公开(公告)号：US20180115292A1

公开(公告)日：2018-04-26

申请号：US15788443

申请日：2017-10-19

Applicant: DOLBY INTERNATIONAL AB

Inventor： Nicholas Luke Appleton ,  Christopher Mark Tubb ,  William Thomas Rowley ,  Imankalyan Mukherjee

IPC: H03G11/04 ,  H03G3/20

CPC classification number: H03G11/04 ,  H03G3/20 ,  H03G7/002 ,  H03G7/007 ,  H03G11/008

Abstract: An audio peak limiter apparatus which calculates a smoothed sequence of gains for application to a sequence of blocks of samples of an audio signal. The apparatus sometimes calculates a candidate gain, to replace a too-large smoothed gain, such that applying the candidate gain would produce no scaled sample whose magnitude exceeds a predetermined limit. The apparatus sometimes calculates and stores a final gain to replace the too-large smoothed gain (where the final gain can be obtained e.g. by dividing the to-be-replaced smoothed gain by a prior smoothed gain and multiplying the result by the corresponding prior final gain), if it is determined that the candidate gain is not less than the immediately previous final gain.