Video conference device

Abstract

The invention discloses a video conference device, which adopts a camera with a pan-tilt camera control function, simultaneously can manually adjust the angle of each camera pitching by 15 degrees, and is combined with a matrix microphone with an automatic identification function, and the video conference device is placed at the front part of a conference room. The camera can shoot participants in the whole conference room, automatically track spokesmen according to needs, and carry out amplification and focusing; the matrix microphone automatically identifies and judges according to different positions and directions of the spokesman, automatically filters unnecessary noise, collects the sound of the spokesman and amplifies the sound, is convenient to use and simple to connect, can be used for online conference or on-site teaching, and improves the communication efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of conference devices, and in particular relates to a video conference device. Background Art

[0002] In today's era of increasingly popular digital office work and remote collaboration, video conferencing, as a highly efficient means of communication, has been widely used in a variety of fields, including corporate meetings, online teaching, and telemedicine. With the continuous evolution of technology, video conferencing equipment has evolved from basic to complex, and from single-function to diversified.

[0003] Traditional video conferencing equipment is mostly built on dedicated hardware, with a multipoint control unit (MCU) at its core. The MCU handles video and audio stream processing and coordinates communications between participants. It receives video streams uploaded by each terminal, decodes them, synthesizes them into multiple views, and then re-encodes them for transmission to other terminals or a recording server for storage. This traditional architecture ensures video quality stability and security to a certain extent. However, with the increasing diversity of application scenarios and rising user demands, the drawbacks of traditional video conferencing equipment are becoming increasingly apparent.

[0004] Traditional cameras have numerous limitations when it comes to image acquisition. For one thing, their range is often limited, making it difficult to fully capture all attendees in large conference rooms. For example, in a typical rectangular conference room with a large number of attendees, people in the corners or back rows may not be captured clearly, preventing remote participants from obtaining complete information about all attendees and impacting the comprehensiveness of meeting communication. Furthermore, traditional cameras struggle to automatically and accurately track and focus on speakers while they are speaking. In seminars where multiple speakers take turns speaking, if the camera cannot be switched to the speaker and zoomed in and focused in a timely manner, remote participants may struggle to discern important information such as the speaker's facial expressions and body language, reducing communication effectiveness.

[0005] Audio capture also falls short. In multi-person conferences, standard microphones cannot automatically identify the source of sound based on the speaker's location. In temporary meeting rooms repurposed from open office environments, ambient noise (such as the hum of office equipment and people walking around) easily mixes into the audio capture range, resulting in unclear audio. This not only impacts the listening experience for local participants, but also makes it impossible for remote participants to hear the speaker's content, seriously interfering with the accurate transmission of meeting information.

[0006] In terms of device connectivity and ease of use, the installation and commissioning of traditional video conferencing equipment is cumbersome. It often requires complex wiring, involving multiple cables, including video, audio, and network cables, placing high demands on the installation site's environment and layout. In some conference rooms renovated from older buildings, wiring is difficult and costly, and structural limitations may even prevent the ideal wiring solution. Furthermore, the user interface of traditional equipment is complex, requiring specialized personnel for operation and maintenance. For average users, the high learning curve reduces meeting preparation efficiency and limits the wider application of video conferencing.

[0007] Furthermore, there are issues with audio and video signal transmission and terminal compatibility. Traditional video conferencing equipment lacks stability during signal transmission and is susceptible to factors such as network fluctuations and signal interference. In remote areas with poor network conditions or in small businesses with limited bandwidth, screen freezes and audio interruptions are common during meetings. Furthermore, interface compatibility with display terminals (such as large screens) is poor. Different brands and models of devices may require different adapters or drivers, increasing the difficulty of device compatibility, leading to signal transmission interruptions or improper display / playback, disrupting the smooth progress of meetings.

[0008] Existing video conferencing devices have shortcomings in image acquisition, audio processing, device connection and use, signal transmission and terminal adaptation, and are unable to meet the growing demand for efficient, convenient and high-quality remote communication. Summary of the Invention

[0009] The purpose of the present invention is to provide a video conferencing device to solve the following technical problems existing in existing video conferencing devices: the shooting range is limited, which cannot fully cover the participants and is difficult to automatically track and focus on the speaker; ordinary microphones cannot automatically identify the speaker's position and are easily mixed with environmental noise, resulting in unclear audio collection; the equipment connection wiring is complicated, the operation interface is cumbersome, and the installation, debugging and use are inconvenient, requiring professional operation; the audio and video signal transmission stability is poor, it is easy to be interfered with, and the adaptability with the display terminal is low, and the compatibility problem is prominent.

