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MacTruck
Nov 12, 2005, 11:45 PM
Can HDMI be used in place of DVI? If so why doesn't apple have an HDMI connector? It would be cool because sound goes through it. Would be one less thing to deal with and Cinema displays could have the speakers built in so it would rock pretty solid.

Or does the HDMI spec not support what DVI will?

MacFan25863
Nov 12, 2005, 11:50 PM
HDMI exists for the copy protection, which isn't really needed for a computer set up like that. It offers no advantage to DVI and the optical out on the Powermac or iMac.

homerjward
Nov 12, 2005, 11:52 PM
probably most people who use a cinema display wouldn't want crappy built-in speakers.

MacTruck
Nov 12, 2005, 11:53 PM
HDMI exists for the copy protection, which isn't really needed for a computer set up like that. It offers no advantage to DVI and the optical out on the Powermac or iMac.


Really? How does HDMI provide copyright protection?

homerjward
Nov 13, 2005, 12:02 AM
Really? How does HDMI provide copyright protection?
i believe that's hdcp that's the copyright protection.

MacFan25863
Nov 13, 2005, 12:27 AM
i believe that's hdcp that's the copyright protection.

Correct, but I don't believe I've ever seen an HDMI device without HDCP on it, since it seems content providers are trying to keep this as tightly controlled as possible.


Also, I've heard HDMI has a huge licensing fee (upwards of $15,000). Anyone know about this?

alex_ant
Nov 13, 2005, 12:43 AM
HDMI is just a hardware interface, HDCP is copy protection on a digital signal. HDCP content often flows over HDMI, but it can flow over DVI as well. HDMI is just a way of combining DVI with audio to make cabling easier. It is perfectly possible to run a non-HDCP signal over HDMI just as it is over DVI. It's not possible to strip HDCP from a signal of course (legally), but just as a Mac don't have HDCP-protected DVI outputs, there's no reason they would have HDCP-protected HDMI outputs.

neocell
Nov 13, 2005, 12:49 AM
I thought that there was some data compression with DVI but with HDMI there is none so the signal is more "pure" and therefore better? :confused:

MacFan25863
Nov 13, 2005, 01:05 AM
HDMI is just a hardware interface, HDCP is copy protection on a digital signal. HDCP content often flows over HDMI, but it can flow over DVI as well. HDMI is just a way of combining DVI with audio to make cabling easier. It is perfectly possible to run a non-HDCP signal over HDMI just as it is over DVI. It's not possible to strip HDCP from a signal of course (legally), but just as a Mac don't have HDCP-protected DVI outputs, there's no reason they would have HDCP-protected HDMI outputs.

That's true, but the studios have had so much control over it's creation that they have pretty much forced HDCP onto any device which uses HDMI.