Re: Difference in luma-chroma delay of C64/C128 compared to standard S-video

Date: Sat, 2 Sep 2017 13:24:11 +0200
Message-Id: <>
> On 2017-09-02, at 04:10, Mia Magnusson <> wrote:
> It would be interesting to see what you get with a test generator
> compared with a C64. My experience is that composite video is good
> on C64 but S-video is about two dot clock cycles off, with chroma
> coming later than luma.

Maybe put it on the scope rather than digital TV and tell us if it's the same there.

>>> Could it maybe be that the professional displays compensate for
>>> timing issues (by looking at the timing of the color burst v.s. the
>>> sync pulses)?
>> No, the exact opposite is more true. They show things "as they are".
>> That's the one of the main reasons for using them in studios in the
>> first place.
> I would had assumed that they had two modes, "technician" and
> "producer/audience", where "technician" would show all errors but
> "producer/audience" try to show a good picture. (Of course the modes
> would have other names).

Those modes are selected with "scan", "pulse", "blue", .. buttons ;-) Those are used to show more than the audience is supposed to see. But they do not compensate for errors, they are used to spot errors and correct them.

SD! -

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Received on 2017-09-02 12:02:41

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