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HDMI to DVI over Cat5

post #1 of 7
6/16/11 at 10:24pm
Thread Starter 
There is a Runco TV in the home I just bought. The Runco only accepts DVI (or component video). All wiring is in an upstairs closet, and there is only cat5 connections behind the Runco. I have a new Panasonic Blur-Ray player (DMP-BDT210P) with HDMI out. My thought/hope was to convert the HDMI signal to DVI (through a simple adapter), then transmit the DVI signal through an Atlona DVI over ethernet Extender to the Runco. While I can transmit a computer signal, I cannot get any signal transmitted from the bluray player. Does this have anything to do with copyright protection in the hardware that prohibits the HD signal out of the bluray player to be transferred via cat5e to the Runco? Or could it be something else? Thanks!
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post #2 of 7
6/16/11 at 10:32pm
You are the first person (I've seen) trying to send HDMI over CAT to DVI.

I'd say, yes you need something else(even a simple speaker set) on the other side first. You need audio for the TV anyway...and this here, might do the trick...

http://www.amazon.com/Onkyo-HTX-22HD...8288753&sr=1-1

I think, more likely know, the problem is there is no audio/video sync at the Runco end. Adding in this Onkyo set(or any other HDMI equipped soundbar) would create the sync it needs.

I have a feeling the reason why the computer works is...
1. It doesn't care what is on the other end(lack of HDCP)
2. The audio isn't set up to leave the computer over HDMI(hence, there is no sync it needs like the BD player)
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post #3 of 7
6/17/11 at 7:36am
Thread Starter 
Actually there are speakercraft speakers in the ceiling that I intend to use. All of the wiring (speakers and cat5 behind the Runco TV) terminate in an upstairs closet. My issue is that the TV only has DVI and component inputs, but the source components I intend to use are all HDMI out. So I need to get the HDMI signal converted to DVI, and I need that signal to travel over cat5. So I guess either I can first convert to DVI (through a simple adapter) and then send that signal to the TV via cat5 through my Atlona adapter. This is what I tried to do. Or, I guess I could send the HDMI signal over cat5, and then convert the signal to DVI at the TV end. I don't need any audio as the AVR will generate that to the ceiling speakers. Does this make sense? Thanks for any help.
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post #4 of 7
6/17/11 at 10:38am
Quote:
Originally Posted by dcs_vid View Post
There is a Runco TV in the home I just bought. The Runco only accepts DVI (or component video). All wiring is in an upstairs closet, and there is only cat5 connections behind the Runco. I have a new Panasonic Blur-Ray player (DMP-BDT210P) with HDMI out. My thought/hope was to convert the HDMI signal to DVI (through a simple adapter), then transmit the DVI signal through an Atlona DVI over ethernet Extender to the Runco. While I can transmit a computer signal, I cannot get any signal transmitted from the bluray player. Does this have anything to do with copyright protection in the hardware that prohibits the HD signal out of the bluray player to be transferred via cat5e to the Runco? Or could it be something else? Thanks!
Is this your converter?

http://www.firefold.com/Atlona-AT-DV...3686C1640.aspx

If so, the bandwidth is less than what is needed for a 1080p/60 signal. I'm not even sure what a DVI 1.1 spec contains since the DVI organization disbanded years ago.

And, yes, everything in the HDMI chain would have to be HDCP compliant. So, the converters and the DVI equipment would all need to enforce HDCP for the Blu-Ray to work. This will also be true with any modern computer video card.


Try your Blu-Ray at 1080i or 720p and that may work.
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post #5 of 7
6/17/11 at 5:49pm
Thread Starter 
No, it's this Atlona extender.

What I think I will do is return this extender and get an HDMI extender instead, and then convert the HDMI signal to DVI at the TV side of things.

Do you know if this chain will cause any HDCP issues?: HDMI --> cat 5 (extender) --> HDMI (on TV end) --> DVI (via adapter into the TV).
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post #6 of 7
6/17/11 at 8:52pm
Not all DVI Inputs are HDCP compliant!

Your first test ought to be HDMI (BD Player) to DVI (Display) using a short HDMI to DVI cable or an HDMI cable plus HDMI to DVI adapter.

Start with no disc in the BD Player (no HDCP) if that works then try inserting a Disc - now you'll see if HDCP is an issue on the DVI port.

You'll need to ensure the BD is set to output a signal (720p, 1080i or 1080p) the Display supports on it's DVI port.

Joe
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post #7 of 7
6/18/11 at 9:10pm
Quote:
Originally Posted by dcs_vid View Post

No, it's this Atlona extender.

What I think I will do is return this extender and get an HDMI extender instead, and then convert the HDMI signal to DVI at the TV side of things.

Do you know if this chain will cause any HDCP issues?: HDMI --> cat 5 (extender) --> HDMI (on TV end) --> DVI (via adapter into the TV).

Try what Joe said in his response. That should confirm that HDCP is honored throughout the chain. Remember one item that does not recognize HDCP means no signal.

I went through the documentation and I didn't see a mention of HDCP in my quick scan of the specs and owners manual. I noticed that the 1920x1200 is constrained to about 50 feet.
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