CN207820210U - A kind of denoising device based on internet remote teaching - Google Patents
A kind of denoising device based on internet remote teaching Download PDFInfo
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- CN207820210U CN207820210U CN201820180768.5U CN201820180768U CN207820210U CN 207820210 U CN207820210 U CN 207820210U CN 201820180768 U CN201820180768 U CN 201820180768U CN 207820210 U CN207820210 U CN 207820210U
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Abstract
The utility model is related to a kind of denoising devices based on internet remote teaching, the denoising device includes processing chip, audio input interface, wireless input module, signal selection module, audio output module, audio output port and environment microphone, the audio input interface and wireless input module are connect with signal selection module respectively, environment microphone and signal selection module are connect with processing chip respectively, and processing chip is connect with audio output module, audio output module connects audio output port.The denoising device integrated level of the utility model is high, easy to use；Equipment it is versatile；The noise generated during remote teaching or teleconference can be effectively eliminated, uttered long and high-pitched sounds with echo etc., solve the problems, such as that remote teaching or teleconference live sound are ineffective.
Description
Technical field
The utility model is related to Internet education technical fields, and in particular to a kind of noise reduction based on internet remote teaching
Device.The denoising device can be widely applied to IT application in education sector remote teaching and teleconference etc..
Background technology
With the development of digital technology (Digital Technology), more and more people start with internet learning
New knowledge, in education sector, China proposes since the late 1990s and implements IT application in education sector engineering, IT application in education sector
The development of technology is even more to make rapid progress, and student can be given lessons by the teacher of internet viewing thousands of miles away, remote teaching conduct
The supplement of conventional teaching pattern and expansion, are just gradually accepted by people, interactive with the continuous exploration to remote teaching technology
Formula teaching pattern just gradually becomes mainstream.But also there are some technical problems in Mutual Teaching Pattern.
Referring to attached drawing 1, during interactive teaching, teacher's client and student client respectively have a set of teaching equipment,
Teacher's client includes the first microphone and the first speaker, and student client includes second microphone and the second speaker, teacher's
Voice is sent to the second speaker of student client by internet after being acquired by the first microphone, student is hearing teacher's explanation
While voice, the explanation voice of teacher is acquired by second microphone and is sent to the first sound of teacher's client by internet
Case, the sound that the first speaker is sent out are acquired and are sent again by the first microphone, transmission endless loop are formed in cycles, to draw
It rises and utters long and high-pitched sounds and echo, seriously affect effect of listening to the teacher.
Although computer built-in echo in part inhibits function, set up relative complex.It is asked to solve this technology
It inscribes, has following several processing modes in currently available technology：
1. using omnidirectional microphone.Omnidirectional microphone is a kind of collection voice collecting and is played in integrated equipment, both can be with
Sound is played, and the acquisition of sound can be carried out by built-in microphone.Due to omnidirectional microphone built-in sound processing chip,
It is handled in real time by the sound to collected sound and output, according to the voice signal of output to the voice signal of input
Inhibition calculating is carried out, to avoid the generation uttered long and high-pitched sounds.But omnidirectional microphone only using itself play out voice when
It waits, can just obtain preferable chauvent's criterion effect.It is relatively suitble to use in environment such as the smaller meeting rooms in space, works as use
When outer playback box, inhibition can decline to a great extent.
2. using expensive professional sound processing apparatus.It utters long and high-pitched sounds and the sound processing apparatus of profession although may be used with noise
It is handled, but the price of these equipment is too high, can not be promoted and applied on a large scale, so as to cause IT application in education sector
A line teaching classroom can not be deep into.
Invention content
In order to solve the above-mentioned technical problem, the utility model provides a kind of noise reduction dress based on internet remote teaching
It sets.
The technical solution adopted in the utility model is：A kind of denoising device based on internet remote teaching, the noise reduction
Device includes processing chip, audio input interface, wireless input module, signal selection module, audio output module, audio output
Port and environment microphone, the audio input interface and wireless input module are connect with signal selection module respectively, environment wheat
Gram wind and signal selection module are connect with processing chip respectively, and processing chip is connect with audio output module, audio output module
Connect audio output port.
Further, the audio input interface is 3.5mm audio input interfaces.3.5mm audio input interfaces can other than
Connect wire microphone.
Further, the wireless input module supports bluetooth wireless audio frequency transmission function and 2.4G wireless audio frequency transmission functions.Noise reduction
Device can receive the voice signal of wireless microphone by wireless input module.
In use, signal selection module automatically selects the channel of voice input.
Further, the audio output port is usb audio output port or 3.5mm audio output ports.
Further, the denoising device further includes a power supply module, and power supply is provided for denoising device.
Further, the power supply module is lithium battery.
The audio output port of the denoising device of the utility model is usb audio output port or 3.5mm audio outputs
Mouthful.3.5mm audio output ports are directly inserted into the mobile terminal devices such as mobile phone, pad and are used, usb audio output end
The USB interface that computer can be inserted in mouth uses.When using 3.5mm audio output ports, power supply module provides electricity for denoising device
Source, or a USB power supply interface is additionally provided for powering.When using usb audio output port, the USB interface of computer is direct
Power supply is provided for denoising device, power supply module need not be additionally set.
