[mythtv-users] DVI or RGB

[Phil Bridges]

On Mon, May 19, 2008 at 4:57 PM, JS Boyd <mythtv at futures.com> wrote:
> Brett Williams wrote:
>> I am using a Vizio VP50 Plasma TV with my MythTV.  I have the option
>> of going DVI to HDMI or out the 15pin monitor cable on the computer to
>> the 15pin RGB plug on the TV.  I have been using the RGB connection
>> and have had great quality on it, but in the back of my head I am
>> thinking I may get a better picture using the DVI/HDMI connection.
>>
>> What would you do?  Is one that much better than the other?
> DVI is best when the screen displays the exact resolution of the
> program. So for 1920x1080 (1080i or p) content recorded digitally you
> will see exactly what was recorded without any scaling. However, the
> VP50 is a 1366 x 768 set, so the TV is going to have scale whatever
> video stream to it. This tends to "soften" all content shown versus sets
> that support native 1080i, 1080p and 720p native resolutions.
>
> I have hooked up a VP50 to use  RGB, but  have not bothered to try DVI.
> RGB looks quite nice.
>
> If you use DVI you should use the video standard 1080i, 720p, and 480p
> signals. (In fact, the TV may complain if you use anything else.)  This
> will force the TV to use its internal scaler. If you use  RGB  you can
> treat the TV as a 1366x768 display and use Myth and your video card to
> do the scaling.
>

You most certainly *can* use the video card to scale your output over DVI/HDMI.