NA-1 | Networked Audio & Video | R3 | 2018-11-16 | 09:00 - 10:30
moderated by Marc Schettke
Everybody tells me to use IP, somebody is telling me about issues. Nobody can explain.
NA-1-1 | Start 09:00 | Duration 30 min. | Michael Wuest |
Frank Nölken | Talk (English)
IP has come to be the most beneficial technologiy of the past 40 years, providing flexible and interoperable way of distributing information of any kind both locally and globally. Almost everybody is using it everywhere. Most of the time without feeling it. Just in that moment something does not work seamlessly, IP is the devil inside. What really is IP? What does IP mean? And is it really IP we are talking about? Did anybody ever explain some fundamentals to you? Without talking about those OSI layers for hours?
Migrating from legacy Audio/Video transmission technologies to IP based protocols such as SMTPE, H.264, Dante and more leaves technicians with questions such as how to ensure content synchronization at minimum signal latency. But reading any sticker on any brochure is not giving you that faith you have for known technologies. Did you ever experience collisions and congestions in your network? Well, you did and I do not mean in road traffic.
So here comes the news. IP is just a method of addressing devices in your network. Ethernet is the means of transport at that point. Ethernet started it´s life using Coax cabling more than 40 years ago. Just like SDI, but Thick Ethernet cables were yellow, not green. Some basics and fundamentals are still part of our Gigabit Ethernet we use today. Knowing that and having it heard makes it obvious that IPv6 can not help you in your network infrastructure trouble. Learn more in this session.
Debunking the Myths about Audio Networks
NA-1-2 | Start 09:30 | Duration 30 min. | Marc Schettke |
Florian Zeitz | Talk (English)
The current generation of audio network technologies has been around for roughly ten years now. Not only have these technologies lowered the amount of cabling needed, they also allowed convergence of multiple services into one network architecture.
Nonetheless, due to marketing efforts, growing pains and teething problems, a lot of myths about the various protocols and systems have emerged. This talk will try to debunk them as much as possible and provide a unified vocabulary to allow objective discussions.
Control Protocols: Insights into a hot topic, including AES70, Ember+ and NMOS
NA-1-3 | Start 10:00 | Duration 30 min. | Stefan Ledergerber | Talk (English)
While network streaming standards like AES67 or SMPTE2110 are focussing on the exchange of media data, they are deliberately excluding the control aspect of the network and devices. Separate standards like NMOS or AES70 seem to address the missing bits and may also trigger high expectations in regards to standardised control of devices. Will users be able to experience true plug’n play when adding new devices a network, regardless of its manufacturer?
This talk will have a look at the concept of various control protocols like AES70, Ember+ and NMOS and will try to make a connection to overall device control. It will also explain why there will always be limits to standardisation of device control.
NA-2 | Networked Audio & Video | R3 | 2018-11-16 | 11:00 - 13:00
moderated by Marc Schettke
Ethernet AVB as a means to distribute and control sound for Immersive Audio applications
NA-2-1 | Start 11:00 | Duration 30 min. | Richard Foss | Talk (English)
This presentation will describe how Ethernet AVB is used to distribute sound from Digital Audio Workstation software to Ethernet AVB-capable speaker endpoints. The AVDECC control protocol, an open standard, is used to control a signal processing capability on the endpoints. A particular use for this capability is in the field of immersive sound. The speakers can be connected to POE+ switches, thereby enabling the transmission of audio streams, control and power. This eases the configuration of immersive sound systems. The clocking and stream reservation capabilities of Ethernet AVB ensure that all devices work from the same clock, and that stream transmission is deterministic.
AES67 & ST2110 - Commonalities & Constraints
NA-2-2 | Start 11:30 | Duration 30 min. | Andreas Hildebrand | Tutorial (English)
The ST2110 standard defines the transport and synchronization of elementary video, audio and ancillary data essence streams in managed IP networks. AES67 uses the same mechanisms and protocols and thus is consequently referenced in ST2110 for the audio essence transport. This presentation dives into the fundamentals of both standards and eplains the commonalities & constraints between ST2110 & AES67. It also touches on inter-stream synchronization, particularly from the audio view point where sample-accurate alignment of signals is a common requirement. The concept of common system time and the differences between network clock, media clocks and stream clocks are explained. The final key element then is a common (time) reference plane.
