Digital filter having a fir filter and a warped fir filter, and a listening device including such a digital filter
US7885991B2 · kind B2 · utility
2Cited by
2References
6Claims
0Family size
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Key dates
| Filing date | Mar 3, 2004 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Jul 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital filter includes at least a first and a second delayed summation line. One of the delay lines includes a warped finite impulse response (FIR) filter and the other line is a FIR filter. Midpoint elements from the first delayed summation line are used as input to the second delayed summation line. Output from the first delayed summation line is delayed with a delay corresponding to the total delay of the second delayed summation line and the delayed output from the first delayed summation line is added to output from the second delayed summation line to faun a new output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.