9B/10B encoding and decoding method

A 9B/10B encoding method for encoding a 9-bit source sequence set into a 10-bit target sequence set, wherein each sequence in the 9-bit source sequence set is a 9-bit binary number, and each sequence in the encoded 10-bit target sequence set is a 10-bit binary number, and the 10-bit target sequence set comprises a balanced sequence and an unbalanced sequence, and different 9-bit source sequences are encoded into different 10-bit target sequences,

• wherein,
• the 9-bit source sequence set comprises a first type of 9-bit source sequence set, a second type of 9-bit source sequence set and a third type of 9-bit source sequence set, wherein the three types of 9-bit source sequence sets are disjoint, and a unified set of the three types of 9-bit source sequence sets has 512 non-repetitive 9-bit source sequences,
• the first type of 9-bit source sequence set only comprises 9-bit source sequences with difference values of 1 and −1, and each 9-bit source sequence in the first type of 9-bit source sequence set is encoded into a 10-bit target balanced sequence after inserting 1-bit data “0” or “1” at a same position,
• the second type of 9-bit source sequence set alternatively comprises only 9-bit source sequences with a difference value of 3 or only 9-bit source sequences with a difference value of −3,
• if the second type of 9-bit source sequence set only comprises 9-bit source sequences with a difference value of 3, 1-bit data “0” is inserted into the 9-bit source sequence, and the formed 10-bit target sequence and an opposite number thereof form a pair of 10-bit target unbalanced sequences with a difference value of ±2, which are codes of the 9-bit source sequence with a difference value of 3,
• if the second type of 9-bit source sequence set only comprises 9-bit source sequences with a difference value of −3, 1-bit data is inserted into the 9-bit source sequence, and the formed 10-bit target sequence and an opposite number thereof form a pair of 10-bit target unbalanced sequences with a difference value of ±2, which are codes of the 9-bit source sequence with a difference value of −3,
• the third type of 9-bit source sequence set comprises a third type of 9-bit source sequence subset A and a third type of 9-bit source sequence subset B, which are disjoint, and a unified set of the third type of 9-bit source sequence subset A and the third type of 9-bit source sequence subset B is the third type of 9-bit source sequence set,
• each 9-bit source sequence comprised in the third type 9-bit source sequence subset A is encoded into a 10-bit target balanced sequence,
• each 9-bit source sequence comprised in the third type of 9-bit source sequence subset B is encoded into a pair of 10-bit target unbalanced sequences that are opposite numbers for each other.

A 9B/10B decoding method for decoding a 10-bit target sequence set into a 9-bit source sequence set, wherein the decoding method is an inverse transformation of an encoding method, and the encoding method is used for encoding the 9-bit source sequence set into a 10-bit target sequence set, each sequence in the 9-bit source sequence set is a 9-bit binary number, each sequence in the encoded 10-bit target sequence set is a 10-bit binary number, and the 10-bit target sequence set comprises a balanced sequence and an unbalanced sequence,

• wherein,
• the 9-bit source sequence set comprises a first type of 9-bit source sequence set, a second type of 9-bit source sequence set and a third type of 9-bit source sequence set, wherein the three types of 9-bit source sequence sets are disjoint, and a unified set of the three types of 9-bit source sequence sets has 512 non-repetitive 9-bit source sequences, the first type of 9-bit source sequence set only comprises 9-bit source sequences with difference values of 1 and −1, and each 9-bit source sequence in the first type of 9-bit source sequence set is encoded into a 10-bit target balanced sequence after inserting 1-bit data “0” or “1” at a same position,
• the second type of 9-bit source sequence set alternatively comprises only 9-bit source sequences with a difference value of 3 or only 9-bit source sequences with a difference value of −3,
• if the second type of 9-bit source sequence set only comprises 9-bit source sequences with a difference value of 3, 1-bit data “0” is inserted into the 9-bit source sequence, and the formed 10-bit target sequence and an opposite number thereof form a pair of 10-bit target unbalanced sequences with a difference value of ±2, which are codes of the 9-bit source sequence with a difference value of 3,
• if the second type of 9-bit source sequence set only comprises 9-bit source sequences with a difference value of −3, 1-bit data is inserted into the 9-bit source sequence, and the formed 10-bit target sequence and an opposite number thereof form a pair of 10-bit target unbalanced sequences with a difference value of ±2, which are codes of the 9-bit source sequence with a difference value of −3,
• each 9-bit source sequence comprised in the third type of 9-bit source sequence set is encoded into a pair of 10-bit target unbalanced sequences that are opposite numbers for each other.

A 9B/10B decoding method for decoding a 10-bit target sequence set into a 9-bit source sequence set, wherein the decoding method is an inverse transformation of an encoding method, and the encoding method is used for encoding the 9-bit source sequence set into a 10-bit target sequence set, each sequence in the 9-bit source sequence set is a 9-bit binary number, each sequence in the encoded 10-bit target sequence set is a 10-bit binary number, and the 10-bit target sequence set comprises a balanced sequence and an unbalanced sequence,

• wherein,
• the 9-bit source sequence set comprises a first type of 9-bit source sequence set, a second type of 9-bit source sequence set and a third type of 9-bit source sequence set, wherein the three types of 9-bit source sequence sets are disjoint, and a unified set of the three types of 9-bit source sequence sets has 512 non-repetitive 9-bit source sequences,
• the first type of 9-bit source sequence set only comprises 9-bit source sequences with difference values of 1 and −1, and each 9-bit source sequence in the first type of 9-bit source sequence set is encoded into a 10-bit target balanced sequence after inserting 1-bit data “0” or “1” at a same position,
• the second type of 9-bit source sequence set alternatively comprises only 9-bit source sequences with a difference value of 3 or only 9-bit source sequences with a difference value of −3,
• if the second type of 9-bit source sequence set only comprises 9-bit source sequences with a difference value of 3, 1-bit data “0” is inserted into the 9-bit source sequence, and the formed 10-bit target sequence and an opposite number thereof form a pair of 10-bit target unbalanced sequences with a difference value of ±2, which are codes of the 9-bit source sequence with a difference value of 3,
• if the second type of 9-bit source sequence set only comprises 9-bit source sequences with a difference value of −3, 1-bit data is inserted into the 9-bit source sequence, and the formed 10-bit target sequence and an opposite number thereof form a pair of 10-bit target unbalanced sequences with a difference value of ±2, which are codes of the 9-bit source sequence with a difference value of −3,
• the third type of 9-bit source sequence set comprises a third type of 9-bit source sequence subset A and a third type of 9-bit source sequence subset B, which are disjoint, and the unified set of the third type of 9-bit source sequence subset A and the third type of 9-bit source sequence subset B is the third type of 9-bit source sequence set,
• each 9-bit source sequence comprised in the third type 9-bit source sequence subset A is encoded into a 10-bit target balanced sequence,
• each 9-bit source sequence comprised in the third type of 9-bit source sequence subset B is encoded into a pair of 10-bit target unbalanced sequences that are opposite numbers for each other.