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Canon GL Series DV Camcorders
Canon GL2, GL1 and PAL versions XM2, XM1.


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Old May 24th, 2006, 04:05 PM   #16
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Join Date: Sep 2005
Posts: 4
Quote:
Originally Posted by Fred Retread
Mark,
Go to post #6 in this thread, where Boyd Ostroff corrects my oversimplification of Frame Mode with a Panasonic link that compares frame mode to true progressive in great detail.
http://www.dvinfo.net/conf/showthrea...gl2+frame+mode

What it boils down to is that you get 480 lines of resolution with true progressive, 360 lines with 60i and 320 lines with frame mode. That 40 lines isn't much of a price to pay for for many viewers, used to NTSC broadcasts at 330 lines anyway.

And the subject becomes so deep when deterministic factors mix with probablistic factors (e.g. random pixel straddling of some image edges), and objective factors mix with subjective ones, that there are some experts who will say that even with DVD played on regular TVs you get only about 340 lines.

Anyway, if I interpreted the article at the above link correctly, I don't think that there is any way to deinterlace in post that won't cost just as much in terms of resolution as frame mode.

This is quite annoying. Does anyone know why Canon specifies that the television system in the GL2 is an "EIA standard (525 lines, 60 fields) NTSC color signal" when there is no way to get this resolution out of the camera?

According to the NTSC standard, there are 525 total lines, of which about 486 are usable for video data after retrace, vsync, etc are accounted for.

Why can't I get a 486 line signal out of the GL2? It sure seems like false advertising when the best you can actually expect is in the low to mid 300's.
Jim Kavitsky is offline   Reply
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