CN201199709Y - Mobile communication terminal with function of removing noise - Google Patents
Mobile communication terminal with function of removing noise Download PDFInfo
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- CN201199709Y CN201199709Y CNU2008200590403U CN200820059040U CN201199709Y CN 201199709 Y CN201199709 Y CN 201199709Y CN U2008200590403 U CNU2008200590403 U CN U2008200590403U CN 200820059040 U CN200820059040 U CN 200820059040U CN 201199709 Y CN201199709 Y CN 201199709Y
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Abstract
The utility model discloses a mobile communication terminal with noise removal function, which comprises a main microphone, an auxiliary microphone, a high frequency boosting module, an audio coding and decoding module and a central processing module. The main microphone and the auxiliary microphone form a conical radio reception area; the high frequency boosting module is used for boosting the power of the high frequency part in a voice signal output by the main microphone, and outputting the processed voice signal and an environmental noise signal output by the main microphone to the audio coding and decoding module; the audio coding and decoding module is used for converting the environmental noise signal output by the auxiliary microphone, the voice signal and the environmental noise signal which are transmitted by the high frequency boosting module into digital signals and then outputting the digital signals to the central processing module; and the central processing module is used for carrying out mutual cancellation treatment to the environmental noise signals converted by the audio coding and decoding module and respectively coming from the auxiliary microphone and the high frequency boosting module. By applying the mobile communication terminal, the noise removal can be carried out to multiple links of audio processing, therefore, effect better than the prior art can be achieved.
Description
Technical field
The utility model relates to portable electronic device, particularly a kind of mobile call terminal with removal noise function.
Background technology
Along with the high speed development of mobile communication technology, mobile call terminal has obtained developing rapidly and popularizing in the world, for the user brings great convenience.
Audio Processing is a critical function of mobile call terminal, corresponding this function, and Fig. 1 is the frame structure schematic diagram of mobile call terminal in the prior art, mainly comprises: microphone, audio coding decoding module and central processing module.
Described microphone, number is one, is used to receive the analog voice signal of input, exports to the audio coding decoding module.
Described audio coding decoding module, inside comprise filter circuit and audio coding decoding chip.Wherein filter circuit is used for the analog voice signal of described microphone output is carried out Filtering Processing, makes the parameters of this voice signal meet the preassigned of subsequent treatment, and the analog voice signal after the Filtering Processing is exported to the audio coding decoding chip; The audio coding decoding chip is used for the analog voice signal of filter circuit output is carried out encoding process, exports to central processing module after being converted to audio digital signals.
Described central processing unit is used for the user mode according to current mobile call terminal, the audio digital signals of audio coding decoding module output is forwarded to the processing module of correspondence.For example, if the user mode of current mobile call terminal is a hearing aid, then the audio digital signals with the output of audio coding decoding module sends the audio coding decoding module again to, is undertaken being sent to earphone or loud speaker after decoding processing is converted to simulated audio signal by the audio coding decoding module; If the user mode of current mobile call terminal is recording, then the storage area that the audio digital signals of audio coding decoding module output directly is sent in the mobile call terminal is stored; And for example the user mode of the current mobile call terminal of fruit is a normal talking, then the audio digital signals with the output of audio coding decoding module directly sends the module of being responsible for communication to, sends audio digital signals to mobile call terminal that partner is used by special mode by the module of being responsible for communication.
People usually in the street, the more place of ambient noise such as meeting scene uses mobile call terminal, therefore above-mentioned microphone also can receive a large amount of ambient noises when receiving analog voice signal.And do not comprise the part of removing ambient noise in the frame structure of mobile call terminal at present, in order to realize removing the noise function, common way is the algorithm routine that ambient noise is removed in storage in above-mentioned central processing module, after central processing module receives digital audio and video signals, call this algorithm routine and digital audio and video signals is removed the processing of noise, the mode of this single removal noise makes that the removal noise effects of present mobile call terminal is very limited.
The utility model content
In view of this, main purpose of the present utility model is to provide a kind of mobile call terminal of removing the noise function that has, and can all remove the operation of noise at a plurality of links in the Audio Processing, thereby reach than the better effect of prior art.
