Coded data generation or conversion – Digital code to digital code converters – To or from minimum d.c. level codes
Reexamination Certificate
2007-10-23
2007-10-23
Williams, Howard L. (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from minimum d.c. level codes
C360S040000
Reexamination Certificate
active
11166425
ABSTRACT:
A method and apparatus reduces a DC level of an input word. The input word is divided into a plurality of components that include n symbols. The n symbols of the components are summed for each component. The component is encoded into a substitute component if a sum for the component exceeds a threshold. The components having a sum that does exceed the threshold are combined with at least one substitute component into an output word. An output word template is selected based on a number of substitute components and on a position that the substitute components originally occupied in the input word. The substitute components are inserted in the output word template. The components that have a sum that does not exceed the threshold are inserted in the output word template. Address and indicator symbols are inserted in the output word.
REFERENCES:
patent: 4675650 (1987-06-01), Coppersmith et al.
patent: 4888779 (1989-12-01), Karabed et al.
patent: 5144304 (1992-09-01), McMahon et al.
patent: 5375249 (1994-12-01), Cho
patent: 5396239 (1995-03-01), McMahon et al.
patent: 5537424 (1996-07-01), Karabed et al.
patent: 5608397 (1997-03-01), Solkanin
patent: 5636033 (1997-06-01), Maeda
patent: 5757822 (1998-05-01), Fisher et al.
patent: 5910696 (1999-06-01), Kang
patent: 6018304 (2000-01-01), Bessios
patent: 6046691 (2000-04-01), Aziz et al.
patent: 6097320 (2000-08-01), Kuki et al.
patent: 6184806 (2001-02-01), Patapoutian et al.
patent: 6198413 (2001-03-01), Widmer
patent: 6204781 (2001-03-01), Aziz et al.
patent: 6297753 (2001-10-01), Hayami
patent: 6366223 (2002-04-01), Lee et al.
patent: 1058432 (2000-06-01), None
Nan-Hsiung Yeh, “Equivalence of Signal Processing in Perpendicular and Longitudinal Recordings” Digests of PMRC 2000, The Fifth Perpendicular Magnetic Recording Conference, (Sendai, Japan) Oct. 23-26, 2000, p. 231.
Marvell International Ltd.
Williams Howard L.
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