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:
Nov. 09, 1999
Filed:
Feb. 11, 1997
Izumi Hatakeyama, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A viterbi decoder that performs viterbi decoding at a high speed with low power consumption using a memory such as a random access memory as a path selection information storage unit. Adder-comparator-selector (ACS) processing units 13a, 13b time-divisionally perform ACS processing for even and odd number states, respectively, based on the branch metrics from a branch metric computing unit 12 and the path metric of the previous period to produce the path selection information. Eight states of the path selection information storage are collected together by a temporary storage circuit 20 and sent to and written in a path selection information storage unit 15. In the path selection information storage unit 15, the past path selection information is read out during the time other than a write time for the path selection information. The path selection information corresponding to the maximum likelihood states of the path selection information in the path selection information storage unit 15 is read out during the time the ACS processing is performed for all states.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile