CN112601203B - Classroom sound interaction system - Google Patents

Abstract

The invention relates to a classroom sound interaction system. Combining the characteristics of Bluetooth headsets, a classroom interactive system is established, which overcomes the problems of limited space in the classroom, limited sound transmission and noise caused by the use of ordinary loudspeakers in the prior art; the noise collected by the microphone is reduced Then send it to the Bluetooth headset, which greatly improves the clarity of the sound. A new sign-in system has also been established, which is quick and easy, and uses a combination of text passwords, earphone identification and voiceprint recognition to eliminate the possibility of signing on behalf of others.

Description

A Classroom Voice Interaction System

technical field

The invention relates to a teaching device, in particular to a classroom sound interaction system.

Background technique

The interactive teaching system integrates video, audio and data communication, supports rich multimedia teaching and courseware production management, and can realize interactive, live broadcast, on-demand and other teaching modes. An interactive online learning platform system for learning management and knowledge management launched by enterprises.

Existing interactive systems generally focus on the interaction of audio and video, and traditional loudspeakers are generally used for sound transmission. However, when multiple classes are teaching at the same time, the sound of the loudspeaker is very loud and the pertinence is not good. , It is easy to cause other classrooms to receive interference.

In addition, most of the current classrooms require sign-in. The traditional paper-based sign-in is very inefficient, and the electronic punch-in sign-in method is not effective for identification, and it is easy to sign on behalf of or cheat.

Contents of the invention

In view of the above, in order to solve the above problems, a classroom sound interaction system is provided, including a relay host, a computer, a mobile phone, a microphone, and a Bluetooth headset; the relay host can be wirelessly connected to multiple Bluetooth headsets, and each Bluetooth headset has a unique identity Identification information; computers and mobile phones can be wirelessly connected to the relay host, and the computer or mobile phone can obtain the number and identification information of the Bluetooth headsets connected to the relay host from the relay host;

The microphone is wirelessly connected to the relay host, and the sound signal recorded by the microphone can be forwarded to the Bluetooth headset by the relay host in real time.

The relay host includes a main controller, a power supply module, a WIFI module, a multi-device Bluetooth module, a storage module, and a voice recognition module; the main controller is connected to a WIFI module, a multi-device Bluetooth module, a storage module, and a voice recognition module; the power supply module is a WIFI module , the main controller, and the multi-device Bluetooth module for power supply; the multi-device Bluetooth module is used to connect microphones and multiple Bluetooth headsets; the WIFI module is used to connect to computers or mobile phones;

The main controller sends the sound signal obtained from the microphone to the Bluetooth headset after noise reduction processing;

The storage module is used to store the accompanying text password, multiple voiceprint feature data, and identification information and user ID information of multiple Bluetooth headsets;

The sound recognition module can obtain the sound signal uploaded by the bluetooth headset by the main controller, perform text recognition and voiceprint recognition on the sound signal, and send the results of the text recognition and voiceprint recognition to the main controller.

The Bluetooth headset includes a power module, a headset controller, a distance detection module, a headset Bluetooth module, an identification module, a power amplifier module, a radio module, and a sound unit;

The headset controller is connected to the distance detection module, headset Bluetooth module, identity recognition module, power amplifier module, and radio module; the power supply module supplies power for the headset controller, headset Bluetooth module, and power amplifier module;

The headset bluetooth module is used to connect to the relay host and obtain the sound signal from the relay host; the identification information is stored in the identity recognition module, when the headset bluetooth module is connected to the relay host, the relay host obtains the identity identification Information for individual identification of Bluetooth headsets;

The distance detection module is set outside the sound unit of the Bluetooth headset to detect the distance between the sound unit and the person. Only when the distance detected by the distance detection module is less than the threshold, the Bluetooth headset can continue to work, otherwise the Bluetooth headset will automatically turn off after 5 minutes of continuous operation;

The power amplifier module is connected to the sound unit, and the power amplifier module is used to amplify the sound signal sent by the relay host, and make sound through the sound unit;

The radio module is used to collect the sound near the Bluetooth headset, convert the sound into a digital signal and send it to the relay host.

