Quote:
Originally Posted by Karupted Charles
Isnt true hd 1440 x 1080 thats what our HD movies are being put out as.
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16:9 aspect ratio for HD
720p = 1280 x 720 @ 60 progressive (non interlaced) frames per second
1080i = 1920 x 1080 @ 60 interlaced frames per second
DVD is 720×480 @ 29.97 frames per second
Current TVs use interlaced frames.. Basically you take an image and draw every even line on one pass and then on the next pass you draw the odd lines resulting in 30 different images per second. Note that old TVs use the AC 60Hz and thus that's why they were 60 frames a second.
The reality though is that as far as the frame rate goes, it's really going to depend on the display it's used on.. The one thing that we should be concerned about though is the compression of the videos.. I could make some videos that were 1080p 60fps but compress the hell out of them so they looked like crap.. Only thing I could find was that HD is typically MPEG2 and maybe at a bit rate of 28-Mbit/s. It appears that MPEG2 broadcast quality maximum is 19.4 Mbps and for cable it's a maximum of 38.8 Mbps. Elsewhere I found HDTV regfered to as 32 Mbit/s video.