matlab
代码说明：
detect the voice activity, using energy and frequency etc.
文件列表：
matlab
......\01.txt,2,2010-01-12
......\30_g729.fig,10659,2009-12-10
......\30_rate_energy.fig,10724,2009-12-10
......\drawdisp.asv,4790,2009-12-11
......\drawdisp.m,4910,2009-12-11
......\enframe.asv,2454,2009-10-03
......\enframe.m,2433,2009-11-10
......\kdt_004.wav,85214,2009-09-25
......\normalize.fig,13032,2009-11-12
......\normalize_20.fig,13086,2009-11-12
......\out.txt,566,2009-10-03
......\output.asv,2135,2009-11-12
......\output.m,2047,2010-01-19
......\readwav.m,8572,2009-09-25
......\sp01_babble_sn15.wav,45102,2005-07-13
......\statistic.asv,3916,2009-12-10
......\statistic.m,4364,2010-01-15
......\timit-g729.fig,12979,2009-12-11
......\vad.asv,4335,2009-10-04
......\vad.m,4748,2010-09-30
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