Method and apparatus for a finite impulse response filter processor
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United States of America Patent
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Oct 15, 1996
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app pub date -
Aug 15, 1995
filing date -
Aug 15, 1995
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Abstract
A method and apparatus for performing finite impulse response filtering in real time is accomplished by taking advantage of symmetrical FIR coefficients of FIR filters in audio equipment. Due to the symmetry of the coefficients, each coefficient, other than the T0 coefficient, has an almost identical counterpart. Thus, only one of the identical coefficient needs to be stored and is used in conjunction with two data points. The two data points are summed together prior to multiplication by the corresponding coefficient to produce an accumulated resultant. This process repeats for each pair of data points, and corresponding FIR coefficient, until a final resultant is obtained.
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