CN103402038A - Method and device for eliminating echo of receiver from opposite side in handfree state of mobile phone - Google Patents
Method and device for eliminating echo of receiver from opposite side in handfree state of mobile phone Download PDFInfo
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- CN103402038A CN103402038A CN2013103122665A CN201310312266A CN103402038A CN 103402038 A CN103402038 A CN 103402038A CN 2013103122665 A CN2013103122665 A CN 2013103122665A CN 201310312266 A CN201310312266 A CN 201310312266A CN 103402038 A CN103402038 A CN 103402038A
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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
The present invention relates to the communication equipment technical field, more particularly, relate to eliminate under a kind of Mobile phone hand-free state method and the device of the other side's receiver echo.
Background technology
At present, existing mobile communication equipment is supported hands-free (hands-free) pattern mostly, for example: mobile phone.Mobile phone with hand-free function can allow the user when driving or move, and not needing that the microphone of mobile phone is pressed close to ear can converse.Yet, mobile phone carries out communication often with the echo problem under hands-free state, after the callee signal is play by receiver (also referred to as receiver, receiver, SPK or earphone etc.), through circuit and acoustic reflection, seal in the reception signal that send words ends (also referred to as microphone or microphone etc.), and be fed to far-end, make the communication people of far-end hear echo.The echo meeting causes very big interference to both call sides, affects speech quality.
A kind of echo cancelling device for small-sized hands-free voice communication system and method are disclosed in Chinese invention patent application specification CN103051818A, this patent by taking full advantage of small-sized hands-free voice communication system acoustic characteristic and the positional information of transmitter and receiver, by different transmitter signals being carried out to general outline coupling and amplitude coupling, obtain amplitude coupling echo; Utilize echo to arrive the amplitude difference of different transmitters; because different transmitter signal amplitude difference is larger; the near-end speech probability is less; can extract indication voice and the echo ratio speech probability information in each time-frequency region; come in voice zone and echo area division, effectively remove residual echo, and the protection near-end speech; promote duplex capability, be not strict with the phase equalization of transmitter simultaneously.But the echo cancellation process of this patent is comparatively complicated.
Summary of the invention
The object of the invention is to overcome above-mentioned defect of the prior art, a kind of eliminate the echo of the other side's receiver under Mobile phone hand-free state method is provided, be intended to promote speech quality.
For achieving the above object, technical scheme provided by the invention is as follows: under a kind of Mobile phone hand-free state, eliminate the method for the other side's receiver echo, it comprises the following steps:
When one's own side's mobile phone open hands-free mode, gather the voice signal that the other side transmits;
The voice signal that the other side who collects is transmitted carries out inversion operation;
Gather the voice signal of one's own side's mobile phone microphone;
The voice signal that the other side after inversion operation is transmitted carries out overlap-add procedure with the voice signal of the one's own side's mobile phone microphone that collects.
Furthermore, the voice signal that transmits of described the other side that will the collect step of carrying out inversion operation specifically comprises;
The level of the voice signal that the other side who collects is transmitted carries out negate, and the level that the level of positive voice signal is become to the level of negative voice signal or negative voice signal becomes the level of positive voice signal, and absolute value is constant.
Furthermore, the voice signal of described one's own side's mobile phone microphone comprises one's own side's voice signal and one's own side's mobile phone is play under hands-free mode the other side's voice signal.
Furthermore, the voice signal of the described voice signal that the other side after inversion operation is transmitted and the one's own side's mobile phone microphone that collects carries out also comprising after the step of overlap-add procedure:
Voice signal after overlap-add procedure is sent to the other side's earpiece by cell phone network.
Another object of the present invention is to overcome above-mentioned defect of the prior art, the device of eliminating the echo of the other side's receiver under a kind of Mobile phone hand-free state is provided, technical scheme provided by the invention is as follows, and this device comprises:
The first acquisition module, for when one's own side's mobile phone open hands-free mode, gather the voice signal that the other side transmits;
The inversion operation module, the voice signal that transmits for the other side that described the first acquisition module is collected carries out inversion operation;
The second acquisition module, be used to gathering the voice signal of one's own side's mobile phone microphone;
The overlap-add procedure module, the voice signal of the one's own side's mobile phone microphone that collects for voice signal that the other side after described inversion operation module inversion operation is transmitted and described the second acquisition module carries out overlap-add procedure.
