Method for removing echo in radio earphone communication

A wireless earphone and echo technology, applied in the field of echo cancellation, can solve the problems of high cost and complex technology, and achieve the effect of easy implementation, simple principle and good echo cancellation effect.

Inactive Publication Date: 2010-04-21
MICROLINK COMM
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, bluetooth earphone chips integrated with DSP function have been widely used. This kind of chip has a good echo cancellation effect, but its technology is complicated, and the echo cancellation function needs to be realized through the cooperation of software and hardware, so that this kind of bluetooth Bud earphone chips are quite expensive and usually only available in high-end Bluetooth earphone products

Method used

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  • Method for removing echo in radio earphone communication
  • Method for removing echo in radio earphone communication

Examples

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Embodiment Construction

[0013] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following examples are given to illustrate the embodiments with accompanying drawings in detail.

[0014] In order to make the present invention easier to understand, this embodiment takes the Bluetooth earphone as an example, and introduces the elimination method of the short echo and the long echo in the Bluetooth earphone communication to reflect the echo elimination method in the wireless earphone communication of the present invention.

[0015] This embodiment is aimed at eliminating the most obvious short-echo and long-echo in Bluetooth headset communication, so two electronic circuits are used to simulate the actual short-echo transmission characteristics and long-echo transmission characteristics respectively. The two electronic circuits are used to delay and modulate the branch signal of the received signal of the Bluetooth earphone...

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Abstract

This invention discloses a method for eliminating echo in radio earphone communication including: 1, carrying out time delay operation and amplitude modulation operation to at least two branch signalsof the received signals of the earphone so as to generate at least two forecast echo signals, the phase and amplitude of which are the same with those of two corresponding actual echo signals, 2, carrying out at least two times of wave-mixing operation to cancel the two actual echo signals mixed in the transmitted signals by the generated two forecast echo signals.

Description

technical field [0001] The invention relates to a method for eliminating echo, in particular to a method for eliminating echo in wireless earphone communication. Background technique [0002] Wireless earphones do not require signal lines between mobile phones and traditional earphones and microphones, making them more convenient to use and carry, and are increasingly favored by consumers. However, most of the common wireless earphones (such as bluetooth earphones) have relatively small volume, and the distance between the earpiece and the microphone is very short. Therefore, in actual communication, the sound waves emitted by the earphone are easily transmitted into the earphone microphone, and then transmitted back to the remote, making the remote feel the echo. [0003] Theoretically speaking, the sound waves emitted by the earphone receiver are transmitted into the microphone through multiple different echo paths, so multiple echoes will be generated correspondingly. H...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04M9/08
Inventor颜安佑
OwnerMICROLINK COMM