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Re: Cineframe 30/Cineframe 25 resolution loss vs. 60i

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Re: Cineframe 30/Cineframe 25 resolution loss vs. 60i
by Steve Mullen on Dec 21, 2004 at 6:13:00 pm

"Instead, I'm saying that it looks like in CF30 the camera skips the field-blending and low-pass filter and lets the full raw resolution of one field pass through."

Are you thinking the CCD does not row-sum in the CF modes?

It's true that that is a way of gaining maximum field V rez. But, then sensitivity should be about 6dB less in CF modes. Is it?

I think in the CF modes, interlace video is always input frpm the CCDs. Then, for static OBJECTS the full V rez should be obtained. For OBJECTS in motion, the V rez -- which you can never measure -- is about 410-lines.

IF you are measuring V rez (static) at about 600-lines -- then it seems far more likely Sony has limited static V rez so the difference between static and dynamic is less obvious. (See the other posts on motion issues.)

In short, you really need to consider that the deinterlacing is part of MPEG-2 encoding. Thus, it works nothing like the other cameras.






























Steve Mullen
Digital Video Consulting
www.mindspring.com/~d-v-c
===
HDpartner Prime -- Real-time 1080i and 720p HDV Editing with FCP HD
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