Wednesday 7 May 2014

Reading audio file and removing background noise and saving it back using MATLAB

To read an audio file or to make an audio file..
1. Attach ur hands free that comes with ur mobile that has microphone /headset with microphone to the computer
2.In windows 7,  Go to Start->All Programs ->Accessories ->Sound Recorder
On the Floating window of sound recorder, Click on Start Recording
Now speak to the microphone ..Once done click on STOP recording and save the audio file in D: drive as lp.wma

%To read an audio file to matlab use audioread as shown below
y = audioread('d:/lp.wma');

%To remove background noise, use adaptive filter

n=1:length(y);
mtlb_noisy = y;
noise = n;
% Define Adaptive Filter Parameters
filterLength = 32;
weights = zeros(1,filterLength);
step_size = 0.004;
% Initialize Filter's Operational inputs
output = zeros(1,length(mtlb_noisy));
err = zeros(1,length(mtlb_noisy));
input = zeros(1,filterLength);
% For Loop to run through the data and filter out noise
for n = 1: length(mtlb_noisy),
%Get input vector to filter
for k= 1:filterLength
if ((n-k)>0)
input(k) = noise(n-k+1);
end
end
output(n) = weights * input';  %Output of Adaptive Filter
err(n)  = mtlb_noisy(n) - output(n); %Error Computation
weights = weights + step_size * err(n) * input; %Weights Updating
end
yClean = err;

% to save the output to D drive and with name re.mp4

audiowrite('d:/re.mp4',output,44100);

Monday 5 May 2014

WEB TECHNOLOGY RECORD


Chk my other blog http://MTechMessenger.blogspot.in to see the outputs of the programs
AIM: To design a student database using XML and display the content using XSL by validating through XML schema.

PROGRAM:

XML document
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="cse.xsl"?>
       <studentdata>
            <student>
                        <firstname>Lakshmi</firstname>
                        <lastname>V</lastname>
                        <rollno>CS18</rollno>
                        <dept>CSE</dept>
                        <course>Mtech</course>
            </student>
            <student>
                        <firstname>Sarvani</firstname>
                        <lastname>V</lastname>
                        <rollno>EC18</rollno>
                        <dept>ECE</dept>
                        <course>Mtech</course>
            </student>
       </studentdata>



XMLSchema

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
       <xs:elementType id="studentdata">
            <xs:elementType id="student">
                        <xs:elementType id="name">
                                    <xs:elementType id="firstname" type="#firstname"/>
                                                <xs:elementType id="lastname" type="#lastname"/>
                        </xs:elementType>
                        <xs:elementType id="rollno"/>
                        <xs:elementType id="dept"/>
                        <xs:elementType id="course"/>
            </xs:elementType>
       </xs:elementType>
</xs:schema>




XML Stylesheet :  CSE.xsl

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
       <xsl:output method="html"/>
       <xsl:template match="/">
                         <html>
                                    <head>
                            <title>details</title>
                                    </head>
                        <body>
                                       <table border="1">
                                <tr>
                                               <th>Firstname</th>
                                               <th>Lastname</th>
                                    <th>Rollno</th>                       
                                               <th>Course</th>
                             </tr>
                             <xsl:for-each select="studentdata/student">
                                    <xsl:if test="dept='CSE'">
                                             <tr style="background-color:teal">
                                                            <td> <xsl:value-of select="firstname"></xsl:value-of></td>
                                                 <td> <xsl:value-of select="lastname"> </xsl:value-of></td>
                                                <td> <xsl:value-of select="rollno">     </xsl:value-of></td>                                            
                                                 <td> <xsl:value-of select="course">    </xsl:value-of></td>
                                             </tr>
                                     </xsl:if>
                                     <xsl:if test="dept='ECE'">
                                             <tr style="background-color:green">
                                                            <td> <xsl:value-of select="firstname"></xsl:value-of></td>
                                                 <td> <xsl:value-of select="lastname"> </xsl:value-of></td>
                                                <td> <xsl:value-of select="rollno">     </xsl:value-of></td>                                            
                                                 <td> <xsl:value-of select="course">    </xsl:value-of></td>
                                             </tr>
                                      </xsl:if>
                                </xsl:for-each>
                                       </table>
                        </body>
            </html>
       </xsl:template>
</xsl:stylesheet>


RESULT: Hence the program to design a student database using XML and display the content using XSL by validating through XML schema have been successfully completed


OUTPUT:




AIM: To design a web application using different types of CSS.

