Frame rate confussion

by tiltmonster Jan 28, 2011 5:51PM PST

Can someone offer some delineation between the "24 frame rate" setting, and the 120MHZ, 240mhz, 480, frame rate enhancement processing? I understand that the 24 frame setting, allows for 24 frame media to be exactly matched; and that the other settings(motion-flow on my Bravia) anticipate frames and seem to add frames. I am missing something elementary here; because it seems like one setting is reducing frame rate to 24 (from thirty I think) and the other is trying to add more frames to give clarity(thus giving the soap opera affect). How are they different, and what am I missing in relativity here? Seems like we are going in opposite directions here?

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The manufacturers have begun their SMART picture processing that allows for frames to be inserted between actual movie film frame rates (24) and then they confuse the crap out of everything with a 30 cycle display format (TV) TV is actually a 60 cycle based system but each frame is interlaced with the same info just offset by one line. New displays are 1080 P, the P being Progressive, that's to say there is no interlace, just one frame at a time and the info in each frame is different. The smart functions delay the display function until the frames ahead of and behind can be compared and inserted frames are "worked on" to duplicate without distorting or enhancing the picture info. 60 Cycle is the normal or assumed minimum and 120 and 240 cycle sets will have this smart settings and it doesn't work on all program sources. 120 is sufficient unless it's a projector and 240 is best there.

I think you may have thrown in "resolution" with interlaced and progressive scanning; on top of frame rate and processing? Either that or I am more confused. Say, one "frame" being 1080 lines all at one.....or say 480 lines laced between each other. Both relate to lines not frames. Correct? Resolution P and I are lines within a frame.

"Frame rate" is the number of complete frames per second bounced off the screen, read from the media source, or processed.

The 120 HZ processing speed(smart picture), relates to filling in the frames before and after a frame, beyond that projected by the real media. In affect doubling the frame rate you see.

This seems to indicate, that the 24 frame rate setting for my Blu Ray player; would be leaving the images on the screen even longer, and increasing blur; while the 120 HZ processing on the TV, is jacking up the frame rate from 60 to 120. I am not sure if processing like "smart picture" works on the 24 or 30 frame rate source, or what affect it might have there. Even if smart picture only took 60, and doubled it to 120 frames; aren't we moving backwards here with motion blur; when we select 24 frames? Wouldn't the 24 frame setting on my Blu ray, leave the image on the screen even longer than the 60 frame standard?

Frame rate confussion

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