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Robust LPC parameter estimation in standard CELP 4800 bit/s speech coder
Robust LPC parameter estimation in standard CELP 4800 bit/s speech coder
Autori:
Časopis: IEE Proceedings - Vision
Volume, no: 145 , 1
ISSN: 1350-245X
Stranice: 19-22
Link: http://digital-library.theiet.org/content/journals/10.1049/ip-vis_19981633
Apstrakt:
In order to decrease LPC spectral degradation in the USA FED STD 1016 4.8 kbit/s CELP speech coder, application of a robust LPC parameter estimation is proposed. Robust LPC methods, based on Huber's M-estimation theory and a heuristic sample-selective two-stage robust procedure, are 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 procedure.
Ključne reči: Vocoders, code standards, cepstral analysis, linear predictive coding, telecommunication standards, parameter estimationn
Kategorije objave:
Bibliografske reference nastavnika Univerziteta Singidunum
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