Coded data generation or conversion – Digital code to digital code converters – To or from minimum d.c. level codes
Reexamination Certificate
2006-01-10
2006-01-10
Mai, Lam T. (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from minimum d.c. level codes
C341S059000, C341S073000, C375S253000, C714S725000
Reexamination Certificate
active
06985094
ABSTRACT:
The present invention relates to a method for coding a data stream, in which the digital sum value of the coded data stream should be close to zero and two alternative code words can be used for the coding at least for some of the possible data values. It is the object of the invention to propose a method for coding a data stream which provides for simple coding of the data stream while at the same time ensuring a digital sum value close to zero. According to the invention, the object is achieved by a method in which the digital sum value of the coded data stream is determined, this value is compared with a first or a second boundary value in dependence on the polarity of the coded data stream and a received data value is coded by a first or a second code word belonging to the respective boundary value in dependence on the result of the comparison.
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Copy of Search Report Dated Jul. 30, 2003.
Laks Joseph J.
Mai Lam T.
Opalach Joseph J.
Thomson Licensing S.A.
Tripoli Joseph S.
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