The technical solution of the utility model is achieved in that
A kind of mobile call terminal with removal noise function comprises: audio coding decoding module and central processing module; Key is that this mobile call terminal also comprises: main microphone, secondary microphone and high boost module;
Described main microphone and secondary microphone, the radio reception zone of formation taper; Wherein main microphone is used for receiving voice signal and a part of ambient noise signal in described radio reception zone, exports to the high boost module; Secondary microphone is used for receiving another part ambient noise signal in described radio reception zone, directly exports to the audio coding decoding module;
Described high boost module is used to promote the voice signal high frequency power partly that described main microphone is exported, and with the ambient noise signal of voice signal after handling and the reception of main microphone, exports to the audio coding decoding module;
Described audio coding decoding module after being used for voice signal that ambient noise signal and high boost module with the output of secondary microphone transmit and ambient noise signal and being converted to digital signal, is exported to central processing module;
Described central processing module is used for and will offsets processing from the ambient noise signal of secondary microphone and high boost module respectively after the described audio coding decoding module converts, obtains removing the voice signal behind the noise.
Preferably, described main microphone and secondary microphone form the radio reception zone of taper, are to realize by the position that main microphone and secondary microphone are set.
Preferably, comprise in the described high boost module: input (401), first resistance (402), second resistance (403), the 3rd resistance (404), triode (405), first electric capacity (406), second electric capacity (407) and output (408);
One end of one end of one end of described first resistance (402), second resistance (403), second electric capacity (407) is connected with the collector electrode of triode (405) respectively, the other end of described second electric capacity (407) is connected with output (408), and the other end of described first resistance (402) is connected with power supply;
One end of the other end of described first resistance (403) and first electric capacity (406), and the base stage of triode (405) be connected, the other end of described first electric capacity (406) is connected with input (401);
One end of described the 3rd resistance (404) is connected other end ground connection with the emitter of triode (405).
Preferably, the product of described first electric capacity (406) and first resistance (402), decision high boost module is to the lifting amplitude of the power of voice signal high-frequency part.
Preferably, described audio coding decoding module comprises:
First input filter circuit is used for the voice signal and the ambient noise signal of the output of high boost module are carried out Filtering Processing;
Second input filter circuit is used for the ambient noise signal of secondary microphone output is carried out Filtering Processing;
The audio coding decoding chip, being used for is digital signal with the conversion of signals after first input filter circuit and the processing of second input filter circuit respectively, exports to central processing module.
Preferably, described second input filter circuit is connected with the audio coding decoding chip by the expansion interface on the audio coding decoding chip.
Preferably, described first input filter circuit is identical with the structure of described second filter circuit.
Preferably, described central processing module carries out offsets processing, is to adopt the method for self adaptation acoustic beam orientation to realize.
As seen, the mobile call terminal that the utility model provides, utilize the position of main microphone and secondary microphone on the one hand, with the radio reception region limits is the radio reception zone of a taper, because voice signal has directivity, and ambient noise does not have directivity, so by the regional main received speech signal of the radio reception of this taper, and most ambient noise is just suppressed in the radio reception link; On the other hand because the energy of voice signal HFS is smaller, receive the interference of ambient noise easily, therefore used the high boost module that the voice signal that receives is carried out the lifting of HFS power, strengthened the interference free performance of voice signal at ambient noise; The third aspect, by central processing module the two-way ambient noise signal that the audio coding decoding module transmits is offseted processing, be about to offset processing, thereby obtain removing the voice signal of noise from the ambient noise signal of secondary microphone with from the ambient noise of high boost module.Utilize above-mentioned three aspects, therefore the processing from a plurality of links have carried out removing ambient noise with respect to the removal noise processed of only using software program to carry out in the prior art, will obtain better effect in central processing module.
