Introduction to Adaptive Echo Cancellers

This paper presents a basic acoustic echo canceller based on the least mean square (LMS) algorithm. Acoustic echo cancellers are essential in many modern communication products. Do you ever hear your own voice when you talk on the telephone? This is an example of an acoustic echo. Acoustic echo is a common problem caused by audio signals bouncing off nearby objects and coupling into the microphone, which is supposed to pick up only your voice, or due to direct coupling between the speaker and the microphone (e.g., cell phones). If these effects are not eliminated, the entire communication system can be very annoying!

WilliamDecember 12, 2024