Coded data generation or conversion – Stochastic techniques
Patent
1989-11-09
1990-12-18
Shoop, Jr., William M.
Coded data generation or conversion
Stochastic techniques
371 391, 360 39, 341 94, H03N 726
Patent
active
049789554
ABSTRACT:
A circuit for randomizing data or de-randomzing previously randomized data according to a randomization scheme utilizing an irreducible generator polynomial which operates on a serial bit stream of words of data which is supplied to said circuit in a format, either LSB or MSB first, different from the format according to which the data was previously randomized or will be subsequently de-randomized. The circuit includes means for generating said irreducible generator polynomial; means for triggering said generating means in a given direction in response to a clock signal; means for exclusively ORing the contents of a bit in said generating means with a bit in said bit stream; and means for periodically interrupting said triggering means and instead setting the state of said generating means a predetermined number of states in a direction effectively the opposite to which said generating means normally generates data.
REFERENCES:
patent: 3465287 (1969-09-01), Kennedy et al.
patent: 4462052 (1984-07-01), Kaplinsky
patent: 4698813 (1987-10-01), Erdel
patent: 4771429 (1988-09-01), Davis et al.
Archive Corporation
Berg Richard P.
Hoff Marc S.
Shoop Jr. William M.
Valet E. H.
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