Asynchronous sample rate converter
US8405532B1 · kind B1 · utility
15Cited by
1References
22Claims
0Family size
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Key dates
| Filing date | May 28, 2010 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Apr 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Systems and methods for asynchronous sample rate conversion are provided that allow time-varying arbitrary sample ratios. An uncorrected ratio between two arbitrary sample rates is corrected and subsequently used to perform an efficient sample rate conversion on the samples in a data stream. Coefficients of a (polyphase) finite impulse response filter are interpolated based on a current time register value. Additional computational efficiency (and a smaller finite impulse response filter) may be used due to oversampling the input signal to the finite impulse response filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.