BVM20F1E and Y/C picture quality?

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emuola
Posts: 43
Joined: Mon Nov 04, 2013 6:58 am

BVM20F1E and Y/C picture quality?

Post by emuola »

Running a BVM20F1e "low-miler" (~15000 hours). Bought a BKM-25P add-on board, which has also Y/C capability. I then hooked my beloved C64 to the Sony (Y/C) and the picture quality is really good (it's *not* possible to get rgb out of C64). However, there is a really slight flicker, which is not present with rgb or composite (BKM-25P also supports composite) sources. It almost looks like a low refresh rate usually looks like, but not exactly. Hard to explain :/ Haven't tried other cables, but as I have not noticed the flicker before with the same cable (hooked up to a consumer grade tv set) I suppose the cable is ok.

Is this (flickering y/c) something, that is widely known/easy to fix (a certain setting maybe?)? Unfortunately I don't have any other (y/c) source than several C64s.

Thanks :)
Dochartaigh
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Re: BVM20F1E and Y/C picture quality?

Post by Dochartaigh »

Is Commodore 64 (which I'm not that familiar with anymore) running at 480i interlaced? Interlaced content commonly flickers and is sometimes more visible on a higher end monitor.

Try running a PS2 (a mostly 480i system) if you have one and see if that looks similar.
emuola
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Joined: Mon Nov 04, 2013 6:58 am

Re: BVM20F1E and Y/C picture quality?

Post by emuola »

Dochartaigh wrote:Is Commodore 64 (which I'm not that familiar with anymore) running at 480i interlaced? Interlaced content commonly flickers and is sometimes more visible on a higher end monitor.

Try running a PS2 (a mostly 480i system) if you have one and see if that looks similar.
Actually the (pal) C64 outputs 576p. I wonder if the problem actually is that the Sony expects interlaced video when it's coming via the Y/C? Unfortunately I don't have a PS2 available at the moment. I'll check the manual for the add-on card once more.
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Kez
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Re: BVM20F1E and Y/C picture quality?

Post by Kez »

emuola wrote:Actually the (pal) C64 outputs 576p.
Are you sure about that? The BVM-20F1E does not support 576p at all unless it's a D20. Do you mean 288p?
nissling
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Location: Stockholm, Sweden

Re: BVM20F1E and Y/C picture quality?

Post by nissling »

emuola wrote:Actually the (pal) C64 outputs 576p.
Impossible. 31KHz wasn't even a standard when it was released and Y/C have never had support for that resolution.
emuola
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Joined: Mon Nov 04, 2013 6:58 am

Re: BVM20F1E and Y/C picture quality?

Post by emuola »

Kez wrote:
emuola wrote:Actually the (pal) C64 outputs 576p.
Are you sure about that? The BVM-20F1E does not support 576p at all unless it's a D20. Do you mean 288p?
Sorry, it's 288p :oops: 50Hz.
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