imgRio de Janeiro, Brazil (August 5, 2014)—Lawo equipment was a key element to World Cup coverage by German national public broadcasters ARD and ZDF.

ARD and ZDF relayed live coverage from Brazil without an OB van on-site; instead, the entire studio delivered remote production to the main studio control room in the International Broadcast Center (IBC) 35 km away.

Signal transfer was managed by a Lawo V__link4 unit, which was used as an IP network stagebox. This enabled audio and video contribution over IP as part of the infrastructure for remote production. For World Cup coverage, all audio signals were collected by the V__link4 via MADI and transferred over the IP network via RAVENNA from Copacabana to the IBC and back.

In Remote Production, the return feed from moderators was a tricky task, since the delays in the network did not allow direct feedback from the mixing console. As a solution, Lawo developed a remote DSP processing unit in collaboration with engineers from ZDF and Südwestrundfunk (host broadcaster for the World Cup in Germany), which enabled presenters in the remote studio to monitor their own voice without an audio delay—just as if in the main studio.

In the main ARD/ZDF studio control room, sound was mixed with a Lawo mc290 console. Whenever a presenter was on air, the desk controlled the remote processing via IP network, so that the moderator listened directly to his or her own voice. Using modern touchscreen operation on a tablet, mic preamp settings and attenuation values for the IFB were switched in different situations, so that it was possible to produce two programs in parallel at the Copacabana.

The RAVENNA connection via V__link4 also transported all intercom channels for cameras and radio sets as well as for tallies.

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