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:
Jan. 25, 2011
Filed:
Oct. 01, 2008
Ryoichi Kawada, Saitama, JP;
Atsushi Koike, Saitama, JP;
Masahiro Wada, Saitama, JP;
Shuichi Matsumoto, Saitama, JP;
Ryoichi Kawada, Saitama, JP;
Atsushi Koike, Saitama, JP;
Masahiro Wada, Saitama, JP;
Shuichi Matsumoto, Saitama, JP;
KDDI Corporation, Tokyo, JP;
Abstract
Characteristic amounts in each small region of audio signals transmitted in the working system and the standby system are extracted by characteristic amount calculators--. A characteristic amount comparatorcompares the characteristic amounts and judges occurrence of fault of a fault. Characteristic amount difference calculators--, ∥D∥ comparator, and faulty system judging unitjudges the system having a fault. Majority decision processorand significance judging unitenhance the reliability of the judgement. Delay difference of audio signals between systems is roughly detected by sub-sampling audio signals of two systems and comparing them, and then accurately detected without sub-sampling. Delay difference between audio signals is adjusted by the detected delay difference.