Old NTSC tricks: 240p?

Paul Koning paulkoning at comcast.net
Tue Mar 17 11:24:13 CDT 2015

> On Mar 17, 2015, at 11:41 AM, Mouse <mouse at Rodents-Montreal.ORG> wrote:
>>> I'm trying to understand at a low level how some early computers and
>>> game consoles generated a non-standard form of NTSC.  [...]
>> This has absolutely *nothing* to do with NTSC or PAL (or SECAM or
>> whatever).  NTSC etc. are colour encoding standards and don't
>> describe in any way how a image signal is generated (fields, syncs,
>> timing).  [...]
> You might want to update Wikipedia, then; its article on NTSC begins
> its second paragraph with
>   The first NTSC standard was developed in 1941 and had no provision for
>   color.

Sounds right to me.  NTSC is the standards body.  When people refer to NTSC as a color encoding scheme, that’s a shorthand for “the color TV standard defined by the NTSC”.

> The PAL article, though, _does_ say it's a colour encoding scheme;
> SECAM too.

And indeed those two acronyms name a particular color transmission mechanism.


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