8Vision: Bridge other format Node Audio I/O IP net (LAN) Node Node
9Just another networked audio solution ? RAVENNA?Real-timeAudio& VideoEnhancedNext-GenerationNetworkArchitectureJust another networked audio solution ?
10Market Overview - Existing solutions: SuperMac / HyperMac – based on CAT5 or fiberProprietary point-to-point connection, no network at allLayer 1 – based on physical layer of Ethernet (copper or optical)always proprietary technology, examples: A-Net, Rocknet, SoundWeb, OptoCore, MediorNet et al.Layer 2 - based on Ethernet data link layermostly proprietary technology with “black box” licensing model, examples: EtherSound, CobraNet et al.Layer 3 – based on IPutilizes common “internet” technology (addressing & routing schemes, streaming formats etc.) examples: Livewire, Q-LAN, Dante et al.other (non-relevant) technologies: VisiBlu / FlexIP / PYKO and all IP “codec” solutions (APT, Mayah, Qbit, Prodys et al)
11Existing solutions compared to OSI layer model: Dante & LivewireOSI LayerA-NetEtherSoundCobraNetApplicationPresentationSessionRTPTransportUDPNetworkIPData LinkEthernetEthernetEthernetPhysicalCopperCopper / FiberCopper / FiberCopper / Fiber
12Pro & Cons of existing solutions - layer 1: Aviom’s A-Net ruggedized audio transport systemlow latency (< 1 ms)Adopts to variable sample rateneeds dedicated network, no other traffic supportednot switchable / routablenot scalablesupports only one common sample rate / data formatproprietary hardware - no PC interface available
13Pro & Cons of existing solutions - layer 2: Digigram’s EtherSound proven audio transport systemvery low latencysignificant market penetration, supported by numerous OEMsEthernet compliant (equipment only)switchable (but not routable)dedicated network required (no other traffic supported)daisy-chain topology (flow limitations, prone to single-point of failure)limited scalabilitysupports only one common data / sample rateproprietary technology (under “black box” license by Digigram)
14Pro & Cons of existing solutions - layer 3: Axia’s Livewire fully switchableruns with most standard network switches (but only a few recommended)no topology restrictionsother network traffic supportedproduct palette includes choice of mixing desksPCs can take part in a Livewire systemsignificant market penetration (mainly U.S. broadcast market)separate clock distribution / synchronization (but proprietary scheme)supports two latency schemescapacity scales with available bandwidthonly one native sample rate & data format supportedno support for network redundancyproprietary technology
15Pro & Cons of existing solutions - layer 3: Audinate’s Dante accurate clock distribution / synchronizationflexible latency assignment (w/ low achievable latency)capacity scales with available bandwidth and latency assignmentssupports different sample rates & data formatsother network traffic supportedno topology restrictionsfully switchable (& potentially routable)operates on standard network equipmentintegrated support for full network redundancyPCs can take part in a Dante systemproprietary technology (very strict “black box” license)low market penetration, live segment onlyno experience in / focus on PABM
16Why IP Networking?Cost efficiency: network infrastructure cheaper to install and operateScalability: performance scales with capabilities of network infrastructureFlexibility: allows easy and fast configuration changesAvailability: IP-capable network equipment and infrastructure readily available and widely deployedVersatility: multiple services can share the same networkWAN capability: content can be routed across WAN connections without technology changeConvergence: PCs can participate on the network without sound cardsFuture-proof: IP-based services will grow into all areas of communication
17Why RAVENNA?Based on well-known technology standards and standardized protocolsDesigned to work on existing networksSupports shared services on same networkAllows WAN connections without technology changeNo proprietary licensing policyOpen partnership modelCurrent RAVENNA partners:
18RAVENNA – Fields of Application: Primary focus on broadcasting applicationsIn-house signal distribution in central facilities and regional studiosInter-facility links across corporate networksWAN connectionsOB vansOther applicationsVenue / event installation (sports stadium, hallmark events etc.)Install market (theater, opera, P.A. sound systems etc.)Live market (concert hall, open air etc.)Recording Studios & M.I.
19Basic Components: GPS Ext. Reference IP net (LAN) Node Audio I/O Sync MasterExt. ReferenceIP net (LAN)NodeNodeAudio I/OAudio I/ONodeAudio I/ONodeAudio I/O
20RAVENNA Node – Schematic Drawing: Media Clock GeneratorNICMedia ClockLANADC / SamplerSample Buffer1PacketizerAudio InDAC / SerializerSample Buffer2De-PacketizerAudio Out1 size determined by # of samples per packet2 size determined by play-out delay
21Redundancy Scheme: Node Audio I/O IP net (LAN) Ext. Reference GPS GPS Sync MasterExt. ReferenceGPSGPSExt. ReferenceSync Master 2IP net (LAN)
22RAVENNA Key Features: A layer 3 (IP) solution Can operate on most existing network infrastructuresAllows phase-accurate distribution of media clocksSupports concurrent operation of multiple media clocks and formatsFull bit transparency with all media formatsAllows low latency for real-time critical applicationsSupports QoS for reliable data transferCapacity scales with underlying network infrastructureSupports distribution and synchronization across network segmentsFull network redundancy support
27Q & A:Why another IP technology? Why not extending an existing solution?Why not AVB?Is UDP reliable enough? How can the connection quality be secured (we all know about IP disconnects and losses throughout our daily life)?What happens if bandwidth is exceeded by actual traffic situation?How will different latency requirements / settings be handled practically ?How will the connection management work?What is the difference to the IP codec business – why can they use public networks (internet)?Is RAVENNA only covering audio, or will it be suitable for video as well?
28Q & A: Will RAVENNA be compatible with other solutions? Who is among the early adopters? Why not manufacturer xy?What will be the first products?When will the technology / products be available for the market?How will „old world“ HD-Core and „new world“ IP converge? Will there be a discontinuity?What‘s the benefit for the customer (THAT you should know by now…)
29Summary:RAVENNA is a new technology for audio real-time distribution over IPTarget market: professional broadcast and other pro audio applicationsIt works on existing network infrastructures in shared traffic environmentsIt offers increased flexibility and contributes to workflow convergenceIt features low latency, bit transparency and accurate media clock distributionIt supports full network redundancyIt is an open, license-free technology and based on wide-spread standardsALC NetworX is defining the technology, manufacturers are implementing RAVENNA supportRenowned companies from the pro audio market have already joined
30Thank you for your attention! ravenna.alcnetworx.comContact information:ALC NetworX GmbH Am Loferfeld MunichAndreas Hildebrand Senior Product Manager