ECHO SUPPRESSION FOR WIRELESS HANDSETS AND HEADSETS

摘要

The enhancements provided herein are designed to allow an acoustic echo suppressor algorithm to operate with significant echo path delay between an audio block R in and audio block S in. In one illustration, a single reference sample or envelope value can be taken from the received audio block R in. Through an algorithm, echo signals can be suppressed and/or masked from audio block S in by delaying the previously captured reference sample and aligning the delayed reference sample with multiple samples of the audio block S in. Instead of each individual reference sample being matched with an individual sample of the audio block S in, a single captured and delayed reference sample or envelope value can be matched with multiple samples of audio block S in. The algorithm presented improves voice quality on a telephone call while reducing buffer requirements.