Question about hdcp and hdmi.

Energize · 27 Feb 2007 at 19:28

Am I right in thinking that if a hdmi output is connected to a non hdcp compliant connection then no video will be outputted at all regardless of resolution?

Sclodion · 27 Feb 2007 at 20:31

only if the hdcp encryption is enabled on the hdmi output. But any hdmi input is hdcp compliant. The only thing that would be of issue is if you convert your hdmi out to DVI in and its not an hdcp compliant DVI display.

Energize · 27 Feb 2007 at 20:36

Yeah thats what I meant, if you get a hdmi to non-hdcp dvi/component/vga cable.

Sclodion · 27 Feb 2007 at 20:41

So same reply. If your DVI screen is not HDCP enabled AND the HDMI has HDCP enabled, you will get nothing.

If the HDMI output does not have HDCP enabled, youre fine (for now).

If your DVI monitor supports HDCP, you're fine

the cable has nothing to do with it btw, its all about the screen.

Energize · 27 Feb 2007 at 20:47

I thought the hdmi specification required all hdmi outputs to be hdcp enabled otherwise they wouldn't get the license for the device as someone could make a perfect movie copy through hdmi? Hence why the ps3 won't output any video without a hdcp display even for games?

Sclodion · 27 Feb 2007 at 21:59

Energize said:
I thought the hdmi specification required all hdmi outputs to be hdcp enabled otherwise they wouldn't get the license for the device as someone could make a perfect movie copy through hdmi? Hence why the ps3 won't output any video without a hdcp display even for games?

Youre absolutely correct, that the HDMI spec requires HDCP, but there are examples of devices with HDMI outs that do not support HDCP.

There are several professional devices with HDMI out that do not have the encryption enabled, noteably for converting SDI & HDSDI video so it can be displayed on 'cheap' HDMI enabled TV screens.

So, you can connect a non HDCP enabled DVI monitor to an HDMI source, but practically, in terms of consumer equipment, it would be aswell to say 'no, you cant.'

Shimmyhill · 27 Feb 2007 at 22:10

Unless you get a naughty box of course.

Energize · 27 Feb 2007 at 22:19

Shimmyhill said:
Unless you get a naughty box of course.

They exist already?

Shimmyhill · 27 Feb 2007 at 22:35

Energize said:
They exist already?

Have existed for years m8.

Energize · 27 Feb 2007 at 23:08

How can they have when hdmi hasn't been used that long?

Shimmyhill · 27 Feb 2007 at 23:28

Energize said:
How can they have when hdmi hasn't been used that long?

Hdcp has been around for ages m8, it started with DVI and even HDMI has been around for a few years now.