Rate-28/30 DC-free RLL code

Details Rate-28/30 DC-free RLL code Rate-28/30 DC-free RLL code

2007-01-24

2008-10-14

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

C341S058000, C341S068000, C341S069000, C341S094000

Reexamination Certificate

active

07436331

ABSTRACT:
A run-length limited (RLL) encoder includes a problematic-block detection module that receives a data block and that generates coding bits that indicate whether at least one of N portions of the data block include one of all ones and all zeros, where N is an integer greater than one. A mapping module generates an RLL codeword based on the data block and the coding bits. The RLL codeword includes N portions. One of the N portions of the RLL codeword is populated with the coding bits. At least another one of the remaining portions of the RLL codeword is populated with at least part of the data from one of the N portions of the data block that corresponds with the one of the N portions of the RLL codeword.

REFERENCES:
patent: 2957947 (1960-10-01), Bowers
patent: 3405235 (1968-10-01), Carter
patent: 6617985 (2003-09-01), Poeppelman
patent: 7174485 (2007-02-01), Silvus
patent: 7301482 (2007-11-01), Oberg
“K.A.S. Immink—Codes for Mars Data Storage Systesm”—pp. 101-103; and 185-200, date not provided.
“K.A.S. Immink—Codes for Mars Data Storage Systems”—pp. 221-223, date not provided.

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