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Old 25th October 2002, 06:24   #1  |  Link
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Unfilter vs. other Sharpen Filters for DVD Rips

I am noticing on some of my DVD rips to VCDs that the picture is not as clear as at least VHS. This may be due to using the TemporalSmoother(2,2) filter. Does anybody have any suggestions for using any type of sharpen filter that would make the standard VCD resolution of 352X240 look a little clearer, while reducing noise.
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Old 25th October 2002, 10:36   #2  |  Link
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One reason could be that VCD has a lower vertical resolution than VHS. I did some test and for PAL I found that the "VHS resolution" seems to be somewhere between 352x576 and 480x576. It seems that you are in NTSC land so then it should be between 352x480 and 480x480. Another reason is that VCD bitrate is quite low and if you sharpen the source then the quality can actually be worse.

But try Convolution3D instead of temporalsmoother. You might get better results because this is a good filter to make it easier to compress without loosing to much details. You could also try without any filters because DVD sources are often very clean as it is. And if you want better resolution try SVCD (480x480 resolution) or CVD (352x480).
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Old 25th October 2002, 15:25   #3  |  Link
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The VHS in PAL countries have one resolution of 480 "pixels" by line. It is a variable value (tape quality, record mode, etc..)

The VHS have 325 - 350 lines (PAL system).

In Croma signal can´t to be compared. Use a crazy system.
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