Cube-Tec provides flexible MXF based Loudness Correction
Jun 11, 2012
Cube-Tec is able to use its long lasting experience in the broadcast
sector to supply flexible and efficient solutions for calculation and
file-based correction of loudness.
Loudness calculation and correction has become a top priority with media service providers worldwide. Most broadcasters in Europe voluntarily agreed to adopt loudness correction based on EBU R 128 (ITU-R BS.1770-2) within the next months.
Cube-Tec International is able to use its long lasting experience in the broadcast sector to supply flexible and efficient solutions for calculation and file-based correction of loudness.
In addition to standard compliance the processing speed for the loudness correction of the MXF-files is of particular importance. Systems are needed which correct the audio signals without touching any video information. Cube-Tec International provides different implementations specialized for different workflow needs.
For loudness correction during playout or broadcast, multiple workflows are possible. Swapping out audio information inside the MXF file using corrected audio data is one such possibility. A second option is to capture loudness correction parameters as metadata, which then controls in real-time levelling during playout.
Loudness validation and loudness normalization of delivered MXF files gets more and more importance. For quality assurance during file exchange between organisations, the Cube-Tec system analyses MXF file parameters, calculates loudness parameters and produces a fresh MXF file, fully and in every parameter compliant to the in-house standards. In the whole re-wrapping process the video stream stays completely untouched. This method not only corrects loudness in a single pass, but also makes sure that all ingested files are in a format where every parameter is defined fully and correctly. In this way, problems based on file incompatibility can be minimised and readability of archived files in the future can be ensured.
Cube-Tec's MXF Loudness Assimilator can be integrated into existing production environments via a webservice interface, but is also usable as a (FIMS compliant) service in a BPMN 2.0 based workflow management system for automated controlling of complex media workflows.