On runlength-limited coding with DC control

Constructions are presented of finite-state encoders for certain (d,k) runlength-limited (RLL) constraints with direct current control. In particular, an example is provided for a rate 8:16 encoder for the (2,10)-RLL constraint that requires no look-ahead in decoding, thus, performing favorably compared to the EFMPlus code used in the DVD standard.