Patent · US Active

System and method for non-destructively normalizing loudness of audio signals within portable devices

US9646622B2 · kind B2 · utility

4Cited by

2References

9Claims

0Family size

Assignees

Dolby Laboratories Licensing Corporation · US
Dolby International AB · IE

Inventors

Jeffrey Riedmiller · Penngrove, US
Harald Mundt · Fürth, DE
Michael Schug · Erlangen, DE
Martin Wolters · Wuppertal, DE

Key dates

Filing date	Oct 28, 2014
Grant date	May 9, 2017
Priority date	—
Expiry date	Apr 30, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH03G7/007
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Many portable playback devices cannot decode and playback encoded audio content having wide bandwidth and wide dynamic range with consistent loudness and intelligibility unless the encoded audio content has been prepared specially for these devices. This problem can be overcome by including with the encoded content some metadata that specifies a suitable dynamic range compression profile by either absolute values or differential values relative to another known compression profile. A playback device may also adaptively apply gain and limiting to the playback audio. Implementations in encoders, in transcoders and in decoders are disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.