jliechty said:
I so love it when people who have no idea what they're talking about start rambling on and on. What do you mean there's no difference in resolution???? Are you on drugs man??? The max that S-Video can pass is 480 interlaced scanlines compared w/ component inputs that can run 1080 interlaced scan lines.......480----1080...yeah obviuosly no difference there.
As I thought was clear through context, I am talking about standard definition video. If you are passing SDTV through a composite cable hooked up to an SVideo converter, and thence to your set, you will not lose any appreciable amount of resolution (aside from any interference the device might introduce of course). I believe this is what the original poster was talking about. While there is a minor difference in quality between component signalling and SVideo signalling, looking at them side by side it's difficult to impossible to see it. Relative to SVideo-Composite or Composite-RF there is no difference whatsoever. Likewise, on an HDTV signal, the DVI-Composite difference is thoroughly striking relative to the difference between Composite-SVideo on standard resolution.
Again, on SDTV you will have less resolution using an RF signal than an SVideo signal, and slightly less resolution using a composite signal than an SVideo signal. Your set might not show the difference between SVideo and Composite very well, but the difference between SVideo and RF should be readily apparent. Between Composite and SVideo you should have the same number of lines of resolution horizontally and vertically, which is the definition of resolution, no? However, SVideo may introduce some amount of crosstalk between its signals. Composite introduces a significantly higher bit of crosstalk between signals, which, combined with the slight resolution difference, makes the composite-SVideo gap significantly larger than the SVideo-component gap. As I said, cross-talk is primarily a problem for long cable distances. So, for this Component-SVideo box, so long as the box itself is close to the output device (TV), crosstalk should be effectively removed as an issue. Leaving, as I said, SVideo and Component Video at identical quality (and, of course, identical resolutions).
Of course it makes no sense to compare an HDTV signal of any sort to an SDTV signal. Of course the HDTV signal has better resolution. Do I really have to say that? I thought we were all reasonably intelligent here. However, if your device is emitting an SDTV signal, connecting via the component ports instead of the SVideo or composite jacks don't give you HDTV. It gives you SDTV. Through component cables.
So yes, HDTV of various flavors, and progressive scan, can all be put through composite cables as well as SDTV. I tend to doubt that a Composite-SVideo translation box as described would handle any of these variants, so the point is moot (HDTV-SDTV conversion circuitry is relatively expensive; by contrast the electronics to rig together a composite-svideo wire/signal mapping box is really cheap). Would you lose resolution taking an HDTV source into this Component-SVideo converter box and then to the TV? Yes, absolutely; you'd go from your nice clean HDTV signal to a one-pixel-by-one-pixel pure black screen!
As I noted originally, HDTV is a completely different story.
Excuse my remark about not wanting to use component with HDTV. It was obviously insensitive to those who don't have DVI ... my HDTV supports DVI input and, quite frankly, there's no way I'd buy a unit today which doesn't. Fortunately for consumers today, it seems like most of the higher-end HDTV models support DVI now. And, truthfully, component inputs/outputs haven't been out all that long either, at least not at the consumer level; there's not a large body of devices giving component signalling market momentum. If Apple or anybody were to ut out a groundbreaking device supporting HDTV, a lack of a DVI output would absolutely kill the product.
That having been said, yes, I suppose if component signals and/or component inputs are all you've got you would use good old component cables for video. Note, however, that unlike the SVideo vs Component debate, there is a real, appreciable, and frankly dramatic difference between a component signal and a DVI signal. If you are worried about the Component/SVideo translator doing injustice to your component signal, then you damn well would pay the extra bucks to get DVI-based equipment for your HDTV signals.
Sorry about taking so long to respond, and doubly sorry for writing a book in response. Hadn't looked at this thread in a while, but at least three people telling me I don't know what I'm talking about meant I had to either admit I'm a functionally illiterate moron, or clarify what I'd posted