1080I / 720P

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Archived from groups: alt.tv.tech.hdtv (More info?)

On Mon, 31 May 2004 15:36:52 -0600, Ron Malvern <rmlvrn@nospam.com>
wrote:

>Interlace isn't evil. It's simply a poor way to construct motion
>pictures. It introduces problems for special effects and editing at the
>post production level, and introduces grossly unneccessary interlace
>artifacts at the display level.

I agree with you 100%. In a perfect world (i.e. in a few years,
hopefully, when it comes to HDTV), everything would be 1080p. Movies
could still be 24p, and TV could be something higher. I'm looking
forward to it.

I really only had a problem with your somewhat-disingenuous claim that
you couldn't get the original progressive source back from an
interlaced product, when in fact for most film material, you can.
That's it! Otherwise I'm wholeheartedly a 1080 progressive fan. (Until
that becomes a reality, I'll have to pick and choose between 720p and
1080i...)

Well, actually I have one more problem: why can't the ATSC use common
terms everywhere, so when I go looking in an actual spec, I see the
same sorts of stuff you see when you search the site itself?? We're
both citing the same source -- the ATSC itself -- yet still can't
agree on terms!

 

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Archived from groups: alt.tv.tech.hdtv (More info?)

In article <77lnb01pmj82aq1caqsjerqe796s3pcp1a@4ax.com>,
karyudo_usenet@yahoo.com.remove.me says...
> Well, actually I have one more problem: why can't the ATSC use common
> terms everywhere, so when I go looking in an actual spec, I see the
> same sorts of stuff you see when you search the site itself?? We're
> both citing the same source -- the ATSC itself -- yet still can't
> agree on terms!
>

I suspect one of the problems dates all the way back to when we first
started dealing with high definition and the various formats presented by
the ATSC. We were dealing with all these different formats for the
first time, and we were dealing with terminology we'd never had to deal
with before. We even had to invent new terminology.
A lot of people were referring to 1080i and 480i as /30i in the early
days. I did myself. But since then the concensus seems to be 60i.
As you point out, the ATSC has to take the lead on this. We can't be
talking past each other with mixed terminology. The ATSC needs a page
on it's website clearly defining which terms refer to what. If it's
there, I haven't found it yet.