M. Markovic et al., ROBUST LPC PARAMETER-ESTIMATION IN STANDARD CELP 4800 BIT S SPEECH CODER/, IEE proceedings. Vision, image and signal processing, 145(1), 1998, pp. 19-22
In order to decrease LPC spectral degradation in the USA FED STD 1016
4.8kbit/s CELP speech coder, application of a robust LPC parameter est
imation is proposed. Robust LPC methods, based on Huber's M-estimation
theory and a heuristic sample-selective two-stage robust procedure: a
re considered. Comparative experimental analysis is carried out based
on the cepstral distance, as an objective spectral measure. Presented
experimental analyses justify the use of the robust LPC methods in the
standard CELP 4800 bit/s speech coder, showing that the best results
are obtained by using the combined sample-selective robust LPC procedu
re.