CN201491082U - Mobile phone - Google Patents
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- CN201491082U CN201491082U CN200920172907.0U CN200920172907U CN201491082U CN 201491082 U CN201491082 U CN 201491082U CN 200920172907 U CN200920172907 U CN 200920172907U CN 201491082 U CN201491082 U CN 201491082U
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Abstract
The utility model provides a mobile phone, which comprises a mobile phone body, a first microphone, a radio-frequency module, a base-band processing module, an audio power amplifier and a horn. The base-band processing module comprises a first input end and a first output end. The mobile phone body additionally comprises a voice signal processing module connected with the first microphone and the base-band processing module. The voice signal processing module comprises a second input end, a third input end, a second output end and a first processing module, wherein the second input end is connected with the first microphone; the third input end is connected with the output end of the audio power amplifier; the second output end is connected with the first input end; and the first processing module is used to receive signals input from the second input end and the third input end, to eliminate the resonance of the signal input from the second input end and to output the signal after resonance elimination through the second output end. By adopting the technical scheme, the user can filter the voice on the other side in the signals collected by the microphone in the hands-free mode, so that the user on the other side does not hear the resonance and the mobile phone can be used for holding hands-free telephone conference.
Description
Technical field
The utility model relates to a kind of mobile communication equipment, particularly relates to a kind of mobile phone.
Background technology
In the prior art, people utilize fixing TeleConference Bridge to hold videoconference usually, as Polycom etc., in realizing process of the present utility model, utility model people finds that there is following shortcoming in the landline telephone conference system of prior art: need the fixed line access point; Need fixing office space such as meeting room; Somewhat expensive and volume is big, be not easy to carry.
Development along with World Economics, increasing user especially business people needs to guarantee anywhere or anytime sufficient fighting capacity, and concerning them, each business opportunity is not all allowed to miss, the landline telephone conference system is because the above-mentioned shortcoming that exists can not satisfy the needs that the user holds videoconference whenever and wherever possible.
The utility model content
The purpose of this utility model is to provide a kind of mobile phone, this mobile phone can be eliminated the echo problem of big volume when hands-free by its voice signal processing module, can satisfy the needs that the user holds videoconference whenever and wherever possible for the user provides a kind of mobile TeleConference Bridge platform.
To achieve these goals, the utility model provides a kind of mobile phone, a kind of mobile phone, comprise: body, and being arranged on first microphone, radio-frequency module, baseband processing module, audio-frequency power amplifier and loudspeaker on the described body, described baseband processing module comprises: the first input end and first output; Described first output is connected with the input of described audio-frequency power amplifier; The output of described audio-frequency power amplifier is connected with described loudspeaker; Wherein, described body also comprises:
With the voice signal processing module that described first microphone is connected with baseband processing module, described voice signal processing module comprises:
Second input is connected with described first microphone;
The 3rd input is connected with the output of described audio-frequency power amplifier;
Second output is connected with described first input end;
Be used to receive signal by described second input and the input of the 3rd input, with the signal by the input of described the 3rd input is reference signal to the signal that receives by described second input echo processing that disappears, and will be through the signal of the echo processing that disappears first processing module by described second output output, described first processing module is connected with described second input, the 3rd input and second output.
Preferably, described mobile phone, wherein, described voice signal processing module also comprises:
Be used for first preamplifier that amplifies of first microphone signal to input, described first preamplifier is connected with described second input;
Be used for first microphone signal after the described amplification is carried out analog-to-digital conversion, and the signal after will changing imports first analog to digital converter of described first processing module, and described first analog to digital converter is connected with described first processing module with described first preamplifier.
Preferably, described mobile phone wherein, also comprises:
Second microphone is arranged on the not homonymy of described body with described first microphone.
Preferably, described mobile phone, wherein, the distance between the MIC of the MIC of described first microphone and described second microphone is greater than 40mm.
Preferably, described mobile phone, wherein, described first microphone is arranged on the bottom of described body, and the MIC of described first microphone is arranged on the keyboard face of described body; Described second microphone is arranged on the top of described body, and the MIC of described second microphone is arranged on the side at described body top.
