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:
Mar. 12, 2019
Filed:
Apr. 30, 2014
Motorola Solutions, Inc, Chicago, IL (US);
Jian Han, Chengdu, CN;
Charles H Carter, Sunrise, FL (US);
Jesus F Corretjer, Weston, FL (US);
Meng-Ge Duan, Chengdu, CN;
Yi Gao, Chengdu, CN;
Cheah Heng Tan, Penang, MY;
MOTOROLA SOLUTIONS, INC., Chicago, IL (US);
Abstract
A method and apparatus for distinguishing voice signals that are played together over the same speaker employs spectral reshaping of one or more of the audio signals. The spectral reshaping shifts modifies the timber of the voice signal while not modifying the pitch of the voice signal. Additional techniques can be used to further distinguish voice signals, such as dynamic gain offset and frequency shifting. After processing one or more signals to spectrally reshape them, they can be played over the same speaker. A user hearing the resulting acoustic signal will be more able to distinguish between the multiple voice signals being played.