Residual echo elimination with proportionate noise injection

With equal subtract and anticipated echo adaptive convolution processing echo annihilator, a connection and transmitting have misalignment in processor and a signal. The processor response averaging value; the continuous range, substrate-processing the function attenuated error signal and is received signal measurement. For determining of the middle threshold noise layer, a noise injection device to transmit the output end, a error of attenuation pour into analogue noise signal in opposite ratio, is threshold and a maximum value. Error signal (a command signal and light attenuation and output layer and gradually placed the middle A/D layer of input, a echo annihilator operation a far-end listener an obvious.