CN208285523U - A kind of vehicle-mounted talkback unit - Google Patents
A kind of vehicle-mounted talkback unit Download PDFInfo
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- CN208285523U CN208285523U CN201820677293.0U CN201820677293U CN208285523U CN 208285523 U CN208285523 U CN 208285523U CN 201820677293 U CN201820677293 U CN 201820677293U CN 208285523 U CN208285523 U CN 208285523U
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- resistance
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- microphone input
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- vehicle
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Abstract
The utility model discloses a kind of vehicle-mounted talkback units, vehicle-mounted talkback unit has the first microphone input termi-nal, ear-piece output, second microphone input terminal and audio output, ear-piece output is connect by voice collecting circuit with second microphone input terminal, for exporting the called voice signal of opposite end talk back equipment sending, audio output is played out for called voice signal to be sent to external power amplifying device, first microphone input termi-nal is for acquiring caller voice signal, voice collecting circuit includes the sound channel conversion circuit for converting called voice signal to microphone input signal；Reduce the microphone power circuit of the signal amplitude of microphone input signal；The filter circuit that second microphone input terminal is inputted after the radio noise in microphone input signal is filtered out, vehicle-mounted talkback unit utilizes microphone input signal to eliminate the echo signal being mingled in caller voice signal.The utility model can reduce the difficulty of cost and placement-and-routing.
Description
Technical field
The utility model relates to signal processing technology fields, more particularly to a kind of vehicle-mounted talkback unit.
Background technique
China's rapid economic development in recent years, people also gradually increase the dependence of automobile, people's lives work
All it be unable to do without various types of automobiles.It can be said that people, which have a very long time, daily now is spent on automobile, therefore
How pleasant to spend the time on vehicle in this case, mobile unit comes into being just at an a matter of great account.Each
In class mobile unit, intercommunication function has become the critical function of mobile unit.
However, since closing is compared in interior space, when intercommunication, is easy to echogenicity.Currently, for radio frequency call (packet
Include hand-free call, earphone call and hand-held call etc.) echo cancellation process has all been done on mobile phone, but it is based on mobile network
Echo cancellation process is not done in the intercommunication of (3G, 4G or 5G) but, if echo cancellor chip is arranged in mobile unit, not only can
Increase cost, and product is increasingly miniaturized, for the mobile unit that mainboard closeness is continuously improved, also will increase layout
The difficulty of wiring.
Utility model content
The utility model can reduce cost and cloth mainly solving the technical problems that provide a kind of vehicle-mounted talkback unit
The difficulty of office's wiring.
In order to solve the above technical problems, the technical solution that the utility model uses is: providing a kind of vehicle-mounted intercommunication dress
It sets, the vehicle-mounted talkback unit is used to be wirelessly connected with opposite end talk back equipment, and the vehicle-mounted talkback unit has the first microphone
Input terminal, ear-piece output, second microphone input terminal and audio output, the ear-piece output pass through the voice collecting
Circuit is connect with second microphone input terminal, and the ear-piece output is used to export the called voice letter of opposite end talk back equipment sending
Number, the audio output is played out for the called voice signal to be sent to external power amplifying device, first wheat
For acquiring caller voice signal, the voice collecting circuit includes sequentially connected sound channel conversion circuit, wheat for gram wind input terminal
Gram wind power supply circuit and filter circuit, the sound channel conversion circuit are used for the called voice signal for exporting the ear-piece output
It is converted into microphone input signal；The microphone power circuit for reducing the microphone input signal signal amplitude；
The filter circuit is used for after reducing signal amplitude, filters out the radio noise in the microphone input signal, and will be described
Microphone input signal is input to the second microphone input terminal, so that the vehicle-mounted talkback unit utilizes the microphone
Input signal eliminates the echo signal being mingled in the caller voice signal, and the echo signal is from external power amplifying device.
Wherein, the sound channel conversion circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance, first capacitor
With the second capacitor, the first end of the first resistor connects the L channel end of the ear-piece output, and the of the second resistance
One end connects the right channel end of the ear-piece output, and the first resistor connects 3rd resistor with the second end of second resistance
The first end of first end and first capacitor, the second end of the 3rd resistor connect the first end and the 4th electricity of second capacitor
The first end of resistance, the second end ground connection of the 4th resistance.
Wherein, the microphone power circuit includes the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and third
Capacitor, the first end of the 5th resistance is for inputting microphone bias voltage, the second end connection the 6th of the 5th resistance
First end, the first end of third capacitor and the second end of first capacitor of resistance, the 6th resistance second end connection described in
The second end of first capacitor, the first end of the 7th resistance connect the second end of second capacitor, the 7th resistance
Second end connects the first end of the 8th resistance, the second end of the second end of third capacitor and the second capacitor, the 8th electricity
The second end of resistance is grounded.
