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Bipolar encoding

In telecommunication, bipolar encoding is a type of return-to-zero (RZ) line code, where two nonzero values are used, so that the three values are +, −, and zero. Such a signal is called a duobinary signal. Standard bipolar encodings are designed to be DC-balanced, spending equal amounts of time in the + and − states.

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Historical uses

B-MACMultiplexed Analogue ComponentsNICAM
3 related topics

Synchronization and zeroes

Non-return-to-zeroFrame synchronizationPCMMultiplexingRobbed-bit signaling
6 related topics

Alternate mark inversion

Paired disparity codeUnipolar encodingT-carrier
3 related topics

Other T1 encoding schemes

Modified AMI codesB8ZSHDB3
3 related topics

Topics to explore

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Overview

Alternate mark inversion

Voltage build-up

Synchronization and zeroes

Error detection

Other T1 encoding schemes

Historical uses

Advanced semantic analysis

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Map overview Semantic statistics

Bipolar encoding

Nodes30
Edges29
Triples26
Avg. degree1.93
Density0.066667
Components1

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Bipolar encoding

Top relations

related to Error detection · 8
Bipolar encoding → Another, BPV, Each, Every, In, T-carrier, The, Weakened
related to Synchronization and zeroes · 6
Bipolar encoding → Bipolar, However, Long, Other, These, Where
related to Alternate mark inversion · 4
Bipolar encoding → In, One, T-carrier, The
is a · 3
Bipolar encoding → often good compromise, paired disparity code, type of return-to-zero

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Important terminology

encoding bipolar data zero line bit used transmission code signal mark synchronization error transitions duobinary bits '1' channel binary always

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Bipolar encodingis atype of return-to-zero0.90text
Bipolar encodingis apaired disparity code0.90text
Bipolar encodingis aoften good compromise0.90text
line repeatersinstance ofLittle or no DC-component is considered an advantage because the cable may then be used for longer distances and to carry power for intermediate equipment0.80text
return-to-zero or some other more complicated line code may be more appropriateinstance ofa self-clocking encoding0.80text
though they introduce significant overhead.The coding was used extensively in first-generation PCM networksinstance ofa self-clocking encoding0.80text
and is still commonly seen on older multiplexing equipment todayinstance ofa self-clocking encoding0.80text
but successful transmission relies on no long runs of zeroes being presentinstance ofa self-clocking encoding0.80text
Bipolar encodingrelated to Alternate mark inversionOne0.60section
Bipolar encodingrelated to Alternate mark inversionIn0.60section
Bipolar encodingrelated to Alternate mark inversionThe0.60section
Bipolar encodingrelated to Alternate mark inversionT-carrier0.60section

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