[mythtv-users] Re: Re: Best video capture resolution for
output to TV?
Ray Olszewski
ray at comarre.com
Fri May 16 10:51:47 EDT 2003
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?
More information about the mythtv-users
mailing list