Equivalent distortion measures forquantisation of LPC model
Jan S. Erkelens, PIET M. T. BROERSEN · Electronics Letters · 1995
The authors show that for small errors in an LPC model, spectral distortion and weighted squared distortion measures in the coefficients of arbitrary one-to-one transformations of the LPC parameters are equivalent. For line spectrum pairs and immitance spectrum pairs, the weighting matrix is diagonal, which is advantageous for efficient quantisation.