email@example.com writes: > You are right that S-video will disappear earlier than composite, which > will follow soon. Upscalers/converters/etc. will still be available for > some time - then we should have a proper digital output already. From what I've seen it looks like S-Video is almost gone already - current AV receivers don't have S-Video inputs anymore, at least my current TV does not accept S-Video at all (*) and it looks like Lumagen has dropped S-Video inputs from its current generation of video scalers too. All of those examples still support composite and (usually) component video though. (*) The price comparison web site I usually use doesn't list "has S-Video input" as filter option (anymore?), it would be a nice data point otherwise. [PAL color decoding effects] > Actually I wouldn't mourn that much over this loss but no - I wanted to It would be quite bad actually, as far as I know these color decoding effects have been used intentionally on occasion to create additional colors. [replaying the signal with an AWG] > As always ;-) But that's an interesting domain. And idea too. Maybe we > could get an arbitrary waveform generator that would be able to generate > one frame repeatedly and then check the influence of various > modifications. The AWG would need around 500k points to replay two complete fields if you use a standard video sampling rate (13.5MHz). For real video you would probably want 10 bit resolution, but for tests with a C64 8 bit should likely be sufficient. On the sampling side, a modern DSO with large memory and the ability to transfer its memory contents to a PC should be sufficient - I could probably provide you with some sample signals if necessary. > Guessing but I'd say because "my" is expected to be different every > other frame, while yours was surely expected to be the same every I'm still unsure if an interlaced PAL/NTSC video signal is really expected to be different in every other frame - there is a half-line at the beginning or end of the field, but other than that the number of lines should be the same in each field. > Interesting - I haven't seen that many of them but I am probably not > frequenting various web forums enough. Have you seen some good examples? The initial project probably was the modulator replacement circuit in forum64.de which had a "stripe compensation" addition while the details of the circuit and the best way to put it onto a board were still worked out. Recently I've seen new "stripe compensation" and/or modulator replacement PCB designs at least on lemon64.com and on forum64.de (someone actually built a board this time instead of everything getting dragged down with discussions) and I seem to remember a third reference somewhere that I can't find right now. The modulator replacement is just a small circuit with two transistors that provides the proper biasing for the VIC-II outputs and buffers the signals so the onboard modulator can be circumvented. Since that small metal box is also responsible for a bit of crosstalk between the chroma and luma signals, the quality is improved. The stripe compensation (AC-)couples a weak version of the AEC signal into luma to reduce the visibility of the vertical stripes that are very prominent in the output of the 85xx VIC-II. The (reconstructed) original thread for that is at <http://www.forum64.de/wbb3/board2-c64-alles-rund-um-den-brotkasten/board107-sonstiges/board44-bastelecke/44092-hf-modulator-rauswerfen-c64c/> > And those of us > who continue to use CRTs for best experience could still benefit from > better quality picture over S-video/composite. I actually have a Sony BVM-9045 on my desk right next to a 22" LCD TV. For some things the BVM is just much more convenient because it's more tolerant of "weird" signals and switching between inputs with dedicated mechanical buttons is sooo much easier than fiddling with a remote or a single "Source" button hidden at the side of the TV. =) -i 'Wanted: BKM-129X and/or BVM-D9H5E' k Message was sent through the cbm-hackers mailing listReceived on 2015-01-13 18:58:37
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