High Def Forum
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New HDTV Owner

rbinck
05-22-2005, 08:52 PM
Hi. I just purchased a Samsung 50" DLP set and am having some difficulty setting it up with my cable box. I'm attempting to use DVI to HDMI connection, which seems to work OK initially, but when TV is turned off, then back on, the TV doesn't seem to recognize the HDMI input any more, and cable box set-up has to be done all over agian. Can't figure this out - any advice ?

This is a fairly common problem. Unfortunately there is a bug in practically all STBs including cable boxes that require the TV to be on before the STB is turned on. When asked about this, most cable companies will suggest you use the component cables instead.

Try turning on the TV before turning on the cable box. Yes, this means you can't just leave the cable box on. Kinda sucks, I know.

CatManDoo
05-22-2005, 09:04 PM
This is a fairly common problem. Unfortunately there is a bug in practically all STBs including cable boxes that require the TV to be on before the STB is turned on. When asked about this, most cable companies will suggest you use the component cables instead.

Try turning on the TV before turning on the cable box. Yes, this means you can't just leave the cable box on. Kinda sucks, I know.

Ditto:

DVI Problem (http://www.highdefforum.com/showpost.php?p=26162&postcount=3)

TLee
05-23-2005, 08:54 AM
Regarding the Cable box DVI connection bug - are the cable box companies aware of this and taking any action ? Who do you send complaints to ?

Secondly, is the alleged improvement in picture quality worth this hassle of trying to use the DVI/HMDI connections ? I'm gathering from searching through information on this topic that this connection may be more for copyright protection measures than viewer pleasure. Is DVI/HDMI "optimal picture quality" just a marketing ploy to dupe the public ? Comments ?

Regarding cable box to TV set-up -- there seems to be a myriad of combinations of set-up parameters that one could easily get lost and confused in (which I am) :confused: . My HDTV is a Samsung HL-R5067W (DLP technology) which has a built in tuner. My cable box is a Scientific Atlanta Explorer 3250 HD (via Cox Cable).

The cable box transmission signal set-up asks which formats the TV can recognize, and which ones you want to save (ie., 1080i, 720P, 480P, etc.) - should I be saving all formats the TV can recognize, or just one as the "optimum" ? I've read about TV "native resolution" - I can't find this spec anywhere in my Samsung manual. Am I to assume 720P (though during cable box set-up the TV seems to recognize 1080i ?) ??

In the cable box settings, it asks about transmission settings as "Upconvert 1, Upconvert 2, Pass-Through, and Fixed". What does all this mean and what should I be using ?

I noticed you can modify the picture image (ie., panorama, stretch, zoom, etc.) via either the cable box or the TV - which one is best to use ? I also notice that when you use the cable box remote to modify the image, some parameter information momentarily appears on the screen. One of these is the transmission resolution that I believe the cable box thinks its sending to the TV. During set-up experimentation, a picture was on the screen that was clearly hi-def, but the resolution that flashed on the screen said std. def 480P - is this another cable box bug ? Is there a way you can tell what the REAL transmission resolution is (from the TV station) ?

How do I make sense of all the horizontal and vertical black bars that appear with any given TV transmission or channel ? I understand the vertical black bars are 4:3 transmission vs. 16:9, but I've seen top-bottom horizontal bars which I thought should not exist with a 16:9 wide screen TV. I even had one picture that had both vertical AND horizontal black bars - what gives ? When I appear to get a full screen (16:9) non-distorted TV image, I almost kiss the screen.

Sorry to ask so much in one question, but boy, this is one incredible confusing mess (who's in charge here ?). It would be nice if a knowledgeable person would publish a set of "HDTV to TV Set-Up rules, procedures, and caveats" on this forum. Is that possible, or does one already exists and I've not found it yet ? I have a feeling that if someone published an accurate one or two page flyer on this topic and sold it for a dime, they'd get rich. It's hard to phantom the ignorance and finger pointing between the TV retailers and so-called tech support of cable box providers. I'm discouraged to go to the TV manufacturer tech support, because I don't expect much better. Where are the knowledgable, experienced engineers (and techs) who really understand this mess (and can talk layman terms){I assume there's some in this forum}. Help ! :(

RSawdey
05-23-2005, 03:12 PM
Your DLP TV has a native res of 720p. If you want your STB to do all the format conversions, set ONLY 720p output. If you want your TV to do all the conversions, turn on all formats (pass thru mode). Experiment, see which you like better.

You aren't seeing distorted images, but images of several aspect ratios. They don't all fit the shape of your TV, so part of the screen remains unused. A Cinemascope movie at 22:9 will have letterboxing on a 16:9 TV for example. Worst case is a widescreen image letterboxed into a 4:3 frame - then pillarboxed by your TV. You can enlarge this to fill the screen (more or less) with 'zoom' but the quality is limited... I prefer to watch these unexpanded.