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  1. I don't understand XGA HDTVs, that is, HDTVs with resolutions of 1024x768. This is clearly a 4:3 aspect ratio, so how can there be numerous widescreen HDTV's at this resolution? I'm assuming the horizontal pixels are just wider than the vertical ones, so basically, it's a 4:3 picture stretched to fit a widescreen?

    But wouldn't this result in a much lower picture quality?

    I'm asking this because there is a standard 1366x768 lcd, and a 1024x768 plasma that are both going on sale at Future Shop on boxing day. The plasm with the lower resolution is 200 dollars cheaper. What's the difference in picture quality between the two?

    Thanks,

    Tony
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  2. Member edDV's Avatar
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    Originally Posted by tonyjones102
    I don't understand XGA HDTVs, that is, HDTVs with resolutions of 1024x768. This is clearly a 4:3 aspect ratio, so how can there be numerous widescreen HDTV's at this resolution? I'm assuming the horizontal pixels are just wider than the vertical ones, so basically, it's a 4:3 picture stretched to fit a widescreen?

    But wouldn't this result in a much lower picture quality?

    I'm asking this because there is a standard 1366x768 lcd, and a 1024x768 plasma that are both going on sale at Future Shop on boxing day. The plasm with the lower resolution is 200 dollars cheaper. What's the difference in picture quality between the two?

    Thanks,

    Tony
    You have it right. If the plasma is 16:9, it has the equivalent of wide pixels or less horizontal display resolution. For 4:3 SD upscale, the picture will be centered in the 16:9 panel with about 768x768 resolution being used. For 16:9 HD sources, 1080i and 720p inputs get scaled and displayed at 1024x768.

    On a square pixel 1366x768 display. Horizontal and vertical resolution are displayed equally. For 4:3 SD upscale, the picture will be centered in the 16:9 panel with about 1024x768 resolution. For 16:9 HD sources, 1080i and 720p inputs get scaled and displayed at 1366x768.
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    Wait, so what your saying ED, is that...

    1024x768 which I can set as default on my Desktop. This is a Magnavox 27" LCD by the way... When I get my HDTV tuner card, full screen at that resolution will be 720p?
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  4. Member edDV's Avatar
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    Originally Posted by dj4monie
    Wait, so what your saying ED, is that...

    1024x768 which I can set as default on my Desktop. This is a Magnavox 27" LCD by the way... When I get my HDTV tuner card, full screen at that resolution will be 720p?

    For tonyjones102's choices, the plasma will show the 1024x768 desktop stretched wide. You would use the display card or software player to resize to 768x768 for a centered 4:3 display.

    The 1366x768 LCD will need the display card set for wide screen desktop at 1366x768. Then a 4:3 SD tuner playback will show as a 4:3 rectangle on the 16:9 desktop.

    If your Magnavox is set for a 1366x768 wide desktop, 720p from a HD tuner will show as a 1280x720 16:9 window on a 1366x768 desktop. "Full Screen" will upscale 1280x720 to 1366x768.
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    Ah....

    I've been trying some WMVHD clips available from MS and it looks fanstatic!

    My desktop is set at 1280x768@60Hz, I played it through WMP10. Now that is what I expect from a HD signal when I get the tuner card.

    What would WMP set the resolution at for playback??
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  6. Member edDV's Avatar
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    welcome to progressive video.

    "Full screen" will match the desktop resolution so 1280x768 with black letterbox.
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    Ed,

    Can I ask you what is the best way then to make divx and xvid etc look normal on my plasma when its native res is 1024x768, and it says mode not supported when i change the desktop to 1360x768?

    thanks

    vis
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  8. Member edDV's Avatar
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    Are you feeding it by VGA? Then try 1024x768. Each pixel will display 4:3 aspect ratio (e.g. wide). The TV manual should list accepted VGA resolutions.

    Or feed it 16:9 1280x720p square pixel. The display will scale that to 1024x768 but it should still be 16:9.
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  9. Member Soopafresh's Avatar
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    I made some 16x9 clips for a projector which was 1024x768, and IIRC the dimensions I encoded to was 1024x576.
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