The main controller processes the sound signal obtained from the microphone through noise reduction processing as follows:

The microphone collects the first sound signal, and converts the first sound signal into the first digital sound signal, and then sends the first digital sound signal to the main controller of the relay host; the radio units of multiple bluetooth earphones collect a plurality of second sound signal, and convert the second sound signal into a second digital sound signal, and then send the second digital sound signal to the main controller of the relay host, and the main controller performs signal superposition on multiple second digital sound signals, and Perform volume normalization to obtain a standardized second digital sound signal; the main controller performs fast Fourier transform on the first digital sound signal and the standardized second digital sound signal, and converts them into the first frequency domain signal and the second frequency domain signal in the frequency domain signal; the main controller makes a difference between the first frequency domain signal and the second frequency domain signal, and subtracts the second frequency domain signal in the first frequency domain signal; then performs fast Fourier transform on the differential frequency domain signal after the difference Inverse transform to obtain the differential digital sound signal, so as to realize noise reduction processing.

The classroom interaction system also has a sign-in function, and the specific working method of the sign-in function is as follows:

Send a sign-in start signal to the relay host through the computer or mobile phone, and the relay host enters the sign-in mode;

Input accompanying text password to relay host by computer or mobile phone, described accompanying text password is the text password that the user imports according to one's own preferences; Relay host puts accompanying text password into storage module storage;

The Bluetooth headset establishes a Bluetooth connection with the relay host, and the relay host obtains identification information from the Bluetooth headset;

The sound recognition module obtains the sound signal uploaded by a bluetooth headset from the main controller and performs text recognition and voiceprint recognition on the sound signal, and sends the results of text recognition and voiceprint recognition together with the identification information of the bluetooth headset to Main controller; the main controller compares the text information recognized by the voice recognition module with the accompanying text password in the storage module, and checks whether they match;

If it matches, the main controller compares the voiceprint recognition result of the voice recognition module with the voiceprint feature data stored in the storage module, and obtains the user's first ID information corresponding to the voiceprint information; then the main controller identifies the bluetooth headset The information is matched with the user ID information in the memory to obtain the user's second ID information; the main controller compares whether the first ID information and the second ID information correspond to the same user, and if so, sends the user information to the computer or mobile phone to complete check in.

After the computer or mobile phone sends a sign-in stop signal to the relay host, the relay host exits the sign-in mode.

There are multiple indicator lights on the Bluetooth headset. When the Bluetooth headset is connected to the relay headset, the first indicator light is green; when the Bluetooth headset completes the sign-in and is qualified, the relay host sends a sign-in completion signal to the Bluetooth headset, and the Bluetooth headset The second indicator light of is green;

The bluetooth headset is also provided with a switch for controlling the power switch of the bluetooth headset.

The beneficial effects of the present invention are:

The present invention combines the characteristics of the bluetooth earphone to establish a classroom interactive system. The connection is established through the relay host of the bluetooth earphone, which overcomes the limitation of the classroom in the prior art due to the size of the space, the limitation of sound transmission and the use of ordinary loudspeakers. The problem of noise; in addition, the devices of the present invention are wirelessly connected, can be placed freely, and can be stored at will after use.

The present invention combines the function of the Bluetooth earphone, and then sends the sound collected by the microphone to the Bluetooth earphone after noise reduction, which greatly improves the clarity of the sound, and the noise is collected through the Bluetooth earphone, and the collected noise is superimposed, avoiding a single The difference of the noise source, the noise reduction effect is better.

The present invention also establishes a new sign-in system, which is quick and fast, and uses a combination of in-room text password, earphone identity recognition and voiceprint recognition, which can only be completed after the in-room text password, earphone identity and voiceprint recognition results are all matched Sign in, and the random text password is strong, it is almost impossible to crack or cheat, and the possibility of signing on behalf of others is eliminated.

Description of drawings

The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated in and constitute a part of this specification. The drawings also illustrate implementations of the disclosed subject matter and, together with the detailed description, serve to explain implementation principles of the disclosed subject matter. No attempt has been made to reveal more structural detail than is necessary for a fundamental understanding of the disclosed subject matter and its various ways of practicing it.

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is the functional block diagram of the relay host of the present invention;

Fig. 3 is a functional block diagram of the bluetooth earphone of the present invention;

Fig. 4 is an appearance diagram of the bluetooth earphone of the present invention.

detailed description

The advantages, characteristics, and means for achieving the object of the present invention will be clarified by the accompanying drawings and detailed descriptions that follow.

