Encoding Schemes

Encoding Schemes

Code Name	Binary Code	Code Definition
NRZ-L		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		Non-Return-to-Zero Mark "One" is represented by a change in level "Zero" is represented by no change in level.
NRZ-S		Non-Return-to-Zero Space "One" is represented by no change in level "Zero" is represented by change in level.
NRZ-I		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 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 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 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		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		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.