Classroom recording system, recording terminal and audio and video terminal

Abstract

The utility model relates to a classroom recording system, a recording terminal and an audio and video terminal. A camera shooting unit, a pickup unit, a video input circuit and an audio input circuit are integrated in the recording terminal, and a camera shooting unit and a pickup unit are integrated in the audio and video terminal. A video signal of a first user side, a video signal of a second user side and a video signal transmitted by a video input circuit can be synchronously acquired and recorded, and an audio signal of the first user side, an audio signal of the second user side and an audio signal transmitted by an audio input circuit can be synchronously acquired and recorded. Through the integrated recording terminal and the audio and video terminal, audio and video acquisition and recording in a teaching scene are realized, external wiring materials are saved, and construction and management difficulty is reduced; and moreover, synchronous recording of multi-side audio and video signals is supported, the requirements of teaching on acquisition of various different audio and video signals can be met, and recording of high-quality teaching resources is realized, so that the teaching quality is improved.

Description

Technical Field

[0001] The present application relates to the field of intelligent teaching technology, and in particular to a classroom recording system, a recording terminal, and an audio and video terminal. Background Art

[0002] With the development of intelligent teaching technology, with the goal of providing high-quality resource sharing, recording equipment, as the terminal hardware equipment of educational informatization, plays a core role in the collection, processing, transmission and recording of audio and video information. At present, recording equipment needs to be equipped with various external devices to realize audio and video information collection and encoding and decoding processing. Due to the large number of wiring and compatibility issues between different devices, it needs to rely on a large number of professionals for deployment, which is prone to abnormal wiring problems and increases the difficulty of construction and management. Utility Model Content

[0003] Based on this, it is necessary to provide a classroom recording system, recording terminal and audio and video terminal to address the above-mentioned technical problems. Through the integrated recording terminal and audio and video terminal, audio and video collection and recording in teaching scenarios can be realized, saving external wiring materials and reducing construction and management difficulties.

[0004] In a first aspect, the present application provides a classroom recording system, the classroom recording system comprising a recording terminal arranged at a first user side and an audio and video terminal arranged at a second user side;

[0005] The recording terminal includes: a first processor; a first camera unit, a video input circuit, a first sound pickup unit, an audio input circuit and a first network unit connected to the first processor;

[0006] The audio and video terminal comprises: a second processor; a second camera unit, a second sound pickup unit and a second network unit connected to the second processor; the second network unit is connected to the first network unit via a network cable;

[0007] The second processor is used to transmit the video signal collected by the second camera unit and the audio signal collected by the second sound pickup unit to the first processor through the second network unit and the first network unit;

[0008] The first processor is used to receive and record the video signal collected by the first camera unit, the video signal transmitted by the video input circuit, and the video signal collected by the second camera unit; the first processor is also used to receive and record the audio signal collected by the first sound pickup unit, the audio signal transmitted by the audio input circuit, and the audio signal collected by the second sound pickup unit.

[0009] In one of the embodiments, the first processor includes a first chip and a first digital signal processor connected to each other;

[0010] The first chip is connected to the first camera unit, the video input circuit and the first network unit;

[0011] The first digital signal processor is connected to the first sound pickup unit, the audio input circuit and the first network unit;

[0012] Among them, the first chip is used to receive and record the video signal collected by the first camera unit, the video signal transmitted by the video input circuit, and the video signal collected by the second camera unit; the first digital signal processor is used to receive and record the audio signal collected by the first sound pickup unit, the audio signal transmitted by the audio input circuit, and the audio signal collected by the second sound pickup unit.

[0013] In one of the embodiments, the recording terminal further includes a first video output circuit connected to the first chip;

[0014] The first chip is also used to output the recorded video signal through the first video output circuit.

[0015] In one embodiment, the recording terminal further comprises an audio output circuit connected to the first digital signal processor; the audio output circuit is connected to a built-in or external sound amplification unit;

[0016] Wherein, the first digital signal processor is also used to transmit the recorded audio signal to the sound amplification unit through the audio output circuit.

[0017] In one embodiment, the first network unit includes an external network interface; the external network interface is connected to the streaming unit via a local area network;

[0018] Among them, the first digital signal processor is used to transmit the recorded audio signal to the first chip; the first chip is also used to output the recorded video signal and the recorded audio signal to the streaming unit through the external network interface.

[0019] In one embodiment, the second processor includes a second chip and a second digital signal processor connected to each other;

[0020] The second chip is connected to the second camera unit and the second network unit;

[0021] The second digital signal processor is connected to the second sound pickup unit and the second network unit;

[0022] Among them, the second chip is used to transmit the video signal collected by the second camera unit to the first processor through the second network unit and the first network unit; the second digital signal processor is used to transmit the audio signal collected by the second sound pickup unit to the first processor through the second network unit and the first network unit.

[0023] In one of the embodiments, the audio and video terminal further includes a second video output circuit connected to the second chip;

[0024] The second chip is further used to output the video signal collected by the second camera unit through the second video output circuit.

