What Is 4B/5B Encoding?

- Aug 13, 2018-

The 4B/5B encoding is a group of every 4 bits of the data stream to be transmitted, and then converted into a corresponding 5-bit code according to the 4B/5B encoding rule. The 5-bit code is combined in 32, but only 16 different 4-bit codes are used, and the other 16 are used as control codes (start and end of frames, status information of lines, etc.) or reserved.

 

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