S-video

Discussion in 'Archived Threads 2001-2004' started by harvey_mason, Nov 21, 2002.

  1. harvey_mason

    harvey_mason Agent

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    What is the highest resolution that an s-video connection can give you?????

    regards,
    harvey
     
  2. Bob McElfresh

    Bob McElfresh Producer

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    I think it's about 420 lines of resolution.

    But thats not why you should use SVideo.

    Your TV has a circuit called a "Comb Filter". It's job is to convert Composite video into SVideo. This circuit is expensive, precise and not-perfect.

    Your DVD player and Satelite system carry it's video already separated. If you can feed your TV the SVideo signal, it will bypass the Comb filter.

    Home Theater magazine compared all 3 connection types on a 50" TV and came up with these numbers:

    Composite (single RCA wire): baseline
    SVideo (funny 'keyboard' plug): 20% better than Composite
    Component (3 RCA wires): 25% better than Composite

    They noted that the improvement is MORE if the display is larger, and less if the display is smaller. But a 20% jump in picture quality just by using SVideo is a great thing.

    Hope this helps.
     
  3. mike_frontier

    mike_frontier Supporting Actor

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    Wow.

    Your serious that Component (3 RCA wires) 5% better than S-Video?

    Maybe I should try that. I always thought that S-video was better picture/resoulution quality then Component hookup.

    My Receiver has S-video and Component for support of my TV. Thats neat to know. Thanks
     
  4. Ryan Leemhuis

    Ryan Leemhuis Second Unit

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    Yup component is definitely the best. It separates the video signal into 3 signals instead of 2.
     
  5. Allan Jayne

    Allan Jayne Cinematographer

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    There is no theoretical limit to the horizontal resolution of the luminance component of S-video, although the most common source material encountered in S-video (from a DVD player) is 720 Max Pixels Across (540 TV Lines @ 4:3 or 405 TVL @ 16:9).
    The Y part of S-video is normally equal to the Y part of interlaced component video.
    It is conceivable that an HDTV set top box could deliver 1920 MPA via S-video but I know of no examples.
    Component video allows much greater horizontal chrominance resolution (finer, clearer, and more precise transitions from one color to another).
    Chrominance (the C part) horizontal resolution for S-video is spec'ed at about 160 MPA and I believe the theoretical maximum is 185 MPA.
    On a DVD the chrominance resolution is half the luminance, or 360 MPA. I believe that HDTV uses two formats (a) like DVD horizontal and vertical chrominance resolution each half the luminance or every 2x2 block of luminance pixels share the same hue, or (b) horizontal is 1/4 the luminance and vertical equals the luminance where every 4 luminance pixels in a row share the same hue.
    Video hints:
    http://members.aol.com/ajaynejr
     
  6. Vince Maskeeper

    Vince Maskeeper Producer

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    Be sure you realize he said component- not COMPOSITE. Some people get the two confused. Composite is on the lower quality end (single RCA style cable), followed by svideo (multipin connector) then component is highest (set of 3 RCA style cables).

    There is more info on various connection types, including pictures, in the FAQ and PRIMER.

    -vince
     

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