Furthermore, the voice signal of described one's own side's mobile phone microphone comprises one's own side's voice signal and one's own side's mobile phone is play under hands-free mode the other side's voice signal.
Furthermore, this device also comprises:
Sending module, for sending to the other side's earpiece by the voice signal after overlap-add procedure by cell phone network.
Compared with prior art, beneficial effect of the present invention is:
The present invention transmits by the other side that will collect under hands-free state voice signal carries out inversion operation and the voice signal of the other side after the inversion operation voice signal that transmits and the one's own side's mobile phone microphone that collects is carried out to overlap-add procedure and eliminate the echo of the other side's receiver, has promoted the speech quality of both call sides.Simultaneously, the method applied in the present invention is simple and practical.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is provided under a kind of Mobile phone hand-free state that provides in the invention process by the method flow diagram of the other side's receiver echo;
Fig. 2 is the structural representation that the device of the other side's receiver echo is provided under a kind of Mobile phone hand-free state that provides in the invention process.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment that obtains, belong to the scope of protection of the invention.
Embodiment mono-
Embodiments of the invention one provide a kind of eliminate the echo of the other side's receiver under Mobile phone hand-free state method, below in conjunction with accompanying drawing, the present embodiment are elaborated.
Fig. 1 is the method flow diagram of the embodiment of the present invention one, and with reference to figure 1, the method for the embodiment of the present invention comprises the following steps:
Step 101, open the Mobile phone hand-free pattern;
The voice signal that step 102, collection the other side transmit;
The voice signal that step 103, the other side that will collect transmit carries out inversion operation;
Furthermore, step 103 specifically comprises;
The level of the voice signal that the other side who collects is transmitted carries out negate, and the level that the level of positive voice signal is become to the level of negative voice signal or negative voice signal becomes the level of positive voice signal, and absolute value is constant.For example: the level of the current the other side's of collecting voice signal is 0.7 volt, carries out the level of this voice signal after inversion operation and has just become-0.7 volt.
The voice signal of step 104, collection one's own side mobile phone microphone;
The voice signal of the one's own side's mobile phone microphone that herein collects comprises that one's own side's voice signal (be the other side actual want the sound of hearing) and one's own side's mobile phone is play in outside speaker under hands-free mode the other side's voice signal (namely need the voice signal of eliminating, because this part voice signal passes in the other side's earpiece, the other side, sounding just looks like to hear that the echo of oneself is the same).
Step 105, the voice signal that the other side after inversion operation is transmitted carry out overlap-add procedure with the voice signal of the one's own side's mobile phone microphone that collects;
For ease of understanding, as an example of practical application example, describe, for example: the level that collects a certain moment the other side's voice signal is 0.7 volt; In step 103, the other side's voice signal that collects is carried out to inversion operation, namely level becomes-0.7 volt; By step 104, gather the voice signal of one's own side's microphone, the voice signal that herein collects comprises that level is the actual one's voice in speech signal of one's own side of x volt, also comprise that level is the other side's of playing in one's own side's mobile phone outside speaker of 0.7 volt voice signal, so, the level of the actual sound signal that step 104 collects is the stack of the two, i.e. the x+0.7 volt; The level of the voice signal of step 103 and step 104 acquisition is carried out to overlap-add procedure, namely-0.7 volt+(x+0.7 volt)=x volt.
Step 106, the voice signal after overlap-add procedure is sent to the other side's earpiece by cell phone network;
After overlap-add procedure, just can filter out the other side's who plays in outside speaker voice signal under hands-free mode, then send to the other side's earpiece by cell phone network, the other side is from just obtaining the sound of speaking of one's own side's reality receiver.