Preferably, described mobile phone, wherein, described voice signal processing module also comprises:
Four-input terminal is connected with described second microphone;
Be used to receive microphone signal by described second input and four-input terminal input, second microphone signal according to described four-input terminal input will be by the ambient noise filtering in first microphone signal of described second input input and with second processing module of the signal after the filtering by described second output output, and described second processing module is connected with second output with described second input, four-input terminal.
Preferably, described mobile phone, wherein, described signal processing module also comprises:
Be used for second preamplifier that amplifies of second microphone signal to input, described second preamplifier is connected with described four-input terminal;
Be used for second microphone signal after the described amplification is carried out analog-to-digital conversion, and the signal after will changing imports second analog to digital converter of described second processing module, and described second analog to digital converter is connected with described second processing module with described second preamplifier.
Preferably, described mobile phone, wherein, described loudspeaker are full range band metallic aluminium composite membrane loudspeaker.
Preferably, described mobile phone, wherein, the voice coil loudspeaker voice coil of described loudspeaker is the skeleton voice coil loudspeaker voice coil.
Preferably, described mobile phone, wherein, the distance between the MIC of the center of described loudspeaker outlet sound mouth and described first microphone is not less than 100mm.
Preferably, described mobile phone wherein, also comprises: have the strong point of height, the outlet sound mouth of the described strong point and described loudspeaker is provided with at interval, and is positioned at the same plane of described fuselage with described loudspeaker outlet sound mouth.
Preferably, described mobile phone, wherein, described strong point height is 1.0mm～1.5mm.
Preferably, described mobile phone, wherein, the distance between the center of the described strong point and described loudspeaker outlet sound mouth is 3mm～5mm.
Preferably, described mobile phone wherein, also comprises:
Mute button is used for when described mobile phone is in the TeleConference Bridge pattern, and the up words of sending that trigger mobile phone are quiet.
A technical scheme in the technique scheme has following technique effect:
Mobile phone of the present utility model is before the voice signal input baseband processing module that first microphone is collected, by the voice signal processing module that is provided with to the echo processing that disappears of this voice signal, can be under hands-free mode, the sound filtering of the other side who spreads out of by loudspeaker in the voice signal that first microphone is collected, thereby thoroughly eliminate the singing phenomenon between first microphone and the mobile phone loudspeaker, make when mobile phone is worked under big volume hands-free mode, can guarantee the voice signal that has only local terminal that first microphone was collected, make the other side can not hear the sound of oneself, the user can utilize this mobile phone to participate in videoconference like this, has satisfied the needs that the user holds videoconference whenever and wherever possible.
Another technical scheme in the technique scheme has following technique effect:
By using full range band metallic aluminium composite membrane loudspeaker, big volume and true voice reduction can be provided, and be somebody's turn to do kind low frequency frequency response greatly; By using two microphones, can eliminate ambient noise; By before the voice signal input baseband processing module that microphone is collected, the voice signal that utilizes preamplifier that microphone is collected amplifies once more, can improve the sensitivity of microphone, thus and the radio reception scope of expansion microphone.By before the voice signal input baseband processing module that microphone is collected, this voice signal is carried out the filtering environmental noise and eliminates the processing of echo, make the voice signal that has only local terminal that microphone collected, the sound that the other side can not hear oneself; By utilizing above-mentioned means to improve the speech quality of existing mobile phone when the hand-free call, make mobile phone can be used as mobile TeleConference Bridge platform.
Description of drawings
Fig. 1 is the structural representation of the mobile phone of the utility model embodiment;
Fig. 2 is the principle schematic that the mobile phone of another embodiment of the utility model is realized conference call functions;
Fig. 3 is the floor map of the mobile phone of another embodiment of the utility model;
Fig. 4 is that the strong point and the mobile phone each several part position of the mobile phone of embodiment of the present utility model concerns schematic diagram.