Wherein, the filter circuit includes the 4th capacitor, the 5th capacitor and the 6th capacitor, the first end of the 4th capacitor
The second end of ground connection, the 4th capacitor connects the first end of the 5th capacitor and the second end of the 6th resistance, the 5th capacitor
Second end connect the first end of the 6th capacitor and the first end of the 7th resistance, the second end ground connection of the 6th capacitor.
The beneficial effects of the utility model are: being in contrast to the prior art, the voice collecting circuit of the utility model
Be converted into microphone input signal by the called voice signal for issuing opposite end talk back equipment, then to microphone input signal into
After row signal amplitude reduces and filter out radio noise processing, it is input to vehicle-mounted talkback unit, so that vehicle-mounted talkback unit is sharp
The echo signal being mingled in caller voice signal is eliminated with microphone input signal, for setting echo cancellor chip,
The difficulty of cost and placement-and-routing can be reduced.
Detailed description of the invention
Fig. 1 is the voice collecting circuit of the utility model embodiment and the connection relationship diagram of vehicle-mounted talkback unit.
Fig. 2 is the circuit theory schematic diagram of the speech processing module of the vehicle-mounted talkback unit of the utility model embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
It refering to fig. 1, is that the voice collecting circuit of the utility model embodiment and the connection relationship of vehicle-mounted talkback unit are illustrated
Figure.In the utility model embodiment, vehicle-mounted talkback unit 10 is used to be wirelessly connected with opposite end talk back equipment 20, vehicle-mounted talkback unit
10 have the first microphone input termi-nal MIC1, ear-piece output MP3, second microphone input terminal MIC2 and audio output OUT,
Ear-piece output MP3 is connect by voice collecting circuit 30 with second microphone input terminal MIC2, and ear-piece output MP3 is for defeated
The called voice signal that opposite end talk back equipment 20 issues out, audio output OUT are used to called voice signal being sent to outside
Power amplifying device 40 plays out, and the first microphone input termi-nal MIC1 is wrapped for acquiring caller voice signal, voice collecting circuit 30
Sequentially connected sound channel conversion circuit 31, microphone power circuit 32 and filter circuit 33 are included, sound channel conversion circuit 31 is used for will
The called voice signal of ear-piece output MP3 output is converted into microphone input signal；Microphone power circuit 32 for reducing
The signal amplitude of microphone input signal；Filter circuit 33 is used for after reducing signal amplitude, is filtered out in microphone input signal
Radio noise, and microphone input signal is input to second microphone input terminal MIC2, so that vehicle-mounted talkback unit 10
The echo signal being mingled in caller voice signal is eliminated using microphone input signal, echo signal is from external power amplifying device
40。
Vehicle-mounted talkback unit 10 is when needing to send caller voice signal to opposite end talk back equipment 20, due to environment inside car ratio
Compared with closing, when acquiring caller voice signal, if external power amplifying device 40 is playing called voice signal, caller language
Echo signal will be mingled in sound signal, which will echogenicity when being sent to opposite end talk back equipment 20.And this
When the voice collecting circuit of utility model is used in vehicle-mounted talkback unit 10, the signal for being input to vehicle-mounted talk back equipment 10 includes
Caller voice signal, microphone input signal and echo signal, echo signal are entrained in caller voice signal, and echo is believed
Number and microphone input signal both be from called voice signal, therefore, echo signal is consistent with microphone input signal, vehicle-mounted
Talkback unit 10 can eliminate echo signal using microphone input signal, achieve the purpose that eliminate echo, specific to eliminate
Mode the utility model is not construed as limiting, and can use existing echo cancellation algorithm.
It, can be using devices such as resistance, capacitors for the voice collecting circuit of the utility model is compared to echo cancellor chip
Part composition, cost is very low and also layout on the space that accounts for it is also very small.
Refering to fig. 1 and Fig. 2, in the present embodiment, sound channel conversion circuit 31 includes first resistor R1, second resistance R2, the
The first end of three resistance R3, the 4th resistance R4, first capacitor C1 and the second capacitor C2, first resistor R1 connect ear-piece output
The right channel end MP3_R of the first end connection ear-piece output MP3 of the L channel end MP3_L of MP3, second resistance R2, the first electricity
Resistance R1 connects the first end of 3rd resistor R3 and the first end of first capacitor C1,3rd resistor R3 with the second end of second resistance R2
Second end connect the second capacitor C2 first end and the 4th resistance R4 first end, the 4th resistance R4 second end ground connection；
Microphone power circuit 32 includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and third
The first end of capacitor C3, the 5th resistance R5 are for inputting microphone bias voltage Vbias, the second end connection of the 5th resistance R5 the
The second end of first end, the first end of third capacitor C3 and the second end of first capacitor C1 of six resistance R6, the 6th resistance R6 connects
Connecing the second end of first capacitor C1, the first end of the 7th resistance R7 connects the second end of the second capacitor C2, and the of the 7th resistance R7
Two ends connect first end, the second end of the second end of third capacitor C3 and the second capacitor C2 of the 8th resistance R8, the 8th resistance R8
Second end ground connection；
Filter circuit 33 includes the 4th capacitor C4, the 5th capacitor C5 and the 6th capacitor C6, the first termination of the 4th capacitor C4
The second end on ground, the 4th capacitor C4 connects the first end of the 5th capacitor C5 and the second end of the 6th resistance R6, the 5th capacitor C5's
Second end connects the first end of the 6th capacitor C6 and the first end of the 7th resistance R7, the second end ground connection of the 6th capacitor C6.
