On 2015-01-05 00:45, Ingo Korb wrote: > silverdr@wfmh.org.pl writes: > >> - reconstruct proper, norm compliant, interlaced signal in almost real time > > Yuck, NO! > > Too many devices today already treat the C64's signal as interlaced and > apply deinterlacing methods of varying horribleness to it. This results > in effects such as smeared moving objects, vertical jitter in horizontal > scrollers or temporary vertical shifts. > > It's a progressive video signal, just treat it as such and don't try to > force the display into deinterlacing it - if 240p/288p is a problem, > line-doubling it to 480p/576p is very simple and doesn't need much RAM. It's not a problem of this kind. It's a problem that more and more devices plainly fail syncing to the original signal and producing /any/ usable output. > An example, taken from a PAL Atari ST in color mode (320x200): > > Signal incorrectly treated as 576i and deinterlaced (GBS-8220): > http://snowcat.de/atari/desktop-gbs.gif One of the reasons why I want to give /correct/ 576i on the output rather than the 288p, which (too) many devices don't understand. It wasn't a problem in the analogue displays times (although already in the late eighties there were some problems in the studio environment). But those times are long gone and if we don't do something, soon we'll have no displays to connect those machines to. > Signal correctly treated as 288p and linedoubled (Micomsoft XRGB Mini): > http://snowcat.de/atari/desktop-mini.gif Good. There are devices that understand this type of signal. I have a few broadcast studio devices that understand this type of signal too but more of them don't. Some display a picture with various degrees of heavy distorions. Some just show the virtual finger and say there is no (proper) signal. The same about current consumer displays. It is becoming not even hit-and-miss. It is becoming more and more miss-and-miss. The project is supposed to secure the ability to see something on modern displays. First either through converters/upscalers or through the typical (composite/s-video) inputs. Second (once the first is done and the signal is already also available in the digital domain) through providing a digital output for modern displays. > On the C64, Giana Sisters is a really nice test case for this, but I > don't have a good sample video online right now. Again - I exactly don't want the errors, which I know too well from too many devices not working properly with the VIC's original output. What I want is to make it norm compliant while enhancing/filtering on the way. I had very similar discussion with Gerrit - he also didn't like the idea but I believe that this is because of lack of mutual understanding. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2015-01-05 01:00:03
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