--- In HDTV-in-SFbay@yahoogroups.com
, "quychock27" <quychock@h...>
> Hi all,
> I just subscribed to comcast cable. I getting hd channels, but
> I not sure if I am getting true hd pictures. Currently I have
> a sony 36 inch tv. I have my cablebox set up at 480p so I can
> fit the whole image without getting those annoying back bars on
> top and the bottom. Reading from other websites, they say true
> hd is in 720p or 1080i. So, if I set up my cable box at 480p,
> am I getting true hd pictures?
I have a Sony 36XBR400. It has 2 HD component video inputs that will
accept 480i/480p/1080i. I assume you have a similar TV. The problem
is that any time it receives a 1080i signal it forces the vertical
compression on so that it can display the widescreen image. No zoom
modes or other picture modification are available. When broadcasters
transmit an upconverted SD program, they encode black pillar boxes on
the left and right. So, on this 4:3 TV you end up with a much
smaller image with a black matte on all 4 sides. The image is very
clear, but much smaller than the displayable area.
Here's my setup and my solution. I have a HD reciever (MyHD
recorder) that I usually leave in 1080i output. I pretty much only
use it for HD. I have a DirecTivo that I use for all my SD viewing
which is on a separate input on the TV. That way all the SD on the
Tivo is always full screen and the HD is always widescreen.
I don't have a HD cable box, so I'm not completely sure about this,
but here's my suggestion:
* Connect the Component output from the cable box to the TV and
configure the box to always output 1080i.
* Connect the S-Video output from the cable box to a different input
on the TV
This assumes that the S-Video ouptut is always active - which I
believe is the case with all the Motorola boxes used in the Bay Area.
When you watch a HD program, use the HD input on the TV. When you
watch a SD program, use the S-Video input on the TV. That way it
will always be displayed properly. A hassle, I know, but I think
this is the optimal setup.
The alternative is to change the output on the HD STB to 480p and use
its zoom modes to crop off the pillar boxes put in by the
broadcaster. I can do this on my remote with a couple keystrokes,
but many boxes like Samsung and other OTA recievers have a switch on
the back which really makes this a pain.