State modulation method and apparatus for inserting state...

Details State modulation method and apparatus for inserting state... State modulation method and apparatus for inserting state...

2006-09-05

2006-09-05

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

C341S058000

Reexamination Certificate

active

07102546

ABSTRACT:
A state modulation method and an apparatus for inserting state control codes are provided. To overcome the problems of inefficient control on direct current and low frequency component in conventional state modulation techniques, the disclosed method inserts state control codes in a state modulation method to increase the probability for selection. With multi-level characteristics, the inserted state control codes can provide a plurality of sets of different signals for selection during coding. Thereby, the direct current and low frequency components can be well controlled.

REFERENCES:
patent: 6362754 (2002-03-01), Van Dijk et al.
patent: 6456208 (2002-09-01), Nazari et al.
patent: 6604219 (2003-08-01), Lee et al.
Efficient dc-Free RLL Codes for Optical Recording Kee A. Schouhamer Immink, Fellow, IEE, Jin-Yong Kim, Sang-Woon Suh and Seong Keun Ahn 2003 IEEE p. 326-331, no month.

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