Originally posted by THX
Can you provide a link to this? High-Profile H.264 definitely supports 4:2:2 but I always just assumed this was going to be the standard since the color resolution on anything HD looks leaps and bounds better than NTSC/DVD.
I don\'t have a link, but I remember seeing WMV-9 HD in the same 4:2:0 sampling that MPEG-2 has for lossy compression. I think that\'s main profile or something like that. As for MPEG-4, I honestly have no idea but I assume its the same too. I didn\'t know high profile is 4:2:2 Y Cb Cr sampling.
Seeing how much more compression efficient MPEG-4 and WMV-9 can be, that I think it could do 4:2:2 Y Cb Cr sampling with ease.
Both Blu Ray and HD-DVD runs at 1x speed of 36 Mbits per sec.
with 4:2:0 sampling and 80:1 compression, that = about 9 Mbits of space per second.
but with 4:2:2 sampling and 80:1 compression, its only equal roughly 12.5 Mbits per second. So, i think i wouldn\'t be surprise if its support 4:2:2 sampling. It will saves a lot of headaches of than using 4:2:0 which is tricky to upsample to 4:2:2 or 4:4:4.
with 1080i/720p, and if it runs at 30 Mbits per second @ 4:2:2 Y Cb Cr, that will have about 33:1 compression ratio.
with 1080p @ 4:2:2 Y Cb Cr running at the same bandwidth of 30 Mbits per second will have about 66:1 compression which is possible based on that MPEG-4 and WMV-9 is 3x more efficient than MPEG-2 or can compress up to 120:1 ratio.
Forgive my mumbo jumpo, but i think its possible to support 4:2:2 on blu ray and hd-dvd...