[mythtv-users] How I got great quality TV-out on my nVidia MX4000

[Brian J. Murrell]

On Sat, 2005-03-05 at 14:35 -0500, Will Dormann wrote:
> After tweaking settings for quite a bit, 
> here's how I achieved what I believe to be the optimal output.

Hrm.  Optimal meaning "as good as it can get with this card but not
quite ultimate?", or do you believe you have a TV-Out signal that
represents how the content was originally broadcast (i.e. perfectly
interlaced fields)?

> I have 
> an SDTV

Which is just a regular old interlaced 59.94 fields/s TV right?  Is SDTV
"Standard Definition TV"?

> Add to "Monitor" section:
> ModeLine "coryntscpi" 28.6 720 760 824 912 480 484 492 525 interlace

OK.  Seems like you are using the "SDTV native" resolution, so you are
displaying vertical lines "one to one" with what was received and
recorded (presumably).

> 5) In the MythFrontend Setup screen for TV Playback, enable:
> - Deinterlace
> 	- Mode: Bob (2x)

Why de-interlace?

Why not send the interlaced recorded signal you recorded back to the TV
in the format that it expects to be played in, interlaced, with each
field being shown for 1/59.94th of a second instead of combined with
another field and only shown for 1/29.97th of a second.

If you de-interlace you are essentially decimating any temporal (i.e.
movement from one "scene" to another) down from 60/s to 30/s.

b.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : http://mythtv.org/pipermail/mythtv-users/attachments/20050307/1bcda0db/attachment.pgp