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:
Feb. 20, 2007
Filed:
Jan. 13, 2003
Satoshi Furuta, Kato, JP;
Katsuhiko Fukuda, Kato, JP;
Akihiro Itakura, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An information recording and reproduction apparatus has a turbo decoder that decodes turbo encoded data. The turbo decoder has a number of likelihood ratio calculation units, forward direction path probability calculation units the number of which is less than the number of the likelihood ratio calculation units, and backward direction path probability calculation units the number of which is less than the number of the likelihood ratio calculation units. The likelihood ratio calculation units calculate in parallel the likelihood ratio for each of a plurality of data blocks. The forward direction path probability calculation units time-divisionally calculate probabilities of the forward direction paths for the data blocks. The backward direction path probability calculation units time-divisionally calculate probabilities of the backward direction paths for the data blocks.