denon 2910 black level 0 ire or 7.5 ire?

[usman24]

I have a denon 2910 dvd player, what is the correct black level setting I should be using on this player. 0 ire or 7.5 ire?

[welwynnick]

Originally Posted by usman24

I have a denon 2910 dvd player, what is the correct black level setting I should be using on this player. 0 ire or 7.5 ire?

IIRC 0 IRE (digital 0/255) is black for a digital PC interface (like DVI), and 7.5 IRE (digital 16/255) is black for a video interface (like HDMI). You should use what the display requires - probably 7.5 IRE. What does the display manual say for the interface you are using?

Nick

[usman24]

hi,

I have no had a chance to read the manual, i am at work at the mo. I am using component inputs at the moment. I have also read somewhere that pal uses 0 ire and ntsc uses 7.5 ire. does this make any sense?

[Engineer]

0 IRE should work best for you since that way the black level will be the same for both PAL and NTSC (since PAL is always 0 IRE). The way to tell is to check for a shift in black level when switching between PAL and NTSC.
It's not related to the 0-255/16-235 DVI thing BTW.
The 7.5 IRE 'setup' is a historic part of the NTSC analogue video specification dating back to the 1950s when 'flyback' lines on CRTs could be a problem, requiring an offset between 'black' and 'blanking' levels. PAL never had this because display technology had improved somewhat by the time the specification was written.

[usman24]

Thanks engineer, that helps out a lot.

For the record, black is 7.5 IRE only for NTSC US. For NTSC Japan is also 0 IRE.

HTH

[Timbo21]

You may need 7.5 ire for DVI/HDMI to pass BTB, which is the ability to see the THX shadow on the THX logo on the THX setup found on things like Finding Nemo, Incredibles etc.; or to be able to see 3rd bar on pluge pattern on DVE setup disc.

E.g. with my 3910 to my Infocus 7205 projector via HDMI I don't get Blacker Than Black, ie no shadow appears on THX logo. When I switch to 7.5 ire I can then pass BTB - shadow can be seen on THX etc. I then have to rebalance brightness & contrast using either DVE or THX setup.

[s7eve]

Apologies if I should be posting this to a separate thread, but I thought it was along the same lines....

Can anyone tell me the difference between the formats on the Denon 2910 and which I should be using to connect via HDMI to a Pioneer 435?
Options are:

HDMI Y Cb Cr
or
HDMI R G B

I'm using the Y Cb Cr (to be honest, haven't noticed any difference when switching between them).

[Engineer]

In theory Y Cb Cr should be slightly better since this is how the video is on the disc, so using this will avoid a conversion of YCbCr > RGB and then back again in the display. In practice it is unlikely you will notice any difference between the 2.

[s7eve]

Thanks Engineer

[mikedelvaux]

Originally Posted by Timbo21

You may need 7.5 ire for DVI/HDMI to pass BTB, which is the ability to see the THX shadow on the THX logo on the THX setup found on things like Finding Nemo, Incredibles etc.; or to be able to see 3rd bar on pluge pattern on DVE setup disc.

E.g. with my 3910 to my Infocus 7205 projector via HDMI I don't get Blacker Than Black, ie no shadow appears on THX logo. When I switch to 7.5 ire I can then pass BTB - shadow can be seen on THX etc. I then have to rebalance brightness & contrast using either DVE or THX setup.

Hi Timbo21 just out of interest how do you set 3910 to 7.5 ire I cant find it any where on the set up menu.

Thanks

Mike.