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:
Jan. 22, 2019
Filed:
Nov. 13, 2017
C-media Electronics Inc., Taipei, TW;
Po-Shu Lan, New Taipei, TW;
C-MEDIA ELECTRONICS INC., Taipei, TW;
Abstract
An active noise cancellation system for canceling noises within a predetermined bandwidth includes an analog-to-digital converter, a programmable noise-cancellation module, a first interpolation filter and a digital-to-analog converter. The analog-to-digital converter receives a first audio signal, and converts the first audio signal from an analog signal to a digital signal. The programmable noise-cancellation processes the first audio signal to generate a noise cancellation signal. The first interpolation filter receives a second audio signal and filters the second audio signal. The noise cancellation signal and the filtered second audio signal are integrated by an adder as a third audio signal, and then the digital-to-analog converter converts the third audio signal from a digital signal to an analog signal.