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:
Aug. 31, 2021
Filed:
Mar. 25, 2020
Realtek Semiconductor Corp., HsinChu, TW;
Chun-Ming Cho, Hsinchu, TW;
Wei-Hung He, Hsinchu, TW;
Realtek Semiconductor Corp., HsinChu, TW;
Abstract
An active noise cancellation (ANC) circuit includes: an audio generating circuit; an audio input unit for transmitting an audio to be broadcast or a sound testing signal as a first time domain signal; an audio receiver for receiving a background sound as a second time domain signal, wherein the background sound corresponds to the audio to be broadcasted or the sound testing signal; and a channel estimation unit, configured to receive the first time domain signal and the second time domain signal, perform time-frequency conversion upon the first time domain signal and the second time domain signal to obtain a first frequency domain signal and a second frequency domain signal respectively, and generate a frequency response according to the first frequency domain signal and the second frequency domain signal. The frequency response is for adjusting an active noise cancelling coefficient of the ANC circuit to improve a noise cancellation effect.