CN218277098U - Bluetooth headset noise reduction system - Google Patents
Bluetooth headset noise reduction system Download PDFInfo
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- CN218277098U CN218277098U CN202222888047.9U CN202222888047U CN218277098U CN 218277098 U CN218277098 U CN 218277098U CN 202222888047 U CN202222888047 U CN 202222888047U CN 218277098 U CN218277098 U CN 218277098U
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Abstract
The utility model discloses a bluetooth headset noise reduction system, if bluetooth headset works under wired mode, outside intelligent terminal's equipment noise is along with sound reentrant to bluetooth module after filtering and gain adjustment, sound of gathering is reentrant to bluetooth module after DSP handles the submodule piece, the noise of gathering is reentrant to bluetooth module through filtering and radio frequency suppression, if bluetooth headset works under wireless mode, bluetooth signal that bluetooth module received and sound of gathering are all reentrant to bluetooth module after DSP handles the submodule piece, the noise of gathering is reentrant to bluetooth module through filtering and radio frequency suppression, under the different mode, finally all produce reverse signal of telecommunication suppression noise by bluetooth module in order to realize initiatively falling, or, produce forward signal of telecommunication by bluetooth module and strengthen the sound wave in order to realize the sound wave enhancement, therefore, no matter bluetooth headset works in wired mode or wireless mode, can both improve bluetooth headset sound quality.
Description
Technical Field
The utility model relates to a bluetooth headset technical field, concretely relates to bluetooth headset noise reduction system.
Background
Bluetooth is a short-distance wireless communication specification with low cost and large capacity, and the Bluetooth headset applies the Bluetooth technology to a hands-free headset, so that a user can avoid annoying wiring and realize free conversation. Because the bluetooth headset can lead to bluetooth transmission ability to descend because of factors such as earphone quality itself, shelter from thing, battery capacity in the use, consequently, the bluetooth cell-phone can be configured with the audio line, is convenient for can also select wired use when wireless function is poor.
Among the prior art, bluetooth headset has the transmission of simulation audio signal in the signal processing link, and simulation audio signal receives external interference easily when the transmission, also has the sound loss simultaneously, leads to the sound quality to reduce easily, and in addition, bluetooth headset when switching between wired and wireless mode of operation, if the audio line does not take off, then outside intelligent terminal's equipment noise passes through the audio line and gets into bluetooth headset, further leads to the sound quality to reduce. Therefore, the noise reduction performance of the Bluetooth headset is to be improved, and the sound quality is improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bluetooth headset noise reduction system provides hardware support for solving the problem that the bluetooth headset sound quality is poor that prior art exists.
The utility model discloses a technical problem is solved to following technical scheme:
a noise reduction system of a Bluetooth headset mainly comprises a Bluetooth module, a sound acquisition module, a noise reduction module and a sound playing module; the noise reduction module comprises a DSP processing submodule, a noise filtering submodule, a radio frequency suppression submodule, a sound filtering submodule and a gain adjustment submodule; the output end of the sound acquisition module is connected with the DSP processing submodule; the DSP processing submodule is connected with the Bluetooth module; the output end of the noise acquisition module is connected with the input end of the noise filtering submodule, the output end of the noise filtering submodule is connected with the input end of the radio frequency suppression submodule, and the output end of the radio frequency suppression submodule is connected with the Bluetooth module; the input end of the sound filtering submodule is connected with an external intelligent terminal through an external audio line, the output end of the sound filtering submodule is connected with the input end of the gain adjusting submodule, and the output end of the gain adjusting submodule is connected with the Bluetooth module; the Bluetooth module is connected with the control end of the sound playing module.
Furthermore, the Bluetooth module is provided with a Bluetooth antenna; the Bluetooth antenna is in wireless connection with an external intelligent terminal.
Further, the device also comprises a touch module; the output end of the touch control module is connected with the Bluetooth module.
