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#dab

3 posts3 participants0 posts today

Hört ihr #Radio? Ich habe mich heute mal ein bisschen auf die Sendersuche begeben und da so einige neue Dinge entdeckt. Durch #dab und #Internetradio ist ja die Bandbreite an Kanälen um ein Vielfaches größer geworden. Mich würden dazu aus persönlichem Interesse einmal interessieren: Hört ihr eher LOKAL-Radio, Regionales Radio, Deutschlandweit oder International? Es geht mir um die meiste Hörzeit, die ihr verbringt.

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@LordFlashheart I was debugging a DAB stack as i added Data Packet Services and FEC for that - but packets kept on disappearing and looking for it i found a strict "if (!crc_valid()) { return; }" which made it obvious.

And there is even more - even if you cant really tell the continous counter or the packet stream address you should first apply FEC as the header also may be subject to fixing.

Got all that working now. Receiving GPS correction data now even in "bit flippy environments" with very simple antennas.

Recovering framing on all layers from complete stream drop out needs some love though i guess.

In layered packet networks its hard to decide when to drop a packet.

Does a CRC error on a lower layer say you should drop?

Maybe the layer above has FEC and may correct it?

Apparently people in Spain and Portugal are rushing to FM handeld radios during/since the blackout.

That's cool, although community #radio were probably off the air during the event 🤭

Above all it's a great argument against the current trend of shutting down #FM networks in favor of #DAB

(french) source: mediapart.fr/journal/internati

Mediapart · Mégapanne en Espagne et au Portugal : une expérience des « failles du système »By Yannis Angles