echo problem in audio/video chat application

I 开发者_开发知识库am making an audio/video chat application, i am using Flex, Flash Media Server 3.5, Flash Player 10, and I am facing the problem of echo very frequently. I am using a headset for audio recording.

Acoustic Echo Cancellation (AEC) is a particularly tricky problem in telephony, audio/video-conferencing, etc. Even if you're using a headset at your end you can still get echo via the remote end. You need an AEC module in your application otherwise you will need to ensure that both ends always use headsets. Unfortunately AEC is quite hard to implement - you can do something crude with an adaptive LMS filter but really good AEC tends to only be available as a licensable commercial solution.