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Encoding Schemes
阅读量:4057 次
发布时间:2019-05-25

本文共 1628 字,大约阅读时间需要 5 分钟。

Encoding Schemes

Code Name Binary Code Code Definition
NRZ-L NRZ-L Picture Non-Return-to-Zero Level
"One" is represented by one level
"Zero" is represented by another level lower the one but not zero.
NRZ-M NRZ-M Picture Non-Return-to-Zero Mark
"One" is represented by a change in level
"Zero" is represented by no change in level.
NRZ-S NRZ-S Picture Non-Return-to-Zero Space
"One" is represented by no change in level
"Zero" is represented by change in level.
NRZ-I NRZ-I Picture Non-Return-to-Zero Inverse
"One" is represented by no change in level
"Zero" is represented by change in level.
Bi-Phase-L Bi-Phase-L Picture Bi-Phase Level (Split Phase)
Level change occurs at the beginning of every bit period
"One" is represented by a "One" level with transition to the "Zero" level
"Zero" is represented by a "Zero" level with transition to the "One" level.
Bi-Phase-M Bi-Phase-M Picture Bi-Phase Mark
Level change occurs at the beginning of every bit period
"One" is represented by a midbit level change
"Zero" is represented by no midbit level change.
Bi-Phase-S Bi-Phase-S Picture Bi-Phase Space
Level change occurs at the beginning of every bit period
"One" is represented by no midbit level change
"Zero" is represented by a midbit level change.
DBi-Phase-M DBi-Phase-M Picture Differential Bi-Phase Mark
Level change occurs at the center of every bit period
"One" is represented by no level change at the beginning of the bit period
"Zero" is represented by a level change at the beginning of the bit period.
DBi-Phase-S DBi-Phase-S Picture Differential Bi-Phase Space
Level change occurs at the center of every bit period
"One" is represented by a level change at the beginning of the bit period
"Zero" is represented by no level change at the beginning of the bit period.

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