23.976 Hz video output issue still not fixed in Ivy Bridge?

[Arkaign]

Aww man that blows goat. My old mans rig is a 2600K and I see the issue with Premiere ,,,,, sighs,, its in Irene I mean Ivy Bridge as well ,,, daz not cool!!!

You wouldn't see that issue unless you were trying to playback 23.97fps content. Authoring, or using basically any decent discrete card, it won't come up.

He's not using onboard Intel video, right?

 

[Khato]

]On this I do agree. It would be interesting to know why some hardware is having problems displaying 23.976 Hz video correctly. In what lies the technical difficulties? How come a multi billion dollar tech company like for example Intel can't get it right, while even "el-cheapo" blu-ray players can?

My guess? Even the 'el-cheapo' blu-ray players are using a base clock that can provide them with an exact 23.976 Hz by combining X number of clock cycles (along with all other supported output frequencies by simply changing the divider.) Meanwhile Intel, AMD, and NVIDIA don't see the value in integrating a separate clock generator for their display output logic in order to get the exact value when they can be accurate to within a thousandth of a Hz. (A 10 GHz clock period would be 0.0000000001 seconds, whereas a 23.976 Hz clock period is something like 0.04170837504170837504170837504171 seconds, which is why you're going to be slightly off with anything other than a clock that's a multiple of it.)

 

[Obsoleet]

Good news for me (in a way).
Waiting for Haswell anyway.

 

[tweakboy]

I must be blind or something, I have never dealt with this issue once on my 2500k and I watch video on it all the time. I have watched netflix, and various other flash based streaming internet video, plus mpgs, mkvs, avis etc. Which types of video are bothered by this any format? I have had video get out of sync with the audio before but it has been due to bad encoding not the system itself. I don't think intel cares much about it because most people probably won't ever know about it or be bothered by it. My buddy constantly streams hulu and various other video to his tv through his i3 2100 system and he hasnt' noticed anything either.

It's not while watching videos. Its when you use it for Video Editing with Premiere that the 23fps happens.

 

[Fjodor2001]

It's not while watching videos. Its when you use it for Video Editing with Premiere that the 23fps happens.

The problem exists when watching videos as well. See previous posts in this thread.

 

[Nemesis 1]

It may exist when watching videos. But I have never seen nor has anyone else around here seen it or noticed it . I think this is brought up more often than not by people who don't care for intel, To each his own . Its your bed you have to sleep in it.

 

[gevorg]

The problem is clearly visible when you playback film video (i.e. not youtube) via HDMI to HDTV. On my SB rig, it is more apparent on Sony LCD while the Pioneer plasma smooth it out and makes it less noticeable. If Intel really did improve 24p on IVB, then it should be a much smaller issue then. If I was building a dedicated Intel HTPC rig now, I would go with a dedicated Radeon/Nvidia card.

 

[Fjodor2001]

It may exist when watching videos. But I have never seen nor has anyone else around here seen it or noticed it . I think this is brought up more often than not by people who don't care for intel, To each his own . Its your bed you have to sleep in it.

I think the reason that some people have not noticed it is that:

* They have not changed the video output to 23.976 Hz, i.e. they keep it at 60 Hz or whatever even when watching 23.976 Hz content. Then the 23.976 Hz problem will of course not be visible, but you'll get 3:2 pulldown or similar instead which is not ideal either.
* They don't watch 23.976 Hz content that much.

Check out what the audio/video enthusiasts think about it:

http://www.avsforum.com/avs-vb/showthread.php?t=1172451

There are about 3600+ posts in that thread, and a lot of them discuss the 23.976 Hz issue (for the IGP in Clarksdale, but the problem is the same).

 

[Robert Webber]

I heard the same from the Ivy bridge official forum. It is true that Intel hasn’t completely fixed the 24fps issue. I am totally disappointed with Intel now. Is it really so hard to produce a proper 23.976Hz video output?

 

[rootheday3]

I heard the same from the Ivy bridge official forum. It is true that Intel hasn’t completely fixed the 24fps issue. I am totally disappointed with Intel now. Is it really so hard to produce a proper 23.976Hz video output?

As indicated earlier in this thread, ivybridge got closer through software tweaks, but getting this perfect required the display clock generator to have the right pll and dividers to generate 23.976- that is a hardware thing and the software fixes can only take Ivybridge so far.

Fortunately, haswell fixes this completely in hardware and generates perfect 23.976 (and 59.94 and a few other strange ones).

 

[Fjodor2001]

As indicated earlier in this thread, ivybridge got closer through software tweaks, but getting this perfect required the display clock generator to have the right pll and dividers to generate 23.976- that is a hardware thing and the software fixes can only take Ivybridge so far.

Fortunately, haswell fixes this completely in hardware and generates perfect 23.976 (and 59.94 and a few other strange ones).

Yes, the Haswell refresh rate is displayed as 23.97605 Hz here (click on the first image there to enlarge it and see the "display" frequency):

http://www.anandtech.com/show/7007/intels-haswell-an-htpc-perspective/4

Not sure if it makes any difference that it's 23.97605 Hz and not 23.97600 Hz. Probably close enough to not matter.

 

[Ben90]

Yes, the Haswell refresh rate is displayed as 23.97605 Hz here (click on the first image there to enlarge it and see the "display" frequency):

http://www.anandtech.com/show/7007/intels-haswell-an-htpc-perspective/4

Not sure if it makes any difference that it's 23.97605 Hz and not 23.97600 Hz. Probably close enough to not matter.

I'm sure there will be those pissed that their video doubles a frame every 5.5 hours, but there comes a point in every persons life when they realize they need to stop being a little girl over things that don't matter.