| 摘要 |
PROBLEM TO BE SOLVED: To provide an echo suppression device capable of suppressing echo stably regardless of the amount of delay or frame processing.SOLUTION: An echo suppression device for suppressing an acoustic echo signal based on a far-end output signal from a near-end input signal includes: means for obtaining an estimation echo signal, in unit of frame, by multiplying the estimation echo path characteristics and the far-end output signal and holding the estimation echo signal; means for obtaining the error of the near-end input signal and the estimation echo signal thus held, and obtaining a frame of minimum error; means for obtaining the estimation echo signal while correcting by using the frame of minimum error, and a plurality of frames before and after the frame; and means for suppressing the acoustic echo signal from the near-end input signal, by using the estimation echo signal thus obtained. |
