| 摘要 |
<p>A method and system for limiting gain control adaptation to a near-end audio signal using echo cancellation information is disclosed. The system includes an echo canceller (100) and an automatic gain controller (AGC) (600). The echo canceller (100) includes a non-linear processor (104) which determines echo state information of the echo canceller. The AGC (100) includes an AGC analyzing unit (601) and an AGC processing unit (603). The AGC analyzing unit (601) analyzes signal level information of the near-end audio signal (122) received by the echo canceller (100). The AGC processing unit (603) determines a gain adaptation for the near-end audio signal (122) based on the signal level information and prevents upward gain adaptation to the received near-end audio signal (122) when said echo state information indicates that the received near-end audio signal (122) contains an echo signal.</p> |
