function?[levaffsovad]=activlev（spfsmode）
%ACTIVLEV?Measure?active?speech?level?as?in?ITU-T?P.56?[LEVAFFSO]=（spFSMODE）
%
%Usage:?（1）?lev=activlev（sfs）;?????%?speech?level?in?units?of?power
%???????（2）?db=activlev（sfs‘d‘）;??%?speech?level?in?dB
%???????（3）?s=activlev（sfs‘n‘）;???%?normalize?active?level?to?0?dB
%
%Inputs:?sp?is?the?speech?signal?（with?better?than?20dB?SNR）
%????????FS?is?the?sample?frequency?in?Hz?（see?also?FSO?below）
%????????MODE?is?a?combination?of?the?following:
%????????????r?-?raw?omit?input?filters?（default?is?200?Hz?to?5.5?kHz）
%????????????0?-?no?high?pass?filter?（i.e.?include?DC）
%????????????4?-?high?pass?filter?at?40?Hz?（but?allows?mains?hum?to?pass）
%????????????1?-?use?cheybyshev?1?filter
%????????????2?-?use?chebyshev?2?filter?（default）
%????????????e?-?use?elliptic?filter
%????????????h?-?omit?low?pass?filter?at?5.5?kHz
%????????????d?-?give?outputs?in?dB?rather?than?power
%????????????n?-?output?a?normalized?speech?signal?as?the?first?argument
%????????????N?-?output?a?normalized?filtered?speech?signal?as?the?first?argument
%????????????l?-?give?both?active?and?long-term?power?levels
%????????????a?-?include?A-weighting?filter
%????????????i?-?include?ITU-R-BS.468/ITU-T-J.16?weighting?filter

%Outputs:
%????If?the?“n“?option?is?specified?a?speech?signal?normalized?to?0dB?will?be?given?as
%????the?first?output?followed?by?the?other?outputs.
%????????LEV?gives?the?speech?level?in?units?of?power?（or?dB?if?mode=‘d‘）
%????????????if?mode=‘l‘?is?specified?LEV?is?a?row?vector?with?the?“long?term
%????????????level“?as?its?second?element?（this?is?just?the?mean?power）
%????????AF??is?the?activity?factor?（or?duty?cycle）?in?the?range?0?to?1
%????????FSO?is?a?column?vector?of?intermediate?information?that?allows
%????????????you?to?process?a?speech?signal?in?chunks.?Thus:
%
%????????????fso=fs;?for?i=1:inc:nsamp?[levfso]=activlev（sp（i:i+inc-1）fsomode）;?end
%
%????????????is?equivalent?to:????????????????lev=activlev（sp（1:nsamp）fsmode）
%
%????????????but?is?much?slower.?The?two?methods?will?not?give?identical?results
%????????????because?they?will?use?slightly?different?thresholds.
%????????VAD?is?a?boolean?vector?the?same?length?as?sp?that?acts?as?an?approximate?voice?activity?detector

%For?completeness?we?list?here?the?contents?of?the?FSO?structure:
%
%???ffs?:?sample?frequency
%???fmd?:?mode?string
%????nh?:?hangover?time?in?samples
%????ae?:?smoothing?filter?coefs
%????bl?:?200Hz?HP?filter?numerator
%????al?:?200Hz?HP?filter?denominator
%????bh?:?5.5kHz?LP?filter?numerator
%????ah?:?5.5kHz?LP?filter?denominator
%????ze?:?smoothing?filter?state
%????zl?:?200Hz?HP?filter?state
%????zh?:?5.5kHz?LP?filter?state
%????zx?:?hangover?max?filter?state
%??emax?:?maximum?envelope?exponent?+?1
%???ssq?:?signal?sum?of?squares
%????ns?:?number?of?signal?samples
%????ss?:?sum?of?speech?samples?（not?actually?used?here）
%????kc?:?cumulative?occupancy?counts

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????12424??2012-11-19?09:19??activlev.m
?????文件????????1793??2011-10-16?15:45??atan2sc.m
?????文件????????2112??2012-10-26?11:36??axisenlarge.m
?????文件????????4465??2011-10-16?15:45??bark2frq.m
?????文件????????3305??2011-10-16?15:45??bitsprec.m
?????文件????????2469??2011-10-16?15:45??cblabel.m
?????文件????????2013??2011-10-16?15:45??ccwarpf.m
?????文件????????2046??2013-07-04?08:03??cent2frq.m
?????文件????????2131??2011-10-16?15:45??cep2pow.m
?????文件????????2239??2011-10-16?15:45??choosenk.m
?????文件????????1603??2011-10-16?15:45??choosrnk.m
?????文件???????13059??2013-08-23?10:37??Contents.m
?????文件????????3975??2010-09-24?18:08??correlogram.m
?????文件????????3819??2011-10-16?15:45??distchar.m
?????文件????????3422??2011-10-16?15:45??distchpf.m
?????文件????????3688??2011-10-16?15:45??disteusq.m
?????文件????????4641??2011-10-16?15:45??distisar.m
?????文件????????3736??2011-10-16?15:45??distispf.m
?????文件????????4170??2011-10-16?15:45??distitar.m
?????文件????????3601??2011-10-16?15:45??distitpf.m
?????文件????????1982??2011-10-16?15:45??ditherq.m
?????文件????????2746??2011-10-16?15:45??dlyapsq.m
?????文件????????3479??2013-05-02?13:53??dualdiag.m
?????文件???????26494??2013-06-13?22:17??dypsa.m
?????文件????????5073??2013-07-23?11:07??enframe.m
?????文件????????3906??2011-10-16?15:45??entropy.m
?????文件????????2733??2011-10-16?15:45??erb2frq.m
?????文件????????7306??2013-08-23?13:33??estnoiseg.m
?????文件???????16236??2012-03-31?17:42??estnoisem.m
?????文件????????2461??2011-10-16?15:45??ewgrpdel.m
?????文件????????3467??2013-06-14?10:10??fig2emf.m
............此處省略206個文件信息