[0010] To solve the above technical problems, the present invention discloses a video conferencing device, comprising a rectangular shell, the shell comprising a front shell and a rear cover, the front shell being equipped with a speaker assembly, a video acquisition module, an audio acquisition module, an antenna and a functional mainboard, the video acquisition module comprising a lens housing, a lens rotating seat, and a camera assembly, the camera assembly being connected to the lens rotating seat via rotating shafts on left and right sides, the lens rotating seat having a bearing seat, one end of the bearing seat being rotatably connected to the rotating shaft, and the other end of the bearing seat being connected to the video acquisition module mounting position on the front shell.

[0011] Preferably, the camera assembly includes a lens, a camera module, a pressure plate and a camera function board, the lens covers the lens hole of the lens housing, the camera module is connected to the pressure plate, and the camera module extends into the collection hole of the lens housing and is fixedly connected.

[0012] Preferably, a rotating rubber ring is sleeved on the rotating shaft, and the rotating rubber ring fills the gap between the rotating shaft and the bearing seat, so that the lens rotating seat and the lens housing rotate together.

[0013] Preferably, the lens rotating seat includes a left rotating seat and a right rotating seat, and the pressure plate is pressed against the left rotating seat and the right rotating seat, so as to synchronously rotate the left rotating seat and the right rotating seat at the same angle.

[0014] Preferably, the camera function board is fixedly mounted on the top of the bracket, the bracket is in an inverted L-shape, the front of the bracket is fixedly connected to the front shell, and an HDMI adapter box is fixed between the front of the bracket and the front shell.

[0015] Preferably, the speaker assembly includes a speaker and a grille, and the grille completely covers the front surface of the front shell.

[0016] Preferably, the rear cover is fixedly mounted with an inverted phase tube, a rocker switch and an interface board, and the interface board is fixedly connected to the rear cover via fixing columns and fixing plates staggered up and down.

[0017] Preferably, the speaker assembly further includes a sound cavity sealing foam, which covers a corresponding position of the speaker on the inner side of the front shell.

[0018] Preferably, the audio acquisition module includes an array microphone and a microphone PCB board, and the audio acquisition module is fixedly mounted on the outside of the front shell, facing the participants.

[0019] Preferably, the video acquisition module integrates a high-performance image processor and is equipped with a target detection and tracking algorithm based on deep learning. The module is connected to a camera with a pan-tilt head and can analyze the images captured by the camera in real time, accurately identify the positions of all participants in the conference room, and adjust the camera pitch angle and pan-tilt head rotation through control instructions to ensure that the shooting range covers the entire conference room. When it is detected that the speaker is linked through the audio module or the lip movement in the picture is recognized, the camera is automatically driven to focus and zoom in on the speaker area, solving the problem that the traditional camera has a limited shooting range and cannot automatically track and focus. The audio acquisition module has a built-in matrix microphone control chip and an adaptive noise reduction circuit. After the multi-channel audio signal collected by the array microphone is transmitted, the speaker's position is quickly locked through the sound source positioning algorithm, and the noise reduction algorithm is activated to filter out environmental noise such as air conditioning sound, keyboard sound, etc., and only the speaker's voice is gain-amplified. The clarity of the processed audio signal is significantly improved, solving the problem that ordinary microphones cannot identify the sound source and are easily mixed with noise.

[0020] Preferably, the hardware connection relationship of the video conferencing device is as follows: the array microphone collects audio signals, the camera assembly collects video signals, the array microphone and the camera assembly signals are connected to the microphone PCB board for digital signal processing; the camera assembly signal is connected to the camera function board for digital signal processing; the microphone PCB board is connected to the function main board via USB, and the function main board adopts a quad-core ARM Cortex-A53 2.0GHz processor, with a GPU ARM Mali-450, a video decoder 4K@60 frames / second, a video encoder 1080P@60 frames / second, DDR 2GB, and 16GB of memory, providing audio and video input, the function main board signal is connected to the speaker for audio output, the USB interface and the HDMI interface are used to connect the panel to display the transmitted video, and it is powered by DC 12V.

