| 摘要 |
PROBLEM TO BE SOLVED: To provide an echo suppression device capable of estimating a delay amount and suppressing an acoustic echo signal, even if the same sound or a similar sound is inputted from a far-end side, without outputting a sound such as a pulse sound or a notification sound when estimating the delay amount of the acoustic echo signal.SOLUTION: The echo suppression device comprises: frame error calculation means which calculates a frame error on the basis of amplitude spectra of estimate echo signals of a plurality of frames in the past and amplitude spectra of near-end input signals; frame delay amount candidate value calculation means which calculate candidate values of one or more frame delay amounts on the basis of the error for each frame; and frame delay amount estimation means which estimates and outputs the frame delay amount, based on the candidate value of each of the frame delay amounts, by using the estimate echo signal of a frame that is separated from the delay amount candidate value by predetermined frames and the near-end input signal of a frame that is separated from a present frame by predetermined frames.SELECTED DRAWING: Figure 1 |
