An Algorithm for Cancellation of Sidetone Oscillations
نویسندگان
چکیده
An algorithm for detection and cancellation of sidetone oscillations in mobile phones is presented. The sidetone signal is represented by a 4 order LPC polynomial, whose root structure is analysed by a computationally efficient twostage approach. In difference to LMS based adaptive filters this approach offers a fast and reliable detection of evolving oscillations. A notch filter with small bandwidth is used for cancellation and therefore almost no distortion is introduced to the speech signal.
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تاریخ انتشار 2003