3.5mm audio input interfaces or wireless input module receive the collected teacher of wired or wireless microphone or student
Sound V1, environment microphone acquire background noise V0, since V1 contains background noise V0, and V1 is in addition to background noise V0
Outside, opposite V0 further comprises the teacher of loudness bigger or the sound of student.Processing chip is subtraction Vout=V1-V0 to the two,
After two-way sound subtracts each other, you can background noise is filtered out, to leave behind the larger teacher of loudness in V1 or student
Sound achievees the effect that noise reduction and inhibits to utter long and high-pitched sounds.Before voice output, audio output module carries out sound echo, filter again
The processing such as wave noise reduction, it is ensured that the lamprophonia of output, undistorted.
The operation principle of the utility model：Teacher's client and student client all use the noise reduction of the utility model to fill
It sets, the voice of teacher is sent to the second speaker of student client by internet after the acquisition of the first microphone, student hears
The explanation voice of the explanation voice of teacher, teacher is acquired with background noise by second environment microphone, when student makes a speech, second
The voice of teacher that voice, background noise and the speaker of microphone acquisition student transmits, by the sound of second microphone acquisition with
The sound of second environment microphone acquisition does subtraction, removes the sound of the teacher spread out of in background noise and speaker, and only transmission is learned
Raw speech.When the sound of student is transmitted to teacher's client, principle is identical.
The beneficial effects of the utility model：1, the denoising device integrated level of the utility model is high, only need to be the utility model
Denoising device be inserted on the terminal devices such as mobile phone or computer, microphone is connect with denoising device, two-way noise reduction work(can be realized
Energy；2, denoising device uses 3.5mm audio input interfaces and wireless input module, is substantially all with microphone in the prior art
It can be effectively matched, it is easy to use；3, audio output port uses usb audio output port or 3.5mm audio output ports, can be with
Be connected directly with mobile phone or computer equipment, equipment it is versatile；4, the denoising device of the utility model can effectively eliminate noise,
The problems such as sound effect of attending class brought with echo etc. of uttering long and high-pitched sounds is bad.
Description of the drawings
Fig. 1 is that remote teaching voice transmission causes the schematic diagram uttered long and high-pitched sounds with noise in the prior art；
Fig. 2 is the structure diagram of the utility model denoising device；
Fig. 3 is the denoising device schematic diagram of the utility model 3.5mm audio output ports；
Fig. 4 is the denoising device schematic diagram of the utility model usb audio output port.
Specific implementation mode
Referring to attached drawing 2, a kind of denoising device based on internet remote teaching, the denoising device include processing chip,
Audio input interface, wireless input module, signal selection module, audio output module, audio output port and environment microphone,
The audio input interface and wireless input module are connect with signal selection module respectively, environment microphone and signal selection module
It is connect respectively with processing chip, processing chip is connect with audio output module, and audio output module connects audio output port.
Further, the audio input interface is 3.5mm audio input interfaces.3.5mm audio input interfaces can other than
Connect wire microphone.
Further, the wireless input module supports bluetooth wireless audio frequency transmission function and 2.4G wireless audio frequency transmission functions.Noise reduction
Device can receive the voice signal of wireless microphone by wireless input module.
In use, signal selection module automatically selects the channel of voice input.
Further, the audio output port is usb audio output port or 3.5mm audio output ports.
Further, the denoising device further includes a power supply module, and power supply is provided for denoising device.
Further, the power supply module is lithium battery.
Fig. 3 is the denoising device schematic diagram of the utility model 3.5mm audio output ports, and 3.5mm audio output ports can
It is used with being inserted directly into the mobile terminal devices such as mobile phone.
Fig. 4 is the denoising device schematic diagram of the utility model usb audio output port, and usb audio output port can be inserted
The USB interface for entering computer uses.
It is usb audio output port or 3.5mm audio output that the denoising device of the utility model, which provides audio output port,
The version of port two, when using 3.5mm audio output port versions, built-in power supply module provides power supply for denoising device, or
A USB power supply interface is additionally provided for powering.When using usb audio output port version, the USB interface of computer is directly
Denoising device provides power supply, and power supply module need not additionally be arranged.
Claims (6)
1. a kind of denoising device based on internet remote teaching, the denoising device include processing chip, audio input interface,
Wireless input module, signal selection module, audio output module, audio output port and environment microphone, which is characterized in that institute
It states audio input interface and wireless input module is connect with signal selection module respectively, environment microphone and signal selection module point
It is not connect with processing chip, processing chip is connect with audio output module, and audio output module connects audio output port.
2. denoising device according to claim 1, which is characterized in that the audio input interface is 3.5mm audio inputs
Interface.
3. denoising device according to claim 1, which is characterized in that the wireless input module supports bluetooth wireless audio
Transmission and 2.4G wireless audio frequency transmission functions.
4. denoising device according to claim 1, which is characterized in that the audio output port is usb audio output end
Mouthful.
5. denoising device according to claim 1, which is characterized in that the audio output port is 3.5mm audio output
Port.
6. denoising device according to claim 5, which is characterized in that the denoising device further includes a power supply module,
The power supply module is lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820180768.5U CN207820210U (en) | 2018-02-02 | 2018-02-02 | A kind of denoising device based on internet remote teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820180768.5U CN207820210U (en) | 2018-02-02 | 2018-02-02 | A kind of denoising device based on internet remote teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207820210U true CN207820210U (en) | 2018-09-04 |
Family
ID=63323146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820180768.5U Active CN207820210U (en) | 2018-02-02 | 2018-02-02 | A kind of denoising device based on internet remote teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207820210U (en) |
-
2018
- 2018-02-02 CN CN201820180768.5U patent/CN207820210U/en active Active
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