Method and apparatus for generating run-length limited code
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Jul 31, 1995
filing date -
Nov 29, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and an apparatus are provided for generating an (4,20) RLL modulation code having a decreased detectible window width and an increased recording density ratio. The code's spectrum is concentrated in the low-frequency band, thereby improving the signal-to-noise ratio. In addition, the hardware of an encoder and a decoder can be easily implemented since the modulation code has a fixed codeword length.
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