[0021] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a video conferencing device, which adopts a camera with a pan-tilt camera control function and can manually adjust the camera angle of 15 degrees in each direction. In combination with a matrix microphone with an automatic recognition function, the video conferencing device is placed in the front of a conference room. The camera can capture the participants in the entire conference room, automatically track the speaker and zoom in and focus as needed; the matrix microphone automatically recognizes and judges the different positions and directions of the speaker, automatically filters out unnecessary noise, and collects the speaker's voice and amplifies it for processing.

[0022] After the video conferencing device disclosed in the present invention collects images and audio, a wireless transmission module is equipped on its internal functional mainboard to transmit the collected signals through a wireless antenna. At the other end, a decoding receiving device with a receiving function receives the wireless audio and video signals and connects them to a display terminal such as a large screen through a TPYE-C or HDMI data cable, and displays and plays them on the display terminal.

[0023] When using this video conferencing device to hold an online meeting, both parties can clearly view and hear all the information of all participants. When a participant speaks, they can focus on the speaker. This video conferencing device is easy to use and simple to connect. It can be used for online meetings or on-site teaching to improve communication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of a video conferencing device according to the present invention.

[0025] Figure 2 This is an exploded view of the video conferencing device of the present invention.

[0026] Figure 3 Schematic diagram of the camera assembly of the video conferencing device of the present invention. Figure 4 This is a hardware architecture block diagram of the video conferencing device of the present invention.

[0027] Figure markings: 1-shell; 2-front shell; 3-back cover; 31-inverter tube; 32-rocker switch; 33-interface board; 4-speaker assembly; 41-speaker; 42-mesh cover; 43-sound cavity sealing foam; 5-video acquisition module; 51-lens housing; 511-rotating shaft; 512-rotating rubber ring; 52-lens rotating seat; 521-left rotating seat; 522-right rotating seat; 523-bearing seat; 53-camera assembly; 531-lens lens; 532-camera module; 533-pressure plate; 534-camera function board; 535-bracket; 6-audio acquisition module; 61-array microphone; 62-microphone PCB board; 7-antenna; 8-function main board. DETAILED DESCRIPTION

[0028] The present invention is further described below with reference to the accompanying drawings and specific embodiments. However, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] See also Figures 1 to 3The present invention discloses a video conferencing device having the following structure: the device includes a rectangular parallelepiped housing 1, which is composed of a front housing 2 and a back cover 3. The front housing 2 is integrally mounted with a speaker assembly 4, a video acquisition module 5, an audio acquisition module 6, an antenna 7, and a functional mainboard 8.

[0030] The video capture module 5 is the core component for image acquisition and processing, and includes a lens housing 51, a lens rotating base 52, and a camera assembly 53. The camera assembly 53 is connected to the lens rotating base 52 via rotating shafts 511 on both sides. The lens rotating base 52 has a bearing seat 523, one end of which is rotatably connected to the rotating shaft and the other end is connected to the video capture module mounting position on the front housing 2. The camera assembly 53 specifically comprises a lens 531, a camera module 532, a pressure plate 533, and a camera function board 534. The lens lens 531 covers the lens hole of the lens housing 221, protecting and optimizing the light intake; the camera module 532 is connected to the pressure plate 533, and the camera module 532 extends into the collection hole of the lens housing 221 and is fixedly connected; the camera function board 534 is fixedly installed on the top of the inverted L-shaped bracket 535, and the front side of the bracket 535 is fixedly connected to the front shell 2, and an HDMI adapter box is fixed between the front side of the bracket 535 and the front shell 2.

[0031] To ensure stable and smooth rotation, a rotating rubber ring 512 is mounted on the rotating shaft 511. The rotating rubber ring 512 fills the gap between the rotating shaft 511 and the bearing seat 523, allowing the lens rotating seat 52 to rotate together with the lens housing 51. The lens rotating seat 52 is divided into a left rotating seat 521 and a right rotating seat 522. The pressure plate 533 is tightly attached to the left rotating seat 521 and the right rotating seat 522, ensuring that the left rotating seat 521 and the right rotating seat 522 rotate synchronously at the same angle.

