4. One-to-Many Telecom
Specialized Infrastructure
Efficiency: Spectrum, $/bit
Head of the Long Tail
Very large audiences
Live
François Lefebvre, Communications Research Centre Canada
6. DAB / DMB
Features
High speed mobility
Capacity: 1.5 Mbps / channel ( 16 Gb / day )
High bitrate AV & Data:
Typical video to mobile screen: 384-512 kbps
Spectrum:
Band III : 174 to 240MHz
L-Band : 1452 to 1492MHz
Modulation: COFDM
Single Frequency Networks
François Lefebvre, Communications Research Centre Canada
7. CRC DAB Implementation
Transmission
François Lefebvre, Communications Research Centre Canada
8. Typical Tx Rack
François Lefebvre, Communications Research Centre Canada
28. Demo
http://www.youtube.com/crcmmb
François Lefebvre, Communications Research Centre Canada
29. Next ?
• LiveCD: Support more standards: ATSC/MH, …
• Openmokast: Released TODAY as GPL code
• Openmokast: Bcast chipsets into open phones
• Openmokast: Port to Android
• New Applications
• OpenBTS as return link
• Broadcast apps in “App Stores”
• Micro-broadcasting: events,…
• Community broadcasting, remote areas,…
• …?
François Lefebvre, Communications Research Centre Canada
30. Thank you!
PROJECTS
openmokast.org
mmbTools.crc.ca
www.crc.ca/mmb
BLOG
Broadcasting20.org
francois.lefebvre@crc.ca
François Lefebvre, Communications Research Centre Canada