This presentation discusses different types of digital to digital encoding, focusing on bipolar encoding. It defines bipolar encoding as using three voltage levels (positive, negative, zero) to represent binary digits, with alternating positive and negative voltages representing alternating 1s. It then describes three popular types of bipolar encoding used in data communications: AMI, which uses a zero voltage to represent 0 and alternating voltages for alternating 1s; B8ZS, which substitutes the pattern when eight consecutive 0s occur based on previous digit polarity; and HDB3, which substitutes the pattern when four consecutive 0s occur based on previous digit polarity and number of 1s since last substitution.

1. Presentation on Bipolar
Encoding
Presented By
Saddam Hussain 29
Ravi Kr Singh 27
Abul Khair
Bobita Kanu
Sukonya Sharmah

2. Contents
 What is Encoding
 Different conversion techniques
 Digital to digital encoding diagram
 Types of digital to digital encoding
 Bipolar Encoding
 Types of Bipolar Encoding
 AMI
 B8ZS
 HDB3

3.  Information must be encoded into signals before it can be
transported across communication media.
 We must encode data into signals to send them from one
place to another.
Encoding:

4. Different Conversion Techniques

5. Digital to Digital Encoding

6. Types of Digital to Digital Encoding
Digital to digital encoding consist of three types

7.  Bipolar encoding uses three voltage levels: positive,
negative and zero. The zero level is used to represent
binary 0 positive and negative voltages represent
alternating 1s. (If 1st one +ve, 2nd is -ve).
 * Three types of bipolar encoding are popular use by the
data communications industry: AMI, B8ZS, and HDB3
Bipolar Encoding

8. Types of Bipolar Encoding

9. AMI means alternate 1 inversion. A neutral, zero
voltage represents binary 0.
Binary 1s are represented by alternating positive and
negative voltages
Bipolar Alternate Mark Inversion (AMI)

10. Bipolar AMI Encoding

11.  In B8ZS, if eight 0s come one after another, we
change the pattern in one of two ways based on the
polarity of previous 1.
Bipolar 8-Zero Substitution (B8ZS)

12. B8ZS Encoding

13.  In HDB3 if four 0s come one after another, we
change the pattern in one of four ways based on the
polarity of the previous 1 and the number of 1s since
the last substitution
High-Density Bipolar 3 (HDB3)

14. HDB3 Encoding

15. http://wikipedia.com/binary_encoding
http://tutorialpoint.com/data_communication
http://slideshare.net/search?=binary_encoding
Refference

16. Thank You