[0032] Furthermore, the video capture module 5 integrates a high-performance image processor and features a deep learning-based object detection and tracking algorithm. When connected to a camera with a pan / tilt system (PTZ), this module analyzes the captured footage in real time, accurately identifying the positions of all conference room participants. It also adjusts the camera's pitch and pan / tilt rotation via control commands to ensure coverage of the entire conference room. When a speaker is detected via the audio module or lip movements are detected in the image, the camera automatically focuses and zooms in on the speaker's area, effectively addressing the limited range and inability of traditional cameras to automatically track and focus. The pan / tilt system incorporates two micro-stepping motors, one for horizontal rotation and the other for tilt adjustment. The horizontal drive motor is connected to the bearing 523 of the lens swivel mount 52 via a gear train. Each rotation of the motor drives the camera's horizontal rotation by 0.5°, achieving 360° rotation without blind spots. The other, the tilt drive motor, linked to the rotation axis 511 of the camera assembly 53 via a connecting rod, drives the camera's vertical swing around the axis. The adjustment range is strictly controlled to ±15° to prevent it from exceeding the protective range of the lens housing 51. The gimbal's bottom panel features an integrated cable interface, connected to the main functional board 8 via the camera function board 534. This interface receives angle control commands from the main board using PWM pulse signals and provides feedback on the current angle position via a Hall effect sensor. Furthermore, the cable includes a built-in power supply circuit, providing a stable voltage to the stepper motor, ensuring a fast drive response. This structural design enables the gimbal to achieve both automated tracking and full coverage through electric drive, while also accommodating manual adjustment requirements. This provides flexible and reliable mechanical support for the video capture module 5, making it a key component in achieving "no blind spot capture and high-precision tracking."

[0033] The audio acquisition module 6 comprises an array microphone 61 and a microphone PCB 62. It is fixedly mounted on the outside of the front housing 2 and oriented toward the participants, facilitating efficient sound collection. The audio acquisition module 6 incorporates a matrix microphone control chip and adaptive noise reduction circuitry. Upon receiving the multi-channel audio signal captured by the array microphone 61, a sound source localization algorithm is used to quickly locate the speaker. Simultaneously, a noise reduction algorithm is activated to filter out ambient noise, such as air conditioning and keyboard sounds, while amplifying only the speaker's voice. This processed audio signal significantly enhances clarity, resolving the issues with conventional microphones, which often prevent sound sources from being detected and easily mixed with noise.

[0034] The speaker assembly 4 consists of a speaker 41, a mesh cover 42, and a sound cavity sealing foam 43. The mesh cover 42 completely covers the front of the front housing 2, providing protection while not affecting sound transmission. The sound cavity sealing foam 43 covers the inside of the front housing 2 corresponding to the speaker 41, enhancing the sealing of the sound cavity and improving sound quality.

[0035] The rear cover 3 is fixedly mounted with an inverter tube 31, a rocker switch 32 and an interface board 33. The interface board 33 is fixedly connected to the rear cover 3 by fixing columns and fixing plates arranged alternately up and down, ensuring the stability of the connection.

[0036] The hardware connection relationship of the video conferencing device is as follows: the array microphone 61 collects audio signals, the camera assembly 53 collects video signals, the array microphone 61 signal is connected to the microphone PCB board 62 for digital signal processing; the camera assembly 53 signal is connected to the camera function board 534 for digital signal processing; the microphone PCB board and the camera function board 534 are connected to the function main board 8 via USB. The function main board 8 uses a quad-core ARM Cortex-A53 2.0GHz processor, a GPU ARM Mali-450, a video decoder 4K@60 frames / second, a video encoder 1080P@60 frames / second, DDR 2GB, and a memory of 16GB. The video acquisition module 5 and the audio acquisition module 6 provide audio and video input. The function main board 8 signal is connected to the speaker assembly 4 for audio output. A USB interface and an HDMI interface are used to connect the panel to display the transmitted video, and the power supply is DC 12V.

[0037] Through the coordinated cooperation of the above structures, the video conferencing device can achieve high-quality audio and video acquisition, processing and transmission, meet the needs of scenarios such as online meetings or on-site teaching, and effectively improve communication efficiency.

