Please help me get my tv-out display clearer

[Ge|atinousFury]

Well, I've tried everything I know to do...I need your help.

I have my tv connected to my computer via the tv-out jack. The connections go like this:

S-video jack on video card (which is a Visiontek Ti4400) ----->S-video to RCA adapter ----->RCA cable to TV

I do not have the sound cables hooked up yet. I'm just trying to fix the PICTURE. I have clone mode enabled in Nvidia's Nview tab, and the picture of my desktop appears on the television, but it's vertically scrolling.....kind of like when you can't get the antenna of a TV to pick up a station clearly. On top of that, there are vertical lines going up the screen, continuously distorting the image. Those two things combined make for unhappy viewing.

Any ideas on how to fix this?

[Dc5e]

when you mean by scrolling you mean by the whole tv flickering like a monitor when it can't support the refresh rate??

and as for the vertical line that scrolls up, its only one bar going up that is tinted right?? do you have cable?? i had some simalar problem when the tv was hooked up to cable also. Some how it had some feedback through the cable and comp because the ground level between cable and power ground were slightly different. I fixed this by taking a thick copper cable bridging the ground line to the cable splitter. After doing this, the vertical line dissappeared

[shiyan]

are you sure you have the right input channel selected on the TV?

is your present selection the only one that shows your computer desktop?

[Ge|atinousFury]

Originally posted by Dc5e
when you mean by scrolling you mean by the whole tv flickering like a monitor when it can't support the refresh rate??

and as for the vertical line that scrolls up, its only one bar going up that is tinted right?? do you have cable?? i had some simalar problem when the tv was hooked up to cable also. Some how it had some feedback through the cable and comp because the ground level between cable and power ground were slightly different. I fixed this by taking a thick copper cable bridging the ground line to the cable splitter. After doing this, the vertical line dissappeared

Excellent call! As soon as I unplugged the cable input into my tv BOTH problems dissapearred!!! Works flawlessly now....the only problem is I have to keep cable unplugged lol.

I'm not sure I know how to do what you described with the cable bridging and all. Could you explain it in a little more detail please?

[Dc5e]

ok, so does your incoming cable line have a splitter?? and is it by your electrical box??
if you have a multimeter measure the voltage between them two, i'm not sure whether to use ac or dc, try ac first though. If the voltage is like >0 then u should take a 12guage wire and hook it up between the electrical box and cable splitter.

When I tested it, i saw like 2 volts or something, and becasue of the difference i think it created something called a ground loop where it goes through the tv and computer.

on the electrical box, the whole casing should be grounded, so you could probably just loosen a screw and attach the wire to that, then on the splitter there might be another screw, so you attach the other end to it. I'd becareful, use plyers because i'm not exactly sure how much power would go through the wire.
http://dc5e.no-ip.com:85/Cable.jpg

[texp4]

use ATi , they have a higher resolution , thus will yielding better display.

Just my thought

[tuskenraider]

Great idea Dc, I've been trying to get rid of that annoying "wave" going up my screen as well. Someone metioned that over at avsforum but never suggested how to get rid of the ground loop. Any suggestion if my splitters aren't near the electrical box?


From personal experience, you really need to get the s-video into the tv, with the rca it'll always look like crap. So if you have no S-video on your tv your kinda SOL on getting a better picture.........I've used NVidia and ATi cards and it's about the same with both cards. Don't go out buying a ATI All in Wonder hoping for much improvement like I did.

[Dc5e]

if your splitters aren't near the electrical box, then maybe you could hook it up to the nearest outlet to the ground? that would probably work, but then u'd have to find a way to hook it up to the ground without sacrificing a outlet.

[LtBlue14]

S-video cables have a maximum resolution of about 440i, so the picture will always look crappier than a normal TV picture (480i), and way crappier than an HDTV. People usually don't recommend using S-video for good image quality, but if you're not on an HDTV it doesn't matter so much...
hope you got your picture looking normal anyway

[Mr.Guvernment]

Originally posted by texp4
use ATi , they have a higher resolution , thus will yielding better display.

Just my thought

does not matter most standard tv's can only support 640 x 480 and anything higher is an emulation type deal.

newer tv's handle 800 x 600 - but to be frank TV are not made to view text - images okay - but not text in small sizes.

unless u got an HDTV - tv out is only good for movies and some games where you dont need to read the text.


however if you put the text azbove 14 with an 800 x 600 res u can read it fine as i do on my 53" LG with an ATI radeon 7500 - i also used a g4 mx 440 64mb and the res was the same - simply beacase the tv is not great.

[Mr.Guvernment]

Originally posted by LtBlue14
S-video cables have a maximum resolution of about 440i, so the picture will always look crappier than a normal TV picture (480i), and way crappier than an HDTV. People usually don't recommend using S-video for good image quality, but if you're not on an HDTV it doesn't matter so much...
hope you got your picture looking normal anyway



If that is the case why is it prefered to use S-video out from a DVD player to a TV over RCA / Coaxile?(sp?) - on standard TV - or were you refering to strickly HDTV's? -

Even still s-video is still SUPERIOR over RCA whether using a regualr TV or HDTV - it can simply provide better detail.

if you got an HDTV i would hope that one is using the new RCA 3 channel video ? even if you have a satelite box it is better to use S-VIDEO over a single RCA cable.......

S-video gives you higher detail then standard RCA / Coax cable.- but not the new 3 channel video RCA :) that kicks butt!


S-Video is one of the high quality methods of transmitting a television signal from a device such as a Camcorder, VCR, or a Digital Cable terminal. It separates the color information (Chrominance) from the brightness (Luminance), which prevents nasty things like color bleeding and dot crawl, and helps increase clarity and sharpness. You can greatly improve the image quality of the picture by simply converting to S-Video.



Is s-video better then RCA


The image is at least twice as sharp, and the color definition is far superior. Because of this, the image looks a lot "cleaner". Many fine details only become easily visible with S-Video.


i love having S/PDIF via fiber optic cable out from my dvd player to my computer to my 4.1 and 3 channel RCA video out to TV :)



Bottom line is that S-video is superior to

RCA
Coax. cable

So unless you have a component or a cable box that has 3 chan RCA or optics - s-video is your best choice.

[tuskenraider]

Just a clarification, 3-channel rca is known as "component video", not to be confused with "composite" which is standard rca.

[Mr.Guvernment]

^^^ das it!!..lol i have it on ym tv and dvd player and receiver and dont veen know the name of it - just always cal it 3chan rca..lol

[nahmus]

Are there any video cards that have component out? I have a large screen HDTV and would like to play games on it once in a while. I can do 800x600 out from my NVIDIA fine.

any suggestions?

thanks

[nahmus]

I found this post with everything i needed to know

http://answers.google.com/answers/main?cmd=threadview&id=245602