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Posted by Jukka Aho on 12/07/06 02:03
Joshua Zyber wrote:
> Yes, this does exist for NTSC content, but the aspect ratio flag is
> only transmittable over an HDMI connection. There are a number of
> televisions and external video processors that can read the aspect
> ratio flag and automatically switch to the correct screen mode.
The previous poster claimed that widescreen signaling works on his
American tv set and American DVD player over a component video (YPbPr)
connection (although he did not know which WSS standard was being used
for relaying the aspect ratio information to the tv set and how the
signaling worked on a technical level, exactly.)
I provided a link to one possible explanation in the part of my message
which you snipped off: a specification which defines a VBI-based
widescreen signaling method for 525-line analog systems. Here's that
link again:
<http://www.intersil.com/data/an/an9716.pdf>
I have no way of knowing how widely supported this particular WSS method
is in the US, or if it enjoys any support at all. Perhaps it is the
signaling method that is responsible for the behavior observed by the
previous poster, or perhaps some completely different method is being
used. If someone can shed some more light on this, please do. It would
be interesting to know.
The 625-line version of the same signaling standard (also described in
that document) is supported by all kinds of devices in Europe - ranging
from set-top boxes to video cameras to game consoles - such as the Xbox.
--
znark
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