Device and method for modulation and transmission medium

Details Device and method for modulation and transmission medium Device and method for modulation and transmission medium

1998-05-13

2000-07-18

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

341 58, 341102, H03M 700

Patent

active

060913479

ABSTRACT:
Clock is reproduced stably. If data (limiting code) containing a plurality of consecutive minimum inversion interval Tmin is contained in the data inputted from a shift register, a Tmin consecution limiting code detection unit detects such consecutive interval. A constraint length judgement unit judges the constraint length i to be the constraint length corresponding to the code for limiting the constraint length i when a detection signal is inputted from the Tmin consecution limiting code detection unit, and outputs the judged constant length to a multiplexer. The multiplexer selects the output of a converter corresponding to the constraint length supplied from the constraint length judgement unit out of converters 14-1 to 14-r, and supplies the selected output to a run detection processing unit through a buffer.

REFERENCES:
patent: 5025256 (1991-06-01), Stevens
patent: 5062152 (1991-10-01), Faulkner
patent: 5355133 (1994-10-01), Shimpuku et al.
patent: 5400023 (1995-03-01), Ino et al.
patent: 5600315 (1997-02-01), Shimpuku et al.

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