Patent ID: 7920076
Filing Date: 2011-04-05
Classification: H03M

Abstract:
1. A run length limiter comprising: a searcher configured to search, for a specific symbol, in a plurality of symbols having a larger number of patterns than the number of symbols included in input digital data, the specific symbol not coinciding with each symbol in the input digital data and having a pattern that ensures a minimum number of transitions of digital data obtained by exclusive OR operation of the specific symbol and the input digital data, the pattern of the specific symbol being set such that a transition of the specific symbol is present at a bit position at which each of the symbols of the input digital data tends to exhibit a larger number of transitions, and the transition of the specific symbol is absent at a bit position at which each of the symbols of the input digital data tends to exhibit a smaller number of transitions; an operator configured to execute the exclusive OR operation of the specific symbol and the digital data; and an output module configured to output the exclusive OR operated digital data, along with the specific symbol.