Programmed time-changing coefficient digital filter

Details Programmed time-changing coefficient digital filter Programmed time-changing coefficient digital filter

1986-03-26

1989-05-09

Witkowski, Stanley J.

Boots, shoes, and leggings

84 119, 84DIG9, 381 51, G06F 738, G10H 112

Patent

active

048294632

ABSTRACT:
A time-changing coefficient digital filter having a data RAM for storing input data, a purality of N data registers at the output of the data RAM forming a delay element, a coefficient RAM storing coefficient values, coefficient registers temporarily storing respective coefficients, and a multiplier for multiplying data read out of data registers and coefficient registers respectively. Data from the multiplier and inputs is accumulated in an adder. Coefficient registers and data registers are updated by data from the data RAM and coefficient RAM. The coefficient digital filter provides a sum of products sequentially read out of the coefficient and data registers. The digital filter is applied to produce a musical instrumet having improved tonal qualities.

REFERENCES:
patent: 4433604 (1984-02-01), Ott
patent: 4554358 (1980-11-01), Wuchi et al.
patent: 4703447 (1987-10-01), Lake, Jr.

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