function?c=melcepst（sfs）
%MELCEPST?Calculate?the?mel?cepstrum?of?a?signal?C=（SFSWNCPNINCFLFH）
%
%
%?Simple?use:?c=melcepst（sfs）	%?calculate?mel?cepstrum?with?12?coefs?256?sample?frames
%				??c=melcepst（sfs‘e0dD‘）?%?include?log?energy?0th?cepstral?coef?delta?and?delta-delta?coefs
%
%?Inputs:
%?????s	?speech?signal
%?????fs??sample?rate?in?Hz?（default?11025）
%?????nc??number?of?cepstral?coefficients?excluding?0‘th?coefficient?（default?12）
%?????n???length?of?frame?（default?power?of?2?<30?ms））
%?????p???number?of?filters?in?filterbank?（default?floor（3*log（fs））?）
%?????inc?frame?increment?（default?n/2）
%?????fl??low?end?of?the?lowest?filter?as?a?fraction?of?fs?（default?=?0）
%?????fh??high?end?of?highest?filter?as?a?fraction?of?fs?（default?=?0.5）
%
%		w???any?sensible?combination?of?the?following:
%
%				‘R‘??rectangular?window?in?time?domain
%				‘N‘	Hanning?window?in?time?domain
%				‘M‘	Hamming?window?in?time?domain?（default）
%
%		??????‘t‘??triangular?shaped?filters?in?mel?domain?（default）
%		??????‘n‘??hanning?shaped?filters?in?mel?domain
%		??????‘m‘??hamming?shaped?filters?in?mel?domain
%
%				‘p‘	filters?act?in?the?power?domain
%				‘a(chǎn)‘	filters?act?in?the?absolut