Wired and wireless fusion video conference system

Abstract

The utility model relates to a wired and wireless fusion video conference system, which comprises an audio signal acquisition module, a transmission cable, a host module, a video acquisition module and a display module, the audio signal acquisition module acquires on-site wired audio signals and wireless audio signals and transmits the wired audio signals and the wireless audio signals to the host module through a transmission cable. The video acquisition module sends a video signal to the host module; and the host module processes the wired audio signal and / or the wireless audio signal, outputs the processed audio signal, sends the video signal to the display module, and displays the video signal through the display module. According to the utility model, the functions of a wired system, a wireless system and a video matrix system are integrated, multiple purposes are realized, a better conference system solution is provided for a user, the construction and maintenance are more convenient, and the equipment cost, construction cost and maintenance cost of a user side are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of video conference systems, and more specifically, to a wired and wireless fusion video conference system. Background Art

[0002] At present, traditional conference systems on the market are divided into wired conference systems and wireless conference systems, and do not support video switching functions. Wired conference systems have better sound quality and stable transmission, but the installation and wiring are cumbersome and expensive. Wireless conference systems are easy to install, do not require wiring, and are flexible to use, but the transmission stability is easily disturbed. The video matrix is ​​used to switch and process multiple video signals. In the conference system, it can realize functions such as camera tracking, multi-conference room screen switching, and multi-party remote video. For different conference applications, users need to purchase and install wired conference systems, wireless conference systems, and video matrices separately to meet the needs of conference scenarios; at the same time, different types of conference systems need to be maintained separately, which greatly increases the equipment cost, construction cost, and maintenance cost. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a wired and wireless fusion video conferencing system.

[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a wired and wireless fusion video conferencing system, including: an audio signal acquisition module, a transmission cable, a host module, a video acquisition module and a display module connected to the host module;

[0005] The audio signal acquisition module is connected to the host module through the transmission cable, and is used to collect wired audio signals and wireless audio signals at the scene, and transmit the wired audio signals and the wireless audio signals to the host module through the transmission cable;

[0006] The video acquisition module is connected to the host module and is used to acquire video signals and send the video signals to the host module;

[0007] The host module is used to process the wired audio signal and / or the wireless audio signal and output the processed audio signal, and to process the video signal and send the video signal to the display module so that the video signal can be displayed through the display module.

[0008] In the wired and wireless converged video conferencing system described in the utility model, the audio signal acquisition module includes: multiple groups of wired units, multiple wireless units and antenna boxes; each group of the wired units includes: multiple independent wired units;

[0009] Each group of the wired units is connected to the host module via a transmission cable, and the antenna box is connected to the host module via a transmission cable;

[0010] Each group of the wired units transmits the collected wired audio signals to the host module via the transmission cables connected thereto;

[0011] The multiple wireless units communicate with the antenna box and send the collected wireless audio signals to the antenna box;

[0012] The antenna box transmits the received wireless audio signal to the host module via a transmission cable connected thereto.

[0013] In the wired and wireless converged video conferencing system described in the utility model, the transmission cable is a six-core dedicated cable;

[0014] The six-core dedicated cable transmits control signals, information data and audio signals simultaneously.

[0015] The wired and wireless converged video conferencing system of the utility model further includes: an audio processor connected to the host module, an audio power amplifier connected to the audio processor, and a playback device connected to the audio power amplifier;

[0016] The audio processor is used to perform tuning processing on the processed audio signal output by the host module;

[0017] The audio power amplifier performs power amplification processing on the audio signal tuned by the audio processor and transmits the amplified audio signal to the playback device, so that the audio signal is played by the playback device.

[0018] The wired and wireless converged video conferencing system of the utility model further includes: a host computer connected to the host module;

[0019] The host computer receives the audio / video signals uploaded by the host module and outputs and displays the audio / video signals, and sends the operation information input by the user to the host module.

[0020] The wired and wireless converged video conferencing system of the utility model further includes: a central control device connected to the host module;

[0021] The central control device receives the audio / video signal uploaded by the host module, and sends the operation information input by the user to the host module.

[0022] In the wired and wireless converged video conferencing system described in the utility model, the host module includes: a video signal control unit connected to the video acquisition module, an audio signal processing unit connected to the audio signal acquisition module, and a conference management control signal processing unit connected to the video signal control unit and the audio signal processing unit respectively;

[0023] The video signal control unit is used to process the video signal output by the video acquisition module and send the processed video signal to the display module;

[0024] The audio signal processing unit is used to process the wired audio signal and / or the wireless audio signal, and send the processed wired audio signal and / or the wireless audio signal to the audio processor;

[0025] The conference management control signal processing unit is used to manage and control the management signals of the entire wired and wireless integrated video conferencing system.

