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

[Ray Olszewski]

At 12:12 PM 5/16/2003 -0400, Mike Frisch wrote:
>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.

You are correct, of course. I meant to pose my request for clarification in 
the context of what MythTV actually does, which is to digitize an analog 
signal (I think it's even analog if you have digital service, since the 
capture is then done over a Composite, or maybe sVideo, feed from the 
ditital-interface box). In that respect, Joseph's response was to the point.

But his reply got me wondering ... to what extent is the benefit of 
increased horizontal dot density limited by encoding parameters? For 
example, if the encoding quality is set at, say, 10 Mb/minute, I'd expect 
that increasing horizontal dot density will at some point hit the limit of 
encoding quality (or maybe CPU speed, but let's put this part aside for 
now). In such a case (if the CPU permits it), would increasing encoding 
quality to, say, 20 Mb/minute allow increased horizontal dot density to 
show improved quality? At what point does the resolution of the NTSC signal 
*itself* impose a limit?