CN201928387U - Integrated course recording device - Google Patents

Abstract

An integrated course recording device relates to a recording device. Provide low energy consumption, low cost integrated course recording device. There are camera components, VGA wireless receiving components, video selection components, wireless microphone receiving components, video and audio distribution components, monitoring components, hard disk recording components and machine control components; the signal output terminal of the camera component and the output terminal of the VGA wireless receiving component are connected to the video The input terminal of the selection component, the output terminal of the VGA wireless receiving component is connected to the input terminal of the video and audio distribution component, the output terminal of the video and audio distribution component is connected to the input terminal of the video selection component through the interface; the output terminal of the wireless microphone receiving component is connected to the input terminal of the video and audio distribution component, and the video The output terminals of the audio distribution component are respectively connected to the monitoring component, the hard disk recording component and the USB output interface, the output terminals of the hard disk recording component are respectively connected to the monitoring component and the USB output interface, and the control signal output terminals of the whole machine control component are connected to the camera component, the video selection component, and the monitoring component and hard disk recording components.

Description

All-in-one course recording device

technical field

The utility model relates to a recording device, in particular to an integrated course recording device.

Background technique

The course recording device is an essential device for education and teaching institutions to share high-quality teaching resources and improve teaching effects. The use of course recording devices has gradually become popular from universities to primary and secondary schools. The largest amount of work for schools to record courses is resource sharing, and the work of timely distance education is very limited.

Existing course recording equipment mainly has two modes: regular recording mode and recording and broadcasting mode.

1) The existing conventional recording mode is introduced by the TV shooting method, which consists of multiple devices. Due to the inconvenience of movement and complicated matching, it is impossible to carry a large number of devices when shooting in any classroom. Therefore, the conventional recording mode is often simplified to a camera to the scene, and then post-editing. When working in normal mode, one camera takes pictures of the teacher, and the other takes pictures of the projection screen, and then the two video signals are sent to the video switcher, and the director selects one to send to the video input of the video recorder. The teacher's voice is also sent to the audio input end of the video recorder by the microphone through the mixer, and the audio and video signals are recorded by the video recorder. The synchronous machine is an indispensable device to enable many devices such as cameras and video switchers to work synchronously (Wang Indium, Educational TV System [M], Beijing Normal University Network Education Teaching Book 2004), and its main disadvantage is the use of multiple Equipment, the projection screen screen is taken by a camera, which has disadvantages such as dimness, blur, color distortion, high cost, high energy consumption of more than a dozen devices, and difficulty in moving.

2) The existing recording and broadcasting mode is a product specially produced by the manufacturer for remote live broadcasting, that is, the recording and broadcasting system. It installs the video capture card, VGA capture card, and sound card in the main computer (server). The teacher's voice is also sent to the wireless receiving device through the wireless microphone, and then it sends the audio signal to the sound card of the computer. Collect, switch, record, and broadcast live. This mode requires a desktop computer with relatively high performance (some manufacturers use industrial chassis to install various boards). When working, the camera shoots the teacher’s video signal to the video capture card, and the projection screen’s picture is sent from the VGA to the VGA capture card through the VGA cable. The teacher’s voice is transmitted to the wireless microphone receiver through wireless, and the audio signal is sent to the sound card. , The three-way signal is controlled by the director through special software, and the teaching information is broadcast directly through the network and recorded in the hard disk at the same time. However, the main application of this kind of device is live broadcast, so high-performance desktop computers must be used. In this way, when used for course resource construction, high-performance desktop computers will not only waste money, but also consume long-term work while a large number of functions are idle. A large amount of energy is consumed, and the wiring of the VGA line needs to be transformed in the classroom, so this method cannot be moved. Using a high-performance desktop computer is expensive (the market price is not less than 100,000 yuan). A desktop computer with a monitor consumes at least 240W.

The applicant discloses a course recording device in Chinese patent CN201608790U, which is provided with a VGEA acquisition and transmission circuit, a voice wireless transmission unit, a course recording controller and a computer. The VGA signal and audio signal input ends of the VGEA acquisition and emission circuit are respectively externally connected to the VGA signal output end of the computer graphics card of the podium and the audio signal output end of the sound card. The course recording controller is equipped with 2.4G receiving AV demodulation circuit, video input circuit, video blanking switching circuit, digital-to-analog conversion circuit, voice receiving demodulation part, VA/USB conversion part for converting AV into USB data stream, Audio monitoring components and power supply. Due to the use of the wireless signal transmission system, the cost of digging grooves and wiring in the classroom is saved. Use the acquisition software that comes with the operating system to save the development cost of special software. Replace the various boards installed in the desktop computer with the recording controller, and get rid of the desktop computer with energy consumption several times that of the portable computer.