Example 1:

Combined with Figures 1-4, a classroom sound interaction system includes a relay host 1, a computer 2, a mobile phone 3, a microphone 4, and a Bluetooth headset 5; the relay host 1 can be wirelessly connected to multiple Bluetooth headsets 5, and each Bluetooth headset 5 has unique identification information; the computer 2 and mobile phone 3 can be wirelessly connected to the relay host 1, and the computer 2 or mobile phone 3 can obtain from the relay host 1 the number and identification information of the Bluetooth earphones 5 connected with the relay host 1;

The microphone 4 is wirelessly connected to the relay host 1, the sound signal recorded by the microphone 4 can be forwarded to the Bluetooth headset 5 by the relay host 1 in real time, the Bluetooth headset 5 has a radio function, and the sound signal collected by the Bluetooth headset 5 can be sent to the relay host 1 Perform character recognition and voiceprint recognition.

The relay host 1 includes a main controller, a power supply module, a WIFI module, a multi-device Bluetooth module, a storage module, and a voice recognition module; the main controller is connected to the WIFI module, a multi-device Bluetooth module, a storage module, and a voice recognition module; the power supply module is WIFI The module, the main controller, and the multi-device Bluetooth module provide power; the multi-device Bluetooth module is used to connect the microphone 4 and multiple Bluetooth headsets 5; the WIFI module is used to connect to the computer 2 or mobile phone 3;

The main controller sends the sound signal obtained from the microphone 4 to the Bluetooth headset 5 after noise reduction processing;

The storage module is used to store the accompanying text password, a plurality of voiceprint feature data and identification information and user ID information of a plurality of bluetooth earphones 5;

The sound recognition module can obtain the sound signal uploaded by the bluetooth earphone 5 by the main controller and perform text recognition and voiceprint recognition on the sound signal, and send the results of the text recognition and voiceprint recognition to the main controller.

The bluetooth earphone 5 comprises a power supply module, an earphone controller, a distance detection module, an earphone bluetooth module, an identification module, a power amplifier module, a radio module 54, and a sound unit 53;

The earphone controller is connected to the distance detection module, the earphone bluetooth module, the identification module, the power amplifier module, and the radio module 54; the power supply module supplies power for the earphone controller, the earphone bluetooth module, and the power amplifier module;

The earphone bluetooth module is used to connect to the relay host 1, and obtain the sound signal from the relay host 1; the identification information is stored in the identification module, when the earphone bluetooth module and the relay host 1 are connected, the relay host 1 will identify the The module obtains identification information for individual identification of the Bluetooth headset 5;

The distance detection module is arranged outside the sound unit 53 of the bluetooth earphone 5, and is used to detect the distance between the sound unit 53 and the person. Only when the distance detected by the distance detection module is less than the threshold, the bluetooth earphone 5 can continue to work, otherwise the bluetooth earphone 5 can continue to work Automatically shut down after 5 minutes;

The power amplifier module is connected to the sound unit 53, and the power amplifier module is used to amplify the sound signal issued by the relay host 1, and make a sound through the sound unit 53;

The sound receiving module 54 is used for collecting the sound near the bluetooth earphone 5 , and converting the sound into a digital signal and sending it to the relay host 1 .

Example 2:

This embodiment introduces the noise reduction process.

The main controller processes the sound signal obtained from the microphone 4 through noise reduction processing as follows:

The microphone 4 collects the first sound signal, and converts the first sound signal into the first digital sound signal, and then sends the first digital sound signal to the master controller of the relay host 1; a second sound signal, and convert the second sound signal into a second digital sound signal, and then send the second digital sound signal to the main controller of the relay host 1, and the main controller carries out multiple second digital sound signals. The signals are superimposed, and the volume is normalized to obtain a standardized second digital sound signal; the main controller performs fast Fourier transform on the first digital sound signal and the standardized second digital sound signal, and converts them into the first frequency domain signal and the first frequency domain signal in the frequency domain. The second frequency domain signal; the main controller differentiates the first frequency domain signal and the second frequency domain signal, and subtracts the second frequency domain signal in the first frequency domain signal; then performs the differential frequency domain signal after the difference The fast Fourier inverse transform is used to obtain the differential digital sound signal, thereby realizing noise reduction processing.

