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Panasonic DVX / DVC Assistant
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Old September 13th, 2003, 10:58 AM   #1
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Playback of pal progressive scan on tv

Just like some clarification.
Is the info recorded onto the dv tape when recording in 25p mode interlaced via a pulldown process?
If so when you playback on a ordinary tv by connecting the camcorder to the tv do you get an interlaced image only?
BUt if you playback on a tv that does progressive scan then the tv deinterlaces the image, is that right?
Finally when you burn a dvd or cd after editing on a computer, is the information on the disc in progressive or interlaced?
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Old September 13th, 2003, 11:24 AM   #2
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DV via analog outputs is allways in interlaced mode. Pull-down like it is known for NTSC is not applicable. Yes you get an interlaced image on a standard TV. Interline flicker will remain just like in original interlaced footage, combing effect will not be present though. Yes, a display which accepts progressive will "deinterlace" the DV video. On a DVD it can be either interlaced or progressive info.
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Old September 16th, 2003, 08:29 AM   #3
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Just one more question. I went looking for a tv set that does progressive. To my surprise I was told alot of these sets playback progressive but output an ntsc signal. Since Australia is PAL land then I wonder if it defeats the purpose of progressive as outputting a ntsc signal will degrade the resolution and color compared to a pal signal. Therefore in PAL land does it matter if the tv does progressive at all. Will viewing the interlaced output from the camera ,after it was recording in progressive mode,on a tv with no progressive scan be much different to viewing it on one that has progressive scan?
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Old September 16th, 2003, 09:28 AM   #4
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What do you mean by "output an NTSC signal". Do you mean "displays" an NTSC signal? Pal is never being converted in NTSC in TV sets. In prog display mode, interline flicker will disappear (which results in a cleaner picture), otherwise there will not be a big difference. In PAL land the high end TV sets all have a much more advanced signal processing than just straight forward progressive display. They perform advanced deinterlacing on all interlaced sources, also have a higher than 50 Hz framerate (75Hz, 100Hz..) they often display more than 625 lines...(800...) and this is being done by full rescaling of the image. Rescaling was a must several years ago when flat pannel displays emerged and this techniques are nowadays being applied in CRT based displays too. (CFR Philips, Panasonic,Sony...)
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