Loudness adjustments for downmixed audio content

摘要

PROBLEM TO BE SOLVED: To provide loudness adjustment for downmixed audio content. Audio content encoded for a reference speaker configuration is downmixed to downmix audio content encoded for a particular speaker configuration. One or more gain adjustments are performed on the individual parts of the downmix audio content encoded for the particular speaker configuration. Loudness measurements are then performed on the individual parts of the downmix audio content. An audio signal containing the audio content encoded for the reference speaker configuration and downmix loudness metadata is generated. Downmix loudness metadata is generated, at least in part, based on said loudness measurements for said individual parts of said downmix audio content. [Selection diagram] Fig. 3