scope:

This Recommendation specifies an advanced sound system with and without accompanying picture. An advanced sound system is a system with a reproduction configuration beyond those specified in Recommendation ITU-R BS.775 or a system with any reproduction configuration that can support channel-based, object-based or scene-based input signals or their combination with metadata. An advanced sound system uses audio data in combination with an appropriate set of metadata to specify a sound scene to be delivered/broadcasted. The specifications include requirements for signalling the properties of advanced sound content and loudspeaker layout to be used in content production for advanced sound systems. The advanced sound system can apply to the sound component of television and expanded large screen digital imagery (LSDI) programmes, as well as for sound only programmes