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

[Joseph A. Caputo]

Sorry, I misspoke...

Based on what I've read in the archives, 640 is a practical maximum width
for capturing NTSC.  Anything higher will simply emphasize the shortcomings
of the NTSC source (be it broadcast or VHS).  Just because you're capturing
at 720x480 doesn't mean you're getting a DVD-quality picture.  The same
applies to PAL, with slightly different numbers.

Basically, crap in == crap out.  Capturing at 720x480 would probably just
highlight some of the crappiness that is less noticeable at lower
resolutions.

Again, this is based on previous posts in the archives.  I have no
first-hand knowledge in this area, other than to say that I see very little
(if any) quality difference between 640x480 and 480x480 on my 60" TV.

-JAC

> -----Original Message-----
> From: mythtv-users-bounces at snowman.net
> [mailto:mythtv-users-bounces at snowman.net]On Behalf Of Ray Olszewski
> Sent: Friday, May 16, 2003 11:39 AM
> To: Discussion about mythtv
> Subject: RE: [mythtv-users] Re: Best video capture resolution for output
> to TV?
>
>
> Please forgive my confusion here ...but in what sense does NTSC
> even *have*
> a horizontal "resolution"? 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.)