The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2019
Filed:
Dec. 17, 2018
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Dolby International Ab, Amsterdam Zuidoost, NL;
Jeffrey Riedmiller, Novato, CA (US);
Karl J. Roeden, Solna, SE;
Kristofer Kjoerling, Solna, SE;
Heiko Purnhagen, Sundbyberg, SE;
Vinay Melkote, Bangalore, IN;
Leif Sehlstrom, Jarfalla, SE;
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Dolby International AB, Amsterdam Zuidoost, NL;
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 (DRC) 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.