Embodiment
For technical problem, technical scheme and advantage that the utility model embodiment will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The inventor finds that in realizing process of the present utility model the existing fixed TeleConference Bridge is because its stationarity can't satisfy the needs that the user holds videoconference whenever and wherever possible; And, though existing mobile phone has mobility, because its speech quality when hands-free is not good, especially when big volume is hands-free, can't eliminate the echo between microphone and the loudspeaker, make it to hold videoconference as the TeleConference Bridge platform that moves.The inventor finds in realizing process of the present utility model, utilizes the hands-free mode of mobile phone to realize that the key of mobile phone hands-free phone meeting is the voice signal processing in the cell phone system.
Fig. 1 is the structural representation of the mobile phone of the utility model embodiment.As Fig. 1, the mobile phone of this embodiment comprises body 101, and being arranged on first microphone 102, radio-frequency module 103, baseband processing module 104, audio-frequency power amplifier 105 and loudspeaker 106 on the described body, described baseband processing module comprises: the first input end 107 and first output 108; Described first output is connected with the input of described audio-frequency power amplifier; The output of described audio-frequency power amplifier is connected with described loudspeaker; Wherein, this body also comprises: voice signal processing module 113, be used for the voice signal that described first microphone is collected is handled, and the voice signal after will handling is imported described baseband processing module by described first input end, described voice signal processing module comprises: second input 109 is connected with described first microphone; The 3rd input 110 is connected with the output of described audio-frequency power amplifier; Second output 111 is connected with described first input end; First processing module 112, be connected with described second input, the 3rd input and second output, be used to receive signal by described second input and the input of the 3rd input, and be reference signal to the signal that receives by described second input echo processing that disappears, and will be through the signal of the echo processing that disappears by the output of second output with signal by the input of described the 3rd input.Wherein, be the voice signal of first microphone input by the signal of second input input; Signal by the 3rd input input is: the other side's who receives by radio-frequency module voice signal was handled and the voice signal of the other side after the audio-frequency power amplifier amplification through baseband processing module.
Utilize mobile phone of the present utility model to solve the echo problem of big volume when hands-free, thereby can realize the hands-free phone conferencing function, under the hands-free phone conference model, the user can hold videoconference under this pattern.When the user utilizes this pattern conversation, in the up link: voice signal is collected by first microphone, after signal is handled through voice signal processing module, be sent to the baseband processing module such as the Analog Baseband chip treatment conversion of mobile phone, the back is emitted to the base station by the radio-frequency module of mobile phone; In the down link: the radio-frequency module received signal of mobile phone, the baseband processing module of mobile phone is delivered in conversion, carry out digital to analog conversion and demodulation by baseband processing module after, after audio-frequency power amplifier amplifies, be sent to sound horn.Among this embodiment, sound is collected by first microphone, the voice signal input speech signal processing module of the other side after simultaneously audio frequency amplifier being amplified is as the reference signal, carrying out voice signal through voice signal processing module handles, sound filtering with the other side in the voice signal of first microphone collection, thereby guarantee the voice signal that has only local terminal that first microphone was collected, make the other side can not hear that own one's voice in speech promptly can not hear echo.
Preferably, this first processing module can (Digital signal Processor DSP) realizes by existing digital signal processor with the echo processing function that disappears.
Preferably, above-mentioned voice signal processing module can realize by existing chip with the echo processing function that disappears, exemplarily realize as the FM2018 chip.
Fig. 2 is the principle schematic that the mobile phone of another embodiment of the utility model is realized conference call functions.As Fig. 2, the mobile phone of this embodiment comprises two microphones, first microphone 201 and second microphone, 202, the first microphones are mainly used in the voice signal of collecting local terminal as main microphone, and second microphone is as the ambient noise that is mainly used in from microphone around collecting.As Fig. 2, this mobile phone also comprises: voice signal processing module 203, baseband processing module 213, audio-frequency power amplifier 214, loudspeaker 215 and radio-frequency module 216.Voice signal processing module 203 comprises: digital signal processor DSP 204, the first preamplifier PGA205, the first analog to digital converter ADC 206, second preamplifier 207, second analog to digital converter, 208, the three preamplifiers, 209, the three analog to digital converters 210, the first digital to analog converter DAC, 211, the four preamplifiers 212.
