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Living Room
Authored by: florp on Jan 26, '05 08:48:50AM
S-Video basically is component video (right audio, left audio, yellow video), at least in Australian PAL-land. S-Video is all 2*3=6 wires in one cable, rather than three. Because of this, it's supposedly slightly better quality.

Unfortunately, every single fact here is false (except maybe that Australia uses PAL).

  • S-Video is a composite signal that has b/w (luminance, sync, blanking) on one pair and the color carrier on another pair (core).
  • This makes it better than traditional composite, in that there is no aliasing between the color carrier and the b/w signal. This allows better color bandwidth and less interference between color and fine structures in the b/w (which, in turn, allows better b/w bandwidth).
  • It is significantly worse than RGB or component (YPbPr), as the color information is still being crammed into the color carrier.
  • There is no audio involved. This is on a separate cable (set of cables).
  • Hence, S-Video is 2-core (two coax lines, one for b/w and one for the color carrier).
  • If you combine the two signals (by shorting them together, in a severe pinch, or preferable capacitor-coupling the color carrier), you get back the traditional composite signal ("yellow video", which is *not* component video).

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