Dynamic gain control of audio in a communication device
US7242784B2 · kind B2 · utility
33Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2001 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Mar 26, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/301
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for dynamically controlling audio signal gain in a communication device starts with determining a level of an input audio signal. The level is then mapped against a table of predetermined corresponding gain targets to determine an appropriate gain target for that level. The gain targets are then applied to the audio signal, which is then output. The invention is particularly suited to speakerphone operation in a communication device, wherein the gain targets provide compression, expansion or limiting so that distant speakers can be heard clearly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.