As Fig. 2, the voice signal MIC 0 that first microphone is collected is by first preamplifier of second input, the 222 output speech processing module of speech processing module, voice signal after the amplification, after first analog to digital converter is converted to digital signal, the DSP in the input speech signal processing module; The voice signal MIC 1 that second microphone is collected is by second preamplifier of the four-input terminal 224 output speech processing module of speech processing module, and the voice signal after the amplification after second analog to digital converter is converted to digital signal, is imported DSP; After baseband processing module BB carries out digital to analog conversion and demodulation with the radiofrequency signal that receives in the down link, export audio-frequency power amplifier to by first output 221, signal after amplifying is by output 226 outputs of audio-frequency power amplifier, riches all the way delivers to sound horn for the signal of audio-frequency power amplifier output, another road is by the 3rd input 223 input speech signal processing modules of voice signal processing module, with the reference signal of the echo processing that disappears as voice signal processing module.
Wherein, the local terminal voice signal MIC 0 that first microphone is collected imports DSP through amplifying after, and this MIC0 comprises: near-end caller's voice signal, environmental noise reach the other side's who sends from loudspeaker voice signal.What the 3rd input was imported is the voice signal of far-end, the i.e. voice signal of the other side after audio-frequency power amplifier amplifies, this signal input DSP is mainly used in when DSP utilizes the echo Audio Processing algorithm that disappears that presets to disappear the echo Audio Processing as the reference signal.The far-end speech signal of local terminal voice signal MIC 0 that first microphone is collected and the input of the 3rd input converts digital signal to after amplifying, input DSP, by the DSP echo Audio Processing that disappears, thereby the voice signal of the near-end caller among the MIC 0 and the voice signal of remote parties are separated, and the voice signal of only exporting the near-end caller converts analog signal to first digital to analog converter, after amplifying, exports the 4th preamplifier from the second output LOUT, and, change after radio-frequency module 216 sends to the other side by baseband processing module by behind the first input end input baseband processing module.Like this by the echo processing that disappears, can be with the sound filtering of the other side in the voice signal of collecting in first microphone, thus guarantee that the promptly main microphone of first microphone only collected local terminal caller's voice signal, make the other side can not hear the other side's oneself sound.After such voice signal was handled, mobile phone can guarantee the communication effect under the hands-free phone conference model, for charging mobile phone meeting platform has been created condition.In this example, realize the function of first processing module by in DSP, utilizing the echo Audio Processing algorithm that disappears that presets.
In addition, the mobile phone of this embodiment adopts the dual microphone structure, is mainly used in noise reduction.The local terminal voice signal that first microphone is collected is imported DSP after amplifying, the ambient noise that second microphone is collected is imported DSP after amplifying, DSP realizes the function of second processing module by the noise reduction algorithm that presets on it, according to this two paths of signals the ambient noise in the local voice signal of first microphone collection is removed, carry out noise reduction process with the voice signal that first microphone is collected, signal after the noise reduction process is by the output of second output, make the sound that is sent to the other side by radio-frequency module not contain or only contain less noise, guaranteed the definition of sound.Exemplarily, DSP utilizes and to have second processing module of removing the function of making an uproar and finish the above-mentioned operation of making an uproar that removes.Second processing module is connected with second input, four-input terminal and second output.Preferably, the distance between the MIC of two microphones is greater than 40mm, and two microphones can not coexist on the axle center of mobile phone and homonymy, otherwise to the inhibition of influence to ambient noise.
Preferably, the voice signal processing module of this embodiment is by existing FM2018 chip, utilizes existing disappear echo and denoising algorithm realize disappearing echo and noise removal function to realize.Exemplary but not as restrictedly, first microphone is that MIC0_P is connected with the MIC0_N pin with the B7 of FM2018 with the A7 pin, second microphone is that MIC1_P is connected with the MIC1_N pin with the B5 of FM2018 with the A5 pin, and the signal of audio-frequency power amplifier output is LINE_IN_P and LINE_IN_N pin input FM2018 by C5 and the C4 pin of FM2018; Signal after FM2018 handles is that the LINE_OUT pin exports baseband processing module to by its B3 pin.
