Encoding Algorithms for 2 Dimensional Weak Run-Length-Limited Constraints

Weakly constrained codes were introduced for constructing efficient encoding algorithms with low complexities, that is, encoding algorithm which can be implemented with smaller circuits and less memories. In this paper we introduce 2-dimensional(2-D) weak input constraints for 2-D storage media. We propose coding rules for 2-D weak run-length-limited constraints. Simulation results show that these rules almost strictly obey given constraints. We can prove these results theoretically for some constraints.