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Tech Head - The Technology Section
Raspberry Pi
Raspberry Pi RDS FM Transmitter with German satellite channels
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<blockquote data-quote="Adam792" data-source="post: 1061097" data-attributes="member: 330868"><p>I've been doing a bit more experimenting with this. Have managed to get it to use the RDS data transmitted alongside the French TDF feeds on 5°W (11480H) too. These are different to the German stations because the UECP RDS data is transmitted on a separate PID to the audio rather than inside the audio stream. The data on these is easier to decode because they're not in reverse order, but some of the PIDs carry the RDS for more than one station!</p><p></p><p>Stations like Virgin Radio and RTL2 dynamically change the RDS PS like the German ones do to show the song playing information.</p><p></p><p></p><p></p><p>This information is definitely present in the French TDF RDS streams over satellite - in the PIDs labelled "TDF RDS". Lots of packets with the identifier 0x30 (the UECP code for TMC traffic data). I've also found the same in a couple of the PIDs on 30°W 11302H/11382H (the two transponders carrying all the feeds of RNE Radio in AAC alongside the DTT feeds), so I think these must feed RTVE's FM transmitters with this data alongside the radio station audio. I didn't find the RDS Radio Text or Traffic announcement flagging in any of these streams on there though.</p></blockquote><p></p>
[QUOTE="Adam792, post: 1061097, member: 330868"] I've been doing a bit more experimenting with this. Have managed to get it to use the RDS data transmitted alongside the French TDF feeds on 5°W (11480H) too. These are different to the German stations because the UECP RDS data is transmitted on a separate PID to the audio rather than inside the audio stream. The data on these is easier to decode because they're not in reverse order, but some of the PIDs carry the RDS for more than one station! Stations like Virgin Radio and RTL2 dynamically change the RDS PS like the German ones do to show the song playing information. This information is definitely present in the French TDF RDS streams over satellite - in the PIDs labelled "TDF RDS". Lots of packets with the identifier 0x30 (the UECP code for TMC traffic data). I've also found the same in a couple of the PIDs on 30°W 11302H/11382H (the two transponders carrying all the feeds of RNE Radio in AAC alongside the DTT feeds), so I think these must feed RTVE's FM transmitters with this data alongside the radio station audio. I didn't find the RDS Radio Text or Traffic announcement flagging in any of these streams on there though. [/QUOTE]
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Raspberry Pi
Raspberry Pi RDS FM Transmitter with German satellite channels
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