In concrete the application, the user whether need can select disappear echo or denoising as required, then triggers corresponding processing module as needs.
In addition, the mobile phone of this embodiment, the signal that microphone is collected all is to handle through the back input speech signal processing module of amplifying once more of preamplifier, improved the sensitivity of microphone like this, enlarged the pickup scope of microphone, make the pickup scope of microphone might reach 1.5m, more help carrying out the hands-free phone meeting.
Fig. 3 is the floor map of the mobile phone of another embodiment of the utility model.As Fig. 3, the mobile phone of this embodiment is a stick-type phones.In this example, first microphone 301 is arranged on the bottom of body, and the MIC of first microphone is arranged on the keyboard face of body, can collect the voice signal of 360 degree, and do not blocked so that under mobile phone hands-free phone conference model like this; Second microphone 302 is arranged on the top of body, and the MIC of second microphone is arranged on the side at body top, like this, collects the noise of surrounding environment when second microphone is conveniently conversed under hand-held mode, and is not subjected to blocking of staff, face.In this example, the phonate hole of loudspeaker 303 is arranged on the back side of body.For preventing the singing phenomenon between loudspeaker and the microphone, the center of loudspeaker outlet sound mouth and the distance of stating between the MIC of first microphone are not less than 100mm.
Preferably, above-mentioned loudspeaker are full range band metallic aluminium composite membrane loudspeaker, and the voice coil loudspeaker voice coil of stating loudspeaker is the skeleton voice coil loudspeaker voice coil.Adopt the design of metallic aluminium compound film sheet, can improve the low frequency frequency response of loudspeaker greatly, in the mobile phone narrow space, realize the shock bass effect.Skeleton voice coil loudspeaker voice coil design by falling coil on a paper tube support, can reduce the distortion of low frequency frequency range greatly, makes voice more fine and smooth, accurate positioning, and reduction is truly when hands-free playback sound.
Fig. 3 is that example is illustrated with the stick-type phones, but embodiment of the present utility model is not limited to stick-type phones, and each device position of clamshell phone can be provided with reference to the device position of plate rolls type mobile phone.
Preferably, the mobile phone of this embodiment also comprises: have the strong point of height, the outlet sound mouth of this strong point and loudspeaker is provided with at interval, and is positioned at the same plane of body with the outlet sound mouth of loudspeaker.By in anechoic chamber, carrying out after frequency response curve that experimental test obtains is provided with the strong point apart from loudspeaker outlet sound mouth a distance as can be known, sound effect that obtains after utilizing the strong point to make angle space that plane, outlet sound mouth place and baffle plane form with sound reflection and loudness is not than being provided with the strong point, and direct that sound is put the sound effect and the loudness that are obtained outward is better.Can obtain by test: from reaching the aesthetic feeling of taking into account cell phone appearance and the purpose that strengthens mobile phone sound playback, it is comparatively suitable that strong point height is set to 1.0mm～1.5mm, and the optimum height value of the strong point need be undertaken relatively drawing behind the data test of sound property by test.It is comparatively suitable that distance between the center of the strong point and loudspeaker outlet sound mouth is set to 3mm～5mm.Fig. 4 is that the strong point and the mobile phone each several part position of the mobile phone of embodiment of the present utility model concerns schematic diagram.Mobile phone 401 length that adopt among the embodiment of the present utility model are 112mm, and the strong point 403 is 5mm to the distance between the center of loudspeaker outlet sound mouth 402, mobile phone 401 bottoms to the distance of the strong point 403 in the horizontal direction be projected as 68mm.Above embodiment is to be that example illustrates the position of the strong point and the setting of height with a concrete mobile phone, for different mobile phones, owing to have different size, obtain the optimum position and the height value of the strong point, still can by test test definite.
