Audio signal processing system and echo signal removing method thereof

摘要

An audio signal processing system and an echo signal removing method thereof are provided. The audio signal processing system includes a speaker that is configured to output an audio signal; a microphone that is configured to receive the audio signal output by the speaker including an echo signal generated by the audio signal; an echo signal delay unit that is configured to delay the echo signal for a bulk delay time, and output the echo signal that is delayed; and an echo signal removing unit that is configured to remove the echo signal that is delayed and output by the echo signal delay unit from the audio signal received by the microphone, wherein the echo signal delay unit includes a bulk delay measuring unit that is configured to measure a bulk delay by analyzing impulse response characteristics of an echo path.

主权项

1. An audio signal processing system comprising:
a speaker that is configured to output an audio signal; a microphone that is configured to receive the audio signal output by the speaker including an echo signal generated by the audio signal; an echo signal delay unit that is configured to delay the echo signal received through the microphone for a bulk delay time, and output the echo signal that is delayed; and an echo signal removing unit that is configured to remove the echo signal that is delayed and output by the echo signal delay unit from the audio signal received by the microphone, wherein the echo signal delay unit comprises a bulk delay measuring unit that is configured to measure a bulk delay by analyzing impulse response characteristics of an echo path, wherein the bulk delay measuring unit is configured to measure a period of time when the magnitude of the impulse response is within a predetermined threshold value, and wherein the predetermined threshold value is determined based on a shape of an initial peak of an impulse response.