Low-latency audio output with variable group delay
US11438697B2 · kind B2 · utility
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16References
16Claims
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Key dates
| Filing date | Dec 6, 2019 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Jun 9, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/742
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system may include a digital delta-sigma modulator configured to receive a digital audio input signal and quantize the digital audio input signal into a quantized signal, a filter configured to receive the quantized signal and perform filtering on the quantized signal to generate a filtered quantized signal, the filter having a variable group delay, and a current-mode digital-to-analog converter configured to receive the filtered quantized signal and convert the filtered quantized signal into an equivalent current-mode analog audio signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.