Recording noise reduction circuit for electronic student identity card
By setting up an array microphone and main control chip noise reduction module on the electronic student ID card, the problem of poor recording quality is solved and the acquisition of high-quality recording data is achieved.
Patent Information
- Application Number
- CN202422036602.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-22
AI Technical Summary
When recording the existing electronic student ID, the microphone enters the voice, ambient noise and background sound at the same time, resulting in poor recording quality and affecting subsequent analysis and judgment.
The array microphone is used to collect and record recordings at different locations, and the noise reduction process is performed through the built-in noise reduction module of the main control chip. Combined with the independent power supply design of the audio power supply chip, it reduces power crosstalk noise and improves recording quality.
Effectively filter out environmental background noise, improve recording quality, and provide high-quality recording data for subsequent analysis.
Smart Images
Figure CN223092561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of recording noise reduction, in particular to a recording noise reduction circuit for an electronic student ID card. Background Technique
[0002] With the development of the functions of electronic student ID cards, current electronic student ID cards generally have functions such as calling, positioning, and attendance, making their applications in schools more extensive. However, due to demand limitations, existing electronic student ID cards generally only have one microphone for call voice collection. When it is necessary to use the electronic student ID card for recording, the microphone will record voices, environmental noises, and environmental background sounds simultaneously, resulting in poor recording effects, which has an impact on the further analysis and determination that requires the use of this recording. Therefore, a method to improve the recording quality of electronic student ID cards is needed. Content of the Utility Model
[0003] Aiming at the shortcomings and deficiencies in the prior art, the utility model provides a recording noise reduction circuit for an electronic student ID card. By setting an array microphone on the recording circuit to collect environmental recordings at different angles and combining the noise reduction module of the main control chip to perform noise reduction processing on the recordings, the recording quality of the electronic student ID card is effectively improved, providing high-quality recording data for subsequent recording analysis. The structure design is simple, the cost is low, and the practicability is strong.
[0004] To achieve the above objectives, the utility model is realized through the following technical solutions:
[0005] The present application provides a recording noise reduction circuit for an electronic student ID card, including a main control chip, a recording trigger module, a recording module, and an audio power supply chip. The main control chip is built-in with a noise reduction module. The recording trigger module is connected to the main control chip, and the main control chip is respectively connected to the recording module and the audio power supply chip;
[0006] The recording module includes an audio chip and a microphone module, and the audio power supply chip is connected to the audio chip;
[0007] The microphone module is an array microphone, including a first microphone and a second microphone arranged at different positions on the housing of the electronic student ID card.
[0008] Preferably, the main control chip is built-in with a communication module. After the recording trigger module is activated, the main control chip performs noise reduction processing on the recording data obtained by the recording module and sends it to the management platform through the communication module.
[0009] Preferably, the CCLK pin and the CDATA pin of the audio chip are connected to the main control chip for data communication, and the SDOUT / AD2 pin, the SCLK pin, the LRCK pin and the MCLK pin of the audio chip are connected to the main control chip for digital audio signal transmission.
[0010] Preferably, the AINLP / DMIC_SDA pin and the AINLN pin of the audio chip are connected to the first microphone, and its AINRP pin and AINRN pin are connected to the second microphone.
[0011] Preferably, the VIN pin of the audio power supply chip is connected to the power output pin of the battery module, its EN pin is connected to the enable control pin of the main control chip, and its VOUT pin is connected to the power input pin of the audio chip.
[0012] Preferably, the recording trigger module includes a key trigger module and / or a voice trigger module.
[0013] The present utility model has the following beneficial effects:
[0014] For the recording noise reduction circuit of the electronic student ID card of the present utility model, the recording noise reduction circuit is started by the recording trigger module. The main control chip instructs the audio chip to work, and at the same time instructs the audio power supply chip to supply power to the audio chip separately. By separately setting the power supply path for the audio chip, the power supply of the audio part is isolated from other parts, reducing the crosstalk noise interference of multi-path power supply. The microphone module is composed of a separately arranged first microphone and a second microphone to collect voice and background audio at the same time. The main control chip performs noise reduction processing on the recording data obtained by the recording module to filter out the noise of the environmental background and improve the recording quality. Description of the Drawings
[0015] Figure 1 It is a schematic structural block diagram of the recording noise reduction circuit of the electronic student ID card shown in the embodiment of the present utility model;
[0016] Figure 2 It is a schematic circuit connection diagram of the audio chip shown in the embodiment of the present utility model;
[0017] Figure 3 It is a schematic circuit connection diagram of the audio power supply chip shown in the embodiment of the present utility model;
[0018] Figure 4 It is a schematic circuit connection diagram of the microphone shown in the embodiment of the present utility model;
[0019] Figure 5 It is a schematic structural diagram of the electronic student ID card shown in the embodiment of the present utility model.
