iirlp2mb This function does IIR Low Pass Filter to Multiband Filter Transformation. [Num, Den, AllpassNum, AllpassDen] = iirlp2mb(B, A, Wo, Wt) [Num, Den, AllpassNum, AllpassDen] = iirlp2mb(B, A, Wo, Wt, Pass) B: real or complex value A: real or complex value Wo: scalar or vector Wt: scalar or vector, elements must be monotonically increasing and >= 0 and <= 1. This is an Octave function. This function does IIR Low Pass Filter to Multiband Filter Transformation. The first two parameters give the numerator and denominator of the prototype low pass filter. The third parameter is the normalized angular frequency/pi to be transformed. The fourth parameter is the normalized angular frequency/pi target vector. The first two output variables are the numerator and denominator of the transformed filter. The third and fourth output variables are the numerator and denominator of the allpass transform. The fifth parameter can have values pass or stop, default value is pass.