[mythtv-users] Simple Question About TV Out Quality

[Alan Snyder]

It is hard to see how picture quality can, as a rule,
exceed what you get from a standard TV on the cable.

In the standard TV, the cable signal is decoded by 
the tuner and the resulting video is displayed.  With
Myth (or TiVo, or Replay), you're substituting a
different tuner and some additional signal processing.

If the tuner on the card is better than the TV's
built-in tuner, the picture could be better, if the
compression/decompression of the video does not
degrade the signal.  Strictly speaking, any lossy
compression (such as mjpeg, mpeg2, mpeg4) will
result in some degradation - it's just a matter of
whether it's noticable.

In principle, additional signal processing within
a digital system could remove noise that was in the
analog signal off the cable.  There's also the
potential for the digital system to correct dynamic
range problems and so forth.  But it's still an
inserted processing step and improvements over a 
clean original signal should not be expected.

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of
Michael Starks
Sent: Wednesday, October 22, 2003 9:26 AM
To: mythtv-users at mythtv.org
Subject: [mythtv-users] Simple Question About TV Out
Quality

I have read dozens of posts comparing the quality of
various cards.  One

thing that escapes me is if quality, in general, is
always at least as good

as a standard TV using basic cable.  Yes, I realize
that different TVs have

different quality; I'm just looking to know what I can
expect in general.

I'd rather not plop down hundreds of dollars only to
be disappointed that I

have to live with reduced picture quality for
increased functionality.

Thanks.



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