The application of sample-selective LPC method in standard CELP 4800 B/S speech coder

The application of the sample-selective LPC method in standard CELP coder, U.S.A. FED STD 1016 4.8 kb/s, in sense of decreasing LPC spectral degradation compared to the standard LPC, methods is considered in the paper. Comparative experimental analysis is done referred to the results of three different spectral measures related to the RMS LOG spectral measure: likelihood ratios, cosh measure and cepstral distance. Presented experimental analysis justify the use of the proposed sample-selective LPC method in standard CELP speech coder.