CN211015980U - Multimedia classroom teaching auxiliary system - Google Patents
Multimedia classroom teaching auxiliary system Download PDFInfo
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- CN211015980U CN211015980U CN201921014930.7U CN201921014930U CN211015980U CN 211015980 U CN211015980 U CN 211015980U CN 201921014930 U CN201921014930 U CN 201921014930U CN 211015980 U CN211015980 U CN 211015980U
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Abstract
The utility model provides a multimedia classroom teaching auxiliary system, including an at least computer terminal, still include the microphone, independent sound card, the speaker, adopted independent sound card to carry out unified receipt and processing to sound signal, the sound signal that can receive computer terminal can receive the sound signal of user when speaking again, the rethread WebRTC technique carries out the transmission of audio frequency, the transmission quality of audio frequency has been guaranteed, can guarantee the quality and the effectual communication of teaching in great classroom, teacher control terminal can also carry out centralized management and control to student terminal through the network in addition, remote control student uses the computer equipment on the terminal, guarantee the quality of teaching.
Description
Technical Field
The utility model relates to a teaching auxiliary system is a multimedia classroom teaching auxiliary system particularly.
Background
The multimedia classroom mainly comprises multimedia computer, projector, electric screen, various application software, digital video exhibition stand, multimedia teaching desk and chair, power amplifier, loudspeaker, microphone, etc., the multimedia teaching mode is popularized rapidly in recent years, the number of multimedia classrooms is increasing, besides some original multimedia classroom construction is centralized, there are many multimedia classrooms transformed, but the computer equipment of many transformed multimedia classrooms is old, and the computer mainboard is usually installed with integrated sound card, and the integrated sound card usually has no collection playback function, i.e. it does not support collecting the sound played by the computer as input, which has much inconvenience in the language teaching environment, in the language teaching, there are usually two sound input sources, one is the sound played by the computer, and the other is the sound spoken by the teacher, the integrated sound card can not input and output the two sounds in a unified way, when a computer audio and video is played, students hear the sounds from the computer or a loudspeaker connected with the computer, when teachers explain the sounds from a microphone of the teachers, and when a classroom is large, acoustic problems such as sound absorption, reflection, diffusion processing and the like exist.
Disclosure of Invention
The utility model discloses an overcome the problem in the background art, provide a multimedia classroom teaching auxiliary system.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a multimedia classroom teaching auxiliary system, includes at least one computer terminal, still includes microphone, independent sound card, speaker, independent sound card has a USB interface, a microphone interface, a speaker interface, independent sound card passes through the USB interface and links to each other with computer terminal, independent sound card passes through the microphone interface and links to each other with the microphone, independent sound card passes through the speaker interface and links to each other with the speaker.
Preferably, the independent sound card is a USB sound card, and the inside of the independent sound card comprises a USB slave and an I2The computer terminal, namely the PC end comprises a USB host, a drive program and application software, and compared with the integrated sound card influenced by the circuit design of the whole mainboard, the onboard integrated sound card is a default audio output parameter given when the mainboard leaves a factory, cannot be randomly adjusted and does not have a collection playback function, electronic components on a circuit board are easy to interfere with each other and increase electrical noise when in work, and the circuit board is not possible to integrate more multi-stage signal amplification elements and noise reduction circuits, so that the output of tone quality signals can be influenced, the tone quality of the output audio is poorer, the independent sound card has more filter capacitors and power amplification tubes, and the signal precision of the output audio of the independent sound card is higher through signal amplification of a plurality of levels and the noise reduction circuits, and the independent sound card has better tone quality output effect, in addition, the independent sound card has a collection playback function and supports collection of sound played by the computer as input, namely the independent sound card can receive sound signals input by the computer, and the sound signals are processed by the independent sound card and then transmitted back to the computer or transmitted to a loudspeaker for playing.
Preferably, the microphone is a condenser microphone, the condenser microphone receives a sound signal of the teacher and transmits the sound signal to the independent sound card, the sound signal is processed by the independent sound card and then transmitted to the computer or a loudspeaker, in this way, the sound signal of the computer and the sound signal of the teacher are processed by the independent sound card, the tone quality of the sound signal is ensured, and the sound signal processed by the independent sound card is transmitted back to the computer to be subjected to audio transmission at the computer terminal.
