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:
Jun. 24, 2014
Filed:
Dec. 19, 2011
Noriaki Fujita, Chiba, JP;
Jun Matsumoto, Kanagawa, JP;
Noriaki Fujita, Chiba, JP;
Jun Matsumoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A sound processing apparatus includes: a sound output unit which outputs sound based on a first sound signal as first sound processing when execution of the first sound processing is instructed; a sound collecting unit which generates an echo signal by collecting surrounding sound; a filtering unit which performs filtering process with an adaptive digital filter on the first sound signal and generates a pseudo echo signal; a subtracting unit which removes a sound component, which is output from the sound output unit and reaches the sound collecting unit, from the echo signal by subtracting the pseudo echo signal from the echo signal to generate a residual signal; an updating unit which updates the adaptive digital filter based on the residual signal and the first sound signal; and an update resolution control unit which controls the resolution at which the adaptive digital filter is updated by the updating unit.