Loudness maximization with constrained loudspeaker excursion
US8855322B2 · kind B2 · utility
15Cited by
10References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2011 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Dec 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An original loudness level of an audio signal is maintained for a mobile device while maintaining sound quality as good as possible and protecting the loudspeaker used in the mobile device. The loudness of an audio (e.g., speech) signal may be maximized while controlling the excursion of the diaphragm of the loudspeaker (in a mobile device) to stay within the allowed range. In an implementation, the peak excursion is predicted (e.g., estimated) using the input signal and an excursion transfer function. The signal may then be modified to limit the excursion and to maximize loudness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.