Modulating apparatus and method, and DSV control bit...

Details Modulating apparatus and method, and DSV control bit... Modulating apparatus and method, and DSV control bit...

2005-09-27

2005-09-27

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

C341S059000

Reexamination Certificate

active

06950042

ABSTRACT:
The present invention relates to a modulation apparatus and method and a DSV-control-bit generating method for suppressing an increase in circuit size of the modulation apparatus. When an input data stream is supplied to a DSV control bit determination unit31, the DSV control bit determination unit31determines a DSV control bit to be inserted into the input data stream. Upon supplying the input data stream to the DSV control bit determination unit31, the input data stream is simultaneously supplied to a delay processor32. The input data stream is delayed for a predetermined delay time and supplied to a determined-DSV-control-bit insertion unit33. The determined-DSV-control-bit insertion unit33inserts the DSV control bit determined by the DSV control bit determination unit31into a predetermined position of the input data stream supplied by the delay means and supplies the input data stream containing the DSV control bit to a modulator34. The modulator34modulates the input data stream containing the DSV control bit into a code string in accordance with a predetermined coding rule (for example, 1,7PP modulation).

REFERENCES:
patent: 6072756 (2000-06-01), Shigenobu
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patent: 6359930 (2002-03-01), Nakagawa et al.
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patent: 2004/0125002 (2004-07-01), Nakagawa et al.
patent: 7-245565 (1995-09-01), None
patent: 8-149013 (1996-06-01), None
patent: 11-346154 (1999-12-01), None

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