By the above-mentioned means, the voice collecting circuit of the utility model passes through the called voice that issues opposite end talk back equipment
Signal is converted into microphone input signal, then carries out signal amplitude reduction to microphone input signal and filter out at radio noise
After reason, it is input to vehicle-mounted talkback unit, so that vehicle-mounted talkback unit eliminates caller voice signal using microphone input signal
In the echo signal that is mingled with can reduce the difficulty of cost and placement-and-routing for setting echo cancellor chip.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are also included in the patent protection scope of the utility model.
Claims (4)
1. a kind of vehicle-mounted talkback unit, the vehicle-mounted talkback unit is used to be wirelessly connected with opposite end talk back equipment, which is characterized in that
The vehicle-mounted talkback unit has the first microphone input termi-nal, ear-piece output, second microphone input terminal and audio output,
The ear-piece output is connect by the voice collecting circuit with second microphone input terminal, and the ear-piece output is for defeated
The called voice signal that opposite end talk back equipment issues out, the audio output are used to for the called voice signal being sent to outer
Portion's power amplifying device plays out, and first microphone input termi-nal is for acquiring caller voice signal, the voice collecting circuit
Including sequentially connected sound channel conversion circuit, microphone power circuit and filter circuit, the sound channel conversion circuit is used for institute
The called voice signal for stating ear-piece output output is converted into microphone input signal；The microphone power circuit for reducing
The signal amplitude of the microphone input signal；The filter circuit is used for after reducing signal amplitude, filters out the microphone
Radio noise in input signal, and the microphone input signal is input to the second microphone input terminal, so that
The vehicle-mounted talkback unit eliminates the echo signal being mingled in the caller voice signal, institute using the microphone input signal
Echo signal is stated from external power amplifying device.
2. vehicle-mounted talkback unit according to claim 1, which is characterized in that the sound channel conversion circuit includes the first electricity
Resistance, second resistance, 3rd resistor, the 4th resistance, first capacitor and the second capacitor, the first resistor first end connection described in
The L channel end of ear-piece output, the first end of the second resistance connect the right channel end of the ear-piece output, and described
One resistance connects the first end of 3rd resistor and the first end of first capacitor with the second end of second resistance, the 3rd resistor
Second end connects the first end of second capacitor and the first end of the 4th resistance, the second end ground connection of the 4th resistance.
3. vehicle-mounted talkback unit according to claim 2, which is characterized in that the microphone power circuit includes the 5th electricity
Resistance, the 6th resistance, the 7th resistance, the 8th resistance and third capacitor, the first end of the 5th resistance is for inputting Mike's windage yaw
Voltage is set, the second end of the 5th resistance connects the first end of the 6th resistance, the first end of third capacitor and first capacitor
Second end, the second end of the 6th resistance connect the second end of the first capacitor, the first end connection of the 7th resistance
The second end of second capacitor, the second end of the 7th resistance connect the first end of the 8th resistance, third capacitor
The second end of second end and the second capacitor, the second end ground connection of the 8th resistance.
4. vehicle-mounted talkback unit according to claim 3, which is characterized in that the filter circuit includes the 4th capacitor, the
Five capacitors and the 6th capacitor, the first end ground connection of the 4th capacitor, the second end of the 4th capacitor connect the 5th capacitor
The second end of first end and the 6th resistance, the second end of the 5th capacitor connect the first end and the 7th electricity of the 6th capacitor
The first end of resistance, the second end ground connection of the 6th capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820677293.0U CN208285523U (en) | 2018-05-08 | 2018-05-08 | A kind of vehicle-mounted talkback unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820677293.0U CN208285523U (en) | 2018-05-08 | 2018-05-08 | A kind of vehicle-mounted talkback unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208285523U true CN208285523U (en) | 2018-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820677293.0U Expired - Fee Related CN208285523U (en) | 2018-05-08 | 2018-05-08 | A kind of vehicle-mounted talkback unit |
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| CN (1) | CN208285523U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151012A (en) * | 2020-09-21 | 2020-12-29 | 深圳Tcl新技术有限公司 | Laser induction interaction controller, method and system |
-
2018
- 2018-05-08 CN CN201820677293.0U patent/CN208285523U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151012A (en) * | 2020-09-21 | 2020-12-29 | 深圳Tcl新技术有限公司 | Laser induction interaction controller, method and system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |