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Presentation on Bipolar Encoding
Presented BySaddam Hussain 29
Ravi Kr Singh 27Abul Khair
Bobita KanuSukonya Sharmah
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
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:
Different Conversion Techniques
Digital to Digital Encoding
Types of Digital to Digital Encoding
Digital to digital encoding consist of three types
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
Types of Bipolar Encoding
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)
Bipolar AMI Encoding
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)
B8ZS Encoding
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)
HDB3 Encoding
http://wikipedia.com/binary_encoding
http://tutorialpoint.com/data_communication
http://slideshare.net/search?=binary_encoding
Refference
Thank You