The method applied in the present invention is simple and practical, the voice signal that transmits by the other side that will collect under hands-free state carries out inversion operation and the voice signal of the other side after the inversion operation voice signal that transmits and the one's own side's mobile phone microphone that collects is carried out to overlap-add procedure and eliminate the echo of the other side's receiver, has promoted the speech quality of both call sides.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the hardware that program command is correlated with, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Embodiment bis-
The present embodiment two provides the device of eliminating the echo of the other side's receiver under a kind of Mobile phone hand-free state, and as shown in Figure 2, this device comprises:
The first acquisition module 201, for when one's own side's mobile phone open hands-free mode, gather the voice signal that the other side transmits;
The second acquisition module 203, be used to gathering the voice signal of one's own side's mobile phone microphone;
Overlap-add procedure module 204, the voice signal of the one's own side's mobile phone microphone that collects for voice signal that the other side after described inversion operation module 202 inversion operations is transmitted and described the second acquisition module 203 carries out overlap-add procedure.
Sending module 205, for sending to the other side's earpiece by the voice signal after described overlap-add procedure module 204 overlap-add procedure by cell phone network.
Wherein, the voice signal of described one's own side's mobile phone microphone comprises one's own side's voice signal and one's own side's mobile phone is play in outside speaker under hands-free mode the other side's voice signal, and the other side's who plays in outside speaker voice signal is the voice signal that the present invention need to eliminate.
This device can be filtered out the other side's one's voice in speech under hands-free state, avoid the other side in receiver, to hear the echo of oneself, has promoted speech quality.
It should be noted that, under a kind of Mobile phone hand-free state that above-described embodiment provides, eliminate the device of the other side's receiver echo, only the division with above-mentioned each functional module is illustrated, in practical application, can above-mentioned functions be distributed and by different functional modules, completed as required, the internal structure of the system of being about to is divided into different functional modules, to complete all or part of function described above.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Claims (7)
1. under a Mobile phone hand-free state, eliminate the method for the other side's receiver echo, it is characterized in that, the method comprises the following steps:
When one's own side's mobile phone open hands-free mode, gather the voice signal that the other side transmits;
The voice signal that the other side who collects is transmitted carries out inversion operation;
Gather the voice signal of one's own side's mobile phone microphone;
The voice signal that the other side after inversion operation is transmitted carries out overlap-add procedure with the voice signal of the one's own side's mobile phone microphone that collects.
2. under Mobile phone hand-free state according to claim 1, eliminate the method for the other side's receiver echo, it is characterized in that, the step that the voice signal that described the other side that will collect transmits carries out inversion operation specifically comprises;
The level of the voice signal that the other side who collects is transmitted carries out negate, and the level that the level of positive voice signal is become to the level of negative voice signal or negative voice signal becomes the level of positive voice signal, and absolute value is constant.
3. under Mobile phone hand-free state according to claim 1, eliminate the method for the other side's receiver echo, it is characterized in that, the voice signal of described one's own side's mobile phone microphone comprises one's own side's voice signal and one's own side's mobile phone is play under hands-free mode the other side's voice signal.
4. under according to claim 1 and 2 or 3 described Mobile phone hand-free states, eliminate the method for the other side's receiver echo, it is characterized in that, the step that described voice signal by the other side after the inversion operation voice signal that transmits and the one's own side's mobile phone microphone that collects carries out overlap-add procedure also comprises afterwards:
Voice signal after overlap-add procedure is sent to the other side's earpiece by cell phone network.
5. under a Mobile phone hand-free state, eliminate the device of the other side's receiver echo, it is characterized in that, this device comprises:
The first acquisition module, for when one's own side's mobile phone open hands-free mode, gather the voice signal that the other side transmits;
The inversion operation module, the voice signal that transmits for the other side that described the first acquisition module is collected carries out inversion operation;
The second acquisition module, be used to gathering the voice signal of one's own side's mobile phone microphone;
The overlap-add procedure module, the voice signal of the one's own side's mobile phone microphone that collects for voice signal that the other side after described inversion operation module inversion operation is transmitted and described the second acquisition module carries out overlap-add procedure.
6. under Mobile phone hand-free state according to claim 5, eliminate the device of the other side's receiver echo, it is characterized in that, the voice signal of described one's own side's mobile phone microphone comprises one's own side's voice signal and one's own side's mobile phone is play under hands-free mode the other side's voice signal.