[0038] During use, the video conferencing device operates through audio and video capture, processing, transmission, and interaction. When the rocker switch 32 on the rear cover 3 is turned on and the device is powered on, the functional mainboard 8 boots up and completes initialization. At this point, the camera function board 534 of the video capture module 5 and the microphone PCB 62 of the audio capture module 6 enter operational mode. The lens housing 51 and lens swivel mount 52 return to their initial horizontal and centered positions with a pitch angle of 0°. Antenna 7 initiates wireless signal search, and the HDMI adapter box completes the signal path between the functional mainboard and the device.

[0039] Full-area coverage: The high-performance image processor of the video capture module 5 is activated, and the camera module 532 captures an initial image through the lens 531. Using a deep learning algorithm, the processor analyzes the distribution of participants in the image and sends control commands to the pan / tilt head. If it detects that a person at the edge of the field of view is not included, the bearing seat 523 of the lens rotating mount 52 drives the rotating shaft 511 to rotate, achieving horizontal adjustment. Simultaneously, the left and right rotating mounts 521 and 522 are synchronized, and the pressure plate 533 ensures the same angle of rotation, adjusting the camera pitch angle within a ±15° range until all participants are covered. The rotating rubber ring 512 reduces rotational friction during this process, ensuring smooth angle adjustment.

[0040] Speaker Tracking and Focusing: When the audio acquisition module 6 captures a speaker's voice through the array microphone 61, the sound source localization algorithm locates the speaker's position and transmits the coordinates to the video acquisition module 5. The image processor, combined with lip motion recognition technology, re-confirms the speaker's position and rapidly rotates the pan / tilt head to focus the camera module 532 on the speaker. Simultaneously, the lens focus is controlled to zoom in and focus on the speaker's area, ensuring that the remote terminal clearly displays the speaker's details. If the speaker moves, the processor updates the position in real time, enabling continuous tracking through dynamic adjustment of the rotation axis and bearing seat.

[0041] Sound Source Collection and Noise Reduction: Array microphones 61 synchronously collect multi-channel audio signals and transmit them to the matrix microphone control chip on microphone PCB 62. This chip locates the speaker's position through phase difference analysis and activates an adaptive noise reduction circuit. This circuit filters out ambient noise, such as air conditioning and keyboard sounds, retaining only the speaker's voice signal. Furthermore, a gain amplifier circuit enhances sound intensity to prevent volume loss when speaking from a distance.

[0042] Audio output: The processed audio signal is divided into two transmission paths: one path is transmitted to the speaker 41 of the speaker assembly 4 through the functional mainboard 8, and played through the mesh cover 42 for local participants to listen to. The sound cavity sealing foam 43 reduces sound leakage and improves sound quality; the other path enters the wireless transmission module synchronously with the video signal.

[0043] Signal Encoding and Transmission: Functional motherboard 8 encodes the processed audio and video signals. Typically, video uses the H.265 format and audio uses the AAC format. These signals are wirelessly transmitted via antenna 7 to a decoding and receiving device. If a wired connection is required, a direct connection to a display terminal can be made via the Type-C or HDMI port on the interface board 33 of the rear cover 3, via an HDMI adapter box.

[0044] Remote signal feedback: The audio and video signals of the remote terminal are transmitted back to the functional main board 8 via wireless or wired means. The audio signal drives the speaker 41 to play, and the video signal is transmitted to the display terminal through the camera function board 534 to achieve two-way real-time communication. The inverter 31 of the rear cover 3 optimizes the low-frequency response of the speaker in this process, thereby improving the restoration of the remote sound.

[0045] After the meeting, turn off the rocker switch 32, the device automatically resets the camera to its initial angle before powering off, and all modules enter standby mode. If a temporary interruption is required, the external connection can be disconnected through the interface board 33, or the software interface of the function main board can be directly used to suspend the transmission.

[0046] Through the above process, the device realizes full-link automation from audio and video acquisition, intelligent processing to two-way transmission, ensuring clear images, pure sounds, and smooth interactions during the meeting, meeting the efficiency and stability requirements of remote communication.

[0047] The above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and many similar modifications are possible. All modifications that can be directly derived or imagined by a person skilled in the art from the disclosure of the present invention should be considered to be within the scope of protection of the present invention.

