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. 19, 2019
Filed:
Jun. 16, 2014
Applicant:
Nec Corporation, Tokyo, JP;
Inventor:
Akihiko Sugiyama, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 17/00 (2006.01); G10L 25/78 (2013.01); A61B 5/0456 (2006.01); A61B 5/04 (2006.01); A61B 5/00 (2006.01); G10L 21/0232 (2013.01); G10L 25/27 (2013.01);
U.S. Cl.
CPC ...
G10L 25/78 (2013.01); A61B 5/04014 (2013.01); A61B 5/0456 (2013.01); A61B 5/7257 (2013.01); G10L 21/0232 (2013.01); G10L 25/27 (2013.01);
Abstract
This invention enables to effectively detect an abrupt change in a signal. The signal processing apparatus includes a converter that converts an input signal into a phase component signal in a frequency domain, a first calculator that calculates a first phase gradient as a gradient of the phase of the phase component signal, a second calculator that calculates a second phase gradient using the first phase gradients at a plurality of frequencies, and a determiner that determines existability concerning an abrupt change in the input signal based on the first phase gradients and the second phase gradient.