Apparatuses and methods to detect and obtain desired audio
US9406293B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2014 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Jul 14, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/05
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device and method to detect desired audio includes a ratio calculator. The ratio calculator calculates a ratio between a primary acoustic signal, and a reference acoustic signal. The primary acoustic signal contains desired audio and undesired audio and the reference acoustic signal contains mostly undesired audio, substantially void of undesired audio. A long-term mean value calculator is coupled to the ratio calculator. The long-term mean value calculator maintains an average of the ratio. A comparator is coupled to the ratio calculator and the long-term value calculator. The comparator compares the ratio with the average. Desired audio is detected when the ratio is greater than the average by a threshold amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.