数学建模社区-数学中国
标题:
matlab怎么提取音频
[打印本页]
作者:
﹏便是晴天ヾ
时间:
2013-11-6 21:05
标题:
matlab怎么提取音频
matlab怎么提取音频
作者:
madio
时间:
2013-11-7 10:11
使用wavread
( y5 R7 w! H- x n
Create a WAV file from the example file handel.mat,
* L) \( F, N `5 S
and read portions of the file back into MATLAB.% Create WAV file in current folder.
9 K' @2 l1 P! g5 _* r$ O
load handel.mat
1 k) ?2 O! M$ U8 Y7 H3 d2 m
+ w; i) @9 i2 G, S6 C- U* Z% ]
hfile = 'handel.wav';
; ]& I" t% v! g1 q
wavwrite(y, Fs, hfile)
- ?, w. A; J9 y: }$ G7 G. U8 p
clear y Fs
! h/ P! D, p% Q3 r, g: s& o: d
: h$ M9 \8 ?( t4 U7 r9 j
% Read the data back into MATLAB, and listen to audio.
' e+ M8 y, a7 q- W W% t5 ]6 F
[y, Fs, nbits, readinfo] = wavread(hfile);
" \3 g ?8 ~0 f; }5 h
sound(y, Fs);
( E( M+ }3 g2 E h* s; g
9 b% q* q) B; l+ g. b
% Pause before next read and playback operation.
9 m- P! o* j! P% n5 A, D
duration = numel(y) / Fs;
/ J" @0 B5 J2 z' l
pause(duration + 2)
5 ?. x) n) W. l3 q# R5 U: N' X& }
% D7 b) f9 x: x
% Read and play only the first 2 seconds.
0 _8 k8 A! C; R7 T8 u
nsamples = 2 * Fs;
4 A5 J* R' e$ R7 |9 _! S& @& _+ V- G3 `
[y2, Fs] = wavread(hfile, nsamples);
* M7 J2 L( k* c! N7 `' s, D+ n
sound(y2, Fs);
) Z4 R. F1 g( J+ U
pause(4)
# ^2 C3 ~2 k0 j+ f8 m* @$ d
) p1 r' `: C1 R, y4 P
% Read and play the middle third of the file.
$ `' t% S0 m7 d9 m0 m& l
sizeinfo = wavread(hfile, 'size');
9 S7 R( L# L+ a) R6 h
! S0 o8 G* G( h# F2 U* \8 t2 P
tot_samples = sizeinfo(1);
1 @0 y1 I7 x. l, k
startpos = tot_samples / 3;
- E/ k7 c5 Q y# @6 {7 Z# v
endpos = 2 * startpos;
1 V# A/ I _9 P4 a
0 t; X: f5 S! O0 b6 _; E( `$ w
[y3, Fs] = wavread(hfile, [startpos endpos]);
( d/ r2 T0 f7 p# W" u+ x1 D" M' M& k
sound(y3, Fs);
作者:
陌上，烟雨遥
时间:
2013-12-12 09:54
欢迎光临 数学建模社区-数学中国 (http://www.madio.net/)
Powered by Discuz! X2.5
