Thats funny.....I guess 480i widescreen is now HD?
First - the previous HoTat2 post is absolutely correct; we clearly know which channels use MPEG4 compression, but at this time at least, we cannot tell the resolution of the programming payload being carried.
But - the 'A3' channel prefix almost universally indicates an HD channel. Right now I can not think of an exception.
[Edit: 2/28 - With a quick review of the data, there are now many "A3" prefix channels that are in SD. I need to find a clear, and current, definition of the "A3" notation. At one time it did
indicate an MPEG4-D HD channel. (The MPEG4-D being Directv's custom implementation of MPEG4.) But today, I am finding many 'A3' records which are clearly not MPEG4 and clearly not HD.]
And it is not logical to waste bandwidth on D11 to send you a second copy of the same low quality SD signal you already receive from D4S/D9S. I would suggest that the lousy quality MPEG2 video you know have would be an equally lousy quality MPEG4 video. There might be a technical improvement in the MPEG4 picture, but not one that we humans would likely detect.
Forgive me for being optimistic, but this *TEST channel may be sitting here waiting for your FOX/13 to go HD. If you are interested, it might be worth your time to talk with those local station engineers....
Edited by gct, 28 February 2013 - 04:59 PM.