Contents of the invention

The purpose of the utility model is to provide an integrated course recording device with low energy consumption and low cost in view of the disadvantages of the existing course recording device such as high energy consumption and high cost.

The utility model is provided with:

The wireless microphone that needs to be hung on the teacher and the VGA to AV transmitter that needs to be installed near the PC on the podium;

Camera component, VGA wireless receiving component, video selection component, wireless microphone receiving component, video and audio distribution component, monitoring component, hard disk recording component, machine control component and power supply component; said camera component, VGA wireless receiving component, video selection component , wireless microphone receiving component, video and audio distribution component, monitoring component, hard disk recording component, machine control component and power supply component are all integrated in one chassis, and the signal output terminal of the camera component and the output terminal of the VGA wireless receiving component are connected to the video selection component The input terminal, the output terminal of the VGA wireless receiving component is connected to the input terminal of the video and audio distribution component, and the output terminal of the video and audio distribution component is connected to the input terminal of the video selection component through the interface; the output terminal of the wireless microphone receiving component is connected to the input terminal of the video and audio distribution component, and the video The output terminals of the audio distribution component are respectively connected to the monitoring component, the hard disk recording component and the USB output interface; , monitoring component and hard disk recording component.

Compared with the existing course recording device, the utility model has the following outstanding advantages:

1) Work tasks are pertinent and adaptable. Due to the integrated design, the structure is simple and compact, easy to use and low in investment.

2) The recorded teaching video data can be copied from the U disk, which is very suitable for the construction and sharing of most teaching resources.

3) save energy consumption, the total energy consumption is about 36W, Table 1 is the energy consumption comparison between the existing course recording device and the utility model.

Table 1

Source: 1) http://www.soso.com/q? w=%CB%C9%CF%C2WJ-MX12%20%

C4%DC%BA%C4&sc=web&pid=c.his&ch=w.his;

2) http://zhidao.baidu.com/question/2085113.html? fr=qrl.

Description of drawings

Fig. 1 is a structural block diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the composition of the main circuit of the embodiment of the utility model.

Fig. 3 is a schematic diagram of the composition of the control circuit of the embodiment of the utility model.

Detailed ways

The following embodiments will further illustrate the utility model in conjunction with the accompanying drawings.

Referring to Fig. 1, the utility model embodiment is provided with the wireless microphone that needs to be hung on the teacher's body and needs to be contained in outside the VGA turn AV transmitter near the platform PC, also be provided with camera assembly (Camera) C, VGA wireless receiving assembly (VGA Wireless) VGAW, Video Selector VS, Wireless Microphones Receive WMR, Video/AUDIO Distribution V/AD, Monitor M, Hard Disk Recording Recorder) HD, machine control component (Machine Control) MC and power supply component (Powerl) P; said camera component (Camera) C, VGA wireless receiving component (VGA Wireless) VGAW, video selection component (Video Selector) VS, wireless Wireless Microphones Receive WMR, Video/AUDIO Distribution V/AD, Monitor M, Hard Disk Recorder HD, Machine Control MC and power supply Components (Power 1)P are all integrated in one chassis, camera component C, VGA wireless receiving component VGAW, video selection component VS, wireless microphone receiving component WMR, video and audio distribution component V/AD, monitoring component M, hard disk recording component HD , the complete machine control component MC and the power supply component P; the signal output terminal of the camera component C and the output terminal of the VGA wireless receiving component VGAW are connected to the input terminal of the video selection component VS, and the output terminal of the VGA wireless receiving component VGAW is connected to the video and audio distribution component V/ The input terminal of AD, the output terminal of V/AD of the video and audio distribution component are connected to the input terminal of the video selection component VS through the interface VAI/O; the output terminal of the wireless microphone receiving component WMR is connected to the V/AD input terminal of the video and audio distribution component, and the video and audio distribution component The V/AD output terminals are respectively connected to the monitoring component M, the hard disk recording component HD and the USB output interface USB Out1, the output terminals of the hard disk recording component HD are respectively connected to the monitoring component M and the USB output interface USB Out2, and the control signal output of the whole machine control component MC The terminals are respectively connected with camera component C, video selection component VS, monitoring component M and hard disk recording component HD.

