Patent ID: 7773007

Claim:
A signal processing method comprising the steps of: providing a plurality of fluency digital/analog (D/A) functions classified with parameters m with fluency D/A function generators; inputting a predetermined parameter m and discrete signal values which represents sampling values; selecting a fluency D/A function from the plurality of fluency D/A functions according to the predetermined parameter m with a selector of the fluency D/A function generators; and generating a continuous signal by performing convoluting integration between the selected fluency D/A function and the inputted discrete signal values with a convoluting integrator having delay circuits and performing an operation of: ∑ k = - ∞ k = ∞ ⁢ u ⁡ ( t k ) ⁢ [ DA ] m ⁢ ψ ⁡ ( t - t k ) ( 13 ) u(t k ): sampling value at sampling point t k , [DA] m ψ(t−t k ): fuluency D/A function of parameter m.