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. 08, 2022
Filed:
Jul. 06, 2018
Sony Corporation, Tokyo, JP;
Kazuya Tateishi, Tokyo, JP;
SONY CORPORATION, Tokyo, JP;
Abstract
Provided are an audio processing device, an audio processing method, an information processing device, and a computer program that perform echo cancellation corresponding to double talk. The audio processing device includes an estimation unit that estimates a filter representing a transmission characteristic from a speaker where a reference signal is output to a microphone in which the reference signal sneaks, an adjustment unit that adjusts a step size on the basis of a filter update coefficient estimated by the estimation unit, and an update unit that updates the filter according to the update coefficient and the step size. The adjustment unit adjusts the step size on the basis of a ratio of power of the filter update coefficient to maximum power of the filter.