Coded data generation or conversion – Digital code to digital code converters – To or from run length limited codes
Reexamination Certificate
2006-11-06
2008-12-16
Jeanglaude, Jean B (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from run length limited codes
C341S067000, C341S095000
Reexamination Certificate
active
07466246
ABSTRACT:
A DSV control bit determining/inserting unit11inserts DSV control bits for execution of DSV control into an input data string and outputs the data string including the DSV control bits to a modulation unit12.The modulation unit12converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit13.The conversion table used by the modulation unit12includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit. In addition, the conversion table enforces a conversion rule, according to which the remainder of division of the “1”count of an element in a data string by 2 having a value of 0 or 1 shall always be equal to the remainder of division of the “1” count of an element in the code resulting from conversion of the data string by 2.
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Kahlman Josephus A. H. M.
Nakagawa Toshiyuki
Nakamura Kosuke
Narahara Tatsuya
Schouhamer Immink Kornelis A.
Belk Michael E.
Jeanglaude Jean B
Koninklijke Philips Electronics , N.V.
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