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Apparatus and method for acoustic echo cancellation

A technology of acoustic echo cancellation and electro-acoustic, which is applied in the direction of interconnection device, microphone signal combination, two-way sound reinforcement telephone system, etc., and can solve the problem of large acoustic echo

Active Publication Date: 2019-11-08
KNOWLES ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Use of small speakers can lead to larger than usual non-linear components in the acoustic echo

Method used

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  • Apparatus and method for acoustic echo cancellation
  • Apparatus and method for acoustic echo cancellation
  • Apparatus and method for acoustic echo cancellation

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Embodiment Construction

[0014] The techniques disclosed herein relate to systems and methods for acoustic echo cancellation.

[0015] figure 1 is a block diagram illustrating an example system 100 for communication between audio devices. figure 1 An audio device 110 , an audio device 140 and an audio communication network 120 are included. The audio communication network 120 may transmit audio signals between the audio device 110 and the audio device 140 during a telephone conversation.

[0016] figure 2 is a block diagram of the audio device 110 and the audio device 140 according to an example embodiment. Audio device 110 may include a radio receiver 210 , a processor 220 , one or more microphones 230 , an audio processing system 240 and an output device 250 .

[0017] The radio receiver of the audio device 110 may be configured to receive audio signals from the audio communication network 120 . The audio signal may be forwarded to an audio processing system 240 for processing the audio signal...

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Abstract

Apparatus and methods for acoustic echo cancellation. Systems and methods for acoustic echo cancellation are provided. An example method includes receiving a reference signal. The reference signal is representative of at least one sound captured within the enclosure of the speaker. The loudspeaker is operable to playback the far-end signal. The method also includes receiving an acoustic signal. The acoustic signal represents at least one sound captured outside the enclosure of the speaker. The acoustic signal includes at least a near-end signal and a far-end signal. The method can use the reference signal to attenuate the far-end signal in the electro-acoustic signal. The reference signal can be captured by a low-sensitivity microphone placed inside the housing of the loudspeaker. Attenuation of the far-end signal may include subtractive cancellation.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 62 / 278,872, filed January 14, 2016, the contents of which are hereby incorporated by reference in their entirety. technical field [0003] The present invention relates to an acoustic echo cancellation reference signal, in particular to a device and method for acoustic echo cancellation. Background technique [0004] Acoustic echoes may occur during conversations over a communication network. The far-end signal entering the communication device can be played back through the speaker of the communication device. The microphone of the communication device can capture both the near-end signal and the output of the speaker. The mix of the near-end signal and the speaker's output can be transmitted back to the far-end so that the listener at the far-end receives a delayed version of his own speech as an "echo" sound. [0005] Conventional AEC techniques w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M9/08
CPCH04M9/082H04R1/2826H04R1/2834H04R3/005H04R3/02H04R3/04H04R29/001H04R2499/11
Inventor P·沙A·D·昂鲁
Owner KNOWLES ELECTRONICS INC