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Method and system for echo detection

An echo detection and echo technology, which is applied in two-way sound reinforcement telephone systems, speech analysis, interconnection devices, etc., and can solve problems such as echoes

Active Publication Date: 2021-10-15
GOOGLE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Echoes may be generated due to various factors such as the proximity of the peripheral or the quality of the peripheral

Method used

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  • Method and system for echo detection
  • Method and system for echo detection
  • Method and system for echo detection

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 is an example of an echo detection system 100 . The echo detection system 100 generally includes a signal source 110 , an audio playback device 120 , a microphone 130 and an echo detector 200 . Echo detection system 100 is an environment in which user 10 receives playback audio 122 from audio playback device 120 (eg, a speaker) and microphone 130 receives a modified version of playback audio 122 as an echo. Microphone 130 is configured to capture speech 12 or other audible sounds generated by user 10, which may result in echoes being captured. For example, in a conversation between a first user 10 and a second user using a real-time communication (RTC) application, the second user in conversation with the first user 10 may then receive audio containing echoes and captured speech 12, and Played audio 122 including echoes from a second user's system (eg, signal source 110 ) may be provided to the first user 10 . In this case, the echoes received by either user...

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Abstract

The method (400) includes receiving a microphone audio signal (132) and playing the audio signal (112), and determining (324) a frequency representation of the microphone audio signal and a frequency representation of the playing audio signal. For each frequency representation, the method also includes determining frequency representation-based features (302). Each feature corresponds to a frequency pair (342) represented by the frequency and a time period between the pair of frequencies. The method also includes: determining whether a match occurs between a first feature based on the frequency representation of the microphone audio signal and a second feature based on the frequency representation of the playback audio signal (212); Whether the delay value (222) of corresponds to an echo within the microphone audio signal.

Description

technical field [0001] The present invention relates to echo detection. Background technique [0002] These peripherals can be affected by acoustic echoes when the audio system captures and sends audio. Acoustic echo typically occurs when an audible signal generated by an audio playback device (such as a speaker) travels in the form of a sound wave through an acoustic environment (such as air) and a modified version of that wave reflects back to a microphone. Another form of echo is electrical echo, which occurs due to poor electrical coupling effects between an audio playback device (such as a speaker) and a microphone. The signal generated by this echo path is then sent as an audio echo. Echoes may be generated due to various factors, such as the proximity of the peripheral or the quality of the peripheral. [0003] Echoing negatively impacts user experience when it occurs within a session such as a real-time communication (RTC) using a software application. Although e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M9/08
CPCG10L21/0208H04M9/082G10L2021/02082
Inventor 亚历山大·洛伊科马库斯·怀尔布兰德塞缪尔·马丁·扎克里森伊沃·克卢森芒·古斯塔夫·塞巴斯蒂安 乌尔贝格丹尼尔·约翰逊阿莱西奥·巴兹卡
Owner GOOGLE LLC