Patent ID: 7646826

Claim:
A type dependency modulation method with type control that combines the concepts of code word type and code word set, and inserts type-control code words at a predetermined interval during an encoding procedure to increase an effect of DC component control, the method comprising the steps of: (a) executing said encoding procedure to find a code word corresponding to a data word; (b) executing a counter accumulation procedure using a counter to accumulate a counter value until the counter value reaches said predetermined interval; and (c) when reaching the predetermined interval, executing the steps of: inserting said type-control code word for determining next code word to be connected, wherein the type-control code word is selected from a type-control code word vector Vj in a type-control code word set Ti, where i>0 and j>0; and resetting the counter value to zero after inserting said type-control code word, wherein steps (a) through (c) are repeated until all the data word are encoded.