The camera component C undertakes the task of taking pictures of the teacher, and the video signal it outputs is sent to the video selection component VS, and its zoom and focus control signals are sent to the machine control component MC.

The VGA wireless receiving component VGAW converts VGA into video and audio (AV) and modulates and transmits it. After wireless signal reception and demodulation, the video signal is sent to the video selection component VS; the audio signal on the PC is sent to the video and audio distribution component.

The video selection component VS selects multiple video signals from the camera component, VGA wireless receiving component, and input and output interface components, and sends a desired video signal to the video and audio amplification and distribution component VAD through the selection of the director. Its selection controlled signal is sent to the complete machine control module MC.

After the wireless microphone receiving component WMR receives the teacher's voice signal, it sends it to the video and audio amplification and distribution component VAD.

The video and audio distribution component V/AD amplifies one channel of video and two channels of audio signals sent by VS, VGAW and WM, and sends them to the monitoring component M in four channels at the same time, the hard disk recording component HD, video and audio output, and video and audio conversion. The USB data stream component outputs video and audio data streams from the USB out for live broadcasting.

The monitoring component M uses a 6-inch LCD screen to monitor the video and audio signals sent by the video and audio distributor or hard disk recorder.

The hard disk recording component HD converts the video and audio from the video and audio distribution component into RM, MPEG1, MPEG2, and other formats and records them on the hard disk. Set the HD to play state, output the play data through the USB component, and also send out analog video and audio for monitoring.

The whole machine control component MC coordinates the above-mentioned various components. It controls the zooming and gathering of the camera component, controls the channel selection of the video selection component, controls the playback and pause of the hard disk recorder, and can convert HD through its own conversion function. The data is output by USB.

The power supply component P converts the mains power into the DC 12V, 5V, and 3V required by the device and provides them to related components.

Fig. 2 and 3 provide the schematic diagram of circuit composition of the present utility model, and its simple operating principle is as follows:

When the utility model works, it can be photographed by the camera assembly C on the machine; it can also be connected with an external video camera to send video signals through Vin4. The two video signals are selected by the selection switch SW1 to form the main video Main Video and sent to the input terminal 1 of the video selection component VS. When multi-channel video is required to participate in the selection, the utility model provides two secondary video inputs, and the Vin3 and Vin2 interfaces send Vice Video1 and Vice Video2 to the 2 and 3 input ends of the video selection component VS. The selected video Selected Video is sent to input 1 of the video and audio amplification and distribution component VAD. At the same time, the teacher's voice passes through the wireless microphone receiving component WMR, and sends the audio signal Local Audio to the 3 input terminal of the VAD. The sound of the podium PC is received by the VGAW component and sent to the audio selection switch SW2, together with the external audio Vice Audio, a secondary audio signal ViceAudio is selected and sent to the 2 input terminal of the VAD. The three output groups of the video and audio amplification and distribution component VAD are respectively sent to the video and audio output interfaces Video out, Audio R out, and Audio L out. Terminals 7, 8, and 10 of the VAD send video and audio to the AV/USB component, convert the analog signal into a data signal and output it from the AV-D out port for live broadcasting, etc. Terminals 11, 12, and 13 of VAD send video and audio to terminals 2, 5, and 8 of the triple double-throw switch SW3. Terminals 14, 15, and 16 of VAD send video and audio to input terminals 1, 2, and 3 of the hard disk recording component HD. Output ports 5, 6, and 7 of the hard disk recording component HD can send video signals played by HD to ports 3, 6, and 9 of SW3. Through the selection of SW3, the monitoring component M can monitor the video and audio signals to be recorded and played after recording.

Transistor Q1, resistors R1, R2, R3, and red light-emitting diodes D1, D2 form a recording indicator light. When the device enters the recording state, diodes D1 and D2 light up, and at the same time send a light signal to the control component through pin 11 of CON3 to light up D6 on the control assembly. The green light-emitting diode D3 and the resistor R4 form a power indicator light. Electrolytic capacitors C1, C2, and C3 are filter capacitors for 12V, 5V, and 3V, respectively. The AC power socket CZ and the power switch SW4 are used to introduce and open and close the total power of the device.

The energy consumption of each part of the utility model is as follows:

7" display: 12V, 700mA, 8.4W;

Hard disk recorder: 12V, 800mA, 9.6W;

Camera: 12V, 300mA, 3.6W;

Video and audio distributor: 1W power transformer;

Video selector: 12V, 1000mA, 12W, power transformer;

VGA receiving: 5V, 300mA, 1.5W, originally powered by the USB port of the PC;

Wireless microphone receiver: 3V, 15OmA, 0.45W;

Total power consumption: 36.55W.

