Professional Networked Media Ethernet AVB: The next step in broadcast infrastructures Jan Eveleens, CEO jan.eveleens@axon.tv www.axon.tv Live Production as we know it Key challenges in current infrastructures (lack of) flexibility Topology (central router) Supporting new standards Cabling Specific for our industry Dedicated one cable per signal (type) Uni-directional A LOT…… A typical example Green-field installation (UK): 157 x 78 x 410 x (!) Analog audio distribution amplifiers Digital audio distribution amplifiers Analog CVBS distribution amplifiers Mostly for reference distribution 1018 x (!) Digital video (SDI) distribution amplifiers Total required rackspace: 93 x 4RU frames = 372 RU approx. 10 x full-height 19” Racks !!! Many, many kilometers of coax cable, thousands of BNC connectors And this just for reference and signal distribution…….. Live Production infrastructures: the next wave ! today Ethernet 3 Gbps HD-SDI SDI Composite Why going Ethernet in Live Production (1) ? Required link speed available now 40.000 10.000 Mbps 1.000 100 10 1 1989 1994 1999 VIDEO 2004 2009 2014 ETHERNET and affordable: A 10Gbps ethernet port is already cheaper than a 3Gbps SDI I/O Sheer size of ethernet industry drives innovation and cost erosion Ethernet switch market > $20B (10Gbps switch market already > $10B) Compare this to: total SDI router market: ~ $300M…… or even total broadcast equipment market: ~$16B . Another interesting datapoint: revenu of Cisco (2012): $46B…. Strong Ethernet roadmap going forward Ethernet (backbone) link speed expected to hit 1 Tbps (!) in the next decade !! Why going Ethernet in Live Production (2) ? Allows distributed architectures Full bi-directional/duplex connections Multiple (different) signals multiplexed/transported on one cable Video, audio, (meta) data, control, monitoring, etc Also supports standard ‘legacy’ traffice (files, emails, etc) Drastically reduce cabling Save costs (cables, connectors, install), space and weight (!) SDI A central router Central reference with distribution Already quite some Ethernet equipment Many cables, often in big parallel bundles 9 AVB 10 AVB Central reference With no additional distribution A distributed router 11 How to make Ethernet work for real-time applications Audio Video Bridging (AVB) 12 Time Synchronization Traffic Shaping Bandwidth Reservation Configuration What are the key AVB standards ? The key standards for AVB are: IEEE 802.1BA: Audio Video Bridging Systems IEEE 802.1AS: Timing and Synchronization for TimeSensitive Applications (gPTP), IEEE 802.1Qat: Stream Reservation Protocol (SRP), IEEE 802.1Qav: Forwarding and Queuing for Time-Sensitive Streams (FQTSS) IEEE 1722: AVB payload transport layer protocol. IEEE 1722.1: AVB discovery, enumeration & control protocol 13 Typical characteristics of an AVB network All nodes are fully synchronised to a (very stable) network clock Allows very accurate recovery of media clocks SDI can be recovered within broadcast quality jitter specifications Audio clock can be recovered maintaining phase relation Low latency: typically 2ms overall network delay Allows for complex/distributed networks (multiple hops) The network self-manages bandwidth reservation such that links will never get overcommitted and/or packets are dropped Uses multi-cast, so only one copy of each active source on any given link or backbone 14 What can be transported with AVB ? The following elements are part of IEEE 1722 transport protocol: PCM audio in various sample rates SDI video (with embedded video and audio) Raw, uncompressed video 1080p video at ~2Gbps (!) Time-sensitive data (eg ancillarily or metadata) IEEE 1394 formats So this also enables transport of compressed (MPEG-TS) streams RTP formats 15 A very important element: interoperability Ensuring that AVB nodes talk to AVB nodes AVnu Alliance 16 Who/what is AVnu Alliance The AVnu Alliance is an industry forum dedicated to the advancement of professional-quality audio video by promoting the adoption of Audio Video Bridging (AVB). The organization creates compliance test procedures and certification processes that ensure interoperability of networked AVB devices. 4 key markets: Professional Audio Professional Video Consumer Automotive 17 Founding Members of the AVnu Alliance 18 AVnu Alliance members 19 How real is Ethernet AVB ? 100Mbps, 1Gbps,10Gbps and 40Gbps Ethernet AVB switches are shipping Several professional AVB audio products on the market from several vendors: Audio processors, audio consoles, speakers, etc Intercom systems First broadcast quality AVB video products have started shipping AVnu certification process is up and running 20 Summarising the key benefits of Ethernet - AVB Based on existing and open standards from a very reputable and succesful standards body (IEEE) Provides one framework for time-synchronised, real-time transport of video, audio and data Proven technology that is available now: large professional AVB audio systems being deployed in the field Interoperability is going to be taken care of: AVnu alliance Plug-and play : no conflicts or fiddling with IP addresses, etc Fool-proof: the network is self-managing, it does not rely on the skills of network engineers or a (proprietery) software management layer. Perfect co-existence (and reserved bandwidth for) with standard IP traffic (eg. control, monitoring, etc) 21 Questions ? More info can be found at: http://en.wikipedia.org/wiki/Audio_Video_Bridging www.avnu.org www.axon.tv