Initial commit

c++/Others/Various data encoding techniques.cpp

@@ -0,0 +1,232 @@
+Various data encoding techniques
+
+Code :
+
+# include <graphics.h>
+# include <iostream.h>
+# include <conio.h>
+# include <string.h>
+# include <dos.h>
+
+int main(void)
+{
+   void drawgrid(int, int, int, int);
+   void encode(char *,char *, int, int, int, int);
+   void draw(int ,int ,char *, int);
+
+   char *message;
+   int len;
+
+   clrscr();
+   cout << "
+DIGITAL ENCODING TECHNIQUES";
+   cout << "
+
+
+Enter the data to be encoded (max 24 bits) : ";
+
+   do{
+   cin >> message;
+   len = strlen(message);
+   if(len>24)
+     cout << "Message is greater than 12 bits, please type new message: 
+";
+   }while(len>24);
+
+   char *o_mess =new char[len];
+   char *e_mess =new char[len*2];
+   strcpy(o_mess,message);
+
+   int gd=DETECT, gm, i, x, y;
+
+   initgraph(&gd,&gm,"..\BGI");
+   setcolor(8);
+   settextstyle(DEFAULT_FONT,0,2);
+   outtextxy(100,10,"DIGITAL ENCODING TECHNIQUES");
+   setcolor(YELLOW);
+   rectangle(0,30,630,450);
+   rectangle(1,31,629,449);
+   setcolor(WHITE);
+   settextstyle(DEFAULT_FONT,0,0);
+   drawgrid(120,60,len,20);
+   outtextxy(10,50, "Message");
+
+   x= 137;
+   for(i=0; i<len; i++, x+=20)
+   {
+     if(o_mess[i]=='1')
+	outtextxy(x,50,"1");
+     else
+	outtextxy(x,50,"0");
+   }
+
+   x=120;
+   y=80;
+   outtextxy(10,100, "NRZ - L");
+   encode(o_mess,e_mess,len,0,2,0);
+   draw(x,y,e_mess,len*2);
+   y+=60;
+
+   outtextxy(10,160, "NRZ - I");
+   encode(o_mess,e_mess,len,3,4,0);
+   draw(x,y,e_mess,len*2);
+   y+=60;
+
+   outtextxy(10,220, "Bipolar AMI");
+   encode(o_mess,e_mess,len,3,1,0);
+   draw(x,y,e_mess,len*2);
+   y+=60;
+
+   outtextxy(10,280, "Pseudo Tenary");
+   encode(o_mess,e_mess,len,4,3,0);
+   draw(x,y,e_mess,len*2);
+   y+=60;
+
+   outtextxy(10,340, "Manchester");
+   encode(o_mess,e_mess,len,0,2,1);
+   draw(x,y,e_mess,len*2);
+   y+=60;
+
+   outtextxy(10,400, "D-Manchester");
+   encode(o_mess,e_mess,len,4,3,1);
+   draw(x,y,e_mess,len*2);
+   y+=60;
+
+   getch();
+   closegraph();
+
+   return 0;
+}
+
+void drawgrid(int x, int y, int pulses, int width)
+{
+   line(x,y,x+(pulses*width),y);
+   line(x,y,x,y+(width*12+150));
+
+   for(int i=0; i<pulses; i++)
+   {
+      setcolor(LIGHTBLUE);
+      line(x+width,y+1,x+width,y+(width*12+150));
+      setcolor(BLUE);
+      line(x+width/2,y+1,x+width/2,y+(width*12+150));
+      x+=width;
+   }
+   setcolor(WHITE);
+
+   return;
+}
+
+void draw(int x, int y, char *data, int len)
+{
+   int prev_y, curr_y;
+
+   prev_y = y;
+
+   for(int i=0; i<len; i++, x+=10)
+   {
+       if(data[i]=='2')
+	  curr_y = y;
+       if(data[i]=='1')
+	  curr_y = y+20;
+       if(data[i]=='0')
+	  curr_y = y+40;
+
+
+       line(x,curr_y,x+10,curr_y);
+       sound(70);
+       delay(50);
+       nosound();
+
+       if(prev_y != curr_y)
+	  line(x,prev_y,x,curr_y);
+	  sound(170);
+	  delay(50);
+	  nosound();
+
+       prev_y = curr_y;
+      delay(10);
+   }
+   return;
+}
+
+void encode(char *o_mess,char *e_mess,int len,int one,int zero, int 
+mid)
+{
+   int i, j, previous=2;
+
+   for(i=0, j=0; i<len; i++, j+=2)
+   {
+      if(o_mess[i]=='1')
+      {
+	 if(one==0)
+	    e_mess[j]='0';
+	 if(one==1)
+	    e_mess[j]='1';
+	 if(one==2)
+	    e_mess[j]='2';
+	 if(one==3)
+	 {
+	   if(previous==2)
+	   {
+	     previous=0;
+	     e_mess[j]='0';
+	   }
+	   else
+	   {
+	     previous=2;
+	     e_mess[j]='2';
+	   }
+	 }
+	 if(one==4)
+	 {
+	   if(previous==2)
+	     e_mess[j]='2';
+	   else
+	     e_mess[j]='0';
+	 }
+      }
+      else
+      {
+	 if(zero==0)
+	    e_mess[j]='0';
+	 if(zero==1)
+	    e_mess[j]='1';
+	 if(zero==2)
+	    e_mess[j]='2';
+	 if(zero==3)
+	 {
+	   if(previous==2)
+	   {
+	     previous=0;
+	     e_mess[j]='0';
+	   }
+	   else
+	   {
+	     previous=2;
+	     e_mess[j]='2';
+	   }
+	 }
+	 if(zero==4)
+	 {
+	   if(previous==2)
+	     e_mess[j]='2';
+	   else
+	     e_mess[j]='0';
+	 }
+      }
+      if(mid==1)
+      {
+	 if(e_mess[j]=='2')
+	     e_mess[j+1]='0';
+	 else
+	     e_mess[j+1]='2';
+	 if(previous==2)
+	    previous=0;
+	 else
+	    previous=2;
+      }
+      else
+	e_mess[j+1]=e_mess[j];
+   }
+   return;
+}