Patent ID: 9191519
Filing Date: 2015-11-17
Classification: H04B,H04M

Abstract:
1. An echo suppressor apparatus comprising: a far-end signal amplitude spectrum calculator converting a far-end output signal into a frequency domain and calculating a far-end output signal amplitude spectrum of the far-end output signal; a near-end input signal amplitude spectrum calculator converting a near-end input signal into a frequency domain and calculating a near-end input signal amplitude spectrum of the near-end input signal; a frequency bin component detector using the far-end output signal amplitude spectrum to determine whether or not there is a frequency component in each of a plurality of frequency bins of the frequency domain of the far-end output signal; a frequency bin echo path characteristic estimator using both a far-end output signal amplitude spectrum of each determined frequency bin among said plurality of frequency bins determined to have a frequency component by said frequency bin component detector and a near-end input signal amplitude spectrum of a corresponding frequency bin of the near-end input signal, to estimate an echo path characteristic of said each determined frequency bin; an estimated-echo signal calculator calculating an estimated echo signal from the echo path characteristic for said each determined frequency bin; and an echo suppressor suppressing the estimated echo signal from the near-end input signal amplitude spectrum.