[mythtv-users] Re: HDTV ringbuffer possibly causes missed 13 minutes of West Wing?

[Brad Templeton]

On Fri, Mar 11, 2005 at 10:34:39AM -0500, Morgan Rinehart wrote:
> Seems this could have been a Nationwide problem all over the net there 
> are complaints from sound issues to what someone called double letterbox 
> in the last 10min.  Thanks everyone for you help.

"Double letterbox" (actually letterbox inside pillarbox) appears to be caused
by the station setting the program to be SDTV.   Most stations appear to
always run at their official resolution (1080i in this case) and when they
show an SDTV program, they upsample it to 1080i and pillarbox it. 

Widescreen programs put into SDTV are letterboxed.  So they are taking the
HD signal, downconverting it to SDTV letterbox to air on the SDTV channel, and
then upconverting to 1080i and pillarboxing.   Silly.