The principle of the control channel is as follows:

The main various controls of each component of the utility model are completed by the complete machine control component MC. The control is completed by connecting the connectors with each component. Camera component control connector CON1, video selection control connector CON2, hard disk recording control connector CON3, their pins and corresponding components corresponding relationship and functions are listed in Table 2-4.

Table 2 Camera component pin functions

CON1 pin C component pin Button number and function 1 3 S14TELE telephoto adjustment 2 4 S15WIDE wide-angle adjustment 3 5 S16FAR telephoto focus

4 6 S17NEAR wide-angle focus 5 7 S18MENU menu setting

Table 3 Video Select Component Pin Functions

CON2 pin VS component pin Button number and function 1 6 Press S1 to switch to Mainvideo 2 7 When the main video is selected, the D1Main video lamp light is on 3 8 Press S2 to switch to VGAvideo 4 10 D2VGAvideo lamp is on when VGA video is selected 5 11 Press S3 to switch to Vice video 1 6 12 D3Vice video 1 lamp lights up when sub-video 1 is selected 7 13 Press S4 to switch to Vice video 2 8 14 D4Vice video 2 lamp lights up when sub-video 2 is selected 9 15 Press S5 to switch to Fourvideo 10 16 Four screens are split and output at the same time D5Four video lamp is on

Table 4 Pin function of hard disk recording component

In order to enable the video selection to be in the state of selecting the main video Main Video when starting up, and to switch between the most commonly used Main Vide and VGAVideo with one key, a one-key control circuit is set. The circuit consists of U1B, U2A, U2B, U2C and peripheral parts. U2A, R1 and C1, U2B, R13 and C3, U2C, R4 and C4 form three groups of monostable circuits respectively, and U1B is a bistable circuit. When starting up, due to the high level of R of U1B, the Q of terminal 13 is at a low level, the non-terminal of Q14 is at a high level, Q1 is cut off, and Q2 is turned on instantly, which makes U3 turn on instantly, which is equivalent to pressing S1. Main Video is selected. When the one-button switching button S6 is pressed, a pulse is output from terminal 2 of U2A, and is added to the CLK terminal of U1B, so that the bistable state flips Q to high level and Q non-terminal to low level, Q2 is cut off, and Q1 It is turned on instantly, U4 is turned on and U3 is turned off, and VGA Video is selected. This completes the one-key switching between Main Vide and VGA Video. S3 and S4 are the selection buttons of the two-way sub-video, and S5 is the button for displaying the four-way video on the screen at the same time in a state of four divisions. D1, D2, D3, D4, D5 corresponding video selection indicators, when a channel video is selected, the corresponding light is on.

Since the recording and stopping of the HD component itself are performed by two groups of circuits, in order to be consistent with the daily use habits, a single-button record/stop circuit is designed, as long as S13 is pressed, the recording/stop control of the HD component can be performed. The circuit principle is the same as the one-key switching of two channels of video.

The utility model can also adopt a tripod, which can be mounted on the tripod like a portable video camera during use.

Claims (1)

1. The integrated course recording device is equipped with a wireless microphone and a VGA to AV transmitter, and is characterized in that it is also equipped with a camera component, a VGA wireless receiving component, a video selection component, a wireless microphone receiving component, a video and audio distribution component, a monitoring component, Hard disk recording component, complete machine control component and power supply component; said camera component, VGA wireless receiving component, video selection component, wireless microphone receiving component, video and audio distribution component, monitoring component, hard disk recording component, complete machine control component and power supply component Both are integrated in one chassis, the signal output terminal of the camera component and the output terminal of the VGA wireless receiving component are connected to the input terminal of the video selection component, the output terminal of the VGA wireless receiving component is connected to the input terminal of the video and audio distribution component, and the output of the video and audio distribution component The terminal is connected to the input terminal of the video selection component through the interface; the output terminal of the wireless microphone receiving component is connected to the input terminal of the video and audio distribution component, and the output terminal of the video and audio distribution component is respectively connected to the monitoring component, the hard disk recording component and the USB output interface, and the output terminals of the hard disk recording component are respectively The monitoring component and the USB output interface are connected, and the control signal output terminals of the complete machine control component are respectively connected to the camera component, the video selection component, the monitoring component and the hard disk recording component.

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