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In Reply to: Re: video cable length question posted by Larry on December 20, 1999 at 08:47:58:
Hi Larry,The Video and Audio systems are not meant to be incorporated together nor do I plan on anything more than watching rented movies played on a VCR or DVD. No surround sound or anything, just a playback machine and a TV. That eliminates the concern about the long speaker wire (I went for short speaker wire and long interconnect in the audio system). But seeing some of the players out there may be a good bit better than my current cd changer (for audio purposes), I thought I'd put it by the other audio gear and run wires to the TV which could mean needing wires from 20 to 40 feet. That considers running wires along baseboards - not to mean the TV is actually 20' to 40' from the audio gear.
"direct component video cable runs(3) "
What is component video cable?
"Even with a composite run of this length"
What does composite mean?
From your description, one needs 3 runs of cable to get all the left, right, and video info from the DVD player to the TV? I guess that means DVD players don't have that coaxial output that has all the info to be sent via one cable like my VCR does, or that hook-up method is not preferred?
Thanks again for the info....
Many DVD players today have component video outputs(Y,R-Y,B-Y). Also called analog color difference video. This uses three jacks, and separates the video signal into it's color difference components, each signal carried on it's own coax 75 ohm cable, which has RCA, BNC, or F-type connectors. This gives you the best picture and should be used with DVD whenever possible.To take advantage of the component video outputs of your DVD player, your tv needs a set of component inputs. Next down in video quality is s-video (Y/C video), which separates the video signal into it's luminence(Y) signal and it's chroma(C) signal. This uses a single s-video cable which actually contains internally 2 75 ohm coax or twisted pair. These have 4pin DIN connectors at both ends. Composite video combines the luminence and chroma signals on one coax cable and should not be used with DVD, if avoidable, because composite video generates format conversions which cause Y/C separation artifacts that degrade the video quality.Best case: 3 75 ohm coax cables(RG-6 coax) from DVD player component video output to tv component video input.
Next best case: 1 s-video cable from DVD player s-video output to tv s-video input.
Worst case: 1 coax cable from DVD player composite video output to tv composite video input.
Note: all the above is in regards to video only. You still need to deal with the audio. From your ?s, I gather you don't plan on any Dolby Digital 5.1 (DD), or Pro-Logic surround sound decoding? Some DVD players have a basic DD decoder and can output the 5.1 channels individually, otherwise you need an external processor or AV receiver for this, and use the digital output of the DVD player (Dig coax, or toslink). Then you need enough channels of amplification for your application and speakers for each channel, with or without a subwoofer(usually has it's own internal amp). But it sounds like you just want to route L and R audio to the TV's built in speakers. In this case, you simply run inexpensive audio IC from the DVD player analog audio L and R outputs(usually RCA) to the tv's analog L and R audio inputs.
Larry
I don't think that could have been answered any better! Thanks!I now understand how your set is, those 3 cables from your DVD player to the projector are all for video. I don't know why I was thinking any audio was included going to just a projector. So you don't have a problem with long audio interconnects from the DVD to the processor (or amps if processor is in the DVD) as they are all in the same place I guess? Well, before anything can happen, I have to get that TV first, maybe in the next few months. I'll look out for the component inputs you mentioned.
Thanks again!
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