PROGRAM:
<html>
       <head>
            <link rel="stylesheet" type="text/css" href="E.css"/>
            <style type="text/css">
                        .medium {border-width:medium}
                        .thin {border-width:thin}
                        .solid {border-style:solid}
                        .outset {border-style:outset}
                        .red {border-color:red}
                        .blue {border-top-color:blue;border-left-color:red;border-right-color:red;
                                    border-bottom-color:blue;margin-bottom:1em}
            </style>
       </head>   
       <body>
            <p>This text doesnot have style applied</p>

            <p style="font-size:20pt;color:SteelBlue">this text has inline style
                                     <em>font-size</em><em> color</em> applied to it.</p>

            <p>These have embedded styles applied</p>
            <div class="thin red solid">thin red Solid Border</div>
            <hr>
            <div class="medium blue outset ">medium blue outset Border</div>
           
            <p>These have external styles applied</p>
            <div class="section">
                        <div class="floated"> External StyleSheets</div>
                        A style sheet is linked using link element that uses rel attribute="stylesheet"
                        means the linked document is a stylesheet for this document.
            </div>
       </body>                                                                                                               
</html>

E.css:
div.floated      {          background-color:#eeeeee;
                                    font-size:1.5em;
                                    font-family:arial;                      
                                    margin-bottom:.5em;
                                     float:right;
                                     text-align:center;
                                     width:50%;
                        }
div.section       {         
                                     border: 1px solid #bbddff
                         }


RESULT: Hence the design of web application using different types of CSS  has been successfully executed


OUTPUT:




AIM: To write a program in Java Script  for displaying the current date in the following format. FRIDAY, 3-May-2013

PROGRAM:

<html>
       <head>
       <script type="text/javascript">
            var current = new Date();
            var d=["SUNDAY","MONDAY","TUESDAY","WEDNESDAY",
                        "THURSDAY","FRIDAY","SATURDAY"];
            var  m=["January","February","March","April","May","June","July","August",
                          "September","October","November","December"];

            document.writeln("<h1>Today's date is</h1>");
            document.writeln(d[current.getDay()]);
            document.write(","+current.getDate());
            document.write("-"+m[current.getMonth()]);
            document.write("-"+current.getYear());
       </script>
       </head>
       <body>
       </body>
</html>


RESULT: Hence the program that displays the current date in the following format FRIDAY, 3-May-2013 has been successfully executed.

OUTPUT:




AIM: To write a Java Script program that uses onMouseOver and onMouseOut events

PROGRAM:

<html>
       <head>
             <script>
                     function bigImg(x)
                     {
                            x.style.height="256px";
                            x.style.width="256px";
                     }

                     function normalImg(x)
                     {
                            x.style.height="64px";
                            x.style.width="64px";
                     }
             </script>
       </head>
       <body>
             <img onMouseOver="bigImg(this)" onMouseOut="normalImg(this)" border="0"
                     src="p.jpg" alt="Flower" width="32" height="32">

       </body>
</html>


RESULT: Hence the Java Script program that uses onMouseOver and onMouseOut events has been successfully executed.
OUTPUT:








AIM: To write an applet program that implements ItemListener

PROGRAM:

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

/*
<applet code=" ItemListenerDemo " width=200 height=200>
</applet>
*/

public class ItemListenerDemo extends Applet implements ItemListener
{
       Choice c;
       public void init()
       {
             c = new Choice();                                          //create choice or combobox
             c.add("red");                                                  //add items to the choice
             c.add("green");
             c.add("blue");
             c.add("pink");
             add(c);                                                          //add choice or combobox
             c.addItemListener(this);                               //add item listener
       }       
       public void paint(Graphics g)
       {
               // To get selected item, use String getSelectedItem() method of AWT Choice class.
                
                g.drawString(c.getSelectedItem(),10, 70);
        }

        public void itemStateChanged(ItemEvent e)
       {
                repaint();             
       }
}


RESULT: Hence the applet program that implements ItemListener has been successfully executed.



OUTPUT:








AIM:  To design an applet with ‘n’ labels with ‘n’ different colours occupy ‘n’ grids.

