System and method for generating an audio gain control signal
US8275153B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2008 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Jun 3, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Embodiments of a system and method of controlling the loudness of an audio signal are disclosed. The method includes determining a long term loudness level for the audio signal over a first sliding time period, determining a short term loudness level for the audio signal over a second sliding time period where the second sliding time period is shorter than the first sliding time period, detecting a segment transition in the audio signal; and generating a gain control signal. The gain control signal is based on the short term loudness level for a first time interval after a segment transition and the gain control signal is based on the long term loudness level after the expiration of the first time interval. Other embodiments include addition signal analysis steps to identify different segments of a signal and to control the loudness of the segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.