Digital volume control
US9875750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2016 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Jun 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/165
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital volume control may be implemented in a digital-to-analog controller (DAC) when an output rate of the DAC is higher than the input rate. The upsampling conversion process from the digital input to analog output may be controlled to adjust a volume of an output signal produced from the digital signals. The frames produced by the upsampling conversion process may include a fraction of scheduling blocks filled with the input data bit, where the fraction is based on a desired volume. The generated frames are provided to a finite impulse response (FIR) filter that produces an analog signal with a magnitude proportional to the determined fraction of scheduling blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.