| 摘要 |
<p>The invention relates to a non-linear signal processing in an echo canceller. According to the invention, the level of the signals passing through the echo canceller from the near end to the far end is attenuated to a predetermined blocking level, when the level of the near end signals is lower than a given threshold level. The level of the signal passing through the echo canceller from the near end to the far end is raised in a ramp-like manner from said blocking level back to the normal level (TSUP), when the level (LSin) of the near end signals agains exceeds the given threshold level or in a double talk situation.</p> |
