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. 15, 2016
Filed:
Mar. 29, 2012
Tomoharu Awano, Tokyo, JP;
Atsuyoshi Yano, Tokyo, JP;
Bunkei Matsuoka, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An echo canceler includes a signal-to-echo ratio calculating unitand a residual echo suppressing unit. The signal-to-echo ratio calculating unitcomputes a signal-to-echo ratio SE(n) indicating a ratio of an echo component to a received signal x(n) from a first residual signal and a second residual signal. The first residual signal is obtained using a filter coefficient sequence of an update filter, which is obtained up to the previous operation. The second residual signal is obtained using an updated filter coefficient sequence that undergoes a coefficient update which is performed, using an arbitrary update step size μ(n), on the filter coefficient sequence of the update filter, which is obtained up to the previous operation. The residual echo suppressing unitsuppresses the echo component contained in the microphone input signal in accordance with the signal-to-echo ratio the signal-to-echo ratio calculating unitcomputes.