Well ahead of video, audio moved to uncompressed over IP and has been reaping the benefits ever since. With more mature workflows and, as has always been the case, a much higher quantity of feeds than video traditionally has, the solutions have a higher maturity.
Anthony from Ward-Beck Systems talks about the advantages of audio IP and the things which weren’t possible before. In a very accessible talk, you’ll hear as much about soup cans as you will about the more technical aspects, like SDP.
Whilst uncompressed audio over IP started a while ago, it doesn’t mean that it’s not still being developed – in fact it’s the interface with the video world where a lot of the focus is now with SMPTE 2110-30 and -31 determining how audio can flow alongside video and other essences. As has been seen in other talks here on The Broadcast Knowledge there’s a fair bit to know.(Here’s a full list.
To simplify this, Anthony, who is also the Vice Chair of AES Toronto, describes the work the AES is doing to certify equipment as AES 67 ‘compatible’ – and what that would actually mean.
This talk finishes with a walk-through of a real world OB deployment of AES 67 which included the simple touches as using google docs for sharing links as well as more technical techniques such as virtual sound card.
Packed full of easy-to-understand insights which are useful even to those who live for video, this IP Showcase talk is worth a look.
AES67 is a method of sending audio over IP which was standardised by the Audio Engineering Society as a way of sending uncompressed video over networks between equipment. It’s become widespread and is part of SMPTE’s professional essences-over-IP standards suite, ST 2110.
Here, Conrad Bebbington gives us an introduction to AES67 explaining why AES67 exists and what it tries to achieve. Conrad then goes on to look at interoperability with other competing standards like Dante. After going into some implementation details, importantly, the video then looks the ‘Session Description Protocol’, SDP, and ‘Session Initialisation Protocol’, SIP which are important parts of how AES67 works.
Other topics covered are:
Packetisation – how much audio is in a packet, number of channels etc.
Synchronisation – using PTP
What are SDP and SIP and how are they used
Use of IGMP multicast
Implementation availability in open source software
At the IBC 2018 IP Showcase, Andreas Hildebrand explains how AES67 and 2110 work together and how technologies like Dante, RAVENNA and Livewire fit in.
While there are lots of resources for working with 2110 video, but this is one of the few which tackles Audio. Andreas covers one of the ‘gotchas’ in 2110 – the compatability requirements for AES within the standard. He then looks at the timing requirements of 2110 and how they differ to those of AES67 and finally discusses AES3 while explaining the ST 2110-31 standard.
Senior Product Manager and Evangelist for the RAVENNA technology developed by ALC NetworX, Germany,
This is a very accessible overview of AES67 and 2110 from Andreas Hildebrand, evangelist for RAVENNA audio over IP technology at ALC Networx.
Andreas explains what SMPTE 2110 and AES67 are and how they relate to other standards in the industry. He then looks at the timing requirements of 2110 and how they differ to those of AES67 with examples. Another important area examined is when 2110’s audio is/isn’t compatible with AES67.
Finally AES3 is discussed as this is part of the ST 2110-31 standard and Andreas shows how this relates to RAVENNA standards.
Senior Product Manager and Evangelist for the RAVENNA technology developed by ALC NetworX, Germany, Andreas has more than 25 years experience within the Professional Audio & Broadcasting industry.
He is a full-time participant in the AES Task Group defining and maintaining the AES67 AoIP standard. He is also acting as Co-chair of the Technical Work Group of the Media Networking Alliance and is participating in the AIMS Technical WG and the SMPTE ST2110 SVIP standardisation.
Setting up a PTP Network shouldn’t be difficult! Learn from the experts who have seen it all and know the tricks to keep you out of trouble and your IP network system perfectly timed. This webinar will discuss basic synchronization requirements and how PTP can serve them, provide a high-level view of how to clear PTP obstacles in media applications, and then launch into some monitoring and diagnosis best practices. Come, learn, and ask your toughest questions!
SVP and Product Manager
for Networked Audio & Video Solutions
Erling Hedkvist is Senior Vice President and Business Development Manager at Lawo. Mr Hedkvist has been in the broadcast industry since 2000 and started his career in product management before making the move over to sales, business development and corporate management. Mr Hedkvist specialized early on in providing networking solutions for the broadcast and media & entertainment industry. Initially for contribution applications but lately with a focus on providing software defined networking solutions for live production workflows. As such he works with clients to design complete solutions for Remote Production, Master Control, Playout, PCR, OTT and other broadcast applications on top of IP and in a distributed and virtualized environment.
Andreas Hildebrand is acting as Evangelist for the RAVENNA technology developed by ALC NetworX, Germany. His experience is based on more than 25 years of occupation in the Professional Audio / Broadcasting industry. He received a graduate diploma in computer science and worked as a software engineer and Head of Development for companies in Germany and the US for several years. He is a full-time participant in the AES Task Group defining and maintaining the AES67 AoIP standard. He is also participating in the AIMS Technical WG and the SMPTE ST2110 SVIP standardization.
Mike Overton is a Principal Engineer at Tektronix. He has been a HW designer and project lead on SDI, MPEG, audio, signal generation, picture quality, and IP products. For the last 3 years, Mike has concentrated on IP-based systems, encompassing both the PTP reference and the ST2110 essence aspects. He led the definition and development of the SPG8000A PTP master and contributed to the definition and testing of the Prism IP monitor. He is the focal point for many POCs and recently helped define and execute the SMPTE-sponsored interoperability tests for PTP.
Great explanation of how AES67 and @SMPTE 2110 overlap but also where they differ. Including an overview of PTP timing: a perfect follow on from the recent @SMPTEUK meeting on the same topic at Surrey University.
Andreas Hildebrande from ALC NetworkX shows the completeness of the AES67 ecosystem and how different companies interoperate on IABM TV during NAB 2017.
A 3 part tutorial on what AES67 and how to configure AES67 devices.
Andreas Hildebrand, product manager for the award winning RAVENNA Technology starts from the basics, and highlights things to watch for whilst working up to real life configuration over these three articles.