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DVI to HDMI connection help CRTs?

boatbuilder
10-17-2005, 10:27 AM
I have read in a previous post that utilizing the DVI connection on a CRT rear projection tube HDTV set does not help at all...is this statment true? My SA8300 HD box has hdmi output connection and my ADVENT HDTV 30' TV set has DVI connection. I bought a DVI to HDMI Monster Cable 4' HDMI-to-DVI Video Cable

Model: UV V600HDM


is it pointless to even use this cable or should I just stick with my component connection?
Please advise.
Thanks
:confused:

rbinck
10-17-2005, 10:59 AM
In theory the DVI connection will not help because the CRT is basically an analog display, so the signal needs to be converted from digital to analog somewhere. It boils down to being converted in the TV or in the STB and which device has the best converter.

Where you get the best technical improvement is with fixed pixel dislays like the plasma, LCD, DLP and LCOS displays which are digital type displays and the analog conversion is not necessary. With this type display using the DVI/HDMI connection will avoid unnecessary digital to analog and analog to digital conversions.

Now having said that, I would also note that displays are notorous for being set up by the factory to help compensate for extra bright showrooms and I have found they punch up the component connections quite a bit and in those cases the DVI connection would give a better out-of-the-box picture. Nothing that a ISF calibration does not fix though which should be done on any CRT based display, imo.

boatbuilder
10-17-2005, 12:04 PM
So when you use component connection from the SA8300 HD box...is the signal right that is going thru those component cables to the TV in digital format? So basically you don't save any conversion by using the HDMI/DVI connection...correct?

rbinck
10-17-2005, 01:00 PM
No. Component signals are analog. They are just at a much higher frequency than NTSC video. DVI/HDMI are digital connections.

boatbuilder
10-17-2005, 01:19 PM
So if analog signal is getting to the TV set then is the set converting back to digital? Would I cut out any conversion by using the HDMI/DVI connection?

marknyc
10-17-2005, 01:19 PM
I just bought a Sony XBR800 CRT, and bought a DVI-I cable. Sounds like I should return it unopened? I just picked up a new DHTV cable box (Pioneer BD-V3510HD) which has a DVI output. Is there a chance that the Sony might do a better job of converting the digital signal to analog than the cable box would? I only spent $13 on the RadioShack cable, so it's not a big deal to keep it.

Also, I bought a DVI-I cable - is that the right one to use with this set?

Thanks for all your help - hard to find answers to this stuff from the manufaturers!

Mark

RSawdey
10-17-2005, 03:56 PM
You don't need DVI-i, which is both analog (DVI-a) and digital (DVI-d) signals. You only need the DVI-d for HDTV.

marknyc
10-17-2005, 04:02 PM
I thought that, but since both cables (DVI-i and DVI-d) were the same price, I got the DVI-i. That's okay, right?

The real question is, do I need a DVI cable at all, or should I just use the component video instead?

boatbuilder
10-17-2005, 04:43 PM
Ok...I still need to know if I use this HDMI/DVI monster cable connection from my SA8300HD box to my Advent 30' HDTV set with DVI connection...

ORRRR...........


I just use component from box to set...


If the HDMI/DVI cable is a "digital connection" is the signal being put thru it from the box a digital signal? or does it carry it in analog to the TV?

What would you all use ?? PLEASE advise.
Thanks :

ja2935
10-17-2005, 07:12 PM
Presumably your Monster Cable is unopened - if so take it back and get a cheaper cable from Walmart or somewhere.

Try both cables (HDMI/DVI and Component) and see which looks better to you - use your own judgement! Forget the theoretical, keep the one you like best and watch some tv - that's why you got it!

Emsurfer
10-18-2005, 03:34 AM
You don't need DVI-i, which is both analog (DVI-a) and digital (DVI-d) signals. You only need the DVI-d for HDTV.

I would even go further to say that your Pioneer BD-V3510HD probably has a DVI-D female connector and may not work properly accepting a male plug from a DVI-I cable.
:eek:

Digiti
10-18-2005, 08:14 AM
I have a SA 8300 HD STB attached through a HDMI male to DVI D male cable to my Samsung TXP 3064W CRT TV. The picture shows negligible difference over the component connection in PQ. However using this connection frees up a component connection for other uses. When the broadcasters get their way certain programs will be broadcast in HD only through the digital copy protected connection HDMI or DVI, all others will get the standard definition picture only.
There are some annoyances with the HDMI/DVI connections that you may experience such as establishing a good "handshake" between the SA8300and the TV so you do not get a HDCP error. You must turn on the TV first set to the HDMI input then turn on the cable box afterwards so prevent this error. Also the changing of TV channels is slower because the conversions in resolutions and aspect ratios seem slower with this connection.
You can get very good cables from www.monoprice.com so the Monster cable is just a waste of money IMHO.