Old NTSC tricks: 240p?

Paul Koning paulkoning at comcast.net
Wed Mar 18 08:53:44 CDT 2015

> On Mar 18, 2015, at 6:25 AM, Tom Watson <tsw-cc at johana.com> wrote:
> A discussion about sync rates on a TV signal.
> ...
> Many of the broadcast standards have been dictated by governments.  I believe that the 625/50 standard is "CCIR” 

At one time there were at least four B&W video transmission standards in Europe (we had a tube TV with a 4-position selection knob to support them).  625/50 regular, 625/50 inverted in some way (?) used by the Dutch speaking Belgian stations, 819/50 for France, and a different 819/50 for French speaking Belgian stations.


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