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Block coding.

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Presentation on theme: "Block coding."— Presentation transcript:

1 Block coding

2 Substitution in block coding

3 4B/5B encoding Data Code 0000 11110 1000 10010 0001 01001 1001 10011 0010 10100 1010 10110 0011 10101 1011 10111 0100 01010 1100 11010 0101 01011 1101 11011 0110 01110 1110 11100 0111 01111 1111 11101

4 4B/5B encoding (Continued) Q (Quiet) 00000 I (Idle) 11111 H (Halt)
Data Code Q (Quiet) 00000 I (Idle) 11111 H (Halt) 00100 J (start delimiter) 11000 K (start delimiter) 10001 T (end delimiter) 01101 S (Set) 11001 R (Reset) 00111

5 Example of 8B/6T encoding
28 = 256 bits to encode 36 = 729 codes, other codes For synchronization

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