Old NTSC tricks: 240p?

[Paul Koning]

> 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.

	paul