Computation of LSP parameters from reflection coefficients

An algorithm for computing LSP (line spectrum pair) parameters directly from reflection coefficients is introduced. The algorithm uses a recursive technique to generate the line spectrum. In each step of recursion, scaling and rotation on the complex frequency plane are required. The even and odd line spectral frequencies are found to be the zero crosspoints on the real and imaginary axis, respectively. The algorithm can be implemented using fixed-point arithmetic with low complexity.