Claims

1. A video conferencing device, characterized in that: The invention comprises a rectangular parallelepiped shell (1), wherein the shell (1) comprises a front shell (2) and a rear cover (3); a speaker assembly (4), a video acquisition module (5), an audio acquisition module (6), an antenna (7) and a functional mainboard (8) are mounted on the front shell (2); the video acquisition module (5) comprises a lens housing (51), a lens rotating seat (52), and a camera assembly (53); the camera assembly (53) is connected to the lens rotating seat (52) via rotating shafts (511) on left and right sides; the lens rotating seat (52) has a bearing seat (523); one end of the bearing seat (523) is rotatably connected to the rotating shaft; the other end of the bearing seat (523) is connected to the video acquisition module mounting position on the front shell (2).

2. The video conferencing device according to claim 1, wherein: The camera assembly (53) comprises a lens (531), a camera module (532), a pressure plate (533) and a camera function board (534); the lens (531) covers the lens hole of the lens housing (221); the camera module (532) and the pressure plate (533) are connected; the camera module (532) extends into the collection hole of the lens housing (221) and is fixedly connected.

3. The video conferencing device according to claim 1, wherein: A rotating rubber ring (512) is sleeved on the rotating shaft (511), and the rotating rubber ring (512) fills the gap between the rotating shaft (511) and the bearing seat (523), so that the lens rotating seat (52) and the lens housing (51) rotate together.

4. The video conferencing device according to claim 2, wherein: The lens rotating seat (52) comprises a left rotating seat (521) and a right rotating seat (522), and the pressing plate (533) is closely attached to the left rotating seat (521) and the right rotating seat (522) and is used for synchronously rotating the left rotating seat (521) and the right rotating seat (522) at the same angle.

5. The video conferencing device according to claim 2, wherein: The camera function board (534) is fixedly mounted on the top of the bracket (535); the bracket (535) is in an inverted L-shape; the front of the bracket (535) is fixedly connected to the front shell (2); and an HDMI adapter box is fixed between the front of the bracket (535) and the front shell (2).

6. The video conferencing device according to claim 1, wherein: The speaker assembly (4) comprises a speaker (41) and a mesh cover (42), wherein the mesh cover (42) completely covers the front surface of the front shell (2).

7. The video conferencing device according to claim 4, wherein: The rear cover (3) is fixedly mounted with an inverted phase tube (31), a rocker switch (32) and an interface board (33); the interface board (33) is fixedly connected to the rear cover (3) via fixing columns and fixing boards that are staggered up and down.

8. The video conferencing device according to claim 6, wherein: The loudspeaker assembly (4) further comprises a sound cavity sealing foam (43), wherein the sound cavity sealing foam (43) covers a corresponding position of the loudspeaker (41) on the inner side of the front shell (2).

9. The video conferencing device according to claim 1, wherein: The audio acquisition module (6) includes an array microphone (61) and a microphone PCB board (62). The audio acquisition module (6) is fixedly installed on the outside of the front shell (2) and faces the participants. The video acquisition module (5) integrates a high-performance image processor and is equipped with a target detection and tracking algorithm based on deep learning. The video acquisition module (5) is connected to a camera assembly with a pan-tilt head (53) to analyze the images captured by the camera in real time, accurately identify the positions of all participants in the conference room, and adjust the camera pitch angle and pan-tilt head rotation through control instructions to ensure that the shooting range covers the entire conference room. The audio acquisition module (6) has a built-in matrix microphone control chip and an adaptive noise reduction circuit. After the multi-channel audio signal collected by the array microphone (61) is input, the speaker's position is quickly locked through a sound source positioning algorithm, and the noise reduction algorithm is started to filter the environmental noise, and only the speaker's voice is amplified.

10. The video conferencing device according to claim 1, wherein: The hardware connection relationship of the video conferencing device is as follows: the array microphone (61) collects audio signals, the camera assembly (53) collects video signals, the array microphone (61) is connected to the microphone PCB board (62) for digital signal processing; the camera assembly (53) is connected to the camera function board (534) for digital signal processing; the microphone PCB board (62) and the camera function board (534) are connected to the function main board (8) via USB, the function main board (8) adopts a quad-core ARM Cortex-A53 2.0GHz processor, with a GPU ARM Mali-450, a video decoder 4K@60 frames / second, a video encoder 1080P@60 frames / second, DDR 2GB, and a memory 16GB, the function main board (8) is connected to the speaker assembly (4) for outputting audio, adopts a USB interface and an HDMI interface for connecting a panel to display the transmitted video, and is powered by DC 12V.

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