586,
+ 76271, 75000, 73770, 72580, 71428, 70312, 69230, 68181,
+ 67164, 66176, 65217, 64285, 63380, 62500, 61643, 60810,
+ 60000, 59210, 59210, 58441, 57692, 56962, 56250, 55555,
+ 54878, 54216, 53571, 52941, 52325, 51724, 51136, 50561,
+ 49450, 48387, 47368, 46875, 45918, 45000, 44554, 44117,
+ 43269, 42452, 41666, 40909, 40178, 39473, 38793, 38135,
+ 36885, 36290, 35714, 35156, 34615, 34090, 33582, 33088,
+ 32608, 32142, 31468, 31034, 30405, 29801, 29220, 28662,
},
-
- // (Updated 19 March 08) Baseline estimate of INTER-frame Bits Per MB at each Q:
+ // Inter case 285000/Qinter
{- 497401, 426316, 372064, 352732, 335763, 283921, 273848, 253321,
- 233181, 217727, 210030, 196685, 194836, 178396, 167753, 164116,
- 154119, 146929, 142254, 138488, 133591, 127741, 123166, 120226,
- 114188, 111756, 107882, 104749, 102522, 96451, 94424, 90905,
- 87286, 84931, 82111, 80534, 77610, 74700, 73037, 70715,
- 68006, 67235, 65374, 64009, 62134, 60180, 59105, 57691,
- 55509, 54512, 53318, 52693, 51194, 49840, 48944, 46980,
- 45668, 44177, 42348, 40994, 39859, 38889, 37717, 36391,
- 35482, 34622, 33795, 32756, 32002, 31492, 30573, 29737,
- 29152, 28514, 27941, 27356, 26859, 26329, 25874, 25364,
- 24957, 24510, 24290, 23689, 23380, 22845, 22481, 22066,
- 21587, 21219, 20880, 20452, 20260, 19926, 19661, 19334,
- 18915, 18391, 18046, 17833, 17441, 17105, 16888, 16729,
- 16383, 16023, 15706, 15442, 15222, 14938, 14673, 14452,
- 14005, 13807, 13611, 13447, 13223, 13102, 12963, 12801,
- 12627, 12534, 12356, 12228, 12056, 11907, 11746, 11643,
+ 712500, 570000, 475000, 407142, 356250, 316666, 285000, 259090,
+ 237500, 219230, 203571, 190000, 178125, 167647, 158333, 150000,
+ 142500, 135714, 129545, 123913, 118750, 114000, 109615, 105555,
+ 101785, 98275, 95000, 91935, 89062, 86363, 83823, 81428,
+ 79166, 77027, 75000, 73076, 71250, 69512, 67857, 66279,
+ 64772, 63333, 61956, 60638, 59375, 58163, 57000, 55882,
+ 54807, 53773, 52777, 51818, 50892, 50000, 49137, 47500,
+ 45967, 44531, 43181, 41911, 40714, 39583, 38513, 37500,
+ 36538, 35625, 34756, 33928, 33139, 32386, 31666, 30978,
+ 30319, 29687, 29081, 28500, 27941, 27403, 26886, 26388,
+ 25909, 25446, 25000, 24568, 23949, 23360, 22800, 22265,
+ 21755, 21268, 20802, 20357, 19930, 19520, 19127, 18750,
+ 18387, 18037, 17701, 17378, 17065, 16764, 16473, 16101,
+ 15745, 15405, 15079, 14766, 14467, 14179, 13902, 13636,
+ 13380, 13133, 12895, 12666, 12445, 12179, 11924, 11632,
+ 11445, 11220, 11003, 10795, 10594, 10401, 10215, 10035,
}
};
--
⑨