[mythtv-users] OT: Commell LV-667T; Real HDTV? Or just really good SDTV?

[David George]

On 5/10/2005 2:02 PM, Eric Gilbert wrote:

>Maybe I'm not reading this right (or something is buried in
>doublespeak) but it looks like the VT1625 on the Commell LV-667T
>doesn't actually take HDTV resolutions as input.
>  
>
I think that is talking about two different things. The VT1625 does take 
in 640x480, 800x600, and 1024x768 and scale to SDTV resolutions, but it 
also accepts 1280x720p and 1920x1080i modelines and display those 
natively without scaling.

>According to the Via site
>http://www.via.com.tw/en/products/video-display/tv/vt1625/ the chip
>uses their ProScale achieve 720p and 1080i output. "This enables
>scaling of an image from 0.5 to 1.5 factors in the horizontal and
>vertical directions allowing input resolutions from 640x480 – 1024x768
>to outputted up to the latest 1080i or 720p standard HDTV
>resolutions."
>  
>
This is for the composite and svideo output scaler.

>Am I missing something here?
>  
>
I actually have the datasheet for the VT1625 and it shows that 720p and 
1080i are supported going into the chip. I am still working on the 
modeline table for the VT1625, but it goes have actual 720p and 1080i 
support.

I should note that only 640x480, 800x600, and 1024x768 are scaled. And 
they are only scaled to SDTV resolution Nx480i or Nx576i with a 4:3 
aspect ratio out the composite and/or svideo connectors. In order to 
display to a 720p (or 1080i) HDTV set, you will need to use the 
component output and set the output mode to 720p (or 1080i) and do the 
scaling inside of Myth (actually xvideo I guess).

HTH,

-- 
David

HDTV frontend I'm working on (pictures, mythmon source)
  http://mythhd.info