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1080p @ 48hz
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nombz



Joined: 09 Mar 2006
Posts: 119
Location: Stockholm, Sweden

Posted: Sat Jan 02, 2010 8:09 pm    Post subject: Re: 1080p @ 48hz

1031 wrote:
pottzman wrote:
Hi all I am wondering if anyone can tell me which iScan DVDO scalers can take bluray source ie (1080p @ 24fps) and can output 1080p @ 48hz (2:2 puldown)? I have read that my G90 will not accept 1080p @ 24hz and I don't want to display blurays at 60hz (3:2 pulldown) because of the stuttering effect. Can all models do this or is it only restricted to certain models?

Thankyou


Vp-50 is "first" model that can do real (source locked) framerate conversion. Lesser modes can do something..but not real source locked framerate conversionīs.


I am wondering the same thing as the thread author, but cannot really find an answer on which dvdo is needed.
When I look at dvdo's FAQ for vp30 and vp50pro, it says the exact same thing for vp30 (http://www.anchorbaytech.com/support/faq/vp30.php#faq12) and vp50pro (http://www.anchorbaytech.com/support/faq/vp50pro.php#faq13) :


"

Tell me more about the frame rate conversion feature on the iScan VP50PRO

There are 3 basic operating modes for frame rate (or vertical frequency) conversion:

* Source-lock mode where the output frame rate exactly matches the input frame rate.
* Arbitrary output frame rate which is not locked to the input.
* Progressive source-lock mode with frame rate conversion to an even multiple of the source frame rate. 24 Hz film-source material using a 3:2 pulldown pattern can be output with 2:2 pulldown at 48 Hz or 3:3 pulldown at 72 Hz. 25 Hz film-source material using a 2:2 pattern can be output using 3:3 pulldown at 75 Hz. These output rates are fully locked to the original 24 or 25 Hz source rate and are not actually 'floating' as with several other scaler products which offer 72 or 48 Hz output frame rates without really locking to the original film source rate.
"


So what would I miss on the vp30 and what is meant by "real (source locked) framerate conversion"?[/i]

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1031



Joined: 22 Mar 2006
Posts: 657
Location: Finland

Posted: Mon Jan 04, 2010 3:31 pm    Post subject:

I dont remember where it was pointet.. but still, vp-50 is first model that can do correct framerate conversions on HD-material. Yes vp-30 does this also but only on SD-material.
I had vp-30 before i got vp-50.
Firts thing you will notice that on output menu, there are no preset options for framerate (48,60,72) if you feed 1080 material to vp-30.

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nombz



Joined: 09 Mar 2006
Posts: 119
Location: Stockholm, Sweden

Posted: Mon Jan 04, 2010 4:42 pm    Post subject:

1031 wrote:
I dont remember where it was pointet.. but still, vp-50 is first model that can do correct framerate conversions on HD-material. Yes vp-30 does this also but only on SD-material.
I had vp-30 before i got vp-50.
Firts thing you will notice that on output menu, there are no preset options for framerate (48,60,72) if you feed 1080 material to vp-30.


Oh, that is VERY useful information. It renders the vp30 unusable for me. You would think that there would be a foot note in the specs for rightrate where they says this, but no.

Thanks!

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VideoGrabber



Joined: 09 Apr 2006
Posts: 933
Location: Michigan

Posted: Mon Jan 04, 2010 5:23 pm    Post subject:

nombz wrote:
> You would think that there would be a foot note in the specs for rightrate where they says this, but no. <

Yes, it would be logical to think that, but you would be wrong. The Features and Specs sheets for the VP processors appear to be written by a Marketing person, to emphasize all the things it can do, and make it sound as good as possible. For limitations, or things it can't do, they're rather coy. Based purely on logic, you'd say "Well it says X, so I can assume Y", and you'd be wrong. You have to read very carefully, and make no assumptions.

To really find out what a particular model can and cannot do, you have to spend a lot of time reading the discussion forums over on AVS, where the units get picked apart in detail, and the company reps respond to tech questions about the units. You can find out everything you need to know there. Or, do as 1031 did and buy one... then experiment to see what it can't do.

I'm not saying that they're not good units. In fact, I think they're excellent (I have a VP50 myself), and a VP50 (or Pro) would likely work well for you. But clarity and disambiguation in their promotional materials are not their strong suits, either on their web site or their printed literature.

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