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:
%???????????????0?-?omit?high?pass?filter?at?40?or?200?Hz?（i.e.?include?DC）
%???????????????4?-?high?pass?filter?at?40?Hz?instead?of?200?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?actuall

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-03-10?09:55??voicebox（附帶安裝教程）\
?????目錄???????????0??2019-03-10?09:55??voicebox（附帶安裝教程）\voicebox\
?????文件???????13310??2014-07-09?13:28??voicebox（附帶安裝教程）\voicebox\activlev.m
?????文件????????8389??2014-08-05?19:25??voicebox（附帶安裝教程）\voicebox\activlevg.m
?????文件????????1793??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\atan2sc.m
?????文件????????2112??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\axisenlarge.m
?????文件????????4728??2014-04-25?07:51??voicebox（附帶安裝教程）\voicebox\bark2frq.m
?????文件????????1705??2014-04-25?07:51??voicebox（附帶安裝教程）\voicebox\berk2prob.m
?????文件????????3305??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\bitsprec.m
?????文件????????2469??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\cblabel.m
?????文件????????2013??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\ccwarpf.m
?????文件????????2046??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\cent2frq.m
?????文件????????2131??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\cep2pow.m
?????文件????????2239??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\choosenk.m
?????文件????????1603??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\choosrnk.m
?????文件???????14140??2015-03-26?18:00??voicebox（附帶安裝教程）\voicebox\Contents.m
?????文件????????3975??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\correlogram.m
?????文件????????3819??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\distchar.m
?????文件????????3422??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\distchpf.m
?????文件????????3688??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\disteusq.m
?????文件????????4641??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\distisar.m
?????文件????????3736??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\distispf.m
?????文件????????4170??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\distitar.m
?????文件????????3601??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\distitpf.m
?????文件????????1982??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\ditherq.m
?????文件????????2746??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\dlyapsq.m
?????文件????????3479??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\dualdiag.m
?????文件???????26494??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\dypsa.m
?????文件????????5311??2014-07-24?09:49??voicebox（附帶安裝教程）\voicebox\enframe.m
?????文件????????3906??2014-01-16?08:43??voicebox（附帶安裝教程）\voicebox\entropy.m
?????文件????????3430??2015-03-01?17:02??voicebox（附帶安裝教程）\voicebox\erb2frq.m
............此處省略225個文件信息