Furthermore, an electromagnetic interference suppressor is connected between the grounding terminal of the noise collection module and the grounding terminal of the external audio line.
Further, the electromagnetic interference suppressor is a magnetic bead.
Further, the Bluetooth module and the DSP processing submodule pass through I 2 The S bus transfers data.
Further, the Bluetooth module and the DSP processing submodule pass through I 2 And C, transmitting the command through the bus.
Further, the device also comprises an analog switch module; the output end of the radio frequency suppression submodule is connected with one input end of the analog switch module, the output end of the gain adjustment submodule is connected with the other input end of the analog switch module, and the output end of the analog switch module is connected with the Bluetooth module.
Compared with the prior art, the method has the following characteristics:
1. during communication, if the Bluetooth headset works in a wired working mode, the device noise of an external intelligent terminal is input to the Bluetooth module after being filtered and gain-adjusted along with sound, the collected sound is input to the Bluetooth module after being processed by the DSP processing submodule, the collected noise is input to the Bluetooth module after being filtered and radio frequency suppressed, if the Bluetooth headset works in a wireless working mode, the Bluetooth signal received by the Bluetooth module and the collected sound are input to the Bluetooth module after being processed by the DSP processing submodule, the collected noise is input to the Bluetooth module after being filtered and radio frequency suppressed, and finally, the Bluetooth module generates a reverse electric signal to suppress noise to realize active noise reduction or generates a forward electric signal to enhance sound waves to realize sound wave enhancement under different working modes.
2. The Bluetooth module and the DSP processing submodule pass through I 2 The S bus transmits data, and the audio signal transmission mode has a good noise reduction function, is high in anti-interference capacity and low in sound signal loss, and can effectively improve the sound quality of the Bluetooth headset.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples.
A noise reduction system of a Bluetooth headset mainly comprises a Bluetooth module, a sound acquisition module, a noise reduction module and a sound playing module; the noise reduction module comprises a DSP processing submodule, a noise filtering submodule, a radio frequency suppression submodule, a sound filtering submodule and a gain adjustment submodule; the output end of the sound acquisition module is connected with the DSP processing submodule; the DSP processing submodule is connected with the Bluetooth module; the output end of the noise acquisition module is connected with the input end of the noise filtering submodule, the output end of the noise filtering submodule is connected with the input end of the radio frequency suppression submodule, and the output end of the radio frequency suppression submodule is connected with the Bluetooth module; the input end of the sound filtering submodule is connected with an external intelligent terminal through an external audio line, the output end of the sound filtering submodule is connected with the input end of the gain adjusting submodule, and the output end of the gain adjusting submodule is connected with the Bluetooth module; the Bluetooth module is connected with the control end of the sound playing module.
The Bluetooth module is a core component of the whole system and is provided with a Bluetooth antenna, and the Bluetooth antenna is in wireless connection with an external intelligent terminal and used for sending and receiving Bluetooth signals. The Bluetooth module generates an original audio signal according to the received Bluetooth signal, inputs the original audio signal to the DSP processing submodule for noise reduction processing, and drives the sound playing module to play sound according to signals provided by the DSP processing submodule, the radio frequency suppressor submodule and the gain adjusting submodule. Or, the signal is sent to an external intelligent terminal.
The sound collection module collects analog audio signals, and inputs the collected analog audio signals to the DSP processing submodule for noise reduction processing. And the DSP processing submodule loads an external noise reduction algorithm, performs noise reduction on the analog audio signal, generates a digital audio signal and transmits the digital audio signal to an external intelligent terminal through the Bluetooth module.
