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. 08, 2016
Filed:
Mar. 15, 2012
Tao Xue, Shenzhen, CN;
Tao Sun, Shenzhen, CN;
Dongmei Liu, Shenzhen, CN;
Jinjun Wang, Shenzhen, CN;
Qi Zhang, Shenzhen, CN;
Xia Wang, Shenzhen, CN;
Tao Xue, Shenzhen, CN;
Tao Sun, Shenzhen, CN;
Dongmei Liu, Shenzhen, CN;
Jinjun Wang, Shenzhen, CN;
Qi Zhang, Shenzhen, CN;
Xia Wang, Shenzhen, CN;
ZTE Corporation, Shenzhen, Guangdong, CN;
Abstract
An echo canceller and an echo cancellation method are provided. The echo canceller includes a self-adaptive filter, a voice signal detection portion and a path change detection portion; a far-end voice signal is propagated in an echo path through a speaker and is picked up by a microphone to form an echo signal. The self-adaptive filter is configured to receive the far-end voice signal as a training signal to simulate the echo path, and cancel the echo signal in a near-end signal. The voice signal detection portion is configured to detect a communication status, control the self-adaptive filter according to the communication status, and control startup of the path change detection portion according to the communication status. The path change detection portion is configured to detect whether a change occurs on the echo path, and control the self-adaptive filter according to whether the change occurs on the echo path.