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HDMI DVI HDCP compatibility

368 Views 5 Replies 4 Participants Last post by GreggPenn, Oct 19, 2004

DV8

Discussion Starter · Oct 19, 2004

I just placed an order for a Panasonic AE700 front projector and started researching the best DVD player to match it. I wanted a player that could use the HDMI port on the AE700 which uses HDCP. I understand that HDMI has to incorporate HDCP as part of its spec.

Several DVD players output DVI as does my ATI Radeon video card without HDCP. Will these work on my Panny AE700? Will my DVI video card work with the Panny AE700? Can I use a DVD player that uses HDMI without HDCP (if they exist)? Are my choices restricted to DVD player that only outputs HDMI and HDCP?

(cross posted in low cost FP)

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GreggPenn

· #2 · Oct 19, 2004

Quote:

Originally posted by DV8
Several DVD players output DVI as does my ATI Radeon video card without HDCP. Will these work on my Panny AE700? Will my DVI video card work with the Panny AE700? Can I use a DVD player that uses HDMI without HDCP (if they exist)? Are my choices restricted to DVD player that only outputs HDMI and HDCP?

(cross posted in low cost FP)

DVD players must output HDCP to work with your projector. There is no such thing as HDMI without HDCP. There are two current DVD players that do not handshake HDCP -- but you won't want to buy one of them -- since your PJ with look for the HDCP "handshake".

I don't know if your video card will work especially if it outputs RGB and PC laws/rules are different. (Another person will need to answer that for you).

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Foxbat121

· #3 · Oct 19, 2004

While it is true that all HDMI DVD players also support/require HDCP, it is not true that HDMI display device can not handle non-HDCP signal. It's up to source to decide to use HDCP or not, not the display device. You will be fine but just like Gregg said, the calibrations on PC video (0~255) are different than DVD Video(16~235).

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DV8

Discussion Starter · #4 · Oct 19, 2004

Quote:

Originally posted by Foxbat121
While it is true that all HDMI DVD players also support/require HDCP, it is not true that HDMI display device can not handle non-HDCP signal. It's up to source to decide to use HDCP or not, not the display device. You will be fine but just like Gregg said, the calibrations on PC video (0~255) are different than DVD Video(16~235).

Thanks for the replies. I think I have it now.

Foxbat, you mention above that the calibrations are different for PC and DVD. Can you explain this a bit more and the numbers you reference above. I have the AVIA DVD and plan on setting up my new AE700 front projector when it comes. Sorry, fairly new to this stuff.

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santellavision

· #5 · Oct 19, 2004

DV8,

There are two digital video standards. PC & Video. Both the source and the display have to work together using the same digital standard. Some equipment manufacturers have used the incorrect standard (Samsung for one) that can lead to an incompatibility.

If your source is sending its digital information with a range of 0-255 (black to white) and the display is looking for black/white to be 16-235, see the issue. Blacks and whites will not be displayed correctly. This has been called 'Black/White Crush'.

It's been more in the source side than the display side. As many PJ's can be set to accept either through a menu setting. So, just be aware when choosing equipment.

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GreggPenn

· #6 · Oct 19, 2004

Actually, I was referring to a recent post which talked about HDMI 1.1 revisions and/or future revisions to copyright law. I was thinking the post communicated the crack-down of transmission of non-digital interfaces without HDCP. In addition, there was a sentence or two regarding different standards being applied to PC interfaces. PC video standards are also different, but I was referring to HDCP regulations.

I forgot where I saw the thread, but I thought it was saying the future will REQUIRE HDCP digital -- unless your source was a PC. I probably took that too literally when I answered above.

I would agree that the lack of HDCP being sent shouldn't prevent any display device from showing material. Otherwise, we wouldn't be able to record home movies on DVD and show them on our TVs.

Now that you made me re-think what was being said, I realize I mis-interpreted the statement. Thanks for straightening me out!

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