Digital modulation apparatus and digital modulation method

Details Digital modulation apparatus and digital modulation method Digital modulation apparatus and digital modulation method

2008-01-08

2008-01-08

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

C341S059000, C341S068000, C341S069000, C360S041000, C369S059230

Reexamination Certificate

active

10553215

ABSTRACT:
A digital modulation apparatus capable of generating a modulated code so that binary slice is correctly performed when reproducing is provided. To achieve this, in a digital modulation apparatus (10A), a DSV change amount calculator (15) calculates change amounts (ΔDSVa, ΔDSVb) in DSVs of candidate modulated codes (CODEa, CODEb) generated by a modulated code generator (11). A modulated code determinator (13) compares the change amounts (ΔDSVa, ΔDSVb), and determines that the candidate modulated code having a smaller absolute value should be selected as a modulated code (CODE). A modulated code selector (14) selects one of the candidate modulated codes (CODEa, CODEb) which is determined by the modulated code determinator (13), and outputs the selected code as a modulated code (CODE) for source data (DATA).

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