[opendtv] Re: Why can't POSTAGE STAMPS be Eliminated???
- From: Mark Schubin <tvmark@xxxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 18 May 2006 21:48:04 -0400
There were two papers on this very subject at the NAB convention, one
(by Bill Miller of ABC) called "Canceling the Postage Stamp." They were
about AFD (active format description), bar data, and pan-scan.
TTFN,
Mark
Richard Hollandsworth wrote:
> Why must Letterboxed programs (e.g. Widescreen 720x480 DVDs) be transmitted
> as a 360x480 "Postage Stamp" within the SD 640x480 4:3 box?
> Why can't they be transmitted in either 720x480 (currently in SCTE specs) or
> as "SD-Lite" 704x480 (currently in both SCTE and ATSC specs)?
>
> Surely the Encoding equipment is capable of handling this resolution
> setting.....
>
> An HD-STB/DVR (whether built to ATSC or SCTE specs) should be capable of
> accepting this format without modification, filling up the screen on a 16:9
> HDTV.....and "shrink-to-fit" for Video/S-Video output, just as they already
> do for HD.
>
> Shouldn't a cable SD-STB also be capable of accepting widescreen
> formats---after all it's one of the 480 formats in the SCTE specs???
> If not, wouldn't it be a viable software-only upgrade???
>
> =============================================
> ATSC Candidate Standard CS-TSG-674 proposes revising Table A3 in ATSC A/53
> Annex A to (finally) include the 720x480
> widescreen SD resolution, indicating that it has been in use for several
> years with any reported complaints.
>
> So there may not even be a need to down-rez ATSC to "SD-Lite" 704x480.
>
>
>
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