Also, all hdtv currently on the market actually doesn\'t have up to 2 millions pixels as they claim. The hdtv monitors actually have about 1 millions to 1.3 million pixels.
Its has this weird format.
Phillips 34" widescreen hdtv, for instance has this format. (at least Phillips are honest about it)
1200 x 1080i (about 1.3 million pixels). Not even 1920 x 1080i.
But, it still consider hdtv quality because the specification for hdtv have to be at least a million pixels and 1200 x 1080 has over a million. and the specification mention that it has to run at least 24 frames per second progressively. 1200 x 1080i runs at 30 frames per second or 60 fields. That\'s higher than 24p.
RCA 38" widescreen hdtv monitor, runs at 1280 x 1080i.
If you don\'t believe me. Check many companies website that sell tvs, like Sony, Panasonic, Mitsubishi, Sharp, etc....
those companies that made hdtv monitors have a specification of 1080i. it didn\'t say 1920 x 1080i. Just 1080i. And nearly none of them mention 720p as one of the hdtv native format.
So they leave us (consumers) hangs. 1080i could means anything.
it could be 640 x 1080i. But that\'s not over a million pixels so i doubted. It could be 960 x 1080i. That\'s over a million pixels. But stills, not their highest 1080i quality.
So, that\'s why these tv companies haven\'t support 720p format. They try to cut the cost of hdtv and hdtv is still new and aren\'t that popular yet.
Back to the topic. Why is 720p isn\'t support?
Look it this way.
Give RCA 38" widescreen hdtv monitor for example.
it runs at 1280 x 1080 @ 30 hz at it maximum.
if you mulitiply all the numbers together. You will get about 42 megahertz. Just clock it up to 50mhz.
1280 x 720 x 60 hz will give you about 56 megahertz. i will round that up to 60mhz. There is about 10 mhz differences.
that\'s why most 720p format will convert to 1080i format because it requires less bandwidth because of interlace format.
I am hoping I am not confusing you guys here.
