Boots – shoes – and leggings
Patent
1989-04-24
1992-02-18
Malzahn, David H.
Boots, shoes, and leggings
36472416, G06F 1531
Patent
active
050899813
ABSTRACT:
A hybrid form digital filter. A digital filter is provided wherein the zeros of its transfer function are provided by a direct form digital filter portion and the poles of the transfer function are provided by a normal form digital filter portion. The hybrid filter provides truncation noise and stability characteristics like those of a normal form digital filter, but its filter coefficients may be calculated more rapidly than those for a normal form digital filter having the same transfer function, thereby enabling the coefficients to be calculated in real time for tuning the filter. While the preferred embodiment is a second order hybrid digital filter, the same principles are applicable to higher order digital filters as well.
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Audio Precision, Inc.
Birdwell William A.
Malzahn David H.
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