PROGRAM:

import java.awt.*;
import java.awt.GridLayout.*;
import java.applet.*;

/*<applet code="GridDemo" width="300" height="200"></applet>*/

public class GridDemo extends Applet
{
       static final int n=4;
       Label l[] = new Label[16];
       Color[] c;
       public void init()
       {
             c= new Color[16];
 Color c[] = { Color.blue,Color.cyan, Color.black,Color.red, Color.gray, Color.green,     
                      Color.lightGray,Color.blue, Color.magenta, Color.orange, Color.pink,
                      Color.cyan,Color.red, Color.white, Color.green, Color.yellow,
                       Color.darkGray };                            
setLayout(new GridLayout(n,n));
         
            for(int i=0;i< n;i++)
             {
                     for(int j=0;j< n;j++)
                     {
                            int k=i*n+j;
                            if(k>0)
                            {
                                    l[k]=new Label(""+k);
                                    l[k].setBackground(c[k]);
                                    add(l[k]);        
                            }
                     }
             }
       }
}


RESULT: Hence the applet program with ‘n’ labels with ‘n’ different colours occupy ‘n’ grids has been successfully executed.



OUTPUT:








AIM: To write an applet program that allows parameter passing.

PROGRAM:

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

/*
<applet code="ParamDemo" width="300" height="200" >
       <param name=w value=100 />
       <param name=h value=50 />
</applet>*/

public class ParamDemo extends Applet implements ActionListener
{
       Button b1;
       int w,h;

       public void init()
       {
             setBackground(Color.YELLOW);
             b1=new Button("Change");
             b1.addActionListener(this);
             add(b1);
       }
      
       public void start()
       {
             setSize(800,800);
             setVisible(true);
             String s1= getParameter("w");
             String s2= getParameter("h");
             w=Integer.parseInt(s1);
             h=Integer.parseInt(s2);
       }
       public void actionPerformed(ActionEvent ac)
       {
             setSize(w,h);
       }
}


RESULT: Hence the  applet program that allows parameter passing has been successfully executed.



OUTPUT:














AIM: To write an applet program that implements AdjustmentListener.

PROGRAM:

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

/*<applet code="AdjDemo" width="300" height="200" >
</applet>*/

public class AdjDemo extends Applet implements AdjustmentListener
{
       Scrollbar s1,s2,s3;
       TextField t1;

       public void init()
       {
             setLayout(new BorderLayout());
             s1 = new  Scrollbar(0,125,15,0,255);
             s2 = new Scrollbar(Scrollbar.VERTICAL, 0, 51, 0, 255);
             s3 = new  Scrollbar(0,205,15,0,255);
             t1 = new TextField(20);
             s1.setBackground(Color.YELLOW);
             s2.setBackground(Color.RED);
             s3.setBackground(Color.blue);
             s1.addAdjustmentListener(this);
             s2.addAdjustmentListener(this);
             s3.addAdjustmentListener(this);
             add(s1,BorderLayout.NORTH);
             add(s2,BorderLayout.WEST);
             add(s3,BorderLayout.SOUTH);
             add(t1,BorderLayout.EAST);
       }
       public void adjustmentValueChanged(AdjustmentEvent e)
       {
             setBackground(new Color(s1.getValue(),s2.getValue(),s3.getValue()));
             t1.setText("value of s1,s2,s3 is"+s1.getValue()+s2.getValue()+s3.getValue());
       }
       public void start()
       {
             setSize(400,400);
             setVisible(true);
       }
}

RESULT: Hence the applet program that implements AdjustmentListener has been successfully executed.
OUTPUT:





AIM: To design an GUI application using Swings that has a button that uses JColorChooser
to change the background of the application to the color choosen in JColorChooser.

PROGRAM:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class J extends JFrame implements ActionListener
{
       private Container p;
       public J()
       {
            super("JC");
            p = getContentPane();
            p.setBackground(Color.WHITE);
            p.setLayout(new FlowLayout(FlowLayout.CENTER));
            JButton btn = new JButton("Select background color");
            btn.addActionListener(this);
            p.add(btn);
            this.setSize(300,100);
       }

       public void actionPerformed(ActionEvent ac)
       {
             Color b= JColorChooser.showDialog(this,"Select Color",this.getBackground());
            if(b != null)
                        p.setBackground(b);
       }
}

public class Ex
{
       public static void main(String a[])
       {
             J cc = new J();
             cc.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            cc.setVisible(true);
       }
}


RESULT: Hence the GUI application using Swings has been successfully executed.
OUTPUT:













AIM: Write a simple Java program to display the details of a particular department from Access database.