[0025] In one of the embodiments, at least one of the first camera unit and the second camera unit includes a panoramic camera and a close-up camera.

[0026] In a second aspect, the present application provides a recording terminal, which is arranged at a first user side, and includes:

[0027] A first processor; a first camera unit, a video input circuit, a first sound pickup unit, an audio input circuit, and a first network unit connected to the first processor; the first network unit is connected to an audio and video terminal disposed at a second user side via a network cable;

[0028] Wherein, the first network unit is used to transmit the audio signal and the video signal of the second user side collected by the audio and video terminal to the first processor;

[0029] The first processor is used to receive and record the video signal collected by the first camera unit, the video signal transmitted by the video input circuit, and the video signal collected by the audio and video terminal; the first processor is also used to receive and record the audio signal collected by the first sound pickup unit, the audio signal transmitted by the audio input circuit, and the audio signal collected by the audio and video terminal.

[0030] In a third aspect, the present application provides an audio and video terminal, which is arranged at a second user side, and includes:

[0031] A second processor; a second camera unit, a second sound pickup unit, and a second network unit connected to the second processor; the second network unit is connected to a recording terminal disposed at the first user side via a network cable;

[0032] The second processor is used to transmit the video signal collected by the second camera unit and the audio signal collected by the second sound pickup unit to the recording terminal through the second network unit for recording.

[0033] In the above-mentioned classroom recording system, recording terminal and audio and video terminal, the classroom recording system includes a recording terminal arranged on the first user side and an audio and video terminal arranged on the second user side; the recording terminal includes: a first processor; a first camera unit, a video input circuit, a first sound pickup unit, an audio input circuit and a first network unit connected to the first processor; the audio and video terminal includes: a second processor; a second camera unit, a second sound pickup unit and a second network unit connected to the second processor; the second network unit is connected to the first network unit through a network cable; wherein the second processor transmits the video signal collected by the second camera unit and the audio signal collected by the second sound pickup unit to the first processor through the second network unit and the first network unit; the first processor receives and records the video signal collected by the first camera unit, the video signal transmitted by the video input circuit, and the video signal collected by the second camera unit; the first processor receives and records the audio signal collected by the first sound pickup unit, the audio signal transmitted by the audio input circuit, and the audio signal collected by the second sound pickup unit. Through the above method, the camera unit, the sound pickup unit, the video input circuit and the audio input circuit are integrated in the recording terminal, and the camera unit and the sound pickup unit are integrated in the audio and video terminal. By cooperating with the audio and video terminal, the video signal on the first user side, the video signal on the second user side and the video signal transmitted by the video input circuit can be synchronously collected and recorded, and the audio signal on the first user side, the audio signal on the second user side and the audio signal transmitted by the audio input circuit can be synchronously collected and recorded. Through the integrated recording terminal and audio and video terminal, audio and video collection and recording in teaching scenarios are realized, external wiring materials are saved, and the construction and management difficulties are reduced; and it supports synchronous recording of audio and video signals on multiple sides, which can meet the teaching needs for the collection of various audio and video signals, and realize the recording of high-quality teaching resources, thereby improving the teaching quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a schematic diagram of the layout of a conventional recording system;

[0035] FIG2 is a schematic diagram of the layout of another conventional recording system;

[0036] FIG3 is a schematic diagram of the layout of a conventional recording system in an embodiment of the present utility model;

[0037] FIG4 is a schematic diagram of the circuit structure of a classroom recording system in one embodiment;

[0038] FIG5 is a schematic diagram of the circuit structure of a classroom recording system in another embodiment;

[0039] FIG6 is a schematic diagram of a recording terminal in an example;

[0040] FIG7 is a schematic diagram of an audio and video terminal in an example;

[0041] FIG8 is a schematic diagram of the structure of a recording terminal in one embodiment;

[0042] FIG. 9 is a schematic diagram of the structure of an audio and video terminal in one embodiment. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that in the present application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have the transmission of electrical signals or data with each other.

[0045] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0046] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] At present, recording equipment needs to be equipped with various external devices to realize audio and video information collection and encoding and decoding processing. Referring to Figure 1, Figure 1 shows the layout of a traditional recording system. In a traditional recording system, the recording equipment is equipped with two sets of cameras, one set of cameras is used to shoot the teacher area, and the other set of cameras is used to shoot the student area. In addition, since the recording equipment does not have the ability to pick up sound in a teaching environment, it needs to be equipped with peripherals such as a pickup microphone and an audio processor to realize audio collection. Due to the large number of wiring and compatibility issues between different devices, it is necessary to rely on a large number of professionals for deployment, which is prone to abnormal wiring problems, increasing the difficulty of construction and management.

