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Method and device for eliminating echo of receiver from opposite side in handfree state of mobile phone

A mobile phone and peer technology, which is applied to two-way sound reinforcement telephone systems, branch equipment, electrical components, etc., can solve the problems of complicated echo cancellation process, and achieve the effect of simple and practical method, improving call quality, and eliminating echoes.

Active Publication Date: 2013-11-20
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the echo cancellation process of this patent is more complicated

Method used

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  • Method and device for eliminating echo of receiver from opposite side in handfree state of mobile phone
  • Method and device for eliminating echo of receiver from opposite side in handfree state of mobile phone

Examples

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Embodiment 1

[0030] Embodiment 1 of the present invention provides a method for eliminating the echo of the earpiece of the other party in the hands-free state of the mobile phone. The embodiment will be described in detail below with reference to the accompanying drawings.

[0031] figure 1 It is a flow chart of the method of Embodiment 1 of the present invention, refer to figure 1 , the method of the embodiment of the present invention includes the following steps:

[0032] Step 101, turn on the hands-free mode of the mobile phone;

[0033] Step 102, collecting the sound signal transmitted by the other party;

[0034] Step 103, performing an inversion operation on the collected sound signal transmitted from the other party;

[0035] Further, step 103 specifically includes;

[0036] Invert the level of the collected sound signal transmitted by the other party, and change the level of the positive sound signal into the level of the negative sound signal or the level of the negative sou...

Embodiment 2

[0046] The second embodiment provides a device for eliminating the echo of the other party's earpiece in the hands-free state of the mobile phone, such as figure 2 As shown, the device includes:

[0047] The first collection module 201 is used to collect the sound signal transmitted by the other party when the mobile phone of one's own party turns on the hands-free mode;

[0048] An inversion operation module 202, configured to perform an inversion operation on the sound signal transmitted by the other party collected by the first acquisition module 201;

[0049] The second collection module 203 is used to collect the sound signal of the microphone of one's own mobile phone;

[0050]The superimposition processing module 204 is used for superimposing the sound signal transmitted by the other party after the inversion operation by the inversion operation module 202 and the sound signal of the mobile phone microphone of one's own party collected by the second collection module ...

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Abstract

The invention discloses a method for eliminating the echo of a receiver from an opposite side in a handfree state of a mobile phone. The method comprises the following steps of acquiring a sound signal transmitted from the opposite side when the handfree mode in the mobile phone of one side is opened; reversely operating the acquired sound signal transmitted from the opposite side; acquiring a sound signal of the receiver of the mobile phone from the one side; carrying out overlay processing on the sound signal, transmitted from the opposite side and subjected to the reversed operation, and the sound signal of the receiver of the mobile phone from the one side. The method disclosed by the invention is simple and practical; the echo of the receiver from the opposite side is eliminated by reversed operation and overplay processing on the sound signal, so that the call quality of two sides for communication is improved. In addition, the invention also discloses a device for eliminating the echo of the receiver from the opposite side in the handfree state of the mobile phone.

Description

technical field [0001] The present invention relates to the technical field of communication equipment, and more specifically, relates to a method and a device for eliminating the echo of an earpiece of a mobile phone in a hands-free state. Background technique [0002] At present, most of the existing mobile communication devices support a hands-free (hands-free) mode, for example, a mobile phone. Hands-free cell phones allow users to talk while driving or exercising without holding the handset's microphone to the ear. However, the communication of mobile phones in the hands-free state is often accompanied by echo problems. After the signal at the receiving end is played by the receiver (also known as the receiver, receiver, SPK or earphone, etc.), it is serially transmitted to the sending end (also known as the receiver) through the line and acoustic reflection. It is called a microphone or a microphone, etc.) and feeds it to the far end, so that the communication contact...

Claims

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Application Information

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IPC IPC(8): H04M9/08H04M1/725
Inventor 曾元清李孟
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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