Line codes: Manchester code, Non-return-to-zero, Differential Manchester encoding, Modified AMI code, Scrambler, Line code, Gold code - Tapa blanda

Sinopsis

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 27. Chapters: Manchester code, Non-return-to-zero, Differential Manchester encoding, Modified AMI code, Scrambler, Line code, Gold code, Bit synchronous operation, Delay encoding, Bit stuffing, Self-synchronizing code, N-ary code, Ternary signal, Paired disparity code, Code conversion, Jaxon modulation, 2B1Q, 8b/10b encoding, Run-length limited, Group code recording, Modified Frequency Modulation, Bipolar encoding, Eight-to-fourteen modulation, 4B3T, 4B5B, Transition Minimized Differential Signaling, 6b/8b encoding, 64b/66b encoding, Barker code, Biphase mark code, MLT-3 encoding, Hybrid ternary code, Unipolar encoding, Carrier-Suppressed Return-to-Zero, Alternate-Phase Return-to-Zero, Clock recovery, Bipolar violation, Coded mark inversion, Data strobe encoding, Kasami code, Phase shaped binary transmission, Conditioned Diphase. Excerpt: In telecommunications, 8b/10b is a line code that maps 8-bit symbols to 10-bit symbols to achieve DC-balance and bounded disparity, and yet provide enough state changes to allow reasonable clock recovery. This means that the difference between the count of 1s and 0s in a string of at least 20 bits is no more than 2, and that there are not more than five 1s or 0s in a row. This helps to reduce the demand for the lower bandwidth limit of the channel necessary to transfer the signal. The code was described in 1983 by Al Widmer and Peter Franaszek in the IBM Journal of Research and Development. IBM was issued a patent for the scheme the following year. IBM's patent notwithstanding, the method, implementation and goals are very similar to Group Code Recording (GCR), used by IBM in its 3400 Series 6250 cpi 9-track tape drives introduced with its System/370 in 1970, by Apple in the floppy disk controller of its Apple II series introduced in 1978, and by Commodore in the floppy disk controller of the Co...

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