IRT (Institut für Rundfunktechnik) publishes the technical guidelines and specifications of Germany’s public broadcasters. There are six MXF Profiles for HD program material as specified by ARD, ZDF, ORF and ARTE. There are presets in Adobe Media Encoder that correspond to each of these profiles.
The IRT compliance in Media Encoder CC ensures that your content conforms with German broadcast standards. The only way to get an output from Media Encoder CC that is IRT-compliant is to use one of the six presets.