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#1
March 17th 07, 10:33 AM
posted to alt.radio.broadcasting,alt.radio.digital,alt.radio.satellite,comp.protocols.time.ntp,rec.radio.shortwave
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NTP over DRM: http://hireme.geek.nz/NTP.html
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#2
March 17th 07, 10:52 AM
posted to alt.radio.broadcasting,alt.radio.digital,comp.protocols.time.ntp,rec.radio.shortwave
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NTP over DRM: http://hireme.geek.nz/NTP.html
Max Power wrote:
NTP over DRM: http://hireme.geek.nz/NTP.html I've just looked at the DAB and DRM specifications, and they both allow the time to be broadcast. -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
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#3
March 17th 07, 10:56 AM
posted to alt.radio.broadcasting,alt.radio.digital,comp.protocols.time.ntp,rec.radio.shortwave
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NTP over DRM: http://hireme.geek.nz/NTP.html
DAB sounds worse than FM wrote:
Max Power wrote: NTP over DRM: http://hireme.geek.nz/NTP.html I've just looked at the DAB and DRM specifications, and they both allow the time to be broadcast. :-) So does GSM, GPS, DVB-T etc. gr, hwh |
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#4
March 17th 07, 11:24 AM
posted to alt.radio.broadcasting,alt.radio.digital,comp.protocols.time.ntp,rec.radio.shortwave
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NTP over DRM: http://hireme.geek.nz/NTP.html .2
Yes, but a BCD Time and Date is transmitted -- not NTP.
NTP is a proven workhorse for time signal distribution -- and can be implemented beyond the WWW. "DAB sounds worse than FM" dab.is@dead wrote in message ... Max Power wrote: NTP over DRM: http://hireme.geek.nz/NTP.html I've just looked at the DAB and DRM specifications, and they both allow the time to be broadcast. |
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#5
March 17th 07, 12:21 PM
posted to alt.radio.broadcasting,alt.radio.digital,comp.protocols.time.ntp,rec.radio.shortwave
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NTP over DRM: http://hireme.geek.nz/NTP.html .2
Max Power wrote:
Yes, but a BCD Time and Date is transmitted -- not NTP. NTP is a proven workhorse for time signal distribution -- and can be implemented beyond the WWW. Why would it be advantageous to adopt this NTP when they already broadcast the time? -- Steve - www.digitalradiotech.co.uk - Digital Radio News & Info Find the cheapest Freeview & DAB prices: http://www.digitalradiotech.co.uk/fr..._receivers.php http://www.digitalradiotech.co.uk/dab/dab_radios.php |
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#6
March 18th 07, 07:39 AM
posted to alt.radio.broadcasting,alt.radio.digital,comp.protocols.time.ntp,rec.radio.shortwave
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NTP over DRM: http://hireme.geek.nz/NTP.html .2
In article ,
"Max Power" writes: Yes, but a BCD Time and Date is transmitted -- not NTP. NTP is a proven workhorse for time signal distribution -- and can be implemented beyond the WWW. NTP has a long history of being able to adapt to or translate strange formats. The important questions are how accurate is the time and what does it cost for the gear to receive it? -- These are my opinions, not necessarily my employer's. I hate spam. |
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#7
March 21st 07, 04:49 AM
posted to alt.radio.broadcasting,alt.radio.digital,comp.protocols.time.ntp,rec.radio.shortwave
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NTP over DRM: http://hireme.geek.nz/NTP.html .2
Max,
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. Dave Max Power wrote: 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. "DAB sounds worse than FM" dab.is@dead wrote in message ... Max Power wrote: NTP over DRM: http://hireme.geek.nz/NTP.html I've just looked at the DAB and DRM specifications, and they both allow the time to be broadcast. |
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#8
March 21st 07, 06:57 PM
posted to alt.radio.broadcasting,alt.radio.digital,comp.protocols.time.ntp,rec.radio.shortwave
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NTP over DRM: http://hireme.geek.nz/NTP.html .2
In article , Kristoff Bonne writes:
Kristoff My guess, the problem is that any time-system needs some way to Kristoff determine the time-delay between the transmittor and the Kristoff receiver. Over a bidirectional IP-network the NTP protocol does Kristoff work very well, but over a broadcasting-network -which is Kristoff unidirectional by nature- it's a different story. ntp has a "broadcastdelay" parameter for this very case. It won't help you figure out the delay, but it will compensate by its value. H |
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