ODR-mmbTools Open-Source Software-Defined DAB+ Transmitter - PowerPoint PPT Presentation

ODR-mmbTools – Open-Source Software-Defined DAB+ Transmitter Matthias P. Br¨ andli <matthias@mpb.li> http://opendigitalradio.org https://fosdem.org Feb 1, 2015 1 / 13

About the speaker Matthias P. Br¨ andli Lead developer of the ODR-mmbTools Studied in Lausanne Member of student radio station 2 / 13

ODR-mmbTools Contents • ODR-DabMux • ODR-DabMod • fdk-aac-dabplus • toolame-dab • Scripts, examples, monitoring, documentation Everything on http://opendigitalradio.org and GitHub. 3 / 13

ODR-mmbTools History It all started at Communications Research Centre Canada 2002 First DAB developments at CRC 2009 CRC-DABMUX open-source Availability of CRC-DABPLUS encoder 2010 CRC-DABMOD open-source 2012 Tools used in production in DK mpb mmbtools-SFN development 2013 fdk-aac goes open-source 2014 MOT Slideshow by CSP.it CRC involvement stops, development taken over by ODR 4 / 13

ODR-mmbTools Single Transmitter Studio A Studio B stream enc dabplus-enc IP IP Programme originators Multiplex operator stream dec dabplus-enc Multiplexer Modulator USRP Analog ODR-DabMux ODR-DabMod stu ff 5 / 13

ODR-mmbTools Single-Frequency Network Modulator USRP ODR-DabMod Multiplexer ODR-DabMux 10MHz & 1PPS ... Includes timestamps Several km IP Network into ETI stream Time standard Transmitter site #1 Multiplex operator Modulator USRP USRP ODR-DabMod 10MHz & 1PPS Time standard Transmitter site #2 6 / 13

ODR-mmbTools Single-Frequency Network on the Scope 7 / 13

ODR-mmbTools MOT Slideshow – CSP.it & ODR 8 / 13

ODR-mmbTools ARM platform Odroid U3, Source: Hardkernel website 9 / 13

Monitoring Buffers 10 / 13

Monitoring Encoder Audio Level 11 / 13

Conclusions Development and testing community getting bigger Tools used in production environment 12 / 13

Questions ? http://opendigitalradio.org 13 / 13