# I Made

### Duta Wacana Christian University

Professional Interests: signal processing, watermarking

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**Content Feed**

Question

Error using wavread on only a file?

So here is my code & problem: ButtonA function pushbutton5_Callback(hObject, eventdata, handles) [fileName,filePath...

8 years ago | 1 answer | 0

### 1

answerQuestion

Implementing Watermarking DWT bad result?

I tried to implement this journal on matlab, i finally finish the code but sometimes it still give wrong output. I wanted to ...

8 years ago | 0 answers | 0

### 0

answersQuestion

How wavread found out the data sample of the wav file?

Hey i just want to know how did wavread function automatically recognize/found out the data sample of the wav file? because i fo...

8 years ago | 1 answer | 0

### 1

answerQuestion

Combining wavplay and filepath not working ?

Can't we dynamically choose the file we wanted to play? i tried this : [FileName,PathName] = uigetfile('*.wav','Selec...

8 years ago | 0 answers | 0

### 0

answersQuestion

Combine Wavread and Browse Filepath Using Gui ?

I'm trying to apply wavread function, but i want a dynamic input from user so i use two button 1 contains the wavread function, ...

8 years ago | 1 answer | 0

### 1

answerQuestion

Gui input and displaying string/char ?

Hey guys, today i just started learn about GUI in matlab so bear with me. I wanted to get input from an edit text and display it...

8 years ago | 2 answers | 0

### 2

answersQuestion

If Condition match but got the else statement ?

To put it simple my code similar to : k=6 if(a/b<k) && (a/b>=0) STATEMENT1 elseif(a/b>-k) && (a/b<0) ...

8 years ago | 2 answers | 0

### 2

answersQuestion

Cut the last n of matrix row ?

e.g i have matrix a : 1 2 3 4 5 6 7 i want to cut the last 2 row of matrix A ? and become 1 2 3...

8 years ago | 1 answer | 0

### 1

answerQuestion

why imwrite make image background become black ?

Anyone can tell me why the imwrite make the image background become black, i inserted an image of something with background of w...

8 years ago | 3 answers | 0

### 3

answersQuestion

Managing Matrix Content Using Loop ?

e.g i have variable data that containt matrix like these ; a1 b1 c1 a2 b2 c2 a3 b3 c3 and i wanted it stored like : ...

8 years ago | 1 answer | 0

### 1

answerQuestion

Convert binary image to rgb image again ?is it possible?

I'm trying to convert rgb image to binary image using code i found on this website too : Irgb = imread('wtmk.png'); ...

8 years ago | 2 answers | 0

### 2

answersHow can I convert text file to binary so that the final array is of integer or double format?

Try This : fid = fopen('example.txt'); x=fread(fid,'*char'); binary = dec2bin(x,8); binary_t=transpose(bin...

8 years ago | 1

Question

Write .wav file , from buffer ?

How to convert back after using buffer function on a signal, e.g i have code f=wavread('example.wav',native); leftch...

8 years ago | 1 answer | 0

### 1

answerQuestion

From logical to binary ?

So firstly i have convert a string into decimal then i do a xor to it so as the result i have a logical result stored in the var...

8 years ago | 1 answer | 0

### 1

answerQuestion

input of DWT and output of IDWT not same?

I tried to test out the dwt and idwt, before i used this code i've build my own formula to work on dwt and idwt. But i figured t...

8 years ago | 1 answer | 0

### 1

answerQuestion

Exclusive or between two different matrix size ?

I have two matrix A and B where e.g A < 1 x 500 > B < 1 x 32 > i wanted to perform xor, but i wanted xor(A,B) only the ...

8 years ago | 1 answer | 0

### 1

answerQuestion

How to separate binary values ?

I try to convert String to Binary , and after that i want to get A [0 1 0 1 0 1 0 0 0 1 0 0 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0...

8 years ago | 2 answers | 0

### 2

answersQuestion

Need help processing this

So i have e.g data < 3x3 int 16 > 4 5 3 5 4 1 2 1 2 i wanted to got 78 60 23 and the process is like : Colu...

8 years ago | 1 answer | 0

### 1

answerQuestion

Error Integers can only be combined with integers of the same class, or scalar doubles when processing my sample?

I have a3, it's data < 64x490 int16 > , and i wanted to do *row1*row1*1 then row2*row2*2 to row49*row49*49 and have the sum of i...

8 years ago | 2 answers | 0

### 2

answersQuestion

Buffer processing with high and low pass filtering ?

I have a buffer named segmen that has < 512 x 490 int16 > values in it r1c1 r1c2 r1c3 r1c4 r1c5 ... r1c490 (c1= column 1 r1=r...

8 years ago | 1 answer | 0

### 1

answerQuestion

Process each element in my buffer ?

As example i have this data on my buffer 1 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 10 1 3 4 5 6 7 8 9 10 1 2 i want to ca...

8 years ago | 1 answer | 0

### 1

answerQuestion

Putting buffer into 2 dimensional array ?

As example i have : frame=buffer(x,3); and take example it's output < 3 x 2 int16 > 1 2 3 4 5 6 and i wa...

8 years ago | 2 answers | 0

### 2

answersQuestion

Another Formula I Stuck with

Note: this question has connection to my prev question : <http://www.mathworks.com/matlabcentral/answers/65795-what-is-the-meani...

8 years ago | 1 answer | 0

### 1

answerQuestion

What is the meaning of this formula ?

Hii all, i'm stuck with this formula, i kinda confused and don't understand it. Need help : W = {W(i)= Img(k,j),i=k*M2+j, 0<=...

8 years ago | 2 answers | 0

### 2

answersQuestion

Read wav file in hexa

I want to read wav file in hexa, how i'm supposed to do that? rawsignal=wavread('tes.wav','native'); above code returns ...

9 years ago | 1 answer | 0

### 1

answerQuestion

Why does the num channel and sample exchange position?

I run the following code f=wavread('tes.wav','native'); v=[1/sqrt(2) 1/sqrt(2)]; w=[1/sqrt(2) -1/sqrt(2)]; if mo...

9 years ago | 0 answers | 0

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answersQuestion

Index exceeds matrix dimensions at buffer function

Here is what i'm gona trying to do : # I read a .wav file called tes.wav stored in y # I try performing 3-level Haar Wavelet...

9 years ago | 2 answers | 0

### 2

answersQuestion

How to apply DSSS ?

As i do some research on watermarking on audio i firstly wanted to insert some text to the audio signal, i just read a way to do...

9 years ago | 1 answer | 0

### 1

answerQuestion

What function to display the result of wavread?

[x,fs] = wavread('E:\Example\tes.wav'); if i use plot(x); there will be a graph of sine wave. But the display i wanted is ...

9 years ago | 1 answer | 0

### 1

answerQuestion

In case processing .wav file what would the input to DWT fucntion ?

So here is the formula of DWT as you can see [cA,cD] = dwt(X,'wname') cA = approximation coefficients vector cD = d...

9 years ago | 1 answer | 0