An echo canceller in a system, having a long impulse response such as in an acoustic system, which employs a fast Fourier transform to transform input data represented in the time domain into signals represented in the frequency domain to reduce calculations. To solve the problem of a long delay, the...http://www.google.fr/patents/US4951269?utm_source=gb-gplus-shareBrevet US4951269 - Echo canceller with short processing delay and decreased multiplication number
Echo canceller with short processing delay and decreased multiplication number
