Audio processing circuit and method
US7714750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2006 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Mar 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0621
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An audio processing circuit includes a clock synthesizer, a clock divider, a digital interpolator module, a sampling rate converter and a digital-to-analog converter. The clock synthesizer generates a base clock signal according to a sampling clock signal and a first reference clock signal. The clock divider generates a multiple frequency clock signal according to the base clock signal. The digital interpolator module interpolates a digital audio data according to the multiple frequency clock signal. The sampling rate converter processes the interpolated digital audio data into a re-sampled digital audio data according to the multiple frequency clock signal and a second reference clock signal. The digital-to-analog converter is coupled to the sampling rate converter for converting the re-sampled digital audio data into an analog audio signal according to the second reference clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.