[0048] Refer to Figure 2, which shows the layout of another traditional recording system. In this traditional recording system, due to the combination of multiple cameras such as student panoramic view, student close-up view, teacher panoramic view and teacher close-up view, and a wireless microphone installed in the student area, more peripherals and wiring need to be installed in the student area and teacher area in the classroom, which makes it difficult to build the recording system and increases the difficulty of construction. The diversity of equipment is not conducive to normal use, which increases the difficulty of operation and maintenance of the recording system.

[0049] Based on this, in the present application, a camera unit, a sound pickup unit, a video input circuit, and an audio input circuit are integrated in the recording terminal, and a camera unit and a sound pickup unit are integrated in the audio and video terminal. Through the cooperation of the recording terminal and the audio and video terminal, the video signal of the first user side, the video signal of the second user side, and the video signal transmitted by the video input circuit can be synchronously collected and recorded, and the audio signal of the first user side, the audio signal of the second user side, and the audio signal transmitted by the audio input circuit can be synchronously collected and recorded. Through the integrated recording terminal and the audio and video terminal, the audio and video collection and recording in the teaching scene are realized, which saves external wiring materials and reduces the construction and management difficulty; and supports the synchronous recording of multi-side audio and video signals, which can meet the teaching needs for the collection of various different audio and video signals, and realize the recording of high-quality teaching resources, thereby improving the teaching quality. Referring to Figure 3, Figure 3 shows the layout of the traditional recording system in the embodiment of the present utility model. Since the recording terminal is set on the first user side (student area) and the audio and video terminal is set on the second user side (teacher area) in the present application, it is only necessary to connect the recording terminal and the audio and video terminal through a network cable to complete the construction of the classroom recording system, and the external wiring is far less than the traditional recording system.

[0050] Referring to FIG. 4 , FIG. 4 is a schematic diagram of a circuit structure of a classroom recording system in an embodiment. The classroom recording system 100 provided in an embodiment of the present application includes a recording terminal 200 disposed at a first user side and an audio and video terminal 300 disposed at a second user side;

[0051] The recording terminal 200 includes: a first processor 201; a first camera unit 202, a video input circuit 203, a first sound pickup unit 204, an audio input circuit 205 and a first network unit 206 connected to the first processor 201;

[0052] The audio and video terminal 300 includes: a second processor 301; a second camera unit 302, a second sound pickup unit 303 and a second network unit 304 connected to the second processor 301; the second network unit 304 is connected to the first network unit 206 via a network cable;

[0053] The second processor 301 is used to transmit the video signal collected by the second camera unit 302 and the audio signal collected by the second sound pickup unit 303 to the first processor 201 through the second network unit 304 and the first network unit 206;

[0054] The first processor 201 is used to receive and record the video signal collected by the first camera unit 202, the video signal transmitted by the video input circuit 203, and the video signal collected by the second camera unit 302; the first processor 201 is also used to receive and record the audio signal collected by the first sound pickup unit 204, the audio signal transmitted by the audio input circuit 205, and the audio signal collected by the second sound pickup unit 303.

[0055] In the teaching scenario, the first user side may be the student side, and the second user side may be the teacher side; in the conference scenario, the first user side may be the lecture side, and the second user side may be the speaker side. The first processor 201 and the second processor 301 may be SOC (System on a Chip) chips, which have audio processing capabilities and video processing capabilities. The video signal is an electrical signal for transmitting image information. The first camera unit 202 integrated in the recording terminal 200 may be a binocular camera. In some implementations, the first processor 201 is configured to receive at least one of the video signals collected by the first camera unit 202 (hereinafter referred to as the first video signal), the video signal transmitted by the video input circuit 203 (hereinafter referred to as the second video signal), and the video signal collected by the second camera unit 302 (hereinafter referred to as the third video signal), and record the received video signals. For example, in some recording scenarios, the first processor 201 can only record the video signal of the first user side; for another example, in some recording scenarios, the first processor 201 can record the video signals of the second user side and the first user side; for another example, in some recording scenarios, the first processor 201 can record the video signal of the first user side and the second video signal. Similarly, in some implementations, the first processor 201 is configured to receive at least one of the audio signals collected by the first sound pickup unit 204 (hereinafter referred to as the first audio signal), the audio signal transmitted by the audio input circuit 205 (hereinafter referred to as the second audio signal), and the audio signal collected by the second sound pickup unit 303 (hereinafter referred to as the third audio signal), and record the received video signals.

[0056] In one implementation, according to the teaching recording requirements, the first processor 201 performs picture synthesis processing and encoding processing on at least two video signals among the first video signal, the second video signal, and the third video signal, and records the processed video signals; the first processor 201 performs multi-microphone fusion processing on at least two audio signals among the first audio signal, the second audio signal, and the third audio signal, and records the processed audio signals.

