Method and apparatus for normalized audio playback of media with and without embedded loudness metadata of new media devices
US9576585B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2015 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Jul 28, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A decoder device for decoding a bitstream so as to produce therefrom an audio output signal, the bitstream having audio data and optionally loudness metadata containing a reference loudness value, wherein a gain control device has a reference loudness decoder configured to create a loudness value, wherein the loudness value is the reference loudness value in case that the reference loudness value is present in the bitstream; wherein the gain control device has a gain calculator configured to calculate a gain value based on the loudness value and based on a volume control value, which is provided by an external user interface allowing a user to control the volume control value, and a loudness processor configured to control the loudness of the audio output signal based on the gain value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.