I NEED HELP WITH THIS CODE?
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Index exceeds matrix dimensions.
Error in ==> wavplay at 56 y = varargin{1};
Error in ==> Untitled at 22 wavplay('Bird') >> clear; clc;
M=2;
freq_sep=100;
nsamp=6;
sampling_frequency=1000;
id=fopen('bird.wav');
data=fread(id,inf,'uint8');
data_bin=de2bi(data);
fsk_mod=fskmod(data_bin,M,freq_sep,nsamp,sampling_frequency);
noise=awgn(fsk_mod,10);
fsk_demod=fskdemod(noise,M,freq_sep,nsamp,sampling_frequency);
[num,rate]=biterr(data_bin,fsk_demod)
z=bi2de(fsk_demod);
a=uint8(z);
wavwrite(a,'Bird');
wavplay('Bird')
2 个评论
Walter Roberson
2012-5-14
Why are you reading the bird.wav file as binary? .wav files do not encode the sound as plain binary samples: they have a lot of compression, and should be read using wavread()
回答(1 个)
Walter Roberson
2012-5-15
wavplay(y,Fs) plays the audio signal stored in the vector y on a PC-based audio output device. Fs is the integer sample rate in Hz (samples per second). The default value for Fs is 11025 Hz. wavplay supports only 1- or 2-channel (mono or stereo) audio signals. To play in stereo, y must be a two-column matrix.
It does not appear to me that 'Bird' is a audio signal.
To be more explicit: wavplay() does not accept filenames. There is no MATLAB supplied routine for playing sound directly out of .wav files.
2 个评论
Walter Roberson
2012-5-16
No. sound() always waits for the noise to finish. wavplay() has an option to continue one the noise has started. Also, wavplay() can only be used for 32 bit MS Windows systems.
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