[0057] In one implementation, the video input circuit 203 includes an HDMI (High Definition Multimedia Interface) input interface and a video switching circuit, and the video switching circuit (e.g., an HDMI to MIPI switching circuit) is used to convert the video stream received by the HDMI input interface into a video signal that can be processed by the first processor 201. Optionally, the maximum supported input resolution of HDMIIN is 3840*2160@30Hz. The video signal transmitted by the video input circuit 203 refers to courseware, demonstration videos, or blackboard screens from devices such as computers or teaching all-in-one machines, etc. In one implementation, the HDMI input interface supports audio input, and the first processor 201 is also used to receive and record a first audio signal, a second audio signal, a third audio signal, and an audio signal transmitted through the HDMI input interface.

[0058] In one implementation, the first network unit 206 includes a first intranet interface, the second network unit 304 includes a second intranet interface, and the first intranet interface and the second intranet interface are connected via an intranet network. Optionally, the first network unit 206 or the second network interface includes a switching chip and at least one network interface, and the first intranet interface and the second intranet interface are gigabit network interfaces and support POE (Power over Ethernet) function.

[0059] The audio input circuit 205 includes an audio processing subsystem (e.g., an AUDIO ADC chip) and an audio input interface, and the audio input interface may be a linear input interface (LINE IN). The first sound pickup unit 204 may be a sound pickup microphone. In one implementation, the first sound pickup unit 204 and the second sound pickup unit 303 are array microphones, such as eight array microphones. The first sound pickup unit 204 and the second sound pickup unit 303 may also be wireless microphone receivers, connected to a wireless microphone to obtain audio signals collected by the wireless microphone.

[0060] In some implementations, the classroom recording system 100 has functions such as video acquisition and output, audio acquisition and output, audio and video streaming media processing, intelligent AI analysis, intelligent tracking, audio and video recording and live broadcast, etc.

[0061] In this embodiment, a camera unit, a sound pickup unit, a video input circuit, and an audio input circuit are integrated in the recording terminal, and a camera unit and a sound pickup unit are integrated in the audio and video terminal. By cooperating with the audio and video terminal, the video signal on the first user side, the video signal on the second user side, and the video signal transmitted by the video input circuit can be synchronously collected and recorded, and the audio signal on the first user side, the audio signal on the second user side, and the audio signal transmitted by the audio input circuit can be synchronously collected and recorded. Through the integrated recording terminal and audio and video terminal, audio and video collection and recording in teaching scenarios are realized, external wiring materials are saved, and the construction and management difficulties are reduced; and it supports synchronous recording of audio and video signals on multiple sides, which can meet the teaching needs for the collection of various audio and video signals, and realize the recording of high-quality teaching resources, thereby improving the teaching quality.

[0062] In one implementation, referring to FIG. 5 , which is a schematic diagram of a circuit structure of a classroom recording system in another embodiment, a first processor 201 includes a first chip 207 and a first digital signal processor 208 connected to each other;

[0063] The first chip 207 is connected to the first camera unit 202, the video input circuit 203 and the first network unit 206;

[0064] The first digital signal processor 208 is connected to the first sound pickup unit 204, the audio input circuit 205 and the first network unit 206;

[0065] Among them, the first chip 207 is used to receive and record the video signal collected by the first camera unit 202, the video signal transmitted by the video input circuit 203, and the video signal collected by the second camera unit 302; the first digital signal processor 208 is used to receive and record the audio signal collected by the first sound pickup unit 204, the audio signal transmitted by the audio input circuit 205, and the audio signal collected by the second sound pickup unit 303.

[0066] The first processor 201 includes a first chip 207 (such as a SOC chip) and a first digital signal processor 208 (DSP) that are communicatively connected to each other. The first chip 207 is used to collect video signals, synthesize images, record, etc., and the first digital signal processor 208 is used to collect audio signals, mix, process, record, etc. The first digital signal processor 208 can perform intelligent mixing settings according to environmental application requirements, and can perform dynamic gain, echo suppression, noise reduction, and anti-howling algorithm processing.

[0067] By setting the first chip 207 to process the video signal and setting the first digital signal processor 208 to process the audio signal, parallel processing of audio and video can be achieved. The first chip 207 and the first digital signal processor 208 run in parallel, which improves the efficiency of audio and video acquisition and recording.

[0068] In one implementation, referring to FIG5 , the recording terminal 200 further includes a first video output circuit 209 connected to the first chip 207 ;

[0069] The first chip 207 is also used to output the recorded video signal through the first video output circuit 209 .

[0070] Among them, the first video output circuit 209 includes an HDMI output interface and a USB output interface. The recording terminal 200 supports video output, and the HDMI output interface (HDMI OUT) or the USB output interface can be connected to a third-party device for video screen display. The third-party device can be a mobile phone, a computer, a TV, a display screen and other devices. In one implementation, the HDMI output interface supports embedded audio stream output, and the first chip 207 is also used to output the recorded audio signal through the HDMI output interface. Optionally, the maximum supported output resolution of HDMI OUT is 3840*2160@30Hz. Among them, the USB output interface can be a USB2.0 interface for realizing the UXC function. The UXC function refers to the integrated function of UVC (USB AUDIO class) and UAC (USB video class). The recording terminal 200 of this embodiment can be used as a USB camera, USB microphone, USB audio and other devices to provide classroom audio and video recording functions for third-party devices. Optionally, the first chip 207 converts the video signal into a TMDS signal and transmits it to the HDMI output interface.

