ISCA Archive - An algorithm for computing LSP frequencies directly from the reflection coefficients (original) (raw)

An algorithm for computing LSP frequencies directly from the reflection coefficients

C. F. Chan, K. W. Law

An algorithm for computing the LSP frequencies will be given in this paper. The algorithm employs a recursive technique to generate the line spectrum from the reflection coefficients. In each step of a recursion, a scaling and rotation on the complex frequency plane are required. The even and odd line spectral frequencies are found to be the zero cross-points on the real and imaginary axis respectively. The algorithm does not require to calculate the LPC coefficients and it can be implemented using fixed-point arithmetic with low complexity.