Coded data generation or conversion – Digital code to digital code converters – To or from minimum d.c. level codes
Reexamination Certificate
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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Nakagawa Toshiyuki
Okamura Hiroshige
Tobita Minoru
Maioli Jay H.
Sony Corporation
Wamsley Patrick
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