How can I remove the noise in voice file?

조회 수: 1 (최근 30일)
In Sik Kim
In Sik Kim 2018년 10월 7일
편집: Dimitris Kalogiros 2018년 10월 7일
The attached speech.dat file has a lot of noise.
What can I do to hear exactly what it is saying?
plz let me know what it say.
  댓글 수: 5
In Sik Kim
In Sik Kim 2018년 10월 7일
It is 'dat' file
You can use just speech.dat in matlab
Image Analyst
Image Analyst 2018년 10월 7일
Again, what format is it? It doesn't seem to be able to be read in with audioread():
Error using audioread (line 104)
The file type is not supported
Error in test2 (line 1)
[y, fs] = audioread('speech.dat')
Please attach the code you used to read it in and play it.

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답변 (1개)

Dimitris Kalogiros
Dimitris Kalogiros 2018년 10월 7일
편집: Dimitris Kalogiros 2018년 10월 7일
In the following figure, it is depicted the original signal and a filtered version of it.
If you use the sound() command;
sound(speech, 8000);
sound(speech_filtered, 8000);
There is no difference on what you are going to hear. And this is something that is expected, cause the original signal, seems to have no added noise outside its main occupied bandwidth. I tried out many cutoff frequencies at my low pass filter, but no significant improvement. The speech signal indeed is distorted, but this distortion is not an awgn.
  댓글 수: 1
Dimitris Kalogiros
Dimitris Kalogiros 2018년 10월 7일
...and something else: your sampling frequency must be slightly greater than 8KHz

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