Digital modulation method

Details Digital modulation method Digital modulation method

1990-04-09

1991-01-29

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

341 55, H03M 700

Patent

active

049889990

ABSTRACT:
A digital modulation method for modulating 8-bit digital data into 14-bit digital modulation codes. The number of consecutive identical bits in a series of 14-bit digital modulation codes is restricted to 2-7. The absolute value of DSV at the end of each 14-bit digital modulation code is restricted to 2 or less, and the absolute value of DSV at each bit of any 14-bit digital modulation codes is limited to 7 or less. The direct current component of the 14-bit modulation codes can be effectively reduced.

REFERENCES:
patent: 4760378 (1988-07-01), Iketani et al.
patent: 4833471 (1989-05-01), Tokuume et al.

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