Patent ID: 9607624
Date: 2017-03-28
CPC Classifications: G10L,H03G

Claim:
1. A method for applying Dynamic Range Control (DRC) gain values to a piece of sound program content, comprising: gathering, by an electronic audio playback device, multi-band DRC configuration information, wherein the multi-band DRC configuration information indicates the number of independent DRC gain sequences in a bitstream and the number of DRC channel groups in the bitstream for an entire audio band or for multiple sub-bands; parsing the bitstream to retrieve quantized data values representing DRC gain values for each DRC gain frame; decoding the quantized data values using code tables to generate DRC gain data that has undergone encoding to reduce bit rate of the bitstream; decoding the DRC gain data to undo said encoding, so as to generate DRC gain values to be applied to corresponding audio frames of the piece of sound program content, wherein decoding the DRC gain data comprises applying the DRC gain values to the entire audio band or multiple sub-bands of each audio frame.