For conveniently utilizing the function of this hands-free phone meeting, can be mobile phone of the present utility model one hands-free phone conference model is set, user by selecting button or can select to enter this pattern by menu option.Under this pattern, the user can select to use above-mentioned speech processes signaling module to the voice signal of first microphone input disappear echo and noise reduction sonication, with when holding videoconference, obtains preferable sound effect.Certainly, during non-selected hands-free phone meeting modulus, the user also can not select to carry out above-mentioned echo and the noise reduction process of disappearing at the family, but the voice signal input baseband processing module of directly first microphone being collected handles, and launches by radio-frequency module.Above-mentioned selection can select handover module to realize by be provided with one between first gain amplifier and the 4th gain amplifier.When not needing signal to first microphone input to disappear echo and noise reduction process, the signal of first microphone input is directly selected handover module input baseband processing module through this.
Preferably, the mobile phone of the utility model embodiment also has a key mute function, by a button is set, as the mute button among Fig. 3 304, presses this button, can realize that the up words of sending are quiet.This button is mainly used in when mobile phone is in the TeleConference Bridge pattern, and the up words of sending of pressing this button triggering mobile phone are quiet.Concrete application scenarios can be, when enabling the hands-free phone conference model, if our meeting personnel have the important thing discussion and do not want to allow the other side hear, can be under the situation of not cutting off phone, press this button, make we's discussion sound can not be sent to the other side.Exemplarily, when pressing this mute button, triggering command is cut off the signal link of Fig. 2 middle port 225 to port 220, makes voice signal can not be sent on the transmission link of mobile phone by baseband processing module.In addition, can be arranged on when withdrawing from conference call mode, this button is inoperative.The position of mute button is not limited to embodiment shown in Figure 3, and it can be arranged on other position of the handled easily of mobile phone.
The mobile phone of the utility model embodiment by using full range band metallic aluminium composite membrane loudspeaker, can provide big volume and true voice reduction, and be somebody's turn to do kind low frequency frequency response greatly; By using two microphones, one of a voice signal collecting the local terminal caller is collected ambient noise, and the ambient noise in the microphone signal in can filtering input baseband processing module makes that the sound that is sent to the other side is clearer, more outstanding voice; By before the voice signal input baseband processing module that microphone is collected, the voice signal that utilizes preamplifier that microphone is collected amplifies once more, can improve the sensitivity of microphone, thereby and enlarge the radio reception scope of microphone; By before the voice signal input baseband processing module that microphone is collected, this voice signal is eliminated the processing of echo, make the voice signal that has only local terminal that microphone collected, the sound that the other side can not hear oneself; By utilizing above-mentioned means to improve the speech quality of existing mobile phone when the hand-free call, make mobile phone can be used as mobile TeleConference Bridge platform.The technical solution of the utility model provides a kind of framework of mobile portable phone conference system, makes the user utilize mobile phone to hold videoconference, has satisfied the demand of user to mobile phone meeting platform, makes the user can hold videoconference whenever and wherever possible.
The above is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the described principle of the utility model embodiment; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (14)
1. mobile phone comprises: body, and be arranged on first microphone, radio-frequency module, baseband processing module, audio-frequency power amplifier and loudspeaker on the described body, described baseband processing module comprises: the first input end and first output; Described first output is connected with the input of described audio-frequency power amplifier; The output of described audio-frequency power amplifier is connected with described loudspeaker; It is characterized in that described body also comprises:
With the voice signal processing module that described first microphone is connected with baseband processing module, described voice signal processing module comprises:
Second input is connected with described first microphone;
The 3rd input is connected with the output of described audio-frequency power amplifier;
Second output is connected with described first input end;
Be used to receive signal by described second input and the input of the 3rd input, with the signal by the input of described the 3rd input is reference signal to the signal that receives by described second input echo processing that disappears, and will be through the signal of the echo processing that disappears first processing module by described second output output, described first processing module is connected with described second input, the 3rd input and second output.
