Parallel constrained coding with application to two-dimensional constraints

A parallel constrained coding scheme is considered where p blocks of raw data are encoded simultaneously into q tracks such that the contents of each track belong to a given constraint S It is shown that as q increases there are parallel block decodable encoders for S whose coding ratio p q converges to the capacity of S Examples are provided where parallel coding allows block decodable encoders while conventional coding at the same rate does not Parallel encoders are then applied as building blocks in the construction of block decodable encoders for certain families of two dimensional constraints