Patent ID: 9559651
Date: 2017-01-31
CPC Classifications: G10L,H03G

Claim:
1. A method for decoding audio during playback processing, comprising: receiving an encoded audio signal; receiving metadata associated with the encoded audio signal, the metadata including a plurality of dynamic range control (DRC) gain values and an index of a previously selected DRC characteristic in accordance with which the DRC gain values were computed when the encoded audio signal was being generated; decoding the encoded audio signal to produce a decoded audio signal; selecting a current DRC characteristic from amongst a plurality of available DRC characteristics, wherein the selected current DRC characteristic is associated with the index; producing modified DRC gain values by i) applying the plurality of DRC gain values from the metadata to the current DRC characteristic to obtain a plurality of input levels, ii) selecting a target DRC characteristic from amongst the plurality of available DRC characteristics, and iii) applying the plurality of input levels obtained in i) to the target DRC characteristic; and applying the modified DRC gain values to the decoded audio signal to produce a DRC adjusted audio signal during playback processing.