CPC E21B 33/138 (2013.01) [E21B 21/003 (2013.01); E21B 41/00 (2013.01); G10L 19/008 (2013.01); G10L 19/167 (2013.01); G10L 19/18 (2013.01); G10L 19/24 (2013.01)] | 3 Claims |
1. A method, performed by an audio signal processing device, for adjusting a dynamic range of an audio signal, the method comprising:
receiving a bitstream comprising an encoded audio signal and encoder-generated dynamic range control (DRC) metadata, wherein the encoder-generated DRC metadata comprises a plurality of DRC gain sets, the plurality of DRC gain sets comprising a first set of DRC gains representing a first portion of a total DRC gain to be applied to the audio signal to adjust the dynamic range of the audio signal, and a second set of DRC gains representing a second portion of the total DRC gain to be applied to the audio signal to adjust the dynamic range of the audio signal;
decoding the encoded audio signal to obtain the audio signal;
downmixing the audio signal; and
adjusting the dynamic range of the audio signal by applying the first set of DRC gains to the audio signal before downmixing, and the second set of DRC gains to the audio signal after downmixing, to apply the total DRC gain to be applied to the audio signal.
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