Tone detector and method used in a robot for detecting a tone
US8155327B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Oct 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tone detection device for detecting whether an input signal having a tone. The device includes a volume gain calculation unit performing a volume gain treatment on frame data and outputting the volume-gain-treated frame data and energy in time domain thereof, a threshold calculation unit calculating a threshold value on the basis of the energy of the volume-gain-treated frame data, a filter transforming the volume-gain-treated frame data by an algorithm and outputting a characteristic value in a first period, and a comparator comparing the first characteristic value and the threshold value to generate a result and determining the frame data of the input signal has the tone on the basis of the result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.