US Patent No. 9,443,528

METHOD AND DEVICE FOR ELIMINATING ECHOES


Patent No. 9,443,528
Issue Date September 13, 2016
Title Method And Device For Eliminating Echoes
Inventorship Xingbo Li, Shenzhen (CN)
Faguo Xu, Shenzhen (CN)
Ting Liu, Shenzhen (CN)
Qing Ma, Shenzhen (CN)
Xiaoliang Li, Shenzhen (CN)
Assignee ZTE Corporation, Shenzhen, Guangdong Province (CN)

Claim of US Patent No. 9,443,528

1. A method for eliminating echoes, comprising:
estimating at least one echo path characteristic parameter of an echo signal, wherein estimating the at least one echo path
characteristic parameter of the echo signal comprises:

obtaining a time delay of an echo signal in the speech signal to be processed;
obtaining a power error between a power of the speech signal to be processed at a previous moment and a power of the speech
signal to be processed at a current moment; and

estimating the at least one echo path characteristic parameter of the echo signal according to the time delay and the power
error;

taking a source signal of the echo signal as a reference signal, and generating an echo estimation signal according to the
at least one echo path characteristic parameter; and

subtracting the echo estimation signal from a speech signal to be processed.