hverkuil at xs4all
May 17, 2009, 1:35 AM
Post #3 of 3
(1482 views)
Permalink
|
|
Re: cx18: Testers needed: VBI for non-NTSC-M input signals
[In reply to]
|
|
On Sunday 17 May 2009 04:06:04 Andy Walls wrote:
> 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.
You can't get teletext out of the PVR-350. Only WSS and VPS. It's a hardware
limitation.
I don't have access to my HVR1600 this week, I'll see if I can test it next
Sunday.
Regards,
Hans
> 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
--
Hans Verkuil - video4linux developer - sponsored by TANDBERG
_______________________________________________
ivtv-devel mailing list
ivtv-devel [at] ivtvdriver
http://ivtvdriver.org/mailman/listinfo/ivtv-devel
|
