highpass-filter

How to implement a high-pass filter for an audio signal?

由 我的梦境 提交于 2019-12-23 05:47:12
问题 I am trying to do a music identification application like shazam. This is an android app. First i have captured an audio signal through the MIC. Next I have implemented the hanning window function and FFT to the audio signal as shown as following code : private class RecordAudio extends AsyncTask<Void, double[], Void> { @Override protected Void doInBackground(Void... params) { started = true; try { DataOutputStream dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(

How can I implement a high-pass Butterworth filter in Matlab? [duplicate]

由 孤人 提交于 2019-12-12 03:27:26
问题 This question already has answers here : High Pass Butterworth Filter on images in MATLAB (2 answers) Closed 2 years ago . According to Page#14 of this link, the equation for a high-pass Butterworth filter is, And, according to Page#17, the output should be something like the following, Now, I have looked at this answer in SO, and has written the following Matlab code using the formula given in the linked pdf document. The output looks different than that of the one given above. What is the

Implementing a High Pass filter to an audio signal

由 别等时光非礼了梦想. 提交于 2019-11-29 08:17:25
I was able to wrote a program for capturing an audio signal, remove background noise, applying window function and visualisation that signal. My program is working up to this point without an error. Now I am trying to implement a High Pass filter to my code. I have already found a API for this part. But I was unable to apply it according to my code. Here is my code : private class RecordAudio extends AsyncTask<Void, double[], Void> { @Override protected Void doInBackground(Void... params) { started = true; try { DataOutputStream dos = new DataOutputStream( new BufferedOutputStream(new

Implementing a High Pass filter to an audio signal

由 ≡放荡痞女 提交于 2019-11-28 01:41:02
问题 I was able to wrote a program for capturing an audio signal, remove background noise, applying window function and visualisation that signal. My program is working up to this point without an error. Now I am trying to implement a High Pass filter to my code. I have already found a API for this part. But I was unable to apply it according to my code. Here is my code : private class RecordAudio extends AsyncTask<Void, double[], Void> { @Override protected Void doInBackground(Void... params) {
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