Old NTSC tricks: 240p?

[Jonas Otter]

On 2015-03-18 14:53, Paul Koning wrote:
>> 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
>
>
>
There are a number of CCIR 625/50 standards, as well as other CCIR/ITU-R 
standards for other broadcast systems. CCIR was a precursor to ITU-R, 
which is a UN agency, in common with the FAO, the ICAO, the ILO, the 
IMO, the IMF, etc etc.