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Improved Dibit (2,8) Code

IP.com Disclosure Number: IPCOM000061179D
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Howell, TD Patel, AM Siegel, PH [+details]

Abstract

In the dibit (2,8) code, single transitions and dibits, which comprising a pair of transitions, each representing the symbol "l", are encoded so that at least two, and at most eight, symbols "0" occur between any pair of dibits and/or single transitions. However, in previous dibit encoders, as described in [1], there is no restriction on the number of consecutive dibits separated by the minimum number of symbols "0". Without a constraint on the number of consecutive dibits separated by the minimum number of symbols "0", error propagation in the detector is not controllable. In the proposed code, error propagation in the detector is limited by allowing no more than two consecutive combinations of dibits separated by the minimum of two symbols "0".