[0071] Optionally, the first chip 207 outputs the real-time recorded video signal through an HDMI output interface or a USB output interface; optionally, the first chip 207 reads a pre-recorded video signal from a storage unit and outputs it through an HDMI output interface or a USB output interface.

[0072] By setting up a video output circuit to connect to a third-party device for video display, in a teaching scenario, it can provide students with a visual image, making it easier for them to view the teaching video, which helps improve teaching quality and learning outcomes.

[0073] In one implementation, referring to FIG. 5 , the recording terminal 200 further includes an audio output circuit 210 connected to the first digital signal processor 208 ; the audio output circuit 210 is connected to a built-in or external sound amplification unit 211 ;

[0074] The first digital signal processor 208 is further configured to transmit the recorded audio signal to the sound amplification unit 211 via the audio output circuit 210 .

[0075] The audio output circuit 210 includes a codec (e.g., an AUDIO CODEC chip) and an audio output interface, and the audio output interface may be a linear output interface (LINE OUT). The codec compiles the recorded audio signal into an audio signal that can be played by the loudspeaker unit 211, and transmits the audio signal to the loudspeaker unit 211 through the audio output interface for playback. The loudspeaker unit 211 is a speaker or a sound, and the loudspeaker unit 211 may be disposed inside the recording terminal 200 or outside the recording terminal 200. Optionally, the audio output circuit 210 is connected to the first digital signal processor 208 via an I2S bus.

[0076] Optionally, the first digital signal processor 208 transmits the real-time recorded audio signal to the sound amplification unit 211 through the audio output circuit 210; optionally, the first digital signal processor 208 reads the pre-recorded audio signal from the storage unit and transmits it to the sound amplification unit 211 through the audio output circuit 210.

[0077] By setting the audio output circuit to output the audio signal to the loudspeaker unit, in the teaching scenario, the teacher's speech or teaching audio is played through the loudspeaker unit, making the sound received by the students clearer and louder, and improving the sound propagation range and effect. This helps to ensure that every student in the classroom can hear the teaching content clearly and reduce the impact of sound propagation problems on teaching quality.

[0078] In one implementation, referring to FIG. 5 , the first network unit 206 includes an external network interface 212 ; the external network interface 212 is connected to the streaming unit 400 via a local area network;

[0079] The first digital signal processor 208 is used to transmit the recorded audio signal to the first chip 207 ; the first chip 207 is also used to output the recorded video signal and the recorded audio signal to the streaming unit 400 through the external network interface 212 .

[0080] The first network unit 206 is also provided with an external network interface 212, which can be a LAN port supporting a gigabit network, through which the external network live streaming function can be realized. The streaming unit 400 can be integrated into the recording terminal 200, or can be a central control device or other device with live streaming function set at a remote end.

[0081] In one implementation, referring to FIG5 , the second processor 301 includes a second chip 305 and a second digital signal processor 306 connected to each other;

[0082] The second chip 305 is connected to the second camera unit 302 and the second network unit 304;

[0083] The second digital signal processor 306 is connected to the second sound pickup unit 303 and the second network unit 304;

[0084] Among them, the second chip 305 is used to transmit the video signal collected by the second camera unit 302 to the first processor 201 through the second network unit 304 and the first network unit 206; the second digital signal processor 306 is used to transmit the audio signal collected by the second sound pickup unit 303 to the first processor 201 through the second network unit 304 and the first network unit 206.

[0085] In this embodiment, the second processor 301 may be a SOC (System on a Chip) chip, which has audio processing capability and video processing capability. In one implementation, referring to FIG. 5 , the second processor 301 includes a second chip 305 (SOC chip) and a second digital signal processor 306 (DSP, Digital Signal Processing), wherein the second chip 305 is connected to the second camera unit 302, the second digital signal processor 306 is connected to the second sound pickup unit 303, and the second network unit 304 is connected to the second chip 305 and the second digital signal processor 306, respectively.

[0086] By setting the second chip 305 to process the video signal and setting the second digital signal processor 306 to process the audio signal, parallel processing of audio and video can be achieved. The second chip 305 and the second digital signal processor 306 run in parallel, which improves the audio and video collection efficiency on the second user side.

[0087] In one implementation, referring to FIG5 , the audio and video terminal 300 further includes a second video output circuit 307 connected to the second chip 305 ;

[0088] The second chip 305 is also used to output the video signal collected by the second camera unit 302 through the second video output circuit 307 .

[0089] In one implementation, the audio and video terminal 300 also includes a second video output circuit 307 connected to the second chip 305. The second video output circuit 307 can be a USB output interface (USB2.0) for implementing the UXC function. The UXC function refers to the integrated function of UVC (USB AUDIO class) and UAC (USB video class). The audio and video terminal 300 of this embodiment can be used as a USB camera, USB microphone, USB speaker and other devices to provide classroom audio and video recording functions for third-party devices.

