matlab怎么提取音频

﹏便是晴天ヾ

matlab怎么提取音频

madio

使用wavread
Create a WAV file from the example file handel.mat,
% ?# O. h  j' {8 M) Z" A5 Jand read portions of the file back into MATLAB.% Create WAV file in current folder.
6 x' O' k' v1 o: Bload handel.mat
  a) P, e, `1 u$ O  r) N% H4 G
, S; F) t3 M* v: bhfile = 'handel.wav';
wavwrite(y, Fs, hfile)
8 W7 h% C0 X( E  @clear y Fs

% Read the data back into MATLAB, and listen to audio.
[y, Fs, nbits, readinfo] = wavread(hfile);
sound(y, Fs);
6 Y# h6 D2 w/ n) R6 S6 ?
5 i/ O5 G' _+ |  r$ K  S% Pause before next read and playback operation.
% I; c5 n( ^7 ~duration = numel(y) / Fs;
pause(duration + 2)

% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
) W. X$ h' c0 P2 g4 {9 W[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
pause(4)

7 v0 j: j2 i( l1 X: F* Z% Read and play the middle third of the file.
sizeinfo = wavread(hfile, 'size');

9 m2 G4 E# [% W4 }; [tot_samples = sizeinfo(1);
. @1 F/ `9 `% I" E/ ]6 c  kstartpos = tot_samples / 3;
2 `5 r  K* e, L1 \7 r: zendpos = 2 * startpos;

: G. x+ h. v& o9 Q7 M& f[y3, Fs] = wavread(hfile, [startpos endpos]);
: e2 O* P9 i9 F! b" O  z. isound(y3, Fs);

陌上，烟雨遥