Title :
Improving the adaptive codebook delay selection for FS-1016 CELP
Author :
Andrews, Walter D. ; Teague, Keith A.
Author_Institution :
Dept. of Defense, Fort Meade, MD, USA
Abstract :
A limitation of the US federal standard 1016 CELP is the occurrence of adaptive delay estimation errors, particularly in the voiced/unvoiced transition areas. Delayed decision is applied in the analysis by synthesis loop of the analyzer to improve the selection of the adaptive delay, and the corresponding gain, by minimizing the weighted error criterion over the entire analysis frame instead of over the subframe. Full interoperability with the FS-1016 CELP standard is maintained
Keywords :
coding errors; delay estimation; linear predictive coding; speech coding; telecommunication standards; FS-1016 CELP; US federal standard 1016 CELP; adaptive codebook delay selection; adaptive delay estimation errors; code excited linear prediction; delayed decision coding; synthesis loop; voiced/unvoiced transition areas; weighted error criterion minimisation; Code standards; Delay estimation; Matched filters; Minimization; Signal synthesis; Speech analysis; Speech coding; Speech synthesis; Stochastic processes; Synthesizers;
Conference_Titel :
Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on
Conference_Location :
Lansing, MI
Print_ISBN :
0-7803-6475-9
DOI :
10.1109/MWSCAS.2000.952824
