psip-time

This Perl script reads the PSIP data out of an ATSC (North American Digital TV) stream via a SiliconDust HDHomeRun networked receiver. It then sends the PSIP timestamp to ntpd via a shared memory segment. It's a little rough still, but it does work and and can sync within a second of other NTP clocks.

References:

• http://en.wikipedia.org/wiki/ATSC_standards
• http://en.wikipedia.org/wiki/Program_and_System_Information_Protocol
• http://www.scribd.com/doc/56914225/21/The-PSIP-according-to-the-ATSC
• http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver28.html
• http://www.silicondust.com/products/hdhomerun/atsc/