NPR stations that use RDS are only accurate to within 100ms, due to RDS's time transmission design flaws. No accuracy or traceability mechanism exists for RDS-TC (Time Clock, or TS: Time Service) service. IP packets are of no meaning here, RDS cannot really encapsulate them.
This is a non-TCP_IP use of NTP. NTP is a data transmission format for time separate of its IP4 and IP6 multihop measurement mechanisms. NTP over DRM: http://hireme.geek.nz/NTP.html > NPR currently uses NTP to synchronize the local broadcast time to the > satellite feed. The crucial issue is to encapsulate the compressed audio > in IP packets, not the other way around. I suspect PBS might do the same > thing as well, as their programs start time deltas are be in the low > milliseconds relative to UTC. The DRM page cited is riddled with errors. > Somebody (me?) should send a comprehensive bug report. ================================================== >> Yes, but a BCD Time and Date is t deltasansmitted -- not NTP. >> NTP is a proven workhorse for time signal distribution -- and can be >> implemented beyond the WWW. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
