Broadcast audio at the 2016 Rio Olympics demonstrates the rapid uptake of IP-based audio transport in the industry. Much of that is taking place out of sight, in the domain of intercoms and other back-channel communications. But the efficiencies and cost-effectiveness of IP will be more broadly apparent in the near future.
New Kid in Town
In an approach suggesting how extensively and how quickly IP-based audio transport will impact broadcast audio, ESPN is using a new product from a relatively new brand in broadcast audio. Henry Rousseau, senior operations manager, remote production operations, ESPN, says he encountered Audivero and its Unity Intercom product on the fringes of NAB 2014. The app-based platform, he explains, can be deployed as a standalone intercom with six partylines and point-to-point communications using a Mac Mini or Windows server and iOS or Android devices connected over Wi-Fi or cellular networks. Unity can also display camera-preview and program tally and integrate with existing hard-wired intercom systems.
ESPN's Henry Rousseau oversaw implementation of Audivero's Unity Intercom in Rio.
I was very skeptical at first, but, after talking with the rep and playing with it, I was amazed that it really worked, Rousseau says. They [just] did not how to integrate it into an intercom system for broadcast use. IFB was a foreign [term] to them.
ESPN subsequently deployed the Unity system at several small productions, but it proved itself during the rain-plagued UEFA's European Championship matches in Paris in June.
Our set was practically underwater, and a temporary location was found at Paris Television Center, Rousseau recalls. We were able to put together a comms system from spare parts that we brought with us. But, with no [camera-control units] to connect to, our camera operators had to rely on telephones or listening to the IFB. I had brought a Unity system with me to test, but never did I think we would actually use it on-air. We established channels for cameras, IFBs, A2s, and coordination. The server was connected at the IBC to our [RTS] ADAM frame using a MOTU 896mk3 analog audio interface.
He adds that, despite some understandable connectivity issues with such a new approach to intercoms, the system worked well enough to include in the network's audio strategy for Rio 2016. ESPN's facility at the IBC there supports ESPN Brazil, Argentina, Caribbean, and Latin North, plus SportsCenter. The Unity system proved its worth early on and again under stressful circumstances.
While setting up the IBC, we encountered some issues with the 46 VoIP lines we were configuring for our coordination and IFB hybrids to support the 16 Dejero [video-over-IP] systems we are deploying throughout Rio, he explains. We anticipated having everything ready by Monday before the Opening Ceremony for Argentina to go live. However, they wanted to go to air live on Sunday. That left us with the option of communicating with talent and the remote producer via a desk phone or take the chance and use Unity. We chose Unity.
ESPN's engineers opted for an RME Madiface USB 128 interface connected to a DirectOut M.1k2 MADI router and to a combination of MADI and analog ADAM I/O. Rousseau says the audio quality through the intercom is extremely good and the Unity overall has performed reliably, especially in the crowded Wi-Fi and cellular environments at the various venues.
The quality is amazing, and the latency is very low, he says. We have this configured to connect to a similar system at our ESPN Brazil facility in S o Paulo to supplement the RVON I/O. We are also using it for comms and IFB as well as between remote talent and producers.
Rousseau indicates that the platform is under consideration to be deployed as a backup for comms for ESPN's Monday Night Football franchise this season, as well as for the US Open tennis tournament.
Audivero owner Chuck Downs says that a newer iteration of the app, Unity Connect, allows up to 64 64 audio streams across the internet with low latency and broadcast-quality sound. Unity Connect also serves as a bridge between other audio protocols. It can, for instance, take audio from a Dante system and send it across a local network or across the internet to a MADI system.
But the long-term implication for the Unity platform will be its ability to deliver broadcast-quality audio over conventional Wi-Fi and cellular networks. That, he says, will significantly reduce operational costs for broadcasters.
ESPN has its entire intercom system running on the network of a local internet provider, he points out. That's pretty amazing, even if it wasn't the Olympics.
Clear-Com's Bob Boster expects increased demand for IP-based intercom platforms that collapse the distances between geographic locations.
IP Meets 4K
Clear-Com President Bob Boster says the industry is seeing more requirements for IP-based intercom platforms that collapse the distances between geographic locations; that, as he expresses it, move audio transparently from a venue to an IBC and across an ocean back to broadcasters as easily as it moves audio across the venue, a trend he expects to see more of at the Olympics.
Clear-Com's intercom and audio-connectivity products are present in Rio and used by a number of broadcasters in a variety of applications, including at the IBC, where the majority of broadcasters will be using a Clear-Com system, and by Brazil's TV Globo, integrated into its first 4K production truck. In addition, NBC Sports has made an investment in Clear-Com's LQ series interfaces, which connect two-wire and four-wire audio and call-signaling over IP networks. These, Boster says, are being used to connect to the RTS wired intercom systems the network uses.
Linear Acoustic's Larry Schindel: At some point
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Broadcast audio at the 2016 Rio Olympics demonstrates the rapid uptake of IP-based audio transport in the industry. Much of that is taking place out of sight, in the domain of intercoms and other back-channel communications. But the efficiencies and cost-effectiveness of IP will be more broadly apparent in the near future. 
