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

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About the speaker

Matthias P. Br¨ andli

Lead developer of the ODR-mmbTools Studied in Lausanne Member of student radio station

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ODR-mmbTools

Contents

• ODR-DabMux
• ODR-DabMod
• fdk-aac-dabplus
• toolame-dab
• Scripts, examples, monitoring, documentation

Everything on http://opendigitalradio.org and GitHub.

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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

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ODR-mmbTools

Single Transmitter

Multiplexer ODR-DabMux Modulator ODR-DabMod USRP Analog stuff dabplus-enc dabplus-enc stream dec

IP IP

Studio B Studio A stream enc Multiplex operator Programme originators

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ODR-mmbTools

Single-Frequency Network

... Multiplexer ODR-DabMux Modulator ODR-DabMod USRP

Includes timestamps into ETI stream

Modulator ODR-DabMod USRP IP Network USRP Time standard

10MHz & 1PPS 10MHz & 1PPS Several km

Time standard Multiplex operator Transmitter site #2 Transmitter site #1

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ODR-mmbTools

Single-Frequency Network on the Scope

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ODR-mmbTools

MOT Slideshow – CSP.it & ODR

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ODR-mmbTools

ARM platform

Odroid U3, Source: Hardkernel website 9 / 13

Monitoring

Buffers

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Monitoring

Encoder Audio Level

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

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Questions ?

http://opendigitalradio.org

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