Apparatus for modulating digital data and adding control data

Details Apparatus for modulating digital data and adding control data Apparatus for modulating digital data and adding control data

1995-09-20

1999-01-12

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

341 58, H03M 700

Patent

active

058596003

ABSTRACT:
An apparatus for modulating input data so that at least a part of a predetermined number of the input data is influenced by control data and adding the control data every predetermined number of modulated input data. The apparatus includes (a) modulating mechanism for modulating the input data so that a portion of the predetermined number of the input data exerts an influence on a part of another predetermined number of the input data; (b) detecting mechanism for detecting a specific frequency component in the modulated input data that is outputted from the modulating mechanism; (c) generating mechanism for generating the control data in accordance with an output of the detecting mechanism; and (d) selecting mechanism for selectively outputting the control data generated by the generating mechanism, data that is influenced by the control data in output data of the modulating mechanism, and data that is not influenced by the control data.

REFERENCES:
patent: 5142421 (1992-08-01), Kahlman et al.
patent: 5537112 (1996-07-01), Tsang

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