[0020] In the figure: 1, main control chip; 2, recording trigger module; 3, audio power supply chip; 4, audio chip; 5, first microphone; 6, second microphone; 7, electronic student ID card. Specific implementation mode
[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.
[0022] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0023] Embodiment 1
[0024] At present, campus bullying incidents have received more and more attention and emphasis. To protect the physical and mental health of students, it is necessary to detect bullying behaviors in time, intervene and stop possible bullying incidents in the early stage, and prevent harm. Generally, in schools, bullying behaviors are monitored through monitors or alarms, but due to the limitations of the monitoring range and the density of alarm settings, the timeliness of monitoring will be affected. With the development of the functions of electronic student ID cards, current electronic student ID cards generally have functions such as calling, positioning, and attendance, making their applications in schools more extensive. Therefore, anti-bullying alarms can be made through electronic student ID cards. When a student is bullied, the student ID card is triggered to record, and the recording is uploaded to the management platform in real time. According to the model of the management platform, analysis and judgment are carried out. If a bullying behavior is detected, a series of warning processes are carried out to timely prevent the bullying from deteriorating further. However, due to demand limitations, existing electronic student ID cards generally only have one microphone for call voice collection. When the electronic student ID card is needed for recording, the microphone will record voices, environmental noises, and environmental background sounds at the same time, resulting in poor recording effects, which has an impact on the further analysis and determination using this recording.
[0025] Please refer to Figures 1-5 , to solve the above problems, the present utility model provides a technical solution:
[0026] The present application provides a recording noise reduction circuit for an electronic student ID card, which includes a main control chip 1, a recording trigger module 2, a recording module, and an audio power supply chip 3. The main control chip 1 is built-in with a noise reduction module. The recording trigger module 2 is connected to the main control chip 1, and the main control chip 1 is respectively connected to the recording module and the audio power supply chip 2;
[0027] The recording module includes an audio chip 4 and a microphone module, and the audio power supply chip 3 is connected to the audio chip 4.
[0028] In the embodiment of the present application, the recording noise reduction circuit of the electronic student ID card is started by the recording trigger module 2. The main control chip 1 instructs the audio chip 4 to work, and at the same time instructs the audio power supply chip 3 to supply power to the audio chip 4 separately. By setting a separate power supply path for the audio chip 4, the power supply of the audio part is isolated from other parts, reducing the crosstalk noise interference of multi-path power supply. The main control chip 1 performs noise reduction processing on the recording data obtained by the recording module to filter out the noise of the environmental background and improve the quality of the recording.
[0029] The main control chip 1 is built-in with a communication module. After the recording trigger module 2 is started, the main control chip 1 performs noise reduction processing on the recording data obtained by the recording module and sends it to the management platform through the communication module.
[0030] In the embodiment of the present application, the main control chip 1 can be selected with the model number ASR1603. To ensure the timeliness of recording transmission, after the recording trigger module 2 is started, the main control chip 1 immediately uploads the obtained recording to the management platform through the communication module after noise reduction processing, so that the management platform can obtain the recording data in time for further judgment and analysis.
[0031] The microphone module is an array microphone, which includes a first microphone 5 and a second microphone 6 arranged at different positions on the housing of the electronic student ID card 7.
[0032] In the embodiment of the present application, the numbers of the first microphone 5 and the second microphone 6 are at least one respectively. Among them, the first microphone 5 is the main microphone and can be arranged at the bottom of the housing of the electronic student ID card 7, and the second microphone 6 is the noise reduction microphone and can be arranged at the rear side of the housing of the electronic student ID card 7.
[0033] The CCLK pin and CDATA pin of the audio chip 4 are connected to the main control chip 1 for data communication, and the SDOUT / AD2 pin, SCLK pin, LRCK pin, and MCLK pin of the audio chip 4 are connected to the main control chip 1 for digital audio signal transmission.
[0034] The AINLP / DMIC_SDA pin and AINLN pin of the audio chip 4 are connected to the first microphone 5, and its AINRP pin and AINRN pin are connected to the second microphone 6.