Description of drawings
Fig. 1 is the frame structure schematic diagram of mobile call terminal in the prior art;
Fig. 2 is the frame structure schematic diagram of mobile call terminal in the utility model;
Fig. 3 is the taper radio reception area schematic that main microphone and secondary microphone form in the utility model;
Fig. 4 is a kind of realization schematic diagram of the utility model medium-high frequency hoisting module internal structure;
Fig. 5 is a kind of realization schematic diagram of the utility model sound intermediate frequency decoder module internal structure.
Embodiment
For making the purpose of this utility model and advantage clearer, the utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 2 is for having the frame structure schematic diagram of the mobile call terminal of removing the noise function in the utility model, this mobile call terminal comprises: audio coding decoding module and central processing module.Key is, also comprises in this mobile call terminal: main microphone, secondary microphone and high boost module.
Introduce the 26S Proteasome Structure and Function of each part mentioned above below respectively in detail.
1. above-mentioned main microphone and secondary microphone, the radio reception zone of formation taper, wherein main microphone receives voice signal and a part of ambient noise signal in this radio reception zone, exports to the high boost module; Secondary microphone receives another part ambient noise signal in this radio reception zone, directly exports to the audio coding decoding module.
Utilize the radio reception zone of the position formation taper of main microphone and secondary microphone arrangement, can be as shown in Figure 3.Because voice signal has directivity (shown in the solid arrow among Fig. 3), and ambient noise does not have directivity, therefore by the position of main microphone and secondary microphone is set, make taper radio reception zone be primarily aimed at the direction of voice signal, thereby just the ambient noise outside the taper radio reception zone can be excluded in the radio reception link.Position as for how main microphone and secondary microphone specifically are set could form the conical region that is primarily aimed at voice signal, with not difference of usual way, therefore repeats no more here.
2. above-mentioned high boost module is used to promote the power of high-frequency part (hereinafter to be referred as HFS) of the voice signal of main microphone output, and the ambient noise signal of voice signal after handling and the output of main microphone is exported to described audio coding decoding module.
Because the energy of voice signal medium-high frequency part is smaller usually, easy and ambient noise is obscured, and promptly is subjected to the interference of ambient noise easily, 2 times of the every raisings of the frequency of voice signal generally, and power will reduce about 6dB.If therefore the power with voice signal medium-high frequency part improves, the antinoise interference performance of voice signal will be improved.
Fig. 4 is a kind of realization schematic diagram of the utility model medium-high frequency hoisting module internal structure, the voice signal that main microphone receives and a part of ambient noise signal are by input 401 these circuit of input, signal after the processing sends the audio coding decoding module to by output 408, the power supply in the VCC termination mobile call terminal; First resistance 402, second resistance 403 and the 3rd resistance 404 play the working point of stablizing triode 405, the effect that improves triode 405 amplification performances; First electric capacity 406 and second electric capacity 407 play the effect that intercepts direct current.
According to circuit shown in Figure 4, first electric capacity 406 and first resistance 402 have constituted the RC loop, thereby adjust their product numerical value by changing the parameter value, can change the lifting amplitude to voice signal HFS power.
3. above-mentioned audio coding decoding module after the voice signal after the processing that is used for the wind-borne ambient noise signal of secondary Mike and high boost module are transmitted and another part ambient noise signal are converted to digital signal, is exported to described central processing module.
Fig. 5 is a kind of realization schematic diagram of the utility model sound intermediate frequency coding/decoding module internal structure, and this audio coding decoding module comprises: the audio coding decoding chip 501 and first filter circuit 502.The aspect identical with existing mobile call terminal is that the signal of input audio coding decoding chip 501 all will carry out Filtering Processing earlier, so that the parameters of the signal after the Filtering Processing meets the preassigned of subsequent treatment; Audio coding decoding chip 501 is a digital signal with the conversion of signals of input.The aspects different with existing mobile call terminal are, audio coding decoding chip 501 needs simultaneously to handling from the two paths of signals of input 503 and 504 inputs, wherein input 503 receptions are from the signal of high boost module, the signal that input 504 receives from secondary microphone, correspondingly, increase by one the tunnel with identical second filter circuit 505 of existing filter circuit construction; Utilize one group of expansion interface on the audio coding decoding chip 501, as the port of the input audio coding decoding chip of the road signal that increases.
