S-Video to Composite Video - AVS Forum
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post #1 of 7 Old 03-08-2011, 03:51 PM - Thread Starter
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A source device exists that can outputs video to S-Video and composite video to a destination device that accepts as input composite video.

I have determined the following cable options to transport video from the source device to the destination device:
  1. S-Video to Composite Video cable (Example)
  2. S-Video cable with S-Video to Composite Video Adapter (Example of adapter)
  3. Composite Video Cable
All else equal, which option should provide the best representation of the source video?
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post #2 of 7 Old 03-09-2011, 10:26 PM
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All the S-video signal is, is separate Chrominance (color information) and Luminance B&W signal+sync. The combining adapter will work fine and give the best possible image dependent on the source and monitor.
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post #3 of 7 Old 03-10-2011, 11:24 AM - Thread Starter
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Quote:
Originally Posted by Gizmologist View Post

All the S-video signal is, is separate Chrominance (color information) and Luminance B&W signal+sync. The combining adapter will work fine and give the best possible image dependent on the source and monitor.

I was aware that S-Video separates Chrominance and Luminance and that using S-Video (purely) tends to result in a better quality image (due to reduction in dot crawl and color bleed).

However, I was not certain whether the composite video's mixed signal artifacting (the dot crawl and color bleeding) was a function of distance. If the mixed signal artifacting is directly related to distance, than using the S-Video to Composite combiner/adapter with an S-Video cable should result in a less defected video than a composite video cable; if the mixed signal artifacting is not directly related to distance, then there should be no benefit from using an S-Video cable with an S-Video to Composite Video combiner/adapter over a composite video cable.

Wherefore, is composite video mixed signal artifacting directly related to distance?
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post #4 of 7 Old 03-10-2011, 11:36 AM
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The term "artifact" is not germaine to NTSC composite video. The cable distance and gauge as well as shielding and surrounding environment can all play a part in degradation of the signal. This can be seen as ghosting, loss of luminance, contrast etc.

As S-video signals on HO equipment are rarely hefty enough to function as a driver for long cable runs, a distribution amp is generally used. What kind of distance and using what cable?
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post #5 of 7 Old 03-10-2011, 04:05 PM - Thread Starter
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Quote:
Originally Posted by Gizmologist View Post

As S-video signals on HO equipment are rarely hefty enough to function as a driver for long cable runs, a distribution amp is generally used. What kind of distance and using what cable?

The expected distance is expected not to exceed six (6) feet.

If using an S-Video cable, I would likely choose:
6FT S-VIDEO CABLE DVD DSS SVHS CABLE SVIDEO M/M (24K Gold Plated)
http://www.monoprice.com/products/pr...seq=1&format=2

If using an Composite Video cable, I would likely choose:
6ft Triple RCA Stereo Video Dubbing Composite Cable (3 x RG59U)
http://www.monoprice.com/products/pr...seq=1&format=2
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post #6 of 7 Old 03-10-2011, 05:21 PM
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You will see no signal degradation at all, either route.
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post #7 of 7 Old 03-10-2011, 05:30 PM - Thread Starter
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OK.

Thank you Gizmologist for your assistance.
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