Poutnik
15th March 2005, 06:32
Hi,
I have several times searched for something like matrix guide,
but did not find anything like that. Sth like rules of thumb
what matrix subset to choose for particular coding,
or for what use the specific matrix is fine to use.
I would like to read somewhere:
Matrix A is HBrate one, good for 0.3-0.5 bits/pixel for actor scenes
Matrix B is LBrate one, good for 0.1-0.3 bits/pixel for cartoons
It is easy to understand this could be only rough guide to matrix
purpose, but I miss sth like that.
You can see in following table relation between numbers of CDs, bitrate and bitrate/pixel,
so usage of HBR/LBR matrix is not so obvious as expected.....
width height CD num kb/s au ratio fram/s t min kb/s bits/pixel
720 576 3 448 1,25 23,976 90 2803 0,282
720 576 3 448 1,25 23,976 160 1376 0,138
720 576 2 128 1,25 23,976 90 2044 0,206
720 576 3 128 1,25 23,976 160 1704 0,171
640 480 2 128 1,33 23,976 90 2044 0,277
640 368 1 128 1,74 23,976 90 956 0,169
640 272 3 448 2,35 23,976 160 1376 0,330
640 272 2 448 2,35 23,976 160 765 0,183
640 272 3 128 2,35 23,976 160 1704 0,408
640 272 2 128 2,35 23,976 160 1092 0,262
640 272 2 128 2,35 23,976 90 2044 0,490
640 272 1 128 2,35 23,976 90 956 0,229
512 384 2 128 1,33 23,976 90 2044 0,434
512 384 1 128 1,33 23,976 90 956 0,203
512 288 2 128 1,78 23,976 90 2044 0,578
512 288 1 128 1,78 23,976 90 956 0,271
512 224 1 128 2,29 23,976 90 956 0,348
384 288 1 128 1,33 23,976 90 956 0,361
384 288 1 128 1,33 23,976 160 481 0,181
384 288 2 128 1,33 23,976 160 1092 0,412
384 224 1 128 1,71 23,976 90 956 0,464
384 160 1 128 2,40 23,976 90 956 0,649
1,33 1,78 2,35 Audio 448=AC3
PAL HDTV Wide 128=MP3
I have several times searched for something like matrix guide,
but did not find anything like that. Sth like rules of thumb
what matrix subset to choose for particular coding,
or for what use the specific matrix is fine to use.
I would like to read somewhere:
Matrix A is HBrate one, good for 0.3-0.5 bits/pixel for actor scenes
Matrix B is LBrate one, good for 0.1-0.3 bits/pixel for cartoons
It is easy to understand this could be only rough guide to matrix
purpose, but I miss sth like that.
You can see in following table relation between numbers of CDs, bitrate and bitrate/pixel,
so usage of HBR/LBR matrix is not so obvious as expected.....
width height CD num kb/s au ratio fram/s t min kb/s bits/pixel
720 576 3 448 1,25 23,976 90 2803 0,282
720 576 3 448 1,25 23,976 160 1376 0,138
720 576 2 128 1,25 23,976 90 2044 0,206
720 576 3 128 1,25 23,976 160 1704 0,171
640 480 2 128 1,33 23,976 90 2044 0,277
640 368 1 128 1,74 23,976 90 956 0,169
640 272 3 448 2,35 23,976 160 1376 0,330
640 272 2 448 2,35 23,976 160 765 0,183
640 272 3 128 2,35 23,976 160 1704 0,408
640 272 2 128 2,35 23,976 160 1092 0,262
640 272 2 128 2,35 23,976 90 2044 0,490
640 272 1 128 2,35 23,976 90 956 0,229
512 384 2 128 1,33 23,976 90 2044 0,434
512 384 1 128 1,33 23,976 90 956 0,203
512 288 2 128 1,78 23,976 90 2044 0,578
512 288 1 128 1,78 23,976 90 956 0,271
512 224 1 128 2,29 23,976 90 956 0,348
384 288 1 128 1,33 23,976 90 956 0,361
384 288 1 128 1,33 23,976 160 481 0,181
384 288 2 128 1,33 23,976 160 1092 0,412
384 224 1 128 1,71 23,976 90 956 0,464
384 160 1 128 2,40 23,976 90 956 0,649
1,33 1,78 2,35 Audio 448=AC3
PAL HDTV Wide 128=MP3