awalls at radix
May 16, 2009, 7:06 PM
Views: 852
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cx18: Testers needed: VBI for non-NTSC-M input signals
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Hi,
Thanks to a loaner PVR-350 from Hans, I've been able to implement VBI
support in the cx18 driver for non-NTSC video standards.
If you've got a 625 line PAL, SECAM, etc, video source and can test VBI
functions on a CX23418 based card, I'd like to hear how it works. The
patches for testing are here:
http://linuxtv.org/hg/~awalls/cx18-av-core
http://linuxtv.org/hg/~awalls/cx18-av-core/archive/tip.tar.bz2
I've only been able to test with PAL with VPS in field 1 line 16 and WSS
in field 1 line 23. I wasn't able to figure out how to get Teletext B
out of the PVR-350, so I'd certainly like to hear if Teletext is
working.
Note: to implement Raw VBI for 625 line/50 Hz systems to extract line 23
(WSS), I had to blank one extra line in each field. This means that
625/50 systems will be missing 1 line from the top of each field (e.g.
line 24 won't show). I thought that was better than having the fields
move up or down around if the user turned VBI on or off.
Regards,
Andy
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cx18: Testers needed: VBI for non-NTSC-M input signals
