ECHO REMOVAL

摘要

Echo removal techniques are described. As part of the echo removal, a first model estimate of the echo in the received audio signal is determined using a first model and a second model estimate of the echo is determined using a second model. A first accuracy value of the first model is determined according to a model accuracy measure, and a second accuracy value of the second model is determined according to the model accuracy measure. It is then determined if the first model is more accurate than the second model based on a comparison of the first accuracy value and the second accuracy value and the second model is selectively updated based on said comparison. Echo removal is applied to the received audio signal using only the second model estimate of the echo.

主权项

1. A method of removing echo, the method comprising:
outputting an audio signal; receiving an audio signal, wherein the received audio signal includes echo resulting from said outputted audio signal; determining a first model estimate of the echo in the received audio signal using a first model based on the outputted audio signal and the received audio signal; determining a second model estimate of the echo in the received audio signal using a second model based on the outputted audio signal; determining a first accuracy value of the first model according to a model accuracy measure; determining a second accuracy value of the second model according to the model accuracy measure; determining if the first model is more accurate than the second model based on a comparison of the first accuracy value and the second accuracy value and selectively updating the second model based on said comparison; and using only the second model estimate of the echo to remove the echo in the received audio signal.