New video and tv oddities

Discussion in 'Windows Media Center' started by Dana Cline - MVP, Nov 8, 2004.

  1. I've got a new nVidia 5200 board and a new hdtv with various inputs. Some
    work, some don't...any advice is appreciated.

    What works... TV with the tuner looks great. DVD (progressive scan) using
    the component video looks great. Media Center TV using composite looks

    What doesn't work... sVideo has a poor picture and is in monochrome. Nothing
    I could do seemed to change that. DVI is way too jittery - I get a picture
    but it bounces up and down and is unwatchable.

    The sVideo output from the nVidia board sort of works - I have an adapter
    for sVideo that extracts? the composite video signal - when I send the
    composite into the TV I get a great picture, but running sVideo straight in
    gives me the monochrome and not as good a picture.

    The TV claims to be 1080i/480p. Nothing I could do in nVidia's software
    would give me a stable DVI picture. I tried various resolutions, including
    640x480 and 1920x1080. nVidia's software has a wealth of options, and I had
    many occurances where I ended up with an unusable picture on the DVI and
    _no_ signal to the monitor because I'd tweaked something the wrong way. I
    finally got it to the point where I have good composite to the TV and good
    VGA to the monitor.

    Any suggestions are welcome...

    Note: I didn't do the 2005 upgrade yet as I wanted to make sure the system
    was somewhat stable before upgrading. Maybe next weekend...

    Dana Cline - MVP
    Dana Cline - MVP, Nov 8, 2004
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  2. Dana Cline - MVP

    JW Guest

    One of the 4 lines specifically carries the color part of the signal and is
    combined with another line when converted to composite. If your adapter is
    on the computer end of the cable then the problem is either with the cable
    or with the TV's S-Video input. If the adapter is on the TV end of the
    cable then the problem is with the TV.

    NVIDIA released new drivers at the very end of October they had additional
    enhancements for HDTV and should allow you to select 480p or 1080i easier.
    The frequency of the signal is important 480p and 720p are at 60hz and 1080i
    is at 30Hz.
    JW, Nov 8, 2004
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  3. Replies inline below...

    The adapter is a cable about 4 inches long and attaches to the sVideo on the
    computer. I think it originally came with my Dell Inspiron 3800 laptop (4
    years ago) since the Dell has sVideo out. The TV has several sVideo inputs
    and I tried them all. The sVideo cable came with my new nVidia 5200 board. I
    may have another sVideo cable somewhere - I'll give it a look tonight.
    I'm running those exact drivers. I did _not_ try 852x480 but will attempt it
    tonight. I think when I did try the 1920x1080 it was at 60Hz, so I'll also
    try the 30Hz tonight.


    Dana Cline - MVP
    Dana Cline - MVP, Nov 8, 2004
  4. Dana Cline - MVP

    JW Guest

    Well at least the S-video color signal from your NVIDIA card is fine since
    composite works with the adapter. Another possible S-Video resolution option
    is 720x480 since that is the format DVDs are normally recorded in and is
    what MCE encodes at.

    I have not tried configuring a DVI connection with the New NVIDIA software
    but I was under the impression(but may be totally wrong,) that you could
    select 480P or 1080i directly as long as the DVI cable was connected to the
    TV and powered up when you try and configure the port since it try to sense
    what the DVI port is connected to.
    JW, Nov 8, 2004
  5. It was connected, TV was powered up and that port selected. I didn't see
    anything in the nVidia software that explicitly mentioned 480p or 1080i -
    only the resolution of 1920x1080. Since the monitor doesn't support that
    resolution, once selected I had to wait for it to revert before I could do
    anything else. It appears that in Clone mode, both monitor and tv/dvi must
    have the same resolution. I can have different resolutions on each if I
    place them side by side but that didn't work so well either.

    Dana Cline - MVP
    Dana Cline - MVP, Nov 8, 2004
  6. Dana Cline - MVP

    JW Guest

    I can see where clone mode can be a problem since VGA does not support
    interlaced video.
    You might try disconnecting the VGA cable and using only the DVI connection
    to your TV.
    JW, Nov 8, 2004
  7. The Svideo problem may be based on the video driver setting. When the
    video card is set to "Composite" and you are using an "SVideo"
    connection, you will see a B&W picture. When the video card is set to
    "SVideo" and you are using "composite", you will see a B&W picture.

    Note that the adapter might not be the issue, if the video card is
    shooting color information down the luminance channel then the adapter
    is probably just passing it along (and the TV looks for that information
    on the composite input).

    Peter Near [MCE MVP], Nov 9, 2004
  8. I haven't seen a way to change the nVidia settings from composite to sVideo,
    or reverse. Looks like I can set up any combination of two - analog,
    digital, tv. The analog is VGA, the digital is DVI, and the tv is the sVideo
    output. I should have a chance tonight to play with it more. First, I gotta
    document how it is now in case I screw it up badly and have to fix it <g>.

    Dana Cline - MVP
    Dana Cline - MVP, Nov 9, 2004
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