shelving_lp_imp.m

声音过滤器工具大集合.

function y = shelving_LP_imp(x, b, a, mu)
%SHELVING_LP_IMP - Implements First-Order IIR Butterworth Shelving Filter 
%                  by summing the input vector with the output of a
%                  first-order IIR Butterworth low-pass filter, scaled
%                  by mu-1.
%
%     usage:  y = shelving_LP_imp(x, b, a, mu)
%     
%           x = input vector
%           y = output vector
%           b = Two column vector, numerator coefficients
%           a = Two column vector, denominator coefficients
%          mu = Scalar, low-pass output scaling factor
%
%     See also shelving_LP.m 

%   References:
%      [1]  John Lane, Jayant Datta, Brent Karley, Jay Norwood, "DSP Filters", 
%           PROMPT Publications(an imprint of Sams Technical Publishing), 
%           Indianapolis, IN, 2001, page 115.
%           Book's website: www.dspaudiocookbook.com

%  Copyright (c) 2005 Bo餫