[mythtv-users] Re: Re: Best video capture resolution for output to TV?

[Mike Frisch]

On Fri, May 16, 2003 at 08:39:29AM -0700, Ray Olszewski wrote:
> Please forgive my confusion here ...but in what sense does NTSC even *have* 
> a horizontal "resolution"?

It must have a horizontal resolution when it's being stored in a digital
medium.  Look at DVD, for example.

> I understand that the vertical resolution -- 480 real, out of 525
> theoretical, lines, in two interlaced frames -- is well defined. But I
> thought the horizontal signal was continuous, not discrete, making the
> relevant question the appropriate rate at which to *sample* it for
> digitizing.  (There is probably a theoretical answer to the
> sampling-rate question too, but I've never seen it explained.)

Sorry, I cannot comment here.  I do not know the mathematics involved in
this approximation.