Re: HDMI to DVI should work shouldn't it?

kim wrote:
"Matti Lamprhey" <matti@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:4datedF18fm5pU1@xxxxxxxxxxxxxxxxx
"kim" <ntscuser@xxxxxxx> wrote...
"Dan Wood" <mr.wood@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote...
A friend of mine has bought a projector with a DVI input. He has a
DVD player with an HDMI output. He has an HDMI to DVI adapter.

We can see the DVD player's menus absolutely fine. If we change
modes on the DVD player (720p, 1080i etc...) then the projector
adjusts and continues to display a perfect image. If we change from
PAL to NTSC then the field rate changes from 50Hz to 60Hz, but
again the projector adjusts and is fine.

However, as soon as we insert a DVD disc all that is displayed is a
light blue flickering screen. We've tried every combination of
settings on both the projector and the player, but nothing works.

Am I correct in thinking that the HDMI signals are 100% compatible
with the DVI ones? The adapter is just a physical transformation
from one connector shape to another? I'd be happier if it didn't
work at all but the fact we can see the DVD player setup menu is
most confusing.

He took the DVD player and HDMI cable back to the shop, and they
tried it all on a Plamsa and it worked fine.

The manual for the projector mentions it has a DVI(M1) input. What
does the 'M1' bit mean?

Projector has been flashed to latest firmware, but no improvement.

Does anyone have any ideas?
A DVD player will not upconvert HDMI from a commercial DVD. It only
works with "home made" discs. Changing the connectors won't make
any difference.
Then how do you explain that fact that it worked alright on a shop
plasma?

Because the shop's plasma probably had built-in decryption via the HDMI
input. All conmmercial DVD's are encryted with CSS. An upconverting player
will not allow an unencrypted signal to be output via HDMI.

(kim)

Are you sure this is correct?

I understood that HDCP was completely separate from CSS and is an option on a HD DVD (ie. HD DVD's don't require HDCP but can have it enabled if the publisher wishes).

If HDCP is present on the HD DVD, it is enforced by the HD DVD player and HD display. If the DVD itself lacks HDCP then the content can be displayed on a non-HDCP compatible display. It isn't a requirement that non-HD DVD's (ie. upconverted) and HD DVD's without HDCP can only be displayed on HDCP displays.

D
.

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