matlab怎么提取音频

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matlab怎么提取音频

madio

使用wavread
, P+ g- m. [( C1 M; hCreate a WAV file from the example file handel.mat,
and read portions of the file back into MATLAB.% Create WAV file in current folder.
* O! I/ x! U7 s+ k6 H  Aload handel.mat

) R; }: S0 |6 R0 e' Z- d7 |6 shfile = 'handel.wav';
7 B! }1 C! [, M' kwavwrite(y, Fs, hfile)
clear y Fs
3 U9 q+ S/ l8 s, V# R, X
% Read the data back into MATLAB, and listen to audio.
9 ?# v6 L  l$ t: B- i" L[y, Fs, nbits, readinfo] = wavread(hfile);
sound(y, Fs);
- g+ [7 u$ e4 {/ k( K
% Pause before next read and playback operation.
duration = numel(y) / Fs;
pause(duration + 2)

% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
[y2, Fs] = wavread(hfile, nsamples);
0 c: N( `; y' Q4 G* `% xsound(y2, Fs);
6 k' T1 ^; }# X6 u; Vpause(4)

% Read and play the middle third of the file.
) j' _- ]9 g* dsizeinfo = wavread(hfile, 'size');

- A: M( c- A1 X1 K. |9 rtot_samples = sizeinfo(1);
5 a$ n  n' X5 i, i# X0 _startpos = tot_samples / 3;
% A$ @. R7 m/ G" Aendpos = 2 * startpos;

. ]3 L4 [# q% }, [[y3, Fs] = wavread(hfile, [startpos endpos]);
sound(y3, Fs);

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