Pulse or digital communications – Pulse code modulation – Length coding
Reexamination Certificate
2007-03-13
2007-03-13
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Pulse code modulation
Length coding
C341S058000, C341S059000
Reexamination Certificate
active
11088712
ABSTRACT:
An apparatus and method for modulating and demodulating data to transmit or record the data on a recoding medium. Data is modulated and demodulated into a variable-length code. The modulated data comprises a sync signal adding means for adding a sync signal to a train of codes after adding a minimum run. The demodulated data comprises a sync signal detecting means for detecting, from a train of codes, a sync signal having a pattern that breaks a maximum run, after detecting a minimum run. A SYNC bit inserting section adds a sync signal to a train of codes, after adding a minimum run, where the sync signal has a pattern that breaks a maximum run.
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Nakagawa Toshiyuki
Narahara Tatsuya
Shimpuku Yoshihide
Fan Chieh M.
Frommer William S.
Frommer & Lawrence & Haug LLP
Pathak Sudhanshu C.
Presson Thomas F.
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