Data modulation method

Details Data modulation method Data modulation method

1993-03-30

1995-11-21

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

341 95, H03M 700

Patent

active

054691621

ABSTRACT:
In a data modulation method, m-bit data is modulated to n-bit data (n.gtoreq.m) having fewer direct current and low frequency components. A dispersion of the digital sum variation of code weights can be reduced, a direct current component is reduced and an error rate can be further reduced by selecting a plurality of modulation tables constituting the combination of one or more sub-groups of modulation data obtained by dividing a group of modulation data by a code weight having the same value based on the digital sum variation of the code weights accumulated until a time at which m-bit data is converted to n-bit code and converting next m-bit data continuously to present m-bit data to n-bit code by using the modulation tables.

REFERENCES:
patent: 4490712 (1984-12-01), Gourdon et al.
patent: 4517552 (1985-05-01), Shirota et al.
patent: 5192949 (1993-03-01), Suzuki et al.
patent: 5196848 (1993-03-01), Sakazaki
patent: 5198813 (1993-03-01), Isozaki
patent: 5304996 (1994-04-01), Hsu et al.

Affiliated with

Also associated with

Rating

Data modulation method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data modulation method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data modulation method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1140765