Patent ID: 9154873
Filing Date: 2015-10-06
Classification: H04M,H04R

Abstract:
1. A method of suppressing 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; modelling an echo path of the echo in the received audio signal using a plurality of models, wherein a first of the models is a Finite Impulse Response based model, and wherein a second of the models is different to the first model; using the first model to determine a first model estimate of the echo power of at least a first component of the echo in the received audio signal; using the second model to determine a second model estimate of the echo power of at least a second component of the echo in the received audio signal; combining the first and second model estimates of the echo power to determine a combined estimate of the echo power of the echo in the received audio signal; and using the combined estimate of the echo power to apply echo suppression to the received audio signal, thereby suppressing the echo in the received audio signal.