AVS Forum banner

1 - 20 of 27 Posts

·
Registered
Joined
·
68 Posts
Discussion Starter #1
Hi,


I've been researching and reading the various threads, messages, and comments on what to do to get the correct 24Hz (23.976) signal out of an ATI HDMI connection.


So to get 23.976 Hz out of my ATI 5850 (CCC 10.9a), do I put it on 24Hz or 23Hz in CCC? I had it on 24Hz, but noticed a slight skip in the picture every so often. My worry is if the good ATI folks didn't know 24Hz is actually 23.976Hz in AV-land, why would 23Hz be 23.976 instead 23.000. I suppose I could try it, but the problem is that I'm running the signal through a DVDO Duo, so I'm worried that it sort of compensates and it is not easily discernible. (Ok, and I'm too lazy to rewire everything).


I'm hesitant to use ReClock, because based on my readings on this forum, it causes problems with Hi-Def Audio bitstreaming, which took me a long time to get working.


Can someone please put me out of my misery? And while we're at it, should I have the 1080i/60Hz on 1080i/59Hz because of the whole 59.96Hz thing?


Thanks in advance.


Cam
 

·
Registered
Joined
·
16,749 Posts
So many people were so confused by 23.876 that ATI and I beleve Nvidia also use 24 for 24.000 23 for 23.976. (The just present the first 2 digits of the frequency and nothing to the right of the decimal point)

I belive from a PC you should also use 59 instead of 60 also so that the audio is properly trasmitted and you don't get stuttering.
 

·
Registered
Joined
·
68 Posts
Discussion Starter #3
Thanks for your guidance, but I still have a couple of problems:


1) There is no 23Hz option in the CCC menu, so I have no idea how to make that happen.

2) When I try to set the 1080i/60Hz to 1080i/59, the CCC changes the resolution to 1080p. It won't accept 1080i/59, but does take 1080p/59.


Just shoot me now...I have no idea why these guys make this so difficult. It's not like they had to invent this stuff from scratch; the AV requirements were defined and implemented before the HTPC vendors jumped in. And they all do it, Intel, Nvidia, and ATI. Very sad...
 

·
Registered
Joined
·
16,749 Posts
So everything works OK as 1080i/60?

What is your souce of 24fps content?

Are you sure your display will accept 1080p/24 over HDMI?
 

·
Registered
Joined
·
68 Posts
Discussion Starter #5
Well, 1080i/60 looks okay but it is harder to catch glitches because it is a TV signal from a cable tuner. The 1080p/24 signal from Blu-ray drive definitely shows the tiny hiccup every 3-4 minutes (using TMT3). I've used a PS3 with my Pioneer Plasma and DVDO Duo for watching BDVD movies for quite some time, so I'm pretty sure the issue is with the HTPC.

One thing to mention is that I had to use an Onkyo receiver's EDID data to get the bitstream audio to work because I have a Denon AVR. The DVDO Duo supposedly passes through the EDID info from the TV and the AVR, but since I overrode it, the CCC thinks I'm connected to an Onkyo receiver. But I don't know why that would impact the 24Hz vs. 23.976Hz thing.
 

·
Registered
Joined
·
68 Posts
Discussion Starter #6
Does anyone think that making a custom EDID file for Pioneer Plasma + Onkyo Receiver (in place of real Denon) would at least give me the option of selecting 1080i/59 and 1080p/23?


Or should I just give up and live with the tiny hiccup during Bluray playback?
 

·
Registered
Joined
·
16,749 Posts
I can't help you any more I don't have an ATI card and I don't have a blue -ray drive.

I do beleive the problem can be solved by someone who a configuration close to yours.
 

·
Registered
Joined
·
440 Posts
I have an ATI 5000 card with TMT3 also and I get stutters no matter what I do
 

·
Registered
Joined
·
68 Posts
Discussion Starter #9
So I figured out that if I uncheck the GPU Scaling, then I see the 23Hz value in the drop down list, but CCC still doesn't let me select it.
 

·
Registered
Joined
·
2,818 Posts
Don't know if this is your issue or not but this is what I had to do in order to get 23Hz and 59Hz to show up in Windows' options. Switching to them in CCC itself was a no-go. Force 1080p24 and 1080p60 should add 23 and 59 to the dropdown.. yes, very confusing...

 

·
Registered
Joined
·
583 Posts
Quote:
Originally Posted by msgohan
Don't know if this is your issue or not but this is what I had to do in order to get 23Hz and 59Hz to show up in Windows' options. Switching to them in CCC itself was a no-go. Force 1080p24 and 1080p60 should add 23 and 59 to the dropdown.. yes, very confusing...

You would lose 24.000 and 60.000 doing this.


The easiest way is to select 23 from drop down list of screen refresh rates .
 