[0035] In the embodiment of the present application, the audio chip 4 can be a high-performance stereo audio analog-to-digital converter with the model number ES7243L, which has a signal-to-noise ratio of 102dB, -85dB THD+N, a sampling frequency of 8 to 200kHz, and an I2S / PCM master or slave serial data port; it supports TDM and has a low-power standby mode.
[0036] As Figure 3 shown, the CCLK pin and CDATA pin of the audio chip 4 are respectively connected to the I2C_3_SCL pin and I2C_3_SDA pin of the main control chip 1. Its SDOUT / AD2 pin, SCLK pin, LRCK pin, and MCLK pin are respectively connected to the ES_DOUT pin, ES_LRCK pin, ES_DSCK pin, and GPIO124_MCLK pin of the main control chip 1.
[0037] The AINLP / DMIC_SDA pin and AINLN pin of the audio chip 4 are connected to the MIC_P pin and MIC_M pin of the first microphone 5, and its AINRP pin and AINRN pin are connected to the MIC2_P pin and MIC2_N pin of the second microphone 6.
[0038] The VIN pin of the audio power supply chip 3 is connected to the power output pin of the battery module, its EN pin is connected to the enable control pin of the main control chip 1, and its VOUT pin is connected to the power input pin of the audio chip 4.
[0039] As Figure 4 shown, in the embodiment of the present application, the model of the audio power supply chip 3 can be BCT2036. The VIN pin of the audio power supply chip 3 is connected to the V_BATT pin of the battery module, its EN pin is connected to the VADC_LDA_EN enable control pin of the main control chip 1, and its VOUT pin is connected to the VADC_1V8 power input pin of the audio chip 4.
[0040] The recording trigger module 2 includes a key trigger module and / or a voice trigger module.
[0041] As Figure 5As shown, in the embodiment of the present application, the button trigger module and the voice trigger module can be simultaneously set in the electronic student ID 7 to trigger recording. Among them, the voice trigger module can be triggered after setting keyword recognition. The button trigger module and the voice trigger module are set simultaneously to improve the timeliness of recording trigger and avoid the inability to trigger the recording instruction due to the inability to access the electronic student ID 7.
[0042] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the outline of each component itself.
[0043] In addition, it should be noted that the use of words such as "first" and "second" to limit the components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning. Therefore, it cannot be understood as a limitation on the protection scope of the present application.
[0044] The above are only the preferred specific embodiments of the present utility model, and the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.
Claims
1. A recording noise reduction circuit for an electronic student ID card, characterized in that, It includes a main control chip (1), a recording trigger module (2), a recording module, and an audio power supply chip (3). The main control chip (1) is built-in with a noise reduction module. The recording trigger module (2) is connected to the main control chip (1), and the main control chip (1) is respectively connected to the recording module and the audio power supply chip (3). The recording module includes an audio chip (4) and a microphone module. The audio power supply chip (3) is connected to the audio chip (4). The microphone module is an array microphone, including a first microphone (5) and a second microphone (6) arranged at different positions on the shell of the electronic student ID (7).
2. The voice recording noise reduction circuit according to claim 1, wherein The main control chip (1) is built-in with a communication module. After the recording trigger module (2) is activated, the main control chip (1) performs noise reduction processing on the recording data obtained by the recording module and sends it to the management platform through the communication module.
3. The voice recording noise reduction circuit according to claim 1, wherein The CCLK pin and CDATA pin of the audio chip (4) are connected to the main control chip (1) for data communication. The SDOUT / AD2 pin, SCLK pin, LRCK pin, and MCLK pin of the audio chip (4) are connected to the main control chip (1) for digital audio signal transmission.
4. The noise reduction circuit for recording according to claim 3, wherein The AINLP / DMIC_SDA pin and AINLN pin of the audio chip (4) are connected to the first microphone (5), and its AINRP pin and AINRN pin are connected to the second microphone (6).
5. The noise reduction circuit for recording according to claim 1, characterized in that, The VIN pin of the audio power supply chip (3) is connected to the power output pin of the battery module. Its EN pin is connected to the enable control pin of the main control chip (1), and its VOUT pin is connected to the power input pin of the audio chip (4).
6. The noise reduction circuit for recording according to claim 1, wherein The recording trigger module (2) includes a key trigger module and / or a voice trigger module.