Circuitry for and a method of detecting tonal signals with the processing capacity distributed with weight to frequency and time domains
US6826496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2001 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | May 26, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Circuitry for detecting tonal signals, each of which has a particular nature in the frequency or time domain, while distinguishing them from each other. A rough frequency analyzer roughly analyzes an input signal in an entire frequency band with lower accuracy in the frequency or time domain, thereby roughly distinguishing the tonal signals. Detectors, each of which is associated with a subband occupied by a particular target tonal signal, detect the attribute of the power variation of the target tonal signal with respect to time with higher accuracy in the direction of the frequency or time domain to thereby finely identify the target tonal signal. A controller selectively enables and disables the detectors in accordance with the results from the detectors. One of the detectors is enabled which is selected under the control of the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.