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