HD Resolution
What exactly is the resolution of high definition video, in terms of pixels? On Apple's 23-inch Cinema HD Display's web site, it says that its 1920 x 1200 resolution is "more than enough to support high-definition (HD) content in its native format," but it never states what the exact resolution of HD is.
Comments
1080i
720p
480p/i
P= progressive
I= interlaced
HD is 1080, and that's about all I know about it.
http://www.digitalconnection.com/FAQ/HDTV_6.asp
ahem.
So Apple's Cinema HD display is more than ample. If you were working on a 1080i composite in combustion, you would be working with a canvas that was 1920x1080, but when that gets tossed back out to tape for broadcast, your animation is split into the odd and even fields.
Originally posted by LoCash
Since it is interlaced though, at any given point in time, you only have an effective resolution of about 960x1080.
Er...
That would be 1920x540. The interlacing is done with the horizontal scan lines as expected.
Originally posted by Eugene
Er...
That would be 1920x540. The interlacing is done with the horizontal scan lines as expected.
Crap, thanks, dunno how I botched that one.
62 208 000 per sec (1080i)
55 296 000 per sec (720p)
I don't think a lot of people are happier with 720p, they're just happier with anything above NTSC/PAL. Even digital SD get's raves when shown next to the average analogue signal.
The increased horizontal res of 1080i, and the efficiency of the interlacing just destroy any other broadcast format to date. To really see 1080i right now you need to view a D-VHS source. It looks good, particularly on larger screens.
Blu-ray or whatever will bring it to consumers in a few years.
Originally posted by Matsu
I don't think a lot of people are happier with 720p, they're just happier with anything above NTSC/PAL. Even digital SD get's raves when shown next to the average analogue signal.
Maybe when compared to the average NTSC signal. The difference in quality between PAL and digital SD is pretty slim.
Barto
BUT...
As many HDTV monitor manufacturers have forgone fully native 720p support anyway, the benefits of broadcasting with that standard are moot to most viewers.
When I went out to the NAB for Turner in 1998, it was when broadcast HD kit was first really being widely shown. I remember looking at two sets, one was 1080i and the other 720p. I personally found the 1080i to look better, but there are obvious technical reasons I would much, MUCH rather have a progressive signal.
This cuts up the available bandwidth to the point where macro-blocking becomes a big issue. Because 720p takes up less bandwidth, it's not as noticeable.
It's not the format to blame, but the stations trying to send us quantity over quality...