Above-mentioned first filter circuit 502 and second filter circuit 505, all identical with filter circuit construction and function in the audio coding decoding module of common mobile call terminal, repeat no more here.
4. above-mentioned central processing module is used for and will offsets processing from the ambient noise signal of high boost module and secondary microphone respectively after the audio coding decoding module converts, obtains removing the voice signal behind the noise.
Because main microphone and secondary microphone have received a part of ambient noise signal respectively, central processing module in the utility model need offset processing to this two parts ambient noise signal, can specifically adopt the method for self adaptation acoustic beam orientation during processing, this specific implementation that offsets processing repeats no more here with normally used identical.
As seen, the mobile call terminal that the utility model provides, utilize the position of main microphone and secondary microphone on the one hand, with the radio reception region limits is the radio reception zone of a taper, because voice signal has directivity, and ambient noise does not have directivity, so by the regional main received speech signal of the radio reception of this taper, and most ambient noise is just suppressed in the radio reception link; On the other hand because the energy of voice signal HFS is smaller, receive the interference of ambient noise easily, therefore used the high boost module that the voice signal that receives is carried out the lifting of HFS power, strengthened the interference free performance of voice signal at ambient noise; The third aspect, by central processing module the two-way ambient noise signal that the audio coding decoding module transmits is offseted processing, be about to offset processing, thereby obtain removing the voice signal of noise from the ambient noise signal of secondary microphone with from the ambient noise of high boost module.Utilize above-mentioned three aspects, therefore the processing from a plurality of links have carried out removing ambient noise with respect to the removal noise processed of only using software program to carry out in the prior art, will obtain better effect in central processing module.
Above-mentioned central processing module, finish offset processing after, equally can be according to the user mode of current mobile call terminal, the voice signal that obtains is forwarded to corresponding processing module.For example,, then send the voice signal that obtains to the audio coding decoding module again, undertaken being sent to earphone or loud speaker after decoding processing is converted to simulated audio signal by the audio coding decoding module if the user mode of current mobile call terminal is a hearing aid; If the user mode of current mobile call terminal is recording, then the storage area that the voice signal that obtains directly is sent in the mobile call terminal is stored; And for example the user mode of the current mobile call terminal of fruit is a normal talking, then the voice signal that obtains is directly sent to the module of being responsible for communication, send voice signal to mobile call terminal that partner is used by special mode by this module of being responsible for communication.Therefore, the mobile call terminal that the utility model provides can obtain better removing anti noise than existing scheme at the relevant function of voice signal.
The above is preferred embodiment of the present utility model only, is not to be used to limit protection range of the present utility model.All within spirit of the present utility model and principle, any modification of being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. one kind has the mobile call terminal of removing the noise function, comprising: audio coding decoding module and central processing module; It is characterized in that this mobile call terminal also comprises: main microphone, secondary microphone and high boost module;
Described main microphone and secondary microphone, the radio reception zone of formation taper; Wherein main microphone is used for receiving voice signal and a part of ambient noise signal in described radio reception zone, exports to the high boost module; Secondary microphone is used for receiving another part ambient noise signal in described radio reception zone, directly exports to the audio coding decoding module;
Described high boost module is used to promote the voice signal high frequency power partly that described main microphone is exported, and with the ambient noise signal of voice signal after handling and the reception of main microphone, exports to the audio coding decoding module;
Described audio coding decoding module after being used for voice signal that ambient noise signal and high boost module with the output of secondary microphone transmit and ambient noise signal and being converted to digital signal, is exported to central processing module;
Described central processing module is used for and will offsets processing from the ambient noise signal of secondary microphone and high boost module respectively after the described audio coding decoding module converts, obtains removing the voice signal behind the noise.
2. mobile call terminal as claimed in claim 1 is characterized in that, described main microphone and secondary microphone form the radio reception zone of taper, is to realize by the position that main microphone and secondary microphone are set.
