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. 14, 2000
Filed:
Dec. 09, 1997
Antoine Chouly, Paris, FR;
David Gianella, Dannemarie, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
A digital transmission system wherein the transmitter applies a systematic convolutional code to the input data to generate a product code in blocks, with trellis closure by adding redundant data comprising a parity code bit. The thus coded data are then allocated to symbols that have undergone multidimensional digital modulation. At the receiver, iterative decoding is performed in cascade along two paths by computing hard decision reliabilities for each sub-set of the multidimensional digital modulation so as to produce soft decisions. The second path utilizes the results produced by the first path to form soft decisions. The soft decisions enable determination of output symbols. The invention also relates to a data protection method implemented in such a system.