[0090] In one implementation, at least one of the first camera unit 202 and the second camera unit 302 includes a panoramic camera and a close-up camera.

[0091] The panoramic camera included in the first camera unit 202 is used to capture a panoramic image of the first user side, and the close-up camera included in the first camera unit 202 is used to capture a close-up image of the first user side. The close-up camera included in the first camera unit 202 can be intelligently switched under the control of the intelligent tracking function of the first processor 201. The panoramic camera included in the second camera unit 302 is used to capture a panoramic image of the second user side, and the close-up camera included in the second camera unit 302 is used to capture a close-up image of the second user side. The close-up camera included in the second camera unit 302 can be intelligently switched under the control of the intelligent tracking function of the second processor 301.

[0092] In one implementation, referring to FIG. 6 , FIG. 6 is a schematic diagram of a recording terminal in an example. The recording terminal 200 also includes: a storage unit connected to the first processor 201, the storage unit being used to store the encoded and recorded audio and video data. The storage unit may be an eMMC (Embedded Multi Media Card) memory, and the storage size of the eMMC shown in FIG. 6 may be 8GB. In one implementation, referring to FIG. 6 , the first processor 201 includes a first chip 207 and a first digital signal processor 208 that are communicatively connected to each other, and the first chip 207 and the first digital signal processor 208 are both connected to a storage unit. Furthermore, the first chip 207 is also provided with a DDR4 memory unit, and the size of the DDR4 memory unit shown in FIG. 6 may be 1GB.

[0093] In one implementation, referring to FIG. 6 , the recording terminal 200 further includes: a power on / off indicator light connected to the first chip 207 , the power on / off indicator light displays different colors in the power on state and the power off state, for example, a red light in the power off state and a blue light in the power on state.

[0094] In one implementation, referring to FIG. 6 , the recording terminal 200 further includes: a system reset button connected to the first chip 207 , and the system reset button is used to restore the system default settings.

[0095] In one implementation, referring to FIG6 , the recording terminal 200 further includes: at least one USB interface connected to the first chip 207. The first chip 207 shown in FIG6 includes one USB 3.0 interface and two USB 2.0 interfaces. More or less USB interfaces and types can be set according to actual application requirements, and this embodiment does not limit this. By setting the USB interface, audio and video file copying and direct recording functions can be realized.

[0096] In one implementation, referring to FIG. 6 , the recording terminal 200 further includes a control interface connected to the first chip 207 ; the control interface is connected to the central control device; wherein the first chip 207 is also used to receive a control signal from the central control device through the control interface.

[0097] The central control device may be a computer, a mobile phone, an intelligent teaching platform, a cloud server, etc., which is not limited in this embodiment. Referring to FIG. 6 , the control interface may be an interface supporting RS422 serial communication. The control signal of the central control device may be used to control the functions of the recording terminal 200 such as power on / off, reset, recording, pausing recording, ending recording, file copying, and video playback.

[0098] In one implementation, referring to Figure 6, the recording terminal 200 also includes: a power supply unit, which supplies power to the recording terminal 200; a micro control unit, wherein the first signal input terminal of the micro control unit is connected to the control interface, the second signal input terminal of the micro control unit is connected to the first chip 207, and the signal output terminal of the micro control unit is connected to the power supply unit; wherein the micro control unit is used to receive a switch control signal from the central control device through the first signal input terminal, or to receive a switch control signal from the first chip 207 through the second signal input terminal, and respond to the switch control signal and transmit the power control signal to the power supply unit through the signal output terminal.

[0099] 6 , the power supply unit includes a DC regulated power supply (DC power supply) and a DC-DC converter. In one implementation, the power supply unit supplies power to the first chip 207, the first network unit 206, and the first digital signal processor 208 in the recording terminal 200. The voltage of the DC power supply may be 12V.

[0100] The microcontroller unit (MCU) receives a switch control signal from the first chip 207 or the central control device through an asynchronous communication bus (UART), generates a corresponding power control signal (CTRL) according to the switch control signal, and transmits it to the power supply unit to control the power supply unit to supply power or cut off power, thereby turning on or off the recording terminal 200. In one implementation, the recording terminal 200 further includes: a power button connected to the first chip 207, and the first chip 207 sends a switch control signal to the microcontroller unit according to the state of the power button.

[0101] In one implementation, referring to FIG. 6 , the intranet interface and the external network interface 212 are RJ45 network ports with lights, and the recording terminal 200 further includes: a PSE power chip for supplying power to the intranet interface through a network transformer, and the voltage may be 56V.

[0102] In one implementation, referring to FIG. 6 , the first network unit 206 includes a network transformer, a gigabit switch chip, a gigabit PHY chip, a 100M PHY chip, an intranet interface and an external network interface 212. The intranet interface (POE) uses an MDI interface and is connected to the gigabit switch chip through the network transformer. The gigabit switch chip is connected to the first chip 207 through the RGMII interface. The gigabit switch chip is connected to the 100M PHY chip through the MDI interface. The 100M PHY chip is connected to the first digital signal processor 208 through the RMII interface, so that the video signal collected by the audio and video device set on the second user side is transmitted to the first chip 207 through the network transformer, the gigabit switch chip, and the first chip 207 for processing, and the audio signal collected by the audio and video device set on the second user side is transmitted to the first digital signal processor 208 through the network transformer, the gigabit switch chip, and the 100M PHY chip for processing. The external network interface 212 is connected to the first chip 207 through the gigabit PHY chip and the RGMII interface.

[0103] The communication protocols, communication interfaces or data types transmitted between the modules, units or circuits in the recording terminal 200 of this embodiment can refer to the example of FIG. 6 , for example, the HDMI input interface transmits the TMDS signal to the video switching circuit, and the video switching circuit communicates with the first chip 207 via MIPI / I2C. For another example, the panoramic camera and the close-up camera communicate with the first chip 207 via MIPI-CSI / I2C. The recording terminal 200 can also use other communication methods to realize data transmission, which is not limited in this embodiment.

[0104] In one implementation, referring to Figure 7, which is a schematic diagram of an audio and video terminal in an example, the audio and video terminal 300 also includes an audio input circuit 205 connected to the second digital signal processor 306, and the audio input circuit 205 includes an audio processing subsystem (refer to the AUDIO ADC chip in Figure 7) and an audio input interface, and the audio input interface can be a linear input interface (refer to LINE IN in Figure 7).

[0105] In one implementation, referring to FIG. 7 , the audio and video terminal 300 further includes: a power indicator light connected to the second chip 305 , the power indicator light displays different colors in the power-on state and the power-off state, for example, a red light in the power-off state and a blue light in the power-on state.

[0106] In one implementation, referring to FIG. 7 , the audio and video terminal 300 further includes: a system reset button connected to the second chip 305 , and the system reset button is used to restore the system default settings.

[0107] In one implementation, referring to FIG. 7 , the audio and video terminal 300 further includes a power supply unit for supplying power to the audio and video terminal 300 .

[0108] The communication protocol, communication interface or data type transmitted between the modules, units or circuits in the audio and video terminal 300 of this embodiment can refer to the example in Figure 7, and other communication methods can also be used to implement data transmission, which is not limited in this embodiment.

[0109] Referring to FIG. 8 , FIG. 8 is a schematic diagram of the structure of a recording terminal in an embodiment. The recording terminal 200 provided in an embodiment of the present application is arranged at the first user side, and includes:

[0110] A first processor 201; a first camera unit 202, a video input circuit 203, a first sound pickup unit 204, an audio input circuit 205, and a first network unit 206 connected to the first processor 201; the first network unit 206 is connected to an audio and video terminal 300 disposed at a second user side via a network cable;

[0111] The first network unit 206 is used to transmit the audio signal and the video signal of the second user side collected by the audio and video terminal 300 to the first processor 201;

[0112] The first processor 201 is used to receive and record the video signal collected by the first camera unit 202, the video signal transmitted by the video input circuit 203, and the video signal collected by the audio and video terminal 300; the first processor 201 is also used to receive and record the audio signal collected by the first pickup unit 204, the audio signal transmitted by the audio input circuit 205, and the audio signal collected by the audio and video terminal 300.

[0113] The implementation solution provided by the recording terminal to solve the problem is similar to the implementation solution recorded in the above-mentioned classroom recording system. Therefore, the specific limitations in the recording terminal embodiment provided in this application can be found in the above limitations on the recording terminal in the classroom recording system, and will not be repeated here.

[0114] Referring to FIG. 9 , FIG. 9 is a schematic diagram of the structure of an audio and video terminal in an embodiment. The audio and video terminal 300 provided in an embodiment of the present application is arranged at the second user side, and includes:

[0115] A second processor 301; a second camera unit 302, a second sound pickup unit 303 and a second network unit 304 connected to the second processor 301; the second network unit 304 is connected to the recording terminal 200 provided at the first user side via a network cable;

[0116] The second processor 301 is used to transmit the video signal collected by the second camera unit 302 and the audio signal collected by the second sound pickup unit 303 to the recording terminal 200 through the second network unit 304 for recording.

[0117] The implementation solution provided by the audio and video terminal to solve the problem is similar to the implementation solution recorded in the above-mentioned classroom recording system. Therefore, the specific limitations in the audio and video terminal embodiment provided in this application can be found in the above limitations on the audio and video terminal in the classroom recording system, which will not be repeated here.

