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:
Apr. 20, 2021
Filed:
Nov. 15, 2019
Yamaha Corporation, Hamamatsu, JP;
Mitsutaka Goto, Hamamatsu, JP;
Kazuhiro Yanaike, Hamamatsu, JP;
YAMAHA CORPORATION, Hamamatsu, JP;
Abstract
An audio processing device includes: at least one processor configured to: generate a first signal by reducing components that fall below a first frequency in an audio signal; generate a second signal by reducing components that fall below a second frequency that is higher than the first frequency in the audio signal; select between a first state for outputting the first signal and a second state for outputting the second signal; and output one of the selected first or second signal as an output signal; and a class-D amplifier configured to amplify the output signal, in which, the at least one processor is further configured to: determine whether or not a power supply pumping phenomenon exists or a possibility of the power supply pumping phenomenon exists, in a power source that supplies a power supply voltage to the class-D amplifier; and in which, in the selecting between the first state and the second state, the at least one processor is configured to select: the first state in a case where a determination result is negative, where the power supply pumping phenomenon is determined to not exist or the possibility of the power supply pumping phenomenon is determined to not exist; and the second state in a case where the determination result is affirmative, where the power supply pumping phenomenon is determined to exist or the possibility of the power supply pumping phenomenon is determined to exist.