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:
Mar. 13, 2007
Filed:
Feb. 16, 2001
Frederique Ehrmann, Rennes, FR;
Frederique Ehrmann, Rennes, FR;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An original information sequence is encoded by a use of an error correcting code. There is associated with the encoded sequence K frequency symbols in a space consisting of a series of 2increasing frequencies, each of the K symbols representing N encoded symbols, with p, K and N being strictly positive integers. There is applied to the K symbols a reversible transformation including a multiplication by an invertible matrix of size N×N, and signals obtained from the inverse transform signals are sent. There exists a K-tuplet of positive integers n, n, . . . , nat least one of which is strictly positive, such that, for an integer I varying from 1 to K, after periodic extraction of one frequency out of 2among the frequencies of the iof the K symbols, thus forming a reduced frequency symbol of 2frequencies, K reduced frequency symbols are obtained, representing the original information sequence, with a view to complete or partial decoding.