[0118] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0119] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A classroom recording system, characterized in that: The classroom recording system includes a recording terminal arranged at a first user side and an audio and video terminal arranged at a second user side; The recording terminal includes: a first processor; a first camera unit, a video input circuit, a first sound pickup unit, an audio input circuit and a first network unit connected to the first processor; The audio and video terminal comprises: a second processor; a second camera unit, a second sound pickup unit and a second network unit connected to the second processor; the second network unit is connected to the first network unit via a network cable; The second processor is used to transmit the video signal collected by the second camera unit and the audio signal collected by the second sound pickup unit to the first processor through the second network unit and the first network unit; The first processor is used to receive and record the video signal collected by the first camera unit, the video signal transmitted by the video input circuit, and the video signal collected by the second camera unit; the first processor is also used to receive and record the audio signal collected by the first sound pickup unit, the audio signal transmitted by the audio input circuit, and the audio signal collected by the second sound pickup unit.

2. The classroom recording system according to claim 1, characterized in that: The first processor includes a first chip and a first digital signal processor connected to each other; The first chip is connected to the first camera unit, the video input circuit and the first network unit; The first digital signal processor is connected to the first sound pickup unit, the audio input circuit and the first network unit; Among them, the first chip is used to receive and record the video signal collected by the first camera unit, the video signal transmitted by the video input circuit, and the video signal collected by the second camera unit; the first digital signal processor is used to receive and record the audio signal collected by the first sound pickup unit, the audio signal transmitted by the audio input circuit, and the audio signal collected by the second sound pickup unit.

3. The classroom recording system according to claim 2, characterized in that: The recording terminal also includes a first video output circuit connected to the first chip; The first chip is also used to output the recorded video signal through the first video output circuit.

4. The classroom recording system according to claim 2, characterized in that: The recording terminal further includes an audio output circuit connected to the first digital signal processor; the audio output circuit is connected to a built-in or external sound amplification unit; Wherein, the first digital signal processor is also used to transmit the recorded audio signal to the sound amplification unit through the audio output circuit.

5. The classroom recording system according to claim 2, characterized in that: The first network unit includes an external network interface; the external network interface is connected to the streaming unit via a local area network; Among them, the first digital signal processor is used to transmit the recorded audio signal to the first chip; the first chip is also used to output the recorded video signal and the recorded audio signal to the streaming unit through the external network interface.

6. The classroom recording system according to claim 1, characterized in that: The second processor includes a second chip and a second digital signal processor connected to each other; The second chip is connected to the second camera unit and the second network unit; The second digital signal processor is connected to the second sound pickup unit and the second network unit; Among them, the second chip is used to transmit the video signal collected by the second camera unit to the first processor through the second network unit and the first network unit; the second digital signal processor is used to transmit the audio signal collected by the second sound pickup unit to the first processor through the second network unit and the first network unit.

7. The classroom recording system according to claim 6, characterized in that: The audio and video terminal also includes a second video output circuit connected to the second chip; The second chip is further used to output the video signal collected by the second camera unit through the second video output circuit.

8. The classroom recording system according to any one of claims 1 to 7, characterized in that: At least one of the first camera unit and the second camera unit includes a panoramic camera and a close-up camera.

9. A recording terminal, characterized in that: The recording terminal is arranged at the first user side, and the recording terminal comprises: A first processor; a first camera unit, a video input circuit, a first sound pickup unit, an audio input circuit and a first network unit connected to the first processor; the first network unit is connected to an audio and video terminal arranged on a second user side via a network cable; wherein the audio and video terminal comprises: a second processor; a second camera unit, a second sound pickup unit and a second network unit connected to the second processor; the second network unit is connected to the first network unit via a network cable; the second processor is used to transmit the video signal collected by the second camera unit and the audio signal collected by the second sound pickup unit to the recording terminal via the second network unit; Wherein, the first network unit is used to transmit the audio signal and the video signal of the second user side collected by the audio and video terminal to the first processor; The first processor is used to receive and record the video signal collected by the first camera unit, the video signal transmitted by the video input circuit, and the video signal collected by the audio and video terminal; the first processor is also used to receive and record the audio signal collected by the first sound pickup unit, the audio signal transmitted by the audio input circuit, and the audio signal collected by the audio and video terminal.

10. An audio and video terminal, characterized in that: The audio and video terminal is arranged at the second user side, and the audio and video terminal comprises: a second processor; a second camera unit, a second sound pickup unit and a second network unit connected to the second processor; the second network unit is connected to a recording terminal arranged at the first user side via a network cable; wherein the recording terminal comprises: a first processor; a first camera unit, a video input circuit, a first sound pickup unit, an audio input circuit and a first network unit connected to the first processor; the second network unit is connected to the first network unit via a network cable; Among them, the second processor is used to transmit the video signal collected by the second camera unit and the audio signal collected by the second sound pickup unit to the recording terminal for recording through the second network unit; wherein the first processor is used to receive and record the video signal collected by the first camera unit, the video signal transmitted by the video input circuit, and the video signal collected by the audio and video terminal; the first processor is also used to receive and record the audio signal collected by the first sound pickup unit, the audio signal transmitted by the audio input circuit, and the audio signal collected by the audio and video terminal.

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