Digital filter with dynamically variable filter characteristics

Details Digital filter with dynamically variable filter characteristics Digital filter with dynamically variable filter characteristics

1990-12-17

1992-10-20

Malzahn, David H.

Boots, shoes, and leggings

3647241, 84DIG9, G06F 1531

Patent

active

051576236

ABSTRACT:
Filter coefficients corresponding to a plurality of discrete cutoff frequencies are stored in advance in a memory and a filter coefficient corresponding to a specified cutoff frequency is generated by performing an interpolation referring to the filter coefficients stored in the memory, thereby saving the capacity of the memory. When a resonance index is to be specified in addition to the cutoff frequency, filter coefficients corresponding to two difference resonance indexes are acquired by the interpolation, then a new filter coefficient is acquired by executing the interpolation referring to these two filter coefficients.

REFERENCES:
patent: 4422156 (1983-12-01), Sano
patent: 4467440 (1984-08-01), Sano et al.
patent: 4489391 (1984-12-01), Morikawa
patent: 4738179 (1988-04-01), Hideo
patent: 4907484 (1990-03-01), Suzuki et al.

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