7. under according to claim 5 or 6 described Mobile phone hand-free states, eliminate the device of the other side's receiver echo, it is characterized in that, this device also comprises:
Sending module, for sending to the other side's earpiece by the voice signal after described overlap-add procedure module overlap-add procedure by cell phone network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312266.5A CN103402038B (en) | 2013-07-23 | 2013-07-23 | Under Mobile phone hand-free state, eliminate method and the device of the echo of the other side's receiver |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310312266.5A CN103402038B (en) | 2013-07-23 | 2013-07-23 | Under Mobile phone hand-free state, eliminate method and the device of the echo of the other side's receiver |
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| Publication Number | Publication Date |
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| CN103402038A true CN103402038A (en) | 2013-11-20 |
| CN103402038B CN103402038B (en) | 2016-05-04 |
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| CN201310312266.5A Expired - Fee Related CN103402038B (en) | 2013-07-23 | 2013-07-23 | Under Mobile phone hand-free state, eliminate method and the device of the echo of the other side's receiver |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105681513A (en) * | 2016-02-29 | 2016-06-15 | 上海游密信息科技有限公司 | Call voice signal transmission method and system as well as a call terminal |
| CN106657700A (en) * | 2017-01-11 | 2017-05-10 | 广州广有通信设备有限公司 | Hands-free call device capable of cancelling echo and control method thereof |
| CN106713570A (en) * | 2015-07-21 | 2017-05-24 | 炬芯（珠海）科技有限公司 | Echo cancellation method and device |
| CN107172313A (en) * | 2017-07-27 | 2017-09-15 | 广东欧珀移动通信有限公司 | Improve method, device, mobile terminal and the storage medium of hand-free call quality |
| CN107819964A (en) * | 2017-11-10 | 2018-03-20 | 广东欧珀移动通信有限公司 | Improve method, apparatus, terminal and the computer-readable recording medium of speech quality |
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| CN1687894A (en) * | 2005-04-08 | 2005-10-26 | 北京中星微电子有限公司 | Method for eliminating echo |
| CN1905600A (en) * | 2005-07-26 | 2007-01-31 | 中国科学院声学研究所 | Method and apparatus for eliminating acoustics echo in handless telephone communication |
| CN103179295A (en) * | 2011-12-26 | 2013-06-26 | 沈阳晨讯希姆通科技有限公司 | Mobile terminal capable of removing echo and echo removing method thereof |
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2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1687894A (en) * | 2005-04-08 | 2005-10-26 | 北京中星微电子有限公司 | Method for eliminating echo |
| CN1905600A (en) * | 2005-07-26 | 2007-01-31 | 中国科学院声学研究所 | Method and apparatus for eliminating acoustics echo in handless telephone communication |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106713570A (en) * | 2015-07-21 | 2017-05-24 | 炬芯（珠海）科技有限公司 | Echo cancellation method and device |
| CN105681513A (en) * | 2016-02-29 | 2016-06-15 | 上海游密信息科技有限公司 | Call voice signal transmission method and system as well as a call terminal |
| CN106657700A (en) * | 2017-01-11 | 2017-05-10 | 广州广有通信设备有限公司 | Hands-free call device capable of cancelling echo and control method thereof |
| CN106657700B (en) * | 2017-01-11 | 2019-12-10 | 广州广有通信设备有限公司 | hand-free talking device capable of eliminating echo and its control method |
| CN107172313A (en) * | 2017-07-27 | 2017-09-15 | 广东欧珀移动通信有限公司 | Improve method, device, mobile terminal and the storage medium of hand-free call quality |
| CN107819964A (en) * | 2017-11-10 | 2018-03-20 | 广东欧珀移动通信有限公司 | Improve method, apparatus, terminal and the computer-readable recording medium of speech quality |
| CN107819964B (en) * | 2017-11-10 | 2021-04-06 | Oppo广东移动通信有限公司 | Method, device, terminal and computer readable storage medium for improving call quality |
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| CN103402038B (en) | 2016-05-04 |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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