[opendtv] Re: I think I finally figured out Craig's confusion!
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 7 Aug 2012 07:03:38 -0400
At 4:06 PM -0500 8/6/12, Manfredi, Albert E wrote:
Let's say the STB has to build a frame which incorporates a 4:3
YouTube video window, for example. In order to build that frame
correctly, so that the embedded YouTube video is undistorted, the
STB needs to know what the display looks like. It does not just send
some combination of objects and their metadata across the HDMI
interface and expect the display to do the rest. Ditto if you select
that video window and click to "full screen." Your particular
display has to be filled correctly and undistorted, by the STB. The
frame sent across that HDMI interface depends on how the STB
negotiated with your display. The metadata for both video and audio
depends on the STB "knowing" your display, from the previous
negotiation.
Yes Bert, it is very helpful for the display and the device sending
image streams across the HDMI interface to communicate with one
another so that sending device can optimize the source for the
display. This is the very essence of why these intelligent links have
been created, and the reason that all of this is automatic and
transparent with most PCs connected to flat panel displays.
Unfortunately, many devices that are connected to TV displays do not
take advantage of these capabilities. Instead they rely on DUMB
settings - for example most cable STBs have a setup mode where you
choose either 4:3 or 16:9 output. THAT's IT.
If you buy a display that is not 4:3 or 16:9 you will need to choose
a display mode that is compatible with 4:3 or 16:9 source.
As for the rest, this is the result of the CE industry forcing
everything to the formats they want to support, The formats for which
they build products. It ignores the reality that it is now possible
to create and encode content at virtually any raster size and frame
rate.
It's time to move on.
It's time for the CE industry to start building products that are not
limited to a few subsets of what is now possible in our digital
world. As Cliff noted, you won't find 21:9 source, unless it is force
fit into a 16:9 container. This is simply BRAIN DEAD.
Regards
Craig
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