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:
Sep. 01, 2020
Filed:
Nov. 18, 2019
Yamaha Corporation, Hamamatsu-shi, JP;
Mitsutaka Goto, Hamamatsu, JP;
Kazuhiro Yanaike, Hamamatsu, JP;
YAMAHA CORPORATION, Hamamatsu-Shi, JP;
Abstract
An audio processing device includes: a signal processing circuit configured to select between a first state for outputting a first signal obtained by reducing components that fall below a first frequency in an audio signal and a second state for outputting a second signal obtained by reducing components that fall below a second frequency in the audio signal, and output one of the selected first or second signal as an output signal, where the second frequency is higher than the first frequency; a class-D amplifier that amplifies the output signal; a processor configured to: determine whether or not an intensity of a low-frequency component in the audio signal exceeds a threshold value; and control the signal processing circuit to select: the first state in a case where a determination result is negative, where the intensity of the low-frequency component in the audio signal is determined to not exceed the threshold value; and the second state in a case where the determination result is affirmative, where the intensity of the low-frequency component in the audio signal is determined to exceed the threshold value.