MILAN - a new open network standard based on AVB for highest requirements in professional applications
Due to its superior technical capabilities AVB has over years captured attention by many professional manufacturers and users. Being an open IEEE technology standard that enhances Ethernet itself to become a deterministic and synchronized network system AVB has yet not had the required marketing support with regard to its applicability in professional applications. A layer of practical end-to-end interoperability that describes rules for its implementation has been missing so that it was hard to deploy AVB in a way that would facilitate a growing ecosystem of fully compatible products in the ProAV industry.
Leading audio manufacturers - especially Avid, Biamp, d&b audiotechnik, L-Acoustic and Meyer Sound – have since October 2016 closely collaborated and defined an application layer on top of AVB that enables the deployment of AVB in a wide scale of systems and products with guaranteed compatibility while fully enabling all benefits of AVB technology - MILAN. Beside all technical benefits a main motivation for this group of manufacturers was to develop an open standard that ensures a long term perspective for AV networking in a joint initiative together with the IT industry. The involved manufacturers have agreed on developing the topic of open standard AV networking in close long term collaboration and thereby avoiding competitive settings around network solutions. This is a benefit for customers, users and the entire AV industry. The presentation introduces MILAN in detail and leaves time for Q&A.
Konzeption einer IP basierten transmedialen Broadcast Infrastruktur am Beispiel eines führenden Verkaufsfernsehsenders
Eine zukunftssichere Broadcast Infrastruktur ist für den Erfolg eines Verkaufsfernsehsenders wie HSE24 mit vorwiegend Live Programm essentiell. Neben dem klassischen TV wächst die Bedeutung von E-Commerce und Social Media im Teleshopping überproportional. Die Produktionsumgebung muss entsprechend flexibel gestaltet werden, damit diese schnell an veränderte Marktbedingungen angepasst werden kann.
Die simultane Produktion für TV und Social Media muss ebenso möglich sein wie das sukzessive Arbeiten für verschiedene Medien und das ohne Zeitverlust durch technische Umbauten. Außerdem sollte der entstehende Content für E-Commerce, Video on Demand und "Rerun" flexibel verwaltet und schnell angepasst werden können.
An eine IP basierte Lösung führt kein Weg vorbei, jedoch müssen aus Gründen der Sendesicherheit auch weiterhin konventionelle Ansätze berücksichtigt werden. Vorgestellt wird eine Konzeption, die versucht diesen Ansprüchen gerecht zu werden. Im Fokus stehen die flexible Einsetzbarkeit der Studiokapazitäten, die damit verbundene übergeordnete Steuerung und Kommunikation sowie das transmediale Content-Management.
NA-3 | Networked Audio & Video | R3 | 2018-11-17 | 09:30 - 11:30
moderated by Marc Schettke
Keine Panik! ... Es ist nur ein Netzwerk
NA-3-1 | Start 09:30 | Duration 60 min. | Bodo Felusch | Workshop (German)
IT Komponenten in der Signalkette sind kein Trend der wieder verschwindet.
Die Vorteile gegenüber antiquiert wirkender analoger oder digitaler 1:1 Direktverbindungen sind ein Grund dafür. So ist z.B. die physische Verbindung nicht mehr gleich der logischen Verbindung, einmal eingerichtet spielt der Anschlussort von Geräten keine Rolle mehr. Redundanzen können kostengünstig realisiert werden und benötigte Bandbreiten für den Mischbetrieb verschiedener Gewerke sind skalierbar. Ethernet Netzwerke unterliegen einem schnellen technologischen Fortschritt, sind hoch verfügbar und Planungskompetenzen international selbstverständlich. Als medienschaffender Anwender muss man die Grundzüge der Technologie beherrschen um eine sichere Inbetriebnahme und Fehlersuche zu gewährleisten. Häufig wird die Offenheit und Kompatibilität von IEEE Ethernet propagiert doch in der Praxis stößt diese heile Welt der Kompatibilität schnell an ihre Grenzen.
Grenzen die der Teilnehmer des Workshops ebenso kennenlernt wie funktionierende Lösungen für gemischte Produktionsnetzwerke zu verstehen.
Hierbei sollen verschiedene Gewerke über VLANs getrennt und über gemeinsame Backbone Leitungen transportiert werden. Zur Erhöhung der Bandbreite zwischen den verschiedenen Netzwerkpositionen werden Link Aggregation Gruppen eingerichtet und mittels Quality of Service unterschiedlich wichtige Daten priorisiert. Es werden typische Bandbreiten von Audio-, Licht- und Videosignalen in einer IP Welt diskutiert sowie ein Ausblick auf die sich ändernden Anforderungen mit SDVoE (Software Defined Video over IP) gegeben.
