The European Broadcasting Union (EBU) has published a new document to help HDR manufacturers and users to display HLG signals in a more consistent way.
EBU R 167 provides a number of ‘Predefined Monitor Modes’ that make it much easier to get different monitors to align, said the EBU.
The publication includes a set of predefined modes, clearly indicating the relevant peak level, reference white level, and system gamma, as well as a visualisation of the different modes in a single, instructive image.
It also offers a clear explanation of what gamma adjustment to use in non-reference viewing environments.
The Recommendation also offers help with the issue of how to handle ‘extended range’ video signal levels, stating that it is possible to use video values up to a maximum of 109 per cent. Until now, most monitors have not been showing these ‘extended range’ values, because they were unable to reach the 1000 cd/m2 level for a 100 per cent signal (and the corresponding 109 per cent level would be at 1811 cd/m2), said the EBU.