The noise collection module collects ambient noise, and the ambient noise is filtered by the noise filtering submodule and then input to the Bluetooth module after the radio-frequency signal is inhibited by the radio-frequency inhibiting submodule. If a plurality of noise acquisition modules exist, 1 noise filtering submodule and 1 radio frequency suppression submodule are correspondingly arranged for each noise acquisition module, and the connection mode of each noise acquisition module and the connection mode of each noise filtering submodule and each radio frequency suppression submodule are the same. The noise filtering submodule is used for filtering low-frequency noise in the noise signal. When the Bluetooth earphone works in a wireless mode, wireless Bluetooth signals can cause interference on signals of the noise acquisition module, and the radio frequency suppression submodule is used for eliminating the interference and mainly filtering out the interference of 2.4GHz high-frequency signals transmitted by the Bluetooth module. When other high-frequency interference exists, the corresponding high-frequency signal can be filtered out by changing the inductive reactance value of the inductor in the radio frequency suppression sub-module.
When the Bluetooth earphone works in a wired mode, the device noise and the sound of the external intelligent terminal enter the sound filtering submodule along the audio line, and then are input into the Bluetooth module through the adjustment of the gain adjustment submodule. The sound filtering submodule is used for filtering low-frequency equipment noise, and the gain adjusting submodule is used for amplifying sound so as to facilitate subsequent signal processing.
Furthermore, the utility model also comprises a touch module; the output end of the touch control module is connected with the Bluetooth module. The touch module mainly comprises a touch sensor, and a user can input an instruction through the touch sensor to control the starting, the stopping, the volume increasing and decreasing, the answering, the hanging up and the like of audio playing.
Noise signals transmitted by external devices through the ground terminal of the audio line are generally radio frequency signals, radio frequency energy is superimposed on an alternating current sine wave component of a direct current transmission level, and the radio frequency energy is useless electromagnetic interference and is transmitted and radiated along the line, so that noise reduction processing of device noise is necessary. The utility model discloses a processing mode is noise acquisition module's ground terminal with connect the electromagnetic interference inhibitor between the ground terminal of outside audio line. The electromagnetic interference suppressor is a magnetic bead. The function of the magnetic beads is mainly to eliminate the radio frequency noise present in the transmission line, the magnetic beads have a very high resistivity and permeability, which is equivalent to a series connection of a resistor and an inductor, but both the resistance and the inductance vary with frequency. The magnetic beads have better high-frequency filtering characteristics than common inductors, and are resistive at high frequency, so that higher impedance can be kept in a quite wide frequency range, and the frequency modulation filtering effect is improved. Of course, the electromagnetic interference suppressor is not limited to be implemented by magnetic beads, and may also be implemented by equivalent series circuits of resistance and inductance or other equivalent circuits.
Further, the Bluetooth module and the DSP processing submodule pass through I 2 The S bus transfers data. The Bluetooth module and the DSP processing submodule pass through I 2 The C bus transmits the instruction. The transmission mode between the Bluetooth module and the DSP processing submodule is I 2 The S digital audio signal transmission mode has a good noise reduction function, strong anti-interference capability and low sound signal loss, and can effectively improve the sound quality of conversation or listening.
Further, the device also comprises an analog switch module; the output end of the radio frequency suppression submodule is connected with one input end of the analog switch module, the output end of the gain adjustment submodule is connected with the other input end of the analog switch module, and the output end of the analog switch module is connected with the Bluetooth module. The analog switch is an alternative switch and is used for switching the connection between the signal after the noise reduction of the environmental noise and the signal after the noise reduction of the equipment noise and the Bluetooth module.
The utility model discloses a mode does:
a user selects a wired working mode or a wireless working mode at a touch module, if the wired working mode is selected, in the conversation process, the device noise and the sound of an external intelligent terminal are input to a Bluetooth module after being subjected to noise reduction through a noise reduction module, in the listening and speaking process of the conversation, the sound collected by a sound collection module and a noise collection module also respectively enter the noise reduction module to be subjected to noise reduction, and the Bluetooth module generates a medium-low frequency noise reverse electric signal or a medium-high frequency forward electric signal according to each output signal of the noise reduction module, so that the sound quality is improved in a noise reduction or sound wave enhancement mode; if the wireless working mode is selected, in the conversation process, the Bluetooth module receives the sound signal of the external intelligent terminal and inputs the sound signal into the noise reduction module to reduce the noise, the sound collected by the sound collection module and the noise collection module also enters the noise reduction module to reduce the noise respectively, and the Bluetooth module generates a medium-low frequency noise reverse electric signal or a medium-high frequency forward electric signal according to each output signal of the noise reduction module to improve the sound quality in a noise reduction or sound wave enhancement mode.
