Modulation apparatus and method, and DSV-control-bit...

Details Modulation apparatus and method, and DSV-control-bit... Modulation apparatus and method, and DSV-control-bit...

2005-10-25

2005-10-25

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

C341S067000

Reexamination Certificate

active

06958713

ABSTRACT:
A modulation apparatus and method for more accurately determining a value of a control bit to be inserted into a data sequence and digital sum value (DSV) control bit generating method in which a data conversion unit supplies modulation-delimiter information including information regarding delimiters of modulation of a data sequence based on a conversion table to a modulation-delimiter detecting unit and supplies to a valid-delimiter detecting unit a DSV-segment-delimiter signal including information regarding a delimiter position of a DSV segment of the data sequence having the DSV control bit. The modulation-delimiter detecting unit detects modulation-delimiter positions based on the modulation-delimiter information supplied thereto and supplies a modulation-delimiter signal to the valid-delimiter detecting unit. The valid-delimiter detecting unit, based on the DSV-segment-delimiter signal supplied thereto, detects a valid-delimiter position for controlling timing for determining a DSV control bit of the relevant DSV segment from the modulation-delimiter positions represented by the modulation-delimiter signal supplied thereto.

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