| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an echo canceller and an echo cancellation method capable of performing suitable echo cancellation while limiting the amount of computation even in a situation where the echo state is likely to change. <P>SOLUTION: The difference of the magnitude between the signal component of an input near-end audio-signal and the signal component of an echo attenuation audio-signal to be output toward the far-end side is calculated as an echo attenuation. Subsequently, the long term average attenuation and the short term average attenuation are calculated for the echo attenuation, and the buffer delay is changed for the input near-end audio-signal according to the calculation result. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
