Commentary revolution: DAZN's technical production manager Max Mosgraber talks doing more with less By Kevin Emmott
Monday, April 29, 2024 - 11:24
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DAZN commentators Max Siebald [left] and Michael Ballack
Doing more with less is a common trope in broadcast circles, but the needle does not have to move far to make it worthwhile. The smallest things can make the biggest differences says DAZN's technical production manager, Max Mosgraber.
Sports commentators don't just describe what's happening on the field. The best commentators engage and involve the viewer in the action. They have opinions, they chat, and above all they provide companionship to people listening at home.
Mosgraber already knows all this. With over 10 years of experience in the broadcast industry, he's worked as a freelance sound engineer and technician for various OB companies in Germany, including TVN, Studio Berlin, NEP, TV Skyline, and HD Broadcast, and has spent time as a media engineer at public broadcaster RBB. So when he saw an opportunity to repurpose existing technologies to improve DAZN's commentary output he leapt on the opportunity.
Teaming up with select industry partners, he boosted DAZN's commentary output with additional audio channels, improved quality, added a video feed of the commentary area, and provided a fully redundant mix on an entirely separate backhaul.
He used the same technologies to minimise latency, give audio operators full control over the signal, and provide the commentary team with better information to do their jobs and he did it with no outside broadcast equipment and no additional transmission lines.
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Trialling his workflow at the recent UEFA fixture between Real Madrid and RB Leipzig at the Santiago Bernab u Stadium, he did big remote production on a micro scale. But Mosgraber's description of what he did is way better: We condensed the OB van into hand luggage.
When we attend games in foreign countries we have three commentary options, says Mosgraber. At the biggest events like the Bundesliga and UEFA Champions League matches in Germany, we will always send an OB van. For foreign Champions League matches, as a main visiting broadcaster, we may come equipped with our own OB, or more likely we book a full or partially equipped space in the commentary area.
Like many broadcasters, DAZN adds live commentary from its onsite team to the world feed of the game, supplied on this occasion by Spanish UEFA rights holder Telefonica. In Madrid, Mosgraber secured a partially equipped commentary booth, which as usual included a fibre connection to a 100MBps internet line and two monitors which showed the live match feed to help keep the commentators across the action. Mosgraber felt that even with this limited connectivity, he could do better.
DAZN's commentary booth at the recent UEFA fixture between Real Madrid and RB Leipzig at the Santiago Bernab u Stadium
Doing more with less
Pairing a Prodys Quantum W commentary unit at the stadium with a Quantum AV at DAZN's production control room (PCR) in Munich, he was not only able to introduce a second commentator track, but a live PTZ camera feed of the commentary area. Providing up to three mic/line inputs, the Quantum W can embed up to four audio tracks onto a camera feed. Mosgraber only needed two, and he used it to embed isolated commentator audio channels on the camera video output down the Movistar ethernet link to the DAZN PCR in Germany where it was de-embedded via a Quantum AV unit. Embedding the audio kept everything in sync, and both channels were able to be routed directly into DAZN's Stagetec mixer for monitoring and mixing into the world feed presentation.
The biggest benefit for us is being able to deliver a better mix to the gallery, and all without an SNG, OB van or additional dedicated fibre/satellite transmission lines. I think I am the only person in the world working like this, but this workflow was enabled by its simplicity
To use as much of the available bandwidth as possible, Mosgraber used the BitRate Adaptive Video Encoding (Brave) protocol, which provides network analysis for things like packet loss, packet latency and average bandwidth, and makes bitrate adjustments in real time. Crucially, Brave also gives priority to audio information over video.
The system effectively creates a small television studio that fits into my travel bag, says Mosgraber. We are the first company at the Champions League in Europe - or maybe in the world - that is using a commentary camera at these big football games without needing an OB van on site. It allows us to integrate the commentaries on a transmission line via the internet and because the commentaries are embedded onto the commentary camera it means the camera is an integrated part of the setup.
On a normal partially equipped remote production the commentary area isn't able to send or receive vision tracks to or from the PCR, but this workflow means that as well as sending the commentaries and commentator camera feed, we can also get the program feed from the gallery via RX.
It means the commentators can see all the inserts and graphics, the commercials, the EVS highlight tracks; they can see everything as opposed to just the match feed. It's a huge benefit to the commentary team because they feel more connected to the production and from a teamwork perspective it's a much more joined up approach.
Full redundancy
As a as a main visiting broadcaster, the European Broadcasting Union (EBU) requires DAZN to produce a clean commentary track on audio track four of its transmission line, and Mosgraber took the opportunity to implement a secondary system to ensure that it not only sounds better than before, but provides a solid redundant backup should the internet f
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Commentary revolution: DAZN's technical production manager Max Mosgraber talks doing more with less By Kevin Emmott 
