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. 12, 2021
Filed:
Jul. 21, 2019
Guoguang Electric Company Limited, Guangzhou, CN;
Yuli You, Laguna Beach, CA (US);
Guoguang Electric Company Limited, Guangzhou, CN;
Abstract
Provided are, among other things, systems, methods and techniques for processing an audio signal to add virtual bass. In one representative embodiment, an apparatus includes: an input line that inputs an original audio signal; an estimator, coupled to the input line, that estimates a fundamental frequency of a bass sound within the original audio signal; a bass extraction filter, coupled to the input line, that extracts a bass portion of the original audio signal that is at least 1 octave wide and includes the fundamental frequency; a frequency translator, coupled to the bass extraction filter, that shifts the bass portion, in its entirety, by a positive frequency increment that is an integer multiple of the fundamental frequency estimated by the estimator, thereby providing a virtual bass signal; and an adder having 1) inputs coupled to the original audio signal and to the virtual bass signal and 2) an output.