Example 3:

This embodiment introduces the sign-in function, and the specific working method of the sign-in function is as follows:

Send a sign-in start signal to the relay host 1 through the computer 2 or the mobile phone 3, and the relay host 1 enters the sign-in mode;

By computer 2 or mobile phone 3, input accompanying text password to relay host 1, described accompanying text password is the text password that the user imports according to one's own preferences; Relay host 1 puts accompanying text password into storage module storage;

The Bluetooth headset 5 establishes a Bluetooth connection with the relay host 1, and the relay host 1 obtains identification information from the Bluetooth headset 5;

The sound recognition module obtains the sound signal uploaded by a bluetooth headset 5 from the main controller and performs character recognition and voiceprint recognition on the sound signal, and combines the results of character recognition and voiceprint recognition with the identification information of the bluetooth headset 5 Send to the main controller; the main controller compares the text information recognized by the voice recognition module with the accompanying text password in the storage module, and checks whether they match;

If matched, then the main controller compares the voiceprint recognition result of the voice recognition module with the voiceprint characteristic data stored in the storage module, and obtains the user's first ID information corresponding to the voiceprint information; The identification information is matched with the user ID information in the memory to obtain the second ID information of the user; the master controller compares whether the first ID information and the second ID information correspond to the same user, and if so, sends the user information to the computer 2 or The mobile phone 3 completes the sign-in.

After the computer 2 or mobile phone 3 sends a sign-in stop signal to the relay host 1, the relay host 1 exits the sign-in mode.

The bluetooth earphone 5 is provided with a plurality of indicator lights, when the bluetooth earphone 5 is connected with the relay earphone, the first indicator light 51 is green; Sign in complete signal, the second indicator light 52 of bluetooth earphone 5 shows green;

The Bluetooth headset 5 is also provided with a switch 55 for controlling the power switch of the Bluetooth headset 5 .

Example 4:

The Bluetooth headset can also be used as an ordinary Bluetooth headset. When in use, the Bluetooth headset can be connected to a mobile phone or other mobile terminal with Bluetooth function. The mobile phone or other mobile terminal sends a digital sound signal to the Bluetooth headset and plays it through the Bluetooth headset; the radio of the Bluetooth headset The module collects sounds and sends them to mobile phones or other mobile terminals to realize the Bluetooth microphone function.

In this way, the Bluetooth headset can be used not only in class, but also in daily use, which greatly improves the utilization rate and avoids waste of resources.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (2)

