Digital signal processing device

Details Digital signal processing device Digital signal processing device

1984-03-20

1986-04-01

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, H03M 166

Patent

active

045801282

ABSTRACT:
A digital signal processing device is disclosed. At an intermediate time point between respective sample data of a digital signal input is interpolated data expressed by the formula ##EQU1## wherein R.sub.l, m and n are positive integers. The digital signal interpolated with this interpolation data d is applied to a digital-to-analog converter where it is converted to an analog signal. This interpolation serves as a low-pass filter for removing unnecessary harmonic components, with the result that a analog filter used in a posterior stage after the digital-to-analog converter requires no steep characteristics and hence can be of a remarkedly simple structure and be manufactured at reduced cost.

REFERENCES:
patent: 3906218 (1975-09-01), Nussbaumer
patent: 4446529 (1984-05-01), Strolle

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