RLL (1,7) encoder with single state bit

Details RLL (1,7) encoder with single state bit RLL (1,7) encoder with single state bit

1986-06-23

1987-08-04

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

360 40, H03M 700

Patent

active

046849211

ABSTRACT:
An apparatus for producing, from four consecutive unconstrained data bits in a bit string, a run-length-limited (RLL) encoded symbol consisting of three coded data bits. The internal state of the encoder is described by one state bit. The encoder performs RLL (1,7) encoding on a bit-by-bit basis, and can be cascaded in parallel to perform encoding on sequential, equally-sized groups of unencoded data bits. An attractive feature of the encoder is that it can be cascaded to simultaneously encode consecutive bytes of data.

REFERENCES:
patent: 3685033 (1972-08-01), Srivastava et al.
patent: 4115768 (1978-09-01), Eggenberger et al.
patent: 4337458 (1982-06-01), Cohn
patent: 4413251 (1983-11-01), Adler et al.
patent: 4488142 (1984-12-01), Franaszek
Erickson, "IBM Technical Disclosure Bulletin", vol. 21, No. 2, Jul. 1978, pp. 807-808.
Co-Pending, Related Patent Application Serial No. 745,242, filed Jun. 13, 1985.

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