| 摘要 |
An echo canceller including an adaptive filter receiving the coefficients of a direct discrete transform in the frequency domain, said coefficients being calculated over a series of blocks in an input signal, and driving, via an inverse transform circuit, the substractive input of an adder for forming an output signal to the network, and a filter coefficient adapting circuit. Said canceller is characterised in that the adapting circuit receives the coefficients of the series of transforms for the output signal sample blocks via a noise reducer. The adapting circuit receives the coefficients of the series of transforms for the output signal sample blocks via a noise reducer.
|
