SYSTEM AND METHOD FOR DYNAMIC RANGE CONTROL OF AN AUDIO SIGNAL

Abstract

On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (α) from the bitstream, where 1 ≤ m < n. Also derived from the bitstream are pre-processing dynamic range control, DRC, parameters (DRC2) quantifying an encoder-side dynamic range limiting of the core signal. The n-channel audio signal is obtained by parametric synthesis in accordance with the multichannel coding parameters and while cancelling any encoder-side dynamic range limiting based on the pre-processing DRC parameters. In particular embodiments, the reconstruction further includes use of compensated post-processing DRC parameters quantifying a potential decoder-side dynamic range compression. Cancellation of an encoder-side range limitation and range compression are preferably performed by different decoder-side components. Cancellation and compression may be coordinated by a DRC pre-processor.

Inventors

RIEDMILLER, JEFFREY
ROEDEN, KARL JONAS
KJOERLING, KRISTOFER
PURNHAGEN, HEIKO
MELKOTE, VINAY
SEHLSTROM, LEIF

Assignees

Dolby Laboratories Licensing Corporation
Dolby International AB

Dates

Publication Date: 20260506
Application Date: 20130502