Does anyone know why I get parity errors when trying to extract VBI data (e.g., closed captioning) on certain channels?

 

For comparison, on a Windows PC, using a Conexant Falcon-II based card that appears to come from ASUSTEK (it was bundled in the Windows Media Center HP Pavilliion I got), the closed caption comes through Media Center “loud and clear”.

 

However, on Linux (Centos 4.3), using IVTV and the ZVBI library, I have not been able to read VBI on Channels 56 and 57.  55 works fine, as do many other channels.  I have not tested exhaustively, but I think 70 worked fine too, so it doesn’t appear to stop at the frequency for 55.

 

I am seeing this problem with PVR-150, PVR-250, and PVR-500 cards, in two different physical locations (miles apart), but using the same Time Warner cable provider (San Diego).  It is consistent.  No luck with those channels over the last 4 days.

 

Is it the IVTV driver or the Hauppauge cards? I bought them all in the last 2 months, and there are a variety of tuners (TCL, Phillips, Samsung, and LG) on these cards.  I believe I’ve tested with all of those varieties.  The Tuner appears NOT to be the variable.  The picture seems to be fine as well, using the Hauppauge cards.

 

I have not yet tried one of the Hauppauge cards in Windows Media Center, so yes I will do that next and let you know.

 

Thanks,

Rich

 

--

 

Rich Kadel

Know'bout, Inc.

(858) 433-1747

www.knowbout.com

 

Do you know about Know'bout?

 

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