Toolbox: Network setup in real - practical hints for setup and fault finding
NA-3-2 | Start 10:30 | Duration 30 min. | Stefan Ledergerber | Talk (English)
IP environments using AES67 compliant technologies are getting real, be it Dante, RAVENNA, Q-LAN or Livewire+. Equipment which was previously connected via simple cables is now using a reasonably sophisticated IP network to send audio/video from A to B. Therefore audio/video manufacturers are no longer able to give guarantees for working interconnections and need to delegate this responsibility to network administrators or even end users. Support calls for networking problems are easily getting inefficient due to the increased complexity of IP environment. It is therefore necessary to build up some level of common knowledge amongst users as to how to trace simple issues on a network.
This presentation gives some practical hints how to setup simple audio/video networks and how to trace problems using widely available tools. It is assumed that the audience already has an understanding of the requirements of AES67 based networks.
AES67 Practical - a Guide on how to setup AES67 Networks
NA-3-3 | Start 11:00 | Duration 30 min. | Andreas Hildebrand | Tutorial (English)
Since its publication in 2013, AES67 has received a wide support from virtually all AoIP device manufacturers. Although it outlines all compulsory protocols and mandates for a very narrow yet useful operating point with respect to PTP, QoS and payload formats, achieving smooth interoperability among AES67 devices from various manufactures still requires some deeper knowledge about underlying concepts as well as on specific constraints related to individual products or the AoIP family they belong to.
If you plan to deploy an AES67 network with devices adhering to different AoIP technologies, like RAVENNA, Dante or Livewire, this tutorial will provide some useful insight helping to avoid some common (and maybe uncommon) pitfall with respect to general network configuration, PTP deployment, multicast and QoS configuration. It will also briefly explain various methods of stream discovery and connection management.
NA-4 | Networked Audio & Video | R3 | 2018-11-17 | 12:30 - 15:00
moderated by Marc Schettke
Troubleshooting Resource Reservation in Audio Video Bridging Networks
NA-4-1 | Start 12:30 | Duration 30 min. | Christoph Kuhr | Talk (English)
The research project fast-music investigates the requirements of an infrastructure for 60 musicians of a conducted orchestra to do rehearsals via the public internet. Since a single server would not be able to handle the required amount of interleaved audio and video streams, process and distribute them again in a reasonable amount of time, a scalable cloud concept is more promising. The design of the realtime audio and video signal processing cloud, at the heart of a distributed live music session in the public internet, is operating on an Audio Video Bridging network segment. Such a realtime processing cloud requires a proper resource management for network resources. In this paper we present the concept for the processing cloud, evaluate on the resource management and discuss a troubleshooting strategy for the stream reservation in Audio Video Bridging networks.
MILAN – Interoperability and Redundancy in Pro Audio AVB Networks
NA-4-2 | Start 13:00 | Duration 60 min. | Arno Gramatke | Workshop (English)
MILAN is the name of a set of implementation choices for AVB/TSN that a group of Pro Audio manufacturers have agreed upon. It defines technical profiles for audio streams, media clock synchronization, and redundancy based on the existing AVB IEEE standards to ensure interoperability between devices from different manufacturers and allow for seamless failover. MILAN compliance will be certified by the Avnu Alliance.
The IEEE standards that make up AVB provide a way to move audio and video over Ethernet with synchronous delivery at all end points and low latency. The standards support a number of options, which created a challenge for users as not all makers supported the same options. For a long time there was no single standard audio format used for AVB networks. This led to problems when distributing signals between devices from different manufacturers. There was also no common agreement for redundant connections, all of which put a burden on the end users. MILAN addresses that problem with a solution driven by end users.
The presentation will give a short overview of MILAN followed by a hands-on demonstration of how to setup an MILAN AVB network for a typical live situation.
Realtime Media Networks Panel - a Q&A Session
NA-4-3 | Start 14:00 | Duration 60 min. | Marc Schettke |
Andreas Hildebrand, Stefan Ledergerber, Bodo Felusch, Michael Wuest, Henning Kaltheuner, Richard Foss | Roundtable Discussion (English)
Transporting realtime audio and media data over ethernet and IP networks is quite common nowadays. Consequently it's a hot topic when planning a new system, for small recording studios as well as for large live venues. On the other hand, not all users are confident using IT-based systems when they are used to rely on point-to-point technologies for realtime data.
In this session we will bring experts in various fields - ranging from underlaying infrastructure to open standard device control - together on one stage, so you can unload all the questions you have.