The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 1989
Filed:
Jan. 06, 1988
Robert E Peile, Pasadena, CA (US);
Earl T Cohen, Berkeley, CA (US);
Cyclotomics, Inc., Berkeley, CA (US);
Abstract
A block of helically interleaved codewords is received in a de-interleaving array. A succession of codewords obtained from the de-interleaving array are decoded in a process in which each error pattern in a given codeword position provides a prediction of the presence or absence of an erasure in the adjacent codeword position of the next codeword. This prediction is obtained by addressing a look-up table with the error pattern. In one embodiment of the invention, the erasure prediction is computed recursively from previous erasure predictions using individual skepticism factors and forgetting factors for each codeword symbol position.