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Need advise on best connection option...

03-30-2005, 10:07 AM
After much shopping and research, I finallydecided on--and bought-- a Mitsubishi WD52725 DLP TV. I picked up a hi-def cable box from my local Comcast office last Friday; had the set delivered Saturday; and connected the STB to the TV with the component cable(s) supplied by the cable company. Being Easter weekend and all, I really didn't get to watch too much TV, but over the past couple of nights I have probably watched a total of 6 hours; trying out the TV settings as I watched. I must say I'm very happy with the set, and the display/reception is better at my home than I had seen in any store but one (and they had a satellite feed.)
Sorry for the boring background info, but now to my main point: is the component connection the best input for this TV? What are my alternatives? The STB is a 3250B (Scientific Atlanta? -- I honestly forget the brand right now as I'm not at home writing this) with component and DVI outputs.The cable company provided component cables but said the box is capable of DVI output. The TV has component input, HDMI input, and DVI input...BUT... the jacks are labeled DVI AUDIO input. (I was under the impression that DVI is VIDEO only.) The DVI output jack on the STB is for a totally different shape all-in-one connector. The TV 2 jacks are just RCA-type female
receptacles like the ones for the component--and a zillion other--cables that can be plugged into this TV.
I know that HDMI is supposedly the pest possible connection, but I'm "saving" the HDMI jack on the TV for a new DVD player I'll be buying. For now I haven't connected anything else to the TV--not even my home theater--because I want to get each piece working to its best capacity. When I get the best picture quality I can from the STB, I'll hook up the receiver and speakers. Then I'll add in the DVD player and maybe eventually a TIVO. (I was also thinking about trying an external antenna for finding additional high-def stations not on the Comcast system, but that's another issue.) THANKS IN ADVANCE FOR ANY SUGGESTIONS/ADVICE! :hithere:

03-30-2005, 10:18 AM
Since DVI is a video only connection, they've supplied a related set of stereo audio jacks. It's the same with SVideo & Stereo for SDTV. For real surround, you'll need a digital SPDIF connection run to a decoding surround amp.

HDMI combines DVI & digital audio... simplest copy protected connection.

I recommend AGAINST getting upconverting players, since you TV has good upconversion built in.

Since the native resolution of your DLP is 720p/60, that's the output res you should select in your sources.

03-30-2005, 01:34 PM
I'm not concerned with audio, (I have an Onkyo 601 a/v receiver and 6.1 surround speaker system to run the audio through), but I'm still somewhat confused with video resolution settings for the best picture quality. My STB sends 1080i resolution to my TV, so I assume my TV is then "downgrading" it to 720?

Further, since you advise not bothering to get an upgradeable DVD player because my TV will upgrade the signal from the DVD player, do I: 1) still want/need a DVD player with HDMI output ? and 2) are there DVD players out there with HDMI output that do not have the signal upgrading circuitry that's built in to my TV?

So I would assume that my choices for connecting my STB to my TV are either component--as it is presently--or getting a DVI to HDMI cable and using the HDMI input in the TV for the STB. Do you think the DVI/HDMI option would result in better broadcast picture quality than using the component input?

If so, that would leave me using component connections for any DVD player. Since my TV "up-converts" input signals with its own circuitry would there be much of a difference in picture quality using component input from the DVD player to the TV compared to using HDMI input?

I realize the "pushing the envelope" on your time and knowledge, but I'd be grateful for anything you--or anyone else reading this post--can pass on to me. After shelling out a bundle of cash for one of these TVs, any smart consumer would want to be sure the TV is used to its best performance level.

03-30-2005, 10:46 PM
Converting between 720p/60 & 1080i/30 is called crossconversion. Your TV MUST convert everything to 720p/60 because is it's native hardware resolution. It has an array of mirrors 1280 wide by 720 high. When you output the non-native res 1080i, received 720p signals are converted to 1080i and back again... degrading picture quality of what should be your best signal. Your TV is a progressive scan display that supports a 60 Hz framerate... feed it the signal it wants. 720p.

It's not 'upgrading', it's 'upconversion'... just a way to put an SDTV image (720 x 480) on a high res screen... it can't invent detail. For real HDTV on a disc, we have to wait for BluRay & HD-DVD in the fall. The upconverting DVD players use an HDMI output because their upconverted signal is copy protected. Quality is very similar to component at the same res. Any decent progressive scan DVD player with component output will give you a good picture.

Your TV's format converter won't even need to be used if you feed the TV 720p. All conversion is occuring in the STB then... if you put your STB into 'pass thru' mode where it passes the format as received, then all conversion would occur in the TV. Just don't do it in BOTH places...

03-31-2005, 09:47 PM
a suggestion,
try connecting the cable feed directly into your tv. use a splitter to accomplish this. connect the coax to ant1 or 2, it doesn't matter.

now have the tv search for available channels, it will find all of the available analog channels, AND all the non-encrypted HD channels (any regular broadcast channel, ABC,NBC,etc)

This, IMO, gives the best results for SD and HD. The cable box is taken out of the loop entirely, and your set can perform to it's fullest.

You will still need the box for PPV and premium channels, ESPNHD, INHD, and so on. But it is a vast improvement for SD/HD broadcast channels.

03-31-2005, 09:54 PM
also, when doing this, I actually had to do the search twice. Cox had a ton of empty digital channels. So many, in fact, that the tvs guide screen couldn't memorize them all. So you may have to go through a bunch of garbage channels to find the HD ones. Write down the good channels, and then do the search again, but press 'cancel' after the analog channels. Now manually add the HD channels and you are good to go. Trust me, it's worth the effort.

04-01-2005, 11:44 AM
Wouldn't you need an built in HD tuner inside your TV to accomplish this?

04-01-2005, 10:43 PM
yes, an integrated tuner, or an outboard one that also has a qam tuner is required.

many people do not realize that they can get all of the broadcast highdef for free this way, without a box. This is federal law.