A Proposal of Echo Canceller using Blind Signal Separation method

Abstract

In a teleconference system, a cause of deterioration for sound quality is echo signals. A convectional echo canceller had to stop updating parameters during the double talk. So, the reliability of transmitted signals deteriorate during the double talk. Therefore, blind signal separation (BSS) method is the method that is suitable for echo cancellers, because the method doesn't need to stop updating parameters during double talk. However, it is difficult to directly apply, because BSS method has two faults. So we solve these faults by using system structure of the echo canceller. As the result, we can apply BSS method to echo canceller. And, it has a higher reliability of transmitted signals.