Preferably, the computer terminals perform audio transmission through a WebRTC technology, i.e., Web Real-time communication, and an audio portion of the WebRTC technology includes devices, codec (i L IBC/iasac/G722/PCM 16/RED/AVT, NetEQ), encryption, sound files, sound processing, sound output, volume control, audio and video synchronization, network transmission, and flow control (RTP/RTCP), where the sound processing is performed on audio data, and includes echo cancellation (AEC), aecm (AEC mobile), Automatic Gain (AGC), noise reduction (NS), and silence detection (VAD) processing, which are used to improve sound quality, so that the quality of audio is ensured when multiple computer terminals transmit audio.
Preferably, the computer terminal divide into teacher's control terminal and student and uses the terminal, the sound signal on the teacher's control terminal, including the sound signal of computer output and the sound signal when the teacher speaks, all can be passed to each student and use the terminal after independent sound card is handled, the rethread student uses the speaker at terminal to broadcast, likewise, the sound signal on the student terminal also can be transmitted to teacher's control terminal and other student's terminals, like this, no matter when the teacher explains or the student answers the problem, the sound signal can not weaken because the classroom is too big, effective communication and exchange in the teaching process have been guaranteed.
Preferably, teacher's control terminal adopts digital network type central control system to carry out centralized management and control to student's user terminal, digital network type central control system includes remote control module, and teacher's control terminal can remote control student's user terminal's computer equipment, and the teacher of being convenient for like this is to student's user terminal's management and control, guarantees the unified management and the teaching quality of teaching in-process.
Compared with the prior art, the utility model discloses possess following advantage and beneficial effect:
the independent sound card is adopted to uniformly receive and process sound signals, the sound signals of the computer terminal can be received, the sound signals when a user speaks can also be received, audio transmission is carried out through the WebRTC technology, the transmission quality of the audio is guaranteed, the teaching quality and effective communication can be guaranteed in a large classroom, in addition, the teacher control terminal can also carry out centralized management and control on the student terminal through a network, the remote control students use the computer equipment on the terminal, and the teaching quality is guaranteed.
Drawings
Fig. 1 is a schematic diagram of an arrangement of a multimedia classroom teaching assistance system.
Fig. 2 is a schematic diagram of a USB sound card data flow.
The reference numerals are explained below: computer terminal 1, microphone 2, independent sound card 3, speaker 4.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the invention.
For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The positional relationships shown in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
example 1
As shown in fig. 1, the multimedia classroom teaching auxiliary system comprises at least one computer terminal 1, a microphone 2, an independent sound card 3 and a loudspeaker 4, wherein the independent sound card 3 comprises a USB interface, an input interface and a loudspeaker interface, the independent sound card 3 is connected with the computer terminal 1 through the USB interface, the independent sound card 3 is connected with the microphone 2 through the microphone interface, and the independent sound card 3 is connected with the loudspeaker through the loudspeaker interface.
In the above scheme, the independent sound card 3 is a USB sound card, and includes a USB slave and an I inside thereof2The computer terminal 1, namely the PC end comprises a USB host, a drive program and application software, and is influenced by the circuit design of the whole mainboard relative to the integrated sound card, the onboard integrated sound card is a default audio output parameter given when the mainboard leaves a factory, cannot be adjusted at will and does not have a collection playback function, electronic components on the circuit board are easy to interfere with each other and increase the electrical noise when in work, and the circuit board is not possible to integrate more multi-level signal amplification elements and noise reduction circuits, so that the output of tone quality signals can be influencedGo out, lead to the tone quality of output audio relatively poor, and independent sound card 3 possesses more filter capacitor and power amplifier tube, through several secondary signal amplification, the circuit of making an uproar falls, the signal precision of independent sound card 3 output audio frequency is higher, there is better tone quality output effect, in addition, independent sound card 3 has the collection playback function, support to gather the sound of computer broadcast as the input, independent sound card 3 can receive the sound signal of computer input promptly, pass back to the computer or transmit loudspeaker 4 and play after independent sound card 3 handles.
In the above scheme, the data flow diagram of the USB sound card is shown in fig. 2, which shows the working principle of the USB sound card, when the PC plays audio, the application software or the driver converts various audio signals into data flows in a unified format, such as PCM, MPEG, etc., and sends the data flows to the USB sound card through the USB interface of the host, and after receiving the data, the USB interface of the sound card sends the data flows to the USB sound card through the I interface2The S interface converts the parallel audio data into serial data, and then sends the serial data to the audio coding and decoding chip for D/A conversion, namely, the audio data can be sounded in a loudspeaker 4 connected with the audio chip; the recording process and the playing process are opposite.
