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magicbadger / odr-radioepg-bridge

Creates a DAB EPG bitstream directly from the ODR multiplex configuration file, using RadioDNS to lookup SI and PI documents.
Apache License 2.0
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MOT packet Sequence errors #11

Open nona00 opened 2 months ago

nona00 commented 2 months ago

Thank you very much for your effort. I'm testing transmitting EPG logos with OpenDigitalRadio. I created a multiplex with 2 channels and created the SPI with 4 logos each with ODR-Bridge-EPG.

For decoding the logos I'm using QIRX. Playback of audio channels works, but no logos are decoded.

QIRX is not able to decode MOT directory, it reports many "MOT packet sequence error".

It seems that the data genereted with generate-epg is not correct.

To be able to analyze the issue, I uploaded an 1 minute iq recording of the multiplex:

https://www.file-upload.net/en/download-15390191/ODR.raw.html

Here there was a similar issue reported, where counter discontinuities on output.dat file were observed and could be fixed by adding a padding: https://groups.io/g/odr-mmbtools/topic/possible_spi_transmission_bug/94531007?page=2

Attached is my output.dat

output.zip

nona00 commented 2 months ago

the developer of QIRX analyzed the issue and the sequence error is the culprit. If the check in QIRX is deactivated, the logos do appear.

How can the sequence error be fixed in generate-epg?