PROGRAM:

import java.sql.*;
public class AccessDatabase
{
       public static void main(String[] args)
       {
        try
       {
             Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            
             Connection con = DriverManager.getConnection("jdbc:odbc:db1");
            
             Statement st=con.createStatement();
            
             ResultSet rs = st.executeQuery("select * from department where deptno='1'");
 
             while (rs.next())
             {
                     System.out.println("Deptno= " + rs.getString(1) + " Deptname= " +
                                                       rs.getString(2)+ " Location = " + rs.getString(3));

             }
       }
       catch(Exception e)
       {
             System.out.println("this is");
            System.out.println(e);
        }
    }
}


RESULT: Hence a simple Java program to display the details of a particular department has been successfully executed.



OUTPUT:







AIM: To write a servlet program that creates a new user entry in the user table in database.

User entry is done through html form and a new user is created on clicking login button on form.html.


PROGRAM:

Form.html

<html>
       <body>
             <form method="post" action="http://localhost/3">
                     Login : &nbsp&nbsp&nbsp&nbsp&nbsp
                     <input type=text name="login">
                     <br>
                     Password : <input type=password name="password">
                     <br>
                     <input type=submit value="login">
                     <input type=reset  value="clear">
             </form>
       </body>
</html>





SERVLET PROGRAM:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class DBServlet extends HttpServlet
{
     public void doPost(HttpServletRequest req, HttpServletResponse res) throws
                                                                                    ServletException, IOException
       {
             String login=req.getParameter("login");
             String pwd=req.getParameter("password");
             try
             {
                     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                     Connection con = DriverManager.getConnection("jdbc:odbc:db1");
                    
                     PreparedStatement st=con.prepareStatement("insert into user values (?,?)"); 
                     st.setString(1,login);
                     st.setString(2,pwd);
            
                     int n = st.executeUpdate();
                     con.close();
                    
                     res.setContentType("text/html");
                     PrintWriter out =res.getWriter();
      
                     out.println("<html><body><h1>");
                     if(n >0)
                     {
                            out.println("new user created");
                     }
                     else
                     {
                            out.println("new user not created");
                     }
                    
                     out.println("</h1></body></html>");
                     out.close();
             }

             catch(Exception e)
             {
                     System.out.println("this is");
                     System.out.println(e);
             }
       }
}

RESULT: Hence the servlet program has been successfully executed.
OUTPUT:














Servlet entry in web.xml:

<servlet>
        <servlet-name>DBServlet</servlet-name>
        <servlet-class>DBServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>DBServlet</servlet-name>
        <url-pattern>/3</url-pattern>
    </servlet-mapping>



AIM: To write a JSP program that displays the data in the user table that exists in database.

PROGRAM:
<html>
       <body>
       <table border="1">
       <%@ page import="javax.sql.*;" %>
       <%
              java.sql.Connection con=null;
              java.sql.Statement s=null;
              java.sql.ResultSet rs=null;
              java.sql.ResultSetMetaData rsmd;
              try
             {
                     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                     con = java.sql.DriverManager.getConnection("jdbc:odbc:db1");
                     s = con.createStatement();
                     rs = s.executeQuery("select  * from user");
                     rsmd=rs.getMetaData();
                     int count = rsmd.getColumnCount();
                    
                     out.print("<tr>");
                     for (int i=1; i<=count; i++)
                     {
                            out.print("<th>");
                            out.print(rsmd.getColumnName(i));
                     }
                     out.println("</tr>");
             %>
             <%
                     while( rs.next() )
                     {
             %>
             <tr>
                     <td><center><%= rs.getString("Login") %></center></td>
                     <td><center><%= rs.getString("Password") %></center></td>
             </tr>
             <%
                     }
             %>

       <%
             }
             catch(Exception e)
                     e.printStackTrace();
       %>
       </table>
       </body>
</html>

RESULT: Hence the  JSP program that displays the data in the user table has been successfully executed.


OUTPUT: