Tech Focus: AoIP - Networking Makes Inroads in Broadcast Audio Standards governing intercompatibility have helped drive implementation By Dan Daley, Audio Editor
Thursday, May 9, 2019 - 8:00 am
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What a difference a year makes. Networked audio (aka AoIP) had been slowly working its way into the infrastructure of broadcast audio for several years. Broadcasters were looking for ways to assure a consistent and reliable experience with the new format, and their innately cautious nature translated into measured progress.
In the meantime, AoIP made rapid progress in pro-audio applications everywhere else, from music production to postproduction and live sound. In those markets, the costs and intricacies of implementation have been relatively low, as has the risk of moving into them deeply and quickly.
But broadcast's historically slower pace of adoption has increased in the past year, thanks to the finalization of the SMPTE ST 2110 Professional Media Over Managed IP Networks standards suite. Also, standard AES67, which was initially released in 2013, bolstered device intercompatibility; and the cost of entry to networked audio has continued to decline, following digital's Moore's law paradigm.
ST 2110 combined with AES67 has now given broadcasters what they needed to feel comfortable moving into AoIP, and, between this last NAB Show and the one before, AoIP has really taken off in the broadcast sector, says Ted White, global marketing manager, RedNet networked-audio interfaces, Focusrite Pro. In the last 18 months, that combination has given them the standards and the assurance of compatibility they need to feel comfortable about it. There are also a lot more manufacturers incorporating AoIP in their products, which also helps broadcasters feel that it's here to stay. With immersive sound, channel counts will only increase, as will the amount of audio that needs to be ingested. AoIP is the perfect solution for that.
White further notes that Focusrite Pro is a proponent of the AES70 standard, also known as Open Control Architecture (OCA), which defines a scalable control-protocol architecture for professional media networks. We feel the ability to control and monitor devices from multiple manufacturers on a network will be important to the broadcast community.
Lawo's Stephan T rkay sees an obstacle to broadcast audio's adoption of AoIP in proprietary solutions' operating alongside increasingly open standards and protocols.
Not everyone sees a perfect picture yet. Stephan T rkay, senior product manager, networked audio, Lawo, looks to the IT and telco industries for parallels to IP's impact on broadcasting. From that perspective, he says broadcast audio seems still enmeshed in the relatively closed ecosystem it has existed in since networking began to infiltrate the industry, with proprietary solutions operating alongside (though not necessarily in harmony with) increasingly open standards and protocols.
The industry is still trying to figure out what level of interoperability it actually wants to have, he says, citing Lawo's Ember+ control protocol, available as open-source code, as an indication of the company's desire to see broader interoperability standards implemented. In the IT industry, you never needed a Dell printer and Dell switch to work with a Dell computer, and that's how broadcast audio should work as well. Achieving that, he adds, will depend on broad market agreement on open standards.
Uneven Uptake
Josh Rush, SVP, marketing, Audinate, developer of Dante networking protocol, believes that broadcast began evincing practical interest in networking more than two years ago, propelled by both Dante and AES67. However, he acknowledges that broadcasters have been implementing it on an uneven basis: a studio here, a truck there. Dante sought to address that last year with the introduction of AVIO endpoint adapters, which enable connection of legacy analog and digital audio equipment to Dante networks via bidirectional AES3/EBU interfaces.
Other networking ecosystems - Calrec's Hydra2 system in particular - have also been gaining traction. It's not unusual today to see multiple AoIP systems deployed simultaneously: for instance, Hydra was used to move microphone signals around the sprawling downtown-Nashville campus of the recent NFL Draft event, even as Dante was used to transport communications audio, such as intercom. Rush sees that as evidence that AoIP is becoming the norm for remote-broadcast operations.
Dante shines when you need a system that comprises multiple manufacturers' products, he says. But AES67 and ST 2110 interoperability, both of which Dante incorporates, means you can pick the parts of a system you want and they'll talk to each other.
Dante is entering the sports landscape as much on the live-sound side as through broadcast, Rush notes. For instance, the Minnesota Twins' Target Field this season uses Dante to connect remote locations throughout the venue to its control room.
Intercoms on the Rise
Two product categories have led AoIP adoption for broadcast: consoles and intercoms. With consoles, it's largely thanks to manufacturers' development of either proprietary or closely associated network formats, such as Hydra and Ravenna, the latter developed by ALC NetworX in association with Lawo.
Intercom systems, however, have lately been the most prolific implementers of IP signal transport. For instance, Riedel's Artist digital matrix audio and intercom ecosystem, Clear-Com's LQ Series devices, Telos's Infinity IP platform, and RTS's Odin, introduced last year, all incorporate AoIP.
Odin completes and broadens our IP portfolio, says Guy Low, content and creative manager, Bosch, parent of RTS. With the use of two OM
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Tech Focus: AoIP - Networking Makes Inroads in Broadcast Audio Standards governing intercompatibility have helped drive implementation By Dan Daley, Audio Editor 