In the above scheme, the microphone 2 is a condenser microphone, the condenser microphone receives a sound signal of a teacher and transmits the sound signal to the independent sound card 3, and the sound signal is processed by the independent sound card 3 and then transmitted to the computer or transmitted to the loudspeaker 4, so that the sound signal of the computer and the sound signal of the teacher are processed by the independent sound card 3, the tone quality of the sound signal is ensured, and the sound signal processed by the independent sound card 3 is transmitted back to the computer to be subjected to audio transmission at the computer terminal 1.
In the above solution, the computer terminals 1 perform audio transmission through a WebRTC technology, i.e., Web Real-time communication, and an audio portion of the WebRTC technology includes devices, codec (i L IBC/iasac/G722/PCM 16/RED/AVT, NetEQ), encryption, sound files, sound processing, sound output, volume control, audio and video synchronization, network transmission, and flow control (RTP/RTCP), where the sound processing is performed on audio data, and includes echo cancellation (AEC), aecm (AEC mobile), Automatic Gain (AGC), noise reduction (NS), and silence detection (VAD) processing, which are used to improve sound quality, so that the quality of audio is ensured when multiple computer terminals 1 transmit audio.
In the above scheme, computer terminal 1 divide into teacher's control terminal and student and uses the terminal, the sound signal on the teacher's control terminal, including the sound signal of computer output and the sound signal when the teacher speaks, all can pass through independent sound card 3 and handle the back and then transmit each student and use the terminal, the rethread student uses the speaker 4 at terminal to broadcast, likewise, the sound signal on the student terminal also can transmit teacher's control terminal and other student's terminals, like this, no matter when the teacher explains or the student answers the problem, the sound signal can not weaken because the classroom is too big, the effective communication and the interchange in the teaching process have been guaranteed.
In the above scheme, teacher's control terminal adopts digital network type central control system to carry out centralized management and control to student user terminal, digital network type central control system includes remote control module, and teacher's control terminal can remote control student user terminal's computer equipment, and the teacher of being convenient for like this is to student user terminal's management and control, guarantees the unified management and the quality of teaching in the teaching process
The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. The utility model provides a multimedia classroom teaching auxiliary system, includes an at least computer terminal (1), its characterized in that still includes microphone (2), independent sound card (3), speaker (4), independent sound card (3) have a USB interface, a microphone interface, a speaker interface, independent sound card (3) link to each other with computer terminal (1) through the USB interface, independent sound card (3) link to each other with microphone (2) through the microphone interface, independent sound card (3) link to each other with speaker (4) through the speaker interface, computer terminal (1) divide into teacher control terminal and student user terminal, teacher control terminal adopts digital network type central control system to carry out centralized management to student user terminal.
2. The multimedia classroom teaching assistance system as claimed in claim 1, wherein said independent sound card (3) is a USB sound card, which includes a USB slave, I2The system comprises an S interface, an audio chip, a loudspeaker interface and a microphone interface.
3. A multimedia classroom teaching assistance system as claimed in claim 1, wherein the microphone (2) is a condenser microphone.
4. The multimedia classroom teaching assistance system as claimed in claim 1, wherein said computer terminals (1) communicate audio with each other via WebRTC (Web Real-Time Communication).
5. The multimedia classroom teaching assistance system as claimed in claim 1, wherein said digital network based central control system includes a remote control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921014930.7U CN211015980U (en) | 2019-07-02 | 2019-07-02 | Multimedia classroom teaching auxiliary system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921014930.7U CN211015980U (en) | 2019-07-02 | 2019-07-02 | Multimedia classroom teaching auxiliary system |
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| Publication Number | Publication Date |
|---|---|
| CN211015980U true CN211015980U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921014930.7U Active CN211015980U (en) | 2019-07-02 | 2019-07-02 | Multimedia classroom teaching auxiliary system |
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| Country | Link |
|---|---|
| CN (1) | CN211015980U (en) |
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2019
- 2019-07-02 CN CN201921014930.7U patent/CN211015980U/en active Active
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