Title :
Research on MPLPC Excited-Pulse Abstract Algorithm
Author :
Zhen, Ma ; Yanyan, Cao ; Jinlan, Zhang
Author_Institution :
Dept. of Comput. Sci. & Technol., Binzhou Univ., Binzhou, China
Abstract :
Large computational requirements and high coding-rate appear in primal MPLPC because multi-pulse information in residue signal waveform and glottis pulse´s instability have been omitted. To solve these problems, the method of waveform-aided excited-pulse search and number-variable MPLPC is proposed here. First, ascertain the threshold of center clipper used to reduce the search range; then the method of ascertaining the pulse numbers of every frame is discussed on basis of speech excitation´s instability. Here through Matlab emulation, nice synthetical speech quality is retained and coding rate can be reduced by 1 kb/s.
Keywords :
linear codes; speech coding; speech synthesis; Matlab emulation; excited-pulse abstract algorithm; glottis pulse instability; multipulse information; multipulse linear prediction coding; residue signal waveform; speech excitation instability; synthetical speech quality; waveform-aided excited-pulse search; Amplitude estimation; Linear predictive coding; Nonlinear equations; Parametric statistics; Signal synthesis; Speech coding; Speech enhancement; Speech processing; Speech synthesis; Vocoders; mutli-pulse excitation; speech coding; variable; waveform-aided;
Conference_Titel :
Computational Intelligence and Design, 2009. ISCID '09. Second International Symposium on
Conference_Location :
Changsha
Print_ISBN :
978-0-7695-3865-5
DOI :
10.1109/ISCID.2009.129