·
Registered
Joined
·
68 Posts
Discussion Starter #12
Okay, so I tried selecting 23Hz from Windows Control Display Control Panel, and that works, but then the problem is that because CCC doesn't support it, I can't use Hot Key's to switch between 23Hz for Bluray movies and 59Hz for watching TV. So I found a solution here:

http://www.avsforum.com/avs-vb/showt...4#post18039274


Which in summary says to create CCC Profiles for 24Hz and 60Hz (really 30Hz Interlaced), and then go into the individual profile files (e.g. 1080p24.xml) and modify the refresh rate values to be 23Hz and 29Hz. So I've tried that and Windows Display Control Panel correctly shows 23Hz and 29Hz Interlaced for each profile, and my DVDO Duo shows the incoming signal at 24Hz and 60Hz interlaced, respectively. The latter validates that 23Hz is really 23.976Hz which shows up in the DVDO as 24Hz (and the same for 59.94Hz/60Hz).


I tested a Bluray movie and didn't notice any hiccups and TV signal also looks good, so the (HTPC) world is once again a better place.


Thanks all for your help with this issue.
 

·
Registered
Joined
·
2,818 Posts

Quote:
Originally Posted by mariner888 /forum/post/19447633


You would lose 24.000 and 60.000 doing this.


The easiest way is to select 23 from drop down list of screen refresh rates .

Not sure which OS you're talking about, but for me on Win7 those options are only available in the dropdown by checking the boxes I showed, and they don't disable 24.0 or 60.0.




Glad you got everything working, OP.
 

·
Registered
Joined
·
332 Posts
does your tv support 24p?


i tried doing it with mine and i get bad tearing about 1/3 way from the bottom of the screen and my tv doesn't support 24p (panny p50s1).
 

·
Registered
Joined
·
583 Posts

Quote:
Originally Posted by camnito /forum/post/19450104


Okay, so I tried selecting 23Hz from Windows Control Display Control Panel, and that works, but then the problem is that because CCC doesn't support it, I can't use Hot Key's to switch between 23Hz for Bluray movies and 59Hz for watching TV. So I found a solution here:

http://www.avsforum.com/avs-vb/showt...4#post18039274


Which in summary says to create CCC Profiles for 24Hz and 60Hz (really 30Hz Interlaced), and then go into the individual profile files (e.g. 1080p24.xml) and modify the refresh rate values to be 23Hz and 29Hz. So I've tried that and Windows Display Control Panel correctly shows 23Hz and 29Hz Interlaced for each profile, and my DVDO Duo shows the incoming signal at 24Hz and 60Hz interlaced, respectively. The latter validates that 23Hz is really 23.976Hz which shows up in the DVDO as 24Hz (and the same for 59.94Hz/60Hz).


I tested a Bluray movie and didn't notice any hiccups and TV signal also looks good, so the (HTPC) world is once again a better place.


Thanks all for your help with this issue.

Modifying the profile xml should work for single monitor configuration, but not as well in dual monitor set up. Need to make sure the actual refresh rate does not revert to 24.000/60.000.
 

·
Registered
Joined
·
583 Posts

Quote:
Originally Posted by msgohan /forum/post/19450926


Not sure which OS you're talking about, but for me on Win7 those options are only available in the dropdown by checking the boxes I showed, and they don't disable 24.0 or 60.0.




Glad you got everything working, OP.

1. Selecting 24/60 actually gives you 23.976/59.940.


2. Any card compliant with CEA-861-E specification ought to support 23.976/24.000/59.950/60.000 out of the box if the monitor's EDID declares support for VIC 32 and VIC 16.
 

·
Registered
Joined
·
2,818 Posts

Quote:
Originally Posted by mariner888 /forum/post/19452236


1. Selecting 24/60 actually gives you 23.976/59.940.


2. Any card compliant with CEA-861-E specification ought to support 23.976/24.000/59.950/60.000 out of the box if the monitor's EDID declares support for VIC 32 and VIC 16.

Bit of a delayed response here, but you're certainly correct regarding the first point. My apologies.


I can't speak to the technical details, but I did have to do a new Win7 install in order to use the SSD I bought the other day, and for whatever reason those rates definitely don't show up for this HDTV on a stock + Catalyst install. On the other hand, my actual Dell monitor has the 59Hz/60Hz options out of the box and nothing lower.




I'm just glad the "force" option works, but if you have another solution I'm all ears.
 

·
Registered
Joined
·
5,447 Posts

Quote:
Originally Posted by mariner888 /forum/post/19452236


1. Selecting 24/60 actually gives you 23.976/59.940.

23 Hz option = 23.976 Hz

24 Hz option = 24.000 Hz

59 Hz option = 59.940 Hz

60 Hz option = 60.000 Hz
 

·
Registered
Joined
·
2,818 Posts

Quote:
Originally Posted by mariner888 /forum/post/19475258


I'm afraid this is the only solution for 4x cards.

Well, this card (4350 silent) doesn't seem to be able to do 60i hardware deinterlacing at a stable rate, so I am looking toward a replacement at some point. Do the 5/6 series have another way to force the refresh?

Quote:
Originally Posted by vladd /forum/post/19475272


23 Hz option = 23.976 Hz

24 Hz option = 24.000 Hz

59 Hz option = 59.940 Hz

60 Hz option = 60.000 Hz

I'm sure he knows that, but in this particular instance selecting 60 doesn't actually set it. It drops back to 59 immediately. Likewise for the other rate.
 
1 - 20 of 27 Posts
Top