Re: [Zapping-misc] significant cc data loss on one channel

[Rich K. <ric...@ap...>]

One other thing I'm noticing.  There seems to be sensitivity tied not only
to that channel (San Diego Fox 6), but also to specific programs.  I don't
know if it's half of the programs, but certainly some programs are riddled
with parity errors and garbled captions, while other programs are fairly
clear.as good as programs on other channels.  For example, today, an episode
of Frasier gave me very good caption data, and then the next program started
"That 70's Show", and now I got over 3000 parity errors in the first 5
minutes of that show.

 

I don't know what that means, but again, it's not just the program.  It's a
combination of certain programs on that specific channel.  And if I watch
the captions on a TV, they are perfect.

 

--

 

Rich Kadel

Appeligo, Inc.

(858) 433-1747

 <http://www.appeligo.com/> www.appeligo.com

 

From: Rich Kadel [mailto:ric...@ap...] 
Sent: Wednesday, August 15, 2007 12:36 PM
To: 'zap...@li...'
Subject: significant cc data loss on one channel

 

Currently using 0.2.25 (just upgraded from minor variation on 0.2.22, but it
made no difference to upgrade)

 

I've recently noticed that I get very poor results when capturing closed
captions on at least one channel.  Michael may remember helping me with
something similar about a year ago.  I'm in San Diego, using Time Warner
Cable (NTSC).  Last year the History Channel (channel 56) had an incorrect
clock run-in (off by 1/2 cycle).  This is NOT the problem I'm experiencing
now.

 

Specifically, on channel 6 (Fox), I get numerous parity errors on the order
of 100s every minute.  Occasionally I will get a clear sentence or two, and
then captions will drop out again for a few minutes.  Using osc, the
waveform appears well defined, and appears to be timed correctly compared
with all other channels.  

 

I see nothing obviously wrong except that I have noticed occasional (a few
times a minute, to the naked eye) bursts of "noise" (significant high
frequency waves that appear for a split second and then go away).  That may
or may not cause the problem.

 

I have the same poor results in two completely different locations, so I
don't think it's my tuner card.

 

The video captured from the card looks pretty clean.

 

The captions appear fine on a standard TV, so zvbi appears to be sensitive
to something TV's are not.

 

I'm willing to try some diagnostics or experiments, if given some guidance.

 

Thanks,

Rich

 

--

 

Rich Kadel

Appeligo, Inc.

(858) 433-1747

www.appeligo.com <http://www.appeligo.com/>