[linux-dvb] DVB/SPI input to Linux?

[Keith Winstein <parport@meta.mit.edu>]

Greetings all,

What's a good way to get a 20 megabits/sec DVB/SPI bitstream (LVDS,
like what comes out of the TD8VSB $360 ATSC/8VSB demodulator:
http://www.rldrake.com/digital/td8vsb.html) into a PC running Linux?

Dektec offers a DVB/SPI PCI input card (http://www.dektec.com/DTA-122.htm),
but it costs $1,100 and goes up to 108 megabits/sec, and Linux
support is unclear. There are various DVB/ASI PCI input cards that do
have Linux drivers for about that price, but SPI-to-ASI converters seem
to be about another thousand dollars.

Is there any better way of doing this? I've been thinking about getting
some comparators to turn the LVDS into a TTL-level eight-channel stream,
and trying to capture it with a PCI IEEE 1284 parallel port. But I'm not
sure if this will be able to be fast enough, even with a PCI parallel port.

Does anybody else have any better ways, preferably less than $600, for
getting a DVB/SPI stream into a computer running Linux? Or, for the
end-to-end solution, for getting an ATSC 8VSB bitstream off of the air
into a computer running Linux?

Thanks,
Keith Winstein
keithw@mit.edu


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