function?[levaffsofsx]=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

%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?threshods.

%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

%??????Copyright?（C）?Mike?Brookes?2008
%??????Version:?$Id:?activlev.mv?1.10?2010/08/20?20:54:59?dmb?Exp?$
%
%???VOICEBOX?is?a?MATLAB?toolbox?for?speech?processing.
%???Home?page:?http://www.ee.ic.ac.uk/hp/staff/dm

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????11102??2010-08-20?21:55??activlev.m
?????文件????????1798??2007-11-23?19:47??atan2sc.m
?????文件????????4470??2010-01-08?23:57??bark2frq.m
?????文件????????3310??2007-05-04?08:01??bitsprec.m
?????文件????????2474??2009-11-01?22:10??cblabel.m
?????文件????????2018??2007-05-04?08:01??ccwarpf.m
?????文件????????2136??2007-05-04?08:01??cep2pow.m
?????文件????????2244??2007-05-04?08:01??choosenk.m
?????文件????????1608??2007-05-04?08:01??choosrnk.m
?????文件???????10285??2010-08-20?21:58??Contents.m
?????文件????????3824??2007-05-04?08:01??distchar.m
?????文件????????3427??2007-05-04?08:01??distchpf.m
?????文件????????3693??2010-05-10?16:06??disteusq.m
?????文件????????4646??2007-05-04?08:01??distisar.m
?????文件????????3741??2007-05-04?08:01??distispf.m
?????文件????????4175??2007-05-04?08:01??distitar.m
?????文件????????3606??2007-05-04?08:01??distitpf.m
?????文件????????1987??2007-05-04?08:01??ditherq.m
?????文件????????2751??2007-05-04?08:01??dlyapsq.m
?????文件????????2483??2007-05-04?08:01??dualdiag.m
?????文件???????26180??2007-05-04?08:01??dypsa.m
?????文件????????2895??2009-11-01?22:08??enframe.m
?????文件????????3911??2007-05-04?08:01??entropy.m
?????文件????????2738??2010-07-28?20:46??erb2frq.m
?????文件???????15550??2008-05-22?18:17??estnoisem.m
?????文件????????2466??2007-05-04?08:01??ewgrpdel.m
?????文件????????2972??2009-09-29?22:12??figbolden.m
?????文件???????12784??2010-01-02?17:28??filtbankm.m
?????文件????????3512??2010-08-04?21:16??filterbank.m
?????文件????????4207??2007-05-04?08:01??findpeaks.m
?????文件????????2429??2008-09-24?10:58??finishat.m
............此處省略173個文件信息