FIXED CONSULTATION TABLE SEARCH APPARATUS AND FIXED CONSULTATION TABLE SEARCH METHOD. The present invention relates to a fixed look-up table search apparatus that slightly suppresses an increase in the amount of operation even if the filter applied to the pacing pulse is endowed with a feature that cannot be represented by a triangular matrix. lower and performs an almost optimal fixed lookup table lookup. This fixed lookup table lookup apparatus is provided with an algebraic lookup table (101) which generates a pulse pacing vector; a convolution operation section (151) that converts an impulse response from an auditory heavy synthesis filter to an impulse response vector that is provided with a negative time value to generate a second impulse response vector that is endowed with a value in negative second times; a matrix generation section (152) which generates a Toeplitz convolution matrix by means of a second impulse response vector; and a convolution operation section (153) that convolves the matrix generated by matrix generation section (152) to the pulse stimulation vector generated by the algebraic lookup table (101).
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