HDTV and widescreen

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Archived from groups: alt.satellite,alt.satellite.expressvu,alt.video.satellite.mpeg-dvb,sci.engr.television.advanced (More info?)

yea right <spam@spam.spam> wrote in message news:<pan.2004.09.17.02.53.12.799211@spam.spam>...
> On Thu, 16 Sep 2004 21:50:14 +0200, Jason Sperry wrote:
>
> > Heck even 720p looks better for high
> > speed images because you get a full 720 lines in 1/60th of a second, with
> > 1080i you only get 540 lines in 1/60th of a second.
>
> Nope, you get the top half of a 720P picture in 1/60th of a second.
>
> 720P is only 30 frames per second.
> 1080i is 60 fields per second to make up 30 frames per second.

Get a clue, 720 does not have to be 30 fps. Several US broadcasters
currently broadcast 720p/60 content, that's 60 whole frames per
second. Sport events, where most of the time you have fast motion look
better in 720p@60fps than 1080i.

 

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Archived from groups: alt.satellite,alt.satellite.expressvu,alt.video.satellite.mpeg-dvb,sci.engr.television.advanced (More info?)

In <I47879.KMF@news.boeing.com> "Albert Manfredi" <albert.e.manfredi@nospam.com> writes:

>"Doug Smith W9WI" wrote:

>> I didn't think 1080p was an option for ATSC OTA?
>>
>> (seeing this was crossposted to several satellite groups I suppose
>> 1080p is a valid option there..)

>Sure it is. Check again.

>ATSC allows 1920 X 1080 at 24p, 30p, and 60i (and the 999/1000 lower
>rates). So when you say "1080i," that's shorthand for only the one 60i
>option.

<snip>

>Another reason to retain one interlaced format for HDTV was that in the
>early days, it made it easier for equipment manufacturers to introduce
>HDTV cameras and displays quickly. Sony used this advantage, for
>example.

That's 1080/23.98Psf. I work in film-to-tape post and the vast majority
of HDTV work we do -- spots & shows -- is in this format. I'd say about
10% is 1080i, 5% 720p, and the balance 1080Psf.

>In time, one would think that interlaced transmissions would dwindle and
>eventually cease.

And dealing with umpitty-ump different formats is a real skootch.
We've finally installed a reference router. Who'd thought you'd need
a router for sync?

--
Tim Mullen
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