2. mobile phone according to claim 1 is characterized in that, described voice signal processing module also comprises:
Be used for first preamplifier that amplifies of first microphone signal to input, described first preamplifier is connected with described second input;
Be used for first microphone signal after the described amplification is carried out analog-to-digital conversion, and the signal after will changing imports first analog to digital converter of described first processing module, and described first analog to digital converter is connected with described first processing module with described first preamplifier.
3. mobile phone according to claim 1 and 2 is characterized in that, also comprises:
Second microphone is arranged on the not homonymy of described body with described first microphone.
4. mobile phone according to claim 3 is characterized in that, the distance between the MIC of the MIC of described first microphone and described second microphone is greater than 40mm.
5. mobile phone according to claim 3 is characterized in that described first microphone is arranged on the bottom of described body, and the MIC of described first microphone is arranged on the keyboard face of described body; Described second microphone is arranged on the top of described body, and the MIC of described second microphone is arranged on the side at described body top.
6. mobile phone according to claim 3 is characterized in that, described voice signal processing module also comprises:
Four-input terminal is connected with described second microphone;
Be used to receive microphone signal by described second input and four-input terminal input, second microphone signal according to described four-input terminal input will be by the ambient noise filtering in first microphone signal of described second input input and with second processing module of the signal after the filtering by described second output output, and described second processing module is connected with second output with described second input, four-input terminal.
7. mobile phone according to claim 6 is characterized in that, described signal processing module also comprises:
Be used for second preamplifier that amplifies of second microphone signal to input, described second preamplifier is connected with described four-input terminal;
Be used for second microphone signal after the described amplification is carried out analog-to-digital conversion, and the signal after will changing imports second analog to digital converter of described second processing module, and described second analog to digital converter is connected with described second processing module with described second preamplifier.
8. mobile phone according to claim 1 is characterized in that, described loudspeaker are full range band metallic aluminium composite membrane loudspeaker.
9. mobile phone according to claim 8 is characterized in that, the voice coil loudspeaker voice coil of described loudspeaker is the skeleton voice coil loudspeaker voice coil.
10. according to claim 1,8 or 9 described mobile phones, it is characterized in that the distance between the MIC of the center of described loudspeaker outlet sound mouth and described first microphone is not less than 100mm.
11. according to claim 1,8 or 9 described mobile phones, it is characterized in that, also comprise: have the strong point of height, the outlet sound mouth of the described strong point and described loudspeaker is provided with at interval, and is positioned at the same plane of described fuselage with described loudspeaker outlet sound mouth.
12. mobile phone according to claim 11 is characterized in that, described strong point height is 1.0mm～1.5mm.
13. mobile phone according to claim 12 is characterized in that, the distance between the center of the described strong point and described loudspeaker outlet sound mouth is 3mm～5mm.
14. mobile phone according to claim 1 is characterized in that, also comprises:
Mute button is used for when described mobile phone is in the TeleConference Bridge pattern, and the up words of sending that trigger mobile phone are quiet.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102111468A (en) * | 2010-12-20 | 2011-06-29 | 上海华勤通讯技术有限公司 | Denoising calling mobile phone and method thereof |
| CN102611780A (en) * | 2011-12-19 | 2012-07-25 | 广东步步高电子工业有限公司 | Call terminal for realizing call function without single microphone sound incoming hole |
| CN102624961A (en) * | 2012-02-29 | 2012-08-01 | 华为终端有限公司 | Method and terminal for preventing sound crosstalk between external loudspeaker and microphone |
| CN104618570A (en) * | 2013-10-22 | 2015-05-13 | 诺基亚公司 | Audio capture with multiple microphones |
| CN109273020A (en) * | 2018-09-29 | 2019-01-25 | 百度在线网络技术（北京）有限公司 | Acoustic signal processing method, device, equipment and storage medium |
| CN112802488A (en) * | 2021-01-11 | 2021-05-14 | 成都国恒空间技术工程有限公司 | Satellite communication equipment call audio signal quality optimization design method |
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2009
- 2009-08-12 CN CN200920172907.0U patent/CN201491082U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102111468A (en) * | 2010-12-20 | 2011-06-29 | 上海华勤通讯技术有限公司 | Denoising calling mobile phone and method thereof |
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