Apparatus for noise reduction in audio signal processing
US11699423B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2022 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Mar 12, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus for noise reduction in audio signal processing includes a power amplifier, a zero-crossing detector, and a threshold detector. The power amplifier has an input signal terminal for receiving an audio input signal and an output signal terminal. The audio input signal is a digital-to-analog converted version according to a version of a digital audio signal. The power amplifier has an analog gain which is controllable in response to an analog gain control signal. The zero-crossing detector determines a zero-crossing detection signal according to an internal signal provided between the input signal terminal and the output signal terminal. The threshold detector determines a gain setting according to the digital audio signal and the zero-crossing detection signal to generate the analog gain control signal indicating the gain setting, wherein the threshold detector controls the analog gain of the power amplifier according to the analog gain control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.