[0026] In the wired and wireless converged video conferencing system described in the utility model, the video signal control unit includes: a video processor, four HDMI video input interfaces, four HDMI video output interfaces, a matrix MCU, multiple LED indicator lights, an RS232 conversion chip, an RS232 interface, an independent audio signal input interface, an independent audio signal output interface, an analog-to-digital conversion module, a digital-to-analog conversion module, and a digital switch;

[0027] The input ends of the four-way HDMI video input interface are connected to the video acquisition module, and the output ends of the four-way HDMI video input interface are connected to the video processor; the input ends of the four-way HDMI video output interface are connected to the video processor, and the output ends of the four-way HDMI video output interface are connected to the display module; the matrix MCU is connected to the video processor through I2C, and the matrix MCU is also connected to the audio signal processing unit through UART communication; the matrix MCU is connected to the multiple LED indicator lights through its GPIO port, the matrix MCU is connected to the RS232 interface through the RS232 conversion chip, the RS232 interface is connected to the conference management control signal processing unit, the independent audio signal input interface is connected to the digital switch through the analog-to-digital conversion module, the digital switch communicates with the video processor through I2S, and the digital switch is connected to the independent audio signal output interface through the digital-to-analog conversion module.

[0028] In the wired and wireless converged video conferencing system described in the utility model, the audio signal processing unit includes: a digital microphone interface, an analog microphone interface, a first operational amplifier chip, a second operational amplifier chip, a third operational amplifier chip, a fourth operational amplifier chip, a tuning and volume regulator, a fifth operational amplifier chip, a first relay, an audio partition output port, a second relay, a third relay and an audio mixing output port;

[0029] The conference management control signal processing unit includes: an RS232 interface, an RS232 conversion chip, an RS485 interface, a first RS485 conversion chip, an LED status light, a TFT display, a DSP potential selection port, a network port chip, a fourth relay, a second RS485 conversion chip, an AND gate, and a host MCU;

[0030] The digital microphone interface is connected to the antenna box and the wired digital unit through a six-core dedicated cable, respectively, and the analog microphone interface is connected to the wired analog unit; the input end of the first operational amplifier chip is connected to the digital microphone interface, the first output end of the first operational amplifier chip is connected to the input end of the second operational amplifier chip, the second output end of the first operational amplifier chip is connected to the fourth operational amplifier chip, and the output end of the second operational amplifier chip is connected to the audio partition output port through the first relay; the input end of the third operational amplifier chip is connected to the analog microphone interface, the output end of the third operational amplifier chip is connected to the fourth operational amplifier chip, the fourth operational amplifier chip is connected to the tuning and volume adjuster, and the tuning and volume adjuster is connected to the audio mixing output port through the fifth operational amplifier chip and the third relay in sequence, and the tuning and volume adjuster is also connected to the host MCU through the second relay;

[0031] The RS232 interface is connected to the video signal control unit, the RS232 conversion chip is respectively connected to the RS232 interface and the host MCU, the host MCU is connected to the RS485 interface through the first RS485 conversion chip, the host MCU is respectively connected to the LED status light, the TFT display screen, the DSP potential selection port, the fourth relay, the AND gate and the second RS485 conversion chip, the second RS485 conversion chip is connected to the AND gate, and the second RS485 conversion chip is also connected to the digital microphone interface through the fourth relay.

[0032] In the wired and wireless converged video conferencing system described in the utility model, the host module also includes: a power supply unit connected to the video signal control unit, the audio signal processing unit and the conference management control signal processing unit; the power supply unit is used to process the AC input signal and provide a power supply signal to the video signal control unit, the audio signal processing unit and the conference management control signal processing unit;

[0033] The power supply unit includes: an AC power port, a switching power supply, a first DC-DC module, a first LDO module, a switch module, multiple second DC-DC modules, a push-pull inverter circuit, a transformer, a second LDO module, a third LDO module, a third DC-DC module, a fourth LDO module and a fifth LDO module;

[0034] The AC power port is used to connect to AC power, the input end of the switching power supply is connected to the AC power port, the output end of the switching power supply is respectively connected to the first DC-DC module and the push-pull inverter circuit, the output end of the first DC-DC module is respectively connected to the input end of the first LDO module and the switching module, and the first LDO module outputs a first power supply signal;

[0035] The output end of the switch module is respectively connected to the input end of the multiple second DC-DC modules, and the output end of each second DC-DC module outputs a different second power supply signal; the input end of the push-pull inverter circuit is connected to the output end of the switching power supply, the output end of the push-pull inverter circuit is connected to the input end of the transformer, the output end of the transformer is respectively connected to the input end of the second LDO module, the input end of the third LDO module and the input end of the third DC-DC module, and the output end of the third DC-DC module is respectively connected to the relay, the fourth LDO module and the fifth LDO module; the output end of the second LDO module outputs the third power supply signal, the output end of the third LDO module outputs the fourth power supply signal, the output end of the third DC-DC module outputs the fifth power supply signal, and the output end of the fourth LDO module and the output end of the fifth LDO module respectively output the sixth power supply signal.

[0036] The wired and wireless converged video conferencing system implemented in the utility model has the following beneficial effects: including: an audio signal acquisition module, a transmission cable, a host module, a video acquisition module and a