3. mobile call terminal as claimed in claim 1, it is characterized in that, comprise in the described high boost module: input (401), first resistance (402), second resistance (403), the 3rd resistance (404), triode (405), first electric capacity (406), second electric capacity (407) and output (408);
One end of one end of one end of described first resistance (402), second resistance (403), second electric capacity (407) is connected with the collector electrode of triode (405) respectively, the other end of described second electric capacity (407) is connected with output (408), and the other end of described first resistance (402) is connected with power supply;
One end of the other end of described first resistance (403) and first electric capacity (406), and the base stage of triode (405) be connected, the other end of described first electric capacity (406) is connected with input (401);
One end of described the 3rd resistance (404) is connected other end ground connection with the emitter of triode (405).
4. mobile call terminal as claimed in claim 3 is characterized in that, the product of described first electric capacity (406) and first resistance (402), and decision high boost module is to the lifting amplitude of the power of voice signal high-frequency part.
5. mobile call terminal as claimed in claim 1 is characterized in that, described audio coding decoding module comprises:
First input filter circuit is used for the voice signal and the ambient noise signal of the output of high boost module are carried out Filtering Processing;
Second input filter circuit is used for the ambient noise signal of secondary microphone output is carried out Filtering Processing;
The audio coding decoding chip, being used for is digital signal with the conversion of signals after first input filter circuit and the processing of second input filter circuit respectively, exports to central processing module.
6. mobile call terminal as claimed in claim 5 is characterized in that, described second input filter circuit is connected with the audio coding decoding chip by the expansion interface on the audio coding decoding chip.
7. mobile call terminal as claimed in claim 5 is characterized in that, described first input filter circuit is identical with the structure of described second filter circuit.
8. mobile call terminal as claimed in claim 1 is characterized in that, described central processing module carries out offsets processing, is to adopt the method for self adaptation acoustic beam orientation to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200590403U CN201199709Y (en) | 2008-05-28 | 2008-05-28 | Mobile communication terminal with function of removing noise |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200590403U CN201199709Y (en) | 2008-05-28 | 2008-05-28 | Mobile communication terminal with function of removing noise |
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| CN201199709Y true CN201199709Y (en) | 2009-02-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568492A (en) * | 2010-12-13 | 2012-07-11 | 佳能株式会社 | Audio processing apparatus, audio processing method, and image capturing apparatus |
| WO2013053271A1 (en) * | 2011-10-12 | 2013-04-18 | 惠州Tcl移动通信有限公司 | Mobile phone and call signal processing method for same |
| WO2016000350A1 (en) * | 2014-07-02 | 2016-01-07 | 中兴通讯股份有限公司 | Method for realising call noise elimination, terminal and computer storage medium |
| CN105338452A (en) * | 2015-12-04 | 2016-02-17 | 广州三星通信技术研究有限公司 | Method for achieving noise reduction in electronic terminal and electronic terminal thereof |
-
2008
- 2008-05-28 CN CNU2008200590403U patent/CN201199709Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568492A (en) * | 2010-12-13 | 2012-07-11 | 佳能株式会社 | Audio processing apparatus, audio processing method, and image capturing apparatus |
| CN102568492B (en) * | 2010-12-13 | 2014-06-25 | 佳能株式会社 | Audio processing apparatus, audio processing method, and image capturing apparatus |
| WO2013053271A1 (en) * | 2011-10-12 | 2013-04-18 | 惠州Tcl移动通信有限公司 | Mobile phone and call signal processing method for same |
| WO2016000350A1 (en) * | 2014-07-02 | 2016-01-07 | 中兴通讯股份有限公司 | Method for realising call noise elimination, terminal and computer storage medium |
| CN105338452A (en) * | 2015-12-04 | 2016-02-17 | 广州三星通信技术研究有限公司 | Method for achieving noise reduction in electronic terminal and electronic terminal thereof |
| CN105338452B (en) * | 2015-12-04 | 2019-02-12 | 广州三星通信技术研究有限公司 | The method and its electric terminal of noise reduction are realized in electric terminal |
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| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wu Yanchun Inventor after: Wang Tianyou Inventor before: Wu Yanchun Inventor before: Wang Tianyou |
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Granted publication date: 20090225 Termination date: 20150528 |
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