1. A classroom sound interaction system, comprising a relay host (1), a computer (2), a mobile phone (3), a microphone (4), and a Bluetooth earphone (5); it is characterized in that the relay host (1) can Bluetooth earphones (5) are wirelessly connected, and each bluetooth earphone (5) has unique identification information; the computer (2) and mobile phone (3) can be wirelessly connected to the relay host (1), and the computer (2) or mobile phone (3) can be connected wirelessly. ) can obtain from the relay host (1) the number and identification information of the bluetooth earphones (5) connected with the relay host (1); The microphone (4) is wirelessly connected to the relay host (1), and the sound signal recorded by the microphone (4) can be forwarded by the relay host (1) to the Bluetooth headset (5) in real time. The Bluetooth headset (5) has a radio function, and the Bluetooth headset (5) The collected sound signal can be sent to the relay host (1) for text recognition and voiceprint recognition; The relay host (1) includes a main controller, a power supply module, a WIFI module, a multi-device Bluetooth module, a storage module, and a voice recognition module; the main controller is connected to the WIFI module, a multi-device Bluetooth module, a storage module, and a voice recognition module; the power supply module Provide power for the WIFI module, the main controller, and the multi-device Bluetooth module; the multi-device Bluetooth module is used to connect a microphone (4) and multiple Bluetooth headsets (5); the WIFI module is used to connect to a computer (2) or a mobile phone (3); The main controller sends the sound signal obtained from the microphone (4) to the Bluetooth headset (5) after noise reduction processing; The storage module is used to store the accompanying text password, a plurality of voiceprint feature data and identification information and user ID information of a plurality of bluetooth earphones (5); The sound recognition module is used to obtain the sound signal uploaded by the bluetooth earphone (5) from the main controller and perform text recognition and voiceprint recognition on the sound signal, and send the results of the text recognition and voiceprint recognition to the main controller; The bluetooth earphone (5) includes a power supply module, an earphone controller, a distance detection module, an earphone bluetooth module, an identification module, a power amplifier module, a radio module (54), and a sound unit (53); The earphone controller is connected to the distance detection module, the earphone bluetooth module, the identification module, the power amplifier module, and the radio module (54); the power supply module supplies power for the earphone controller, the earphone bluetooth module, and the power amplifier module; The headset bluetooth module is used to connect to the relay host (1) and obtain sound signals from the relay host (1); the identification information is stored in the identity recognition module, and when the headset bluetooth module and the relay host (1) are connected, the middle The host (1) obtains identification information from the identification module for individual identification of the Bluetooth headset (5); The distance detection module is arranged outside the sound unit (53) of the bluetooth earphone (5), and is used to detect the distance between the sound unit (53) and the person. Only when the distance detected by the distance detection module is less than the threshold, the bluetooth earphone (5) can continue work, otherwise the Bluetooth headset (5) will automatically shut down after working continuously for 5 minutes; The power amplifier module is connected to the sound unit (53), and the power amplifier module is used to amplify the sound signal sent by the relay host (1), and emit sound through the sound unit (53); The radio module (54) is used to collect the sound near the bluetooth earphone (5), and convert the sound into a digital signal and send it to the relay host (1); The main controller processes the sound signal obtained from the microphone (4) through noise reduction processing as follows: The microphone (4) collects the first sound signal, and converts the first sound signal into the first digital sound signal, and then sends the first digital sound signal to the master controller of the relay host (1); a plurality of bluetooth earphones (5 ) collects a plurality of second sound signals, and converts the second sound signals into second digital sound signals, then sends the second digital sound signals to the main controller of the relay host (1), and the main controller will A plurality of second digital sound signals are superimposed, and the volume is normalized to obtain a standardized second digital sound signal; the main controller performs fast Fourier transform on the first digital sound signal and the standardized second digital sound signal, and converts them into frequency The first frequency-domain signal and the second frequency-domain signal in the domain; the main controller differentiates the first frequency-domain signal and the second frequency-domain signal, and subtracts the second frequency-domain signal in the first frequency-domain signal; and then Fast Fourier inverse transform is performed on the differential frequency domain signal after the difference to obtain a differential digital sound signal, thereby realizing noise reduction processing; The classroom interaction system also has a sign-in function, and the specific working method of the sign-in function is as follows: Send a sign-in start signal to the relay host (1) through the computer (2) or mobile phone (3), and the relay host (1) enters the sign-in mode; By computer (2) or mobile phone (3) to relay main frame (1), input accompanying text password, described accompanying text password is the text password that the user imports according to oneself preference; Relay main frame (1) will follow accompanying text password Put into the storage module for storage; The Bluetooth headset (5) establishes a Bluetooth connection with the relay host (1), and the relay host (1) obtains identification information from the Bluetooth headset (5); The sound recognition module obtains the sound signal uploaded by a certain bluetooth earphone (5) from the main controller and performs character recognition and voiceprint recognition on the sound signal, and the results of character recognition and voiceprint recognition and the bluetooth earphone (5) The identification information is sent to the main controller together; the main controller compares the text information recognized by the voice recognition module with the accompanying text password in the storage module, and checks whether they match; If match, then the main controller compares the voiceprint recognition result of the voice recognition module with the voiceprint characteristic data stored in the storage module, and obtains the user's first ID information corresponding to the voiceprint information; then the main controller connects the bluetooth earphone (5 ) is matched with the user ID information in the storage module to obtain the second ID information of the user; the main controller compares whether the first ID information and the second ID information correspond to the same user, and if so, then the user's information Send it to the computer (2) or mobile phone (3) to complete the check-in; After the computer (2) or mobile phone (3) sends a sign-in stop signal to the relay host (1), the relay host (1) exits the sign-in mode. 2. A classroom sound interactive system according to claim 1, characterized in that: The bluetooth earphone (5) is provided with a plurality of indicator lights, after the bluetooth earphone (5) establishes a connection with the relay host, the first indicator light (51) shows green; After the host computer (1) sends a sign-in completion signal to the bluetooth earphone (5), the second indicator light (52) of the bluetooth earphone (5) shows green; The bluetooth earphone (5) is also provided with a switch (55), which is used to control the power switch of the bluetooth earphone (5).

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