Digital signal processor integrally incorporating a coefficient

Details Digital signal processor integrally incorporating a coefficient Digital signal processor integrally incorporating a coefficient

1996-11-20

1998-04-28

Lall, Parshotam S.

395800, 84605, 84659, 84662, G10H 112, G06F 900

Patent

active

057457433

ABSTRACT:
A digital signal processing for, e.g., tone synthesis or tone control is performed by reading a microprogram from a microprogram memory and executing a digital signal processing algorithm according to this microprogram using necessary coefficients. A first coefficient to be used in this digital signal processing is supplied by a coefficient supply section but this first coefficient is not used directly for execution of the algorithm. A second coefficient which is actually used is generated as a result of a predetermined interpolation operation by a coefficient interpolation section using the first coefficient as a target value. The second coefficient which is used for execution of the algorithm, therefore, changes timewise toward the first coefficient. This coefficient interpolation section is provided independently from the microprogram. Accordingly, the coefficient can be timewise changed and a timewise changing digital signal processing can thereby be realized without imposing undue burden on an external processor or the internal microprogram.

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