Michael Brennan
Forum Replies Created
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Hi,
>Definition of progressive has been made very unclear by marketing of interlace cameras that have processing of the interlace image to create a progressive frame.
>You are correct, but frankly it isn’t Panasonic that has marketed that confusion.
Yes, Sony has done this and it has muddied the water.>Someone correct me if I’m wrong but as I see it All ccds are progressive at the ccd “face”
JAN
>No not all CCDs are progressive at the face.I understand that the TV industry have used the progressive word but in light of the inappropriate use of the word the Sony ad men are not incorrect, as all ccds are progressive at the face.
>Some are interlace, like those on the Z1 camera are interlace.
The output is interlace for sure but at the face they are progressive. So it is impossible to stop the use of this term in the description of cameras.
>Some chips do not have the ability to light up the entire surface,and clock the output at a progressive rate.Progressive clocking defines the description.
>Some do. Some can only “take” a picture of half the info. Interlace chips can only do interlace and interpolate to progressive. A progressive chip is more expensive and can take in the entire picture and clock it out at 60 frames.
Yes we need to use a phrase that desribes the above “progressive clocking chip” would exclude Z1s?
Mike
>A “true” 25p or 30p frame comprises all of the vertical lines from a single exposure/readout of the ccd. Ditto 720 60p. The HDC 1500, Genesis and D20 are cameras that do “true” 1080 60p. (as I understand it)Jan
>Actually we can add to that list of cameras with real progresssive imagers starting with the DVX100 series of cameras, in its progressive modes, the SDX900,the SPX800, and the VariCam.Sure they are progressive, my list is refering to HD cameras capable of 1080 60p output.
Mike
>Sony are calling their new HDCAM XD a progressive camcorder. But the progressive picture is made after the interlace processing!Jan
>Well then this is the source of confusion. Calling a camera progressive when it starts as an interlace picture is confusing. And Canon is calling their HDV camera a 24F camera 24F because they know the difference and are being truthful about the engineering. Progressive capture is a marketing hot button, it really means something and to use it on a product that isn’t really, seems like a deceptive practice. When Panasonic uses it, it is what were are doing.>How will Panasonic use the the p word in relation to the 200?
Jan
>The camera starts with a progressive chip, a 1080/60P chip. In its 24P or 30P modes, or its variable frame modes, it will change to that time base for capture, but it starts as a progressive chip capture and then makes the conversion, cross conversion or down conversion from there. It is a true progressive chip set and will make progressive pictures, not marketing, but rather, engineering.The only mainstream cameras that fall into a 1920×1080 60p capable category are Genesis, D20 and HDC1500 so congratulations are in order for doing true 25p/30p let alone 60p at this price point.
To be clear, you are saying the ccd on the 200 can output true 1920×1080 60p ie where all 1080 lines are clocked from the ccd well at a rate of 60 frames per sec?
To ask the question another way, does the 200 need 60 seperate exposures of the ccd to make a 30p frame? or only 30 seperate exposures of the ccd?
To be clear I am saying that since all ccds are inherently progressive. ie Light hits all the pixels and all pixels are dumped to the well in an instant we need to refine the term.
The phrase, “True progressive clocking” may be best description?
Mike Brennan
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Steve let me know how you get on with this combo as it is exactly what I am considering
Mike Brennan
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Avid DNx was launched as a open codec, with Ikegami Thomson signing up as did Apple.
I’ve just spent the weekend trying to find end any users of DNx on FCP.
No one.
Mike Brennan
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Thanks for the feedback.
Our initial use is simply sending out short clips from the library so we are well within capabilities of G5.For no other reason than having the benifit of a single supplier we will probably stick with Apple for the storage. We don’t really have a FCP boffin amongst us at the moment, so trouble shooting becomes more problematic if 3rd party hardware and software is in use.
I’m sure we’ll have problems, but none of us are betting the farm on this project, just hoping to be a bit more productive with the fields we have:)
I hope the PCI express and the Xraid will integrate with future Gx’s. The G5 will be a relatively low cost item in the system (especially when you consider cost of getting HD onto the raid) so swapping it is feasible.
Mike Brennan
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Is DNx HD working on FCP?
I like the way they keep the sub sampling for HDCAM.
It also has been adopted by BBC who are potential clients so we can send DNx files.Mike Brennan
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Thanks for the feedback.
To clarify I am talking about digitising 10 second to 1 minute duration 4:2:2 1080p clips then exporting back to HDCAM or sometimes exporting sequential tiffs.
Also making some compilation showreels of 2 – 3 min duration.
Nothing long form although we could end up with 100 different compilations
I guess I’d start to do a little basic grading on some of the clips as I shoot flat.It would be handy if more than one computer on site could have simultaneous access to the storage of the full res compilations…
In respect to the question is PCI express a watershed, well I’m hoping against hope that now is better time than last week to jump on board!
From the responses so far the improvement offered by PCI express and quad processing is not out of the ordinary?Mike Brennan
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Before anyone nicks it, “quagd processing” is my idea..:)
MB
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When you hit the Viper LUT and you are looking at filmstream 444 normally exposed daylight scene how does the picture look?
Mike Brennan
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Has anyone used it with filmstream?
Mike Brennan
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Did you hear the fan run at high speed before it switched off?
By and large HD cameras getting too cold hasn’t been a problem so far, so I would look for the more everyday issues as Steve has indcated.
Lets us know how you get on.
Mike Brennan