Coding device and decoding device

Details Coding device and decoding device Coding device and decoding device

2007-09-11

2007-09-11

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

C341S050000

Reexamination Certificate

active

11394531

ABSTRACT:
Embodiments of the invention allow relatively simple circuits to provide a coding device capable of coding longer bit-length data suitably for disk apparatus and a decoding device capable of decoding the data coded by the coding device. In one embodiment, a coding device comprises: a coder which, based on an M bits code string, produces an (M+1) bits coded string where each of the plural bits which may appear in the M bits code string is limited in run length; a preprocessor which produces an M bits code string by removing (N−M) bits respectively from predefined (N−M) positions of an incoming N bits code string and outputs the M bits code string to the coder; and a postprocessor which produces and outputs an (N+1) bits code string by inserting the (N−M) bits, which are removed by the preprocessor, into predefined (N−M) respective insertion positions of the (M+1) bits coded string output from the coder.

REFERENCES:
patent: 4754492 (1988-06-01), Malvar
patent: 6335841 (2002-01-01), Hirano et al.
patent: 6557124 (2003-04-01), Cideciyan et al.
patent: 6681362 (2004-01-01), Abbott et al.
patent: 6681382 (2004-01-01), Kakumani et al.
patent: 6704154 (2004-03-01), Hirano et al.

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