In the electrical field, data transmission, data processing, control and execution of instructions necessarily involve computer programs, and if the computer programs involved are prior art, external programs or simple calculations, comparisons and controls, the technical solutions should not be considered to involve improvements of the computer programs. In the present invention, it has been clearly shown in the specification that this technical solution is to provide hardware support for solving the problem of poor sound quality of the bluetooth headset existing in the prior art, that is, only make contribution on hardware for solving the corresponding technical problem, and accordingly only apply for protection of hardware in the claims, therefore, the present invention should not be considered as relating to improvement of computer programs.
Claims (8)
1. The utility model provides a bluetooth headset noise reduction system which characterized in that:
the system mainly comprises a Bluetooth module, a sound acquisition module, a noise reduction module and a sound playing module; the noise reduction module comprises a DSP processing submodule, a noise filtering submodule, a radio frequency suppression submodule, a sound filtering submodule and a gain adjustment submodule;
the output end of the sound acquisition module is connected with the DSP processing submodule; the DSP processing submodule is connected with the Bluetooth module;
the output end of the noise acquisition module is connected with the input end of the noise filtering submodule, the output end of the noise filtering submodule is connected with the input end of the radio frequency suppression submodule, and the output end of the radio frequency suppression submodule is connected with the Bluetooth module;
the input end of the sound filtering submodule is connected with an external intelligent terminal through an external audio line, the output end of the sound filtering submodule is connected with the input end of the gain adjusting submodule, and the output end of the gain adjusting submodule is connected with the Bluetooth module;
the Bluetooth module is connected with the control end of the sound playing module.
2. The noise reduction system for a bluetooth headset of claim 1, wherein:
the Bluetooth module is provided with a Bluetooth antenna; the Bluetooth antenna is in wireless connection with an external intelligent terminal.
3. The noise reduction system for bluetooth headsets of claim 1, wherein: the device also comprises a touch module; the output end of the touch control module is connected with the Bluetooth module.
4. The noise reduction system for a bluetooth headset of claim 1, wherein:
and an electromagnetic interference suppressor is connected between the grounding terminal of the noise acquisition module and the grounding terminal of the external audio line.
5. The noise reduction system for a bluetooth headset of claim 4, wherein: the electromagnetic interference suppressor is a magnetic bead.
6. The noise reduction system for bluetooth headsets of claim 1, wherein: the Bluetooth module and the DSP processing submodule pass through I 2 The S bus transfers data.
7. The noise reduction system for a bluetooth headset of claim 1, wherein: the Bluetooth module and the DSP processing submodule pass through I 2 The C bus transmits the instruction.
8. The noise reduction system for bluetooth headsets of claim 1, wherein: the device also comprises an analog switch module; the output end of the radio frequency suppression submodule is connected with one input end of the analog switch module, the output end of the gain adjustment submodule is connected with the other input end of the analog switch module, and the output end of the analog switch module is connected with the Bluetooth module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222888047.9U CN218277098U (en) | 2022-10-31 | 2022-10-31 | Bluetooth headset noise reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222888047.9U CN218277098U (en) | 2022-10-31 | 2022-10-31 | Bluetooth headset noise reduction system |
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| Publication Number | Publication Date |
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| CN218277098U true CN218277098U (en) | 2023-01-10 |
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| CN202222888047.9U Active CN218277098U (en) | 2022-10-31 | 2022-10-31 | Bluetooth headset noise reduction system |
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| CN (1) | CN218277098U (en) |
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- 2022-10-31 CN CN202222888047.9U patent/CN218277098U/en active Active
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