Patent ID: 8811627

Claim:
An echo suppressing method comprising: determining a plurality of crosstalk coefficients, each crosstalk coefficient of the plurality of crosstalk coefficients being a constant value; determining a use condition; selecting a crosstalk coefficient, from the plurality of crosstalk coefficients, based on the determined use condition; using a signal that is transformed in a frequency domain from either an output signal of a sound pickup device or from a signal obtained by subtracting an output signal having an echo suppressed from the output signal of said sound pickup device as a first signal; using a signal that is transformed in a frequency domain from the output signal having an echo suppressed as a second signal; multiplying said second signal by the selected crosstalk coefficient; estimating the amount of echo contained in said first signal based on the multiplication result; and suppressing the echo component in said first signal by using the estimated amount of echo.