[opendtv] Re: Rising to the occasion ...

  • From: Tom Barry <trbarry@xxxxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Thu, 08 Nov 2007 18:59:01 -0500

John Shutt wrote:
There probably aren't any. But the situation is confused by the zillion sports bars that are still displaying it that way, with short fat stubby football players stretched to wide screen.

- Tom

----- Original Message ----- From: "John Willkie" <johnwillkie@xxxxxxxxxxxxx>

Here's what struck me in a post from John today:

"Therefore, all SD programming is 4:3 exclusively."

Pitty that all of what I wrote didn't strike you, John. To refresh your memory I also wrote:

"Therefore, even though anamorphic 16:9 is an ATSC SD format, it is
rarely if ever used, and will continue to remain so even as more 16:9 sets
are sold."


"In the US, 16:9 will forever remain the exclusive domain of HD."

Which again, native 16:9 video formats are exclusively the domain of HD. Emphasis on the "native," John, and your plethera of screen captures today reinforced my point to the nth degree. Every single stream was a 4:3 stream, not a single one was a 704x480i 16:9 aspect ratio stream.

704X480I is not an HDTV format,

I agree. 704x480i is not an HDTV format. Never once did I even come close to asserting that it was.

Nor is it being used as a native widescreen format. It is being used as a 4x3 format, with letterboxing of the material as appropriate.

and I'm not aware of any ATSC or
ATSC-referenced specification that promulgates the use of the term "Enhanced
Definition" or ED.

Not all common industry terms are codified in ATSC specifications. However a simple Google search on EDTV will alay your fears by showing that it is indeed a CEA term.

I believe I have accurately quoted John Shutt, and unless provided with a
reference to an ATSC or ATSC-cited MPEG specification to the contrary, I see
HDTV, SDTV, and things that are less than SDTV.

You did not even come close to accurately quoting me, John. But you were spot on in proving my point with your posted sample of transport streams.

I believe the statement directly above is incontrovertible.

I cannot refute what you perceive, John.

So, all I need to disprove both of these is to show actual stream captures
that are 1) displayed in 16:9 and 2) use a format that doesn't qualify as

Actually, all you need to show are broadcasters who currently present programming in 704x480i30 in native 16:9, not letterboxed 16:9 within a 4:3 frame.

And since I did not say there wouldn't be the odd exception, you should be able to demonstrate several such broadcasters. You did a fine job with demonstrating the opposite today with your very comprehensive list of 4:3 SD streams.

How's this? http://www.etherguidesystems.com/demos/default.aspx

Your server is currently not responding.  I'll try back later.

And, I have previously conceded you were right about something - in my
subject area, John.  I try to deal in facts, and I only try to attain
perfection, I never have claimed to have achieved it.

In that case, John, you made an assertion that I refuted. In this case, you have utterly mischaracterized my position then proceeded to show where I was "wrong," and ironically you proved my assertion while trying to do so.

I never mind being corrected by you, John, when it's warranted. You've done so many times in the past. So have others. That is how I learn.

However, in this case you cannot refute my assertion that there are few if any broadcasters in the United States who are using 704x480i29.97 in a native 16:9 video format. Most, if not all, broadcasters, my own station included, are instead broadcasting 7-4x480i29.97 in a native 4:3 format, with widescreen material letterboxed as appropriate.

Pending examination of your link to Etherguidesystems, you have not shown one single broadcaster using 704x480i29.97 (because you wish to be soooo precise) in a 16:9 aspect ratio. Therefore my assertion stands.

Perhaps I threw you off when I said "720p" as a shorthand for the 1280x720p59.94 format that got you off on some weird "720x480" tangent. Perhaps you saw the "720" and assumed I meant 720x480, not realizing that 720p is a common shorthand for 1280x720p59.94. I don't know, as your though processes are privy only to yourself. However, I never uttered 720x480, you did.



P.S., your server woke up, and what awaited me was two TS reader screen captures. The first is meaningless to our discussion, but the second has the video format information for transport stream pid 161 highlighted.

As Gomer Pyle would say: Surprise, surprise, surprise! Framerate 29.97 Aspect Ratio 4:3.

Another one to reinforce my point, John. Thank you for yet another confirmation that I was correct in my original assertion.

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Tom Barry                  trbarry@xxxxxxxxxxx  

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