Coded data generation or conversion – Digital code to digital code converters – To or from run length limited codes
Reexamination Certificate
2005-07-05
2005-07-05
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from run length limited codes
C341S058000, C341S094000, C341S095000
Reexamination Certificate
active
06914545
ABSTRACT:
An encoder for enabling selection of output bits that reduce run-length includes classification circuitry, a disparity control circuit, encoding circuitry, and a run-length control circuit. The classification circuitry is configured to receive data in a first bitwidth. An output of the classification circuitry is in communication with the disparity control circuit. The encoding circuitry is configured to encode the data received in the first bitwidth into a second bitwidth. The run-length control circuit is included in the encoding circuit and is selectively triggered in one coding scheme when a contiguous portion of the data of the first bitwidth is of a particular sequence, e.g., all logic ones, to generate a control signal. The run-length control circuit receives as additional inputs outputs of a portion of the encoding circuitry and a disparity signal from the current encoding cycle. The control signal, when generated, reduces run-length of the second bitwidth.
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