Old NTSC tricks: 240p?

[Christian Corti]

On Tue, 17 Mar 2015, Dale H. Cook wrote:
> At 12:24 PM 3/17/2015, Paul Koning wrote:
>
>> When people refer to NTSC as a color encoding scheme, that?s a 
>> shorthand for ?the color TV standard defined by the NTSC?.
>
> "NTSC" is National Television Standards Committee, which determined 
> analog TV standards in the US. The digital equivalent for current 
> receivers is ATSC - Advanced Television Standards Committee.

The Wikipedia article says that the non-colour standard was only a 
recommendation, and that this Committee was reconstituted to standardize 
colour television (and in my opinion drop the analog signal definitions).
The same article then says "NTSC color encoding is used with the System M 
television signal".

The German Wikipedia says that "NTSC is a US American institution that 
defined the first colour television standard [...] The term NTSC was later 
adopted as a generic description for this television system." And as I 
recall it, what you call NTSC is what we call "CCIR System M" - without 
colour (the CCIR and the ITU being much older than the NTSC).

So as I understand it, the NTSC started to define a television signal 
standard and dropped it in favour of the CCIR standard, but became the 
insitution to define the colour standard in the US.

Christian