US 5,636,153 A · Digital signal processing circuit

Abstract

A digital signal processing circuit, which is configured by a digital signal processor (i.e., DSP), includes at least a data memory, a coefficient memory, a calculation portion and an interpolation portion. The data memory stores a plurality of digital data which are sequentially supplied thereto, while the coefficient memory stores a plurality of coefficients in connection with the plurality of digital data. The calculation portion performs a specific calculation (e.g., multiplication), using the coefficient, on the digital data. When a new coefficient is given with respect to one of the coefficients designated, the interpolation portion performs interpolation processing on the designated coefficient so as to successively shift it to the new coefficient. The coefficient successively shifted is stored in the coefficient memory. Hence, the calculation portion performs the calculation, using the coefficient successively shifted, on the digital data.

Claims20

Dependent claims

A digital signal processing device comprising:

a first memory for storing operational coefficients and selectively storing new coefficients supplied thereto from an external device;
a second memory for storing digital data;
operation means for selectively performing:
an interpolation operation by which the values of said operational coefficients stored in said first memory are progressively changed so as to approach the values of said new coefficients, and
an arithmetic operation on said digital data stored in said second memory utilizing said operational coefficients stored in said first memory;
and
control means for generating at least one control signal to cause said operation means to perform one of said interpolation operation and said arithmetic operation.

4 more elements

Dependencies are inferred from the claim text.

Digital signal processing circuit

Life of this patent

Digital signal processing circuit

Life of this patent

Abstract

Claims20