The following is the table of allowed formats from
www.atsc.org document A54:
Code:
Table 5.1 Compression Formats
Vertical Aspect
lines Pixels ratio Picture rate
1080 1920 16:9 60I, 30P, 24P
720 1280 16:9 60P, 30P, 24P
480 704 16:9,4:3 60P, 60I, 30P, 24P
480 640 4:3 60P, 60I, 30P, 24P
They have 1080p but left out 1080p @ 60 fps because it was too demanding.
- Tom