1. Here Comes Ethernet ® ! P802.1BA AVB Finally…an Ethernet Standard for Audio, Video and Broadcast Applications

2. A Very Short History of Ethernet®  Bob Metcalf and Dave Boggs  May 23, 1973  Xerox Research Center  Packetized data  Collision detection/retransmission  Xerox abandoned computer development  Gave Ethernet to IEEE  An “open standard”.

3. Ethernet and Audio-Video  Collision detection/retransmission  Data not “real time”  Audio or video not “real time”  Monitoring off-air  Maximum delay ?  Easily exceeded in Ethernet bit stream  “Latency”  Multiple source, multiple bit streams  Aligning them increases latency

4. A New IEEE Draft Standard  Not just for audio and video  For all data applications  Addition to the Ethernet standard  Backward compatible with legacy Ethernet  Audio-Video Task Group of IEEE 802.1  “Time-sensitive audio and/or video data streams”  What about existing audio-video Ethernet?  Proprietary versions of Ethernet  Often not cross-compatible

5. A New IEEE Draft Standard  New “bells and whistles”  Bit stream alignment  PTP – Precision time protocol  Two levels of low latency  2 ms through 7 hops  50 ms  Hundred of audio channels (1000baseT)  Actual number of channels limited only by bandwidth  Mix AVB streams with non-critical data  Machine control  Legacy Ethernet applications

6. A New IEEE Draft Standard  Redundancy  Spanning tree or rapid spanning tree  Normal recovery 100ms – 50 ms  Hirschmann recovery – 0 ms  No bits lost

7. Advantages of Ethernet  Very versatile  Very reliable  International Space Station  Nuclear Power Plants  Aircraft Carriers  Easily designed and installed  Made to be reconfigurable  Redundancy  Huge number of IT professional

8. A War Looms on the Horizon  AES Interoperability Standard November 10, 2011  AES “X192” task group chaired by Kevin Gross  IEEE 1733 variant of AVB  Dante  Livewire (Telos/Axia)  Q-LAN (QSC)  RAVENNA  “Interoperability” means the ability for devices operating under various proprietary Layer-3 protocols to easily exchange audio data.  Sponsored by Telos/Axia and QSC “prominent audio manufacturers”  Task group members include  ALC NetworX  Members of the RAVENNA consortium  Network equipment manufacturers

9. Steve Lampen steve.lampen@belden.com www.belden.com