In order to reduce the number of update operations for determining LPC (viz., reflection) data from an incoming sampled data, a plurality of matrices representative of autocorrelation functions are set in memory. Subsequently, data representative of the upper triangular portions of the matrices (virtual...http://www.google.com/patents/US5475790?utm_source=gb-gplus-sharePatent US5475790 - Method and arrangement of determining coefficients for linear predictive coding
