Time multiplexed n-ordered digital filter

Details Time multiplexed n-ordered digital filter Time multiplexed n-ordered digital filter

1981-12-22

1983-08-09

Malzahn, David H.

Boots, shoes, and leggings

179 1SA, 179 1SM, G06F 1531

Patent

active

043982620

ABSTRACT:
An n-ordered digital filter is disclosed in the form of a Partial Autocorrelation (PARCOR) lattice structure having two multipliers and two adders. Time multiplexing eliminates the use of individual multipliers and adders for each order of the filter. Speech synthesis of a time varying digital input signal is provided by performing n stages of Linear Predictive Coding (LPC) difference equation operation, where n is an integer. Delay means and storage registers minimize the control circuitry and circuit die size to calculate the difference equations to an nth order.

REFERENCES:
patent: 3662115 (1972-05-01), Salto et al.
patent: 4209844 (1980-06-01), Brantingham et al.
patent: 4340781 (1982-07-01), Ichikawa et al.
patent: 4344148 (1982-08-01), Brantingham et al.
patent: 4352162 (1982-09-01), Nyuji et al.

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