System for adjusting perceived loudness of audio signals
US8315398B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2008 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Nov 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/001
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of adjusting a loudness of an audio signal may include receiving an electronic audio signal and using one or more processors to process at least one channel of the audio signal to determine a loudness of a portion of the audio signal. This processing may include processing the channel with a plurality of approximation filters that can approximate a plurality of auditory filters that further approximate a human hearing system. In addition, the method may include computing at least one gain based at least in part on the determined loudness to cause a loudness of the audio signal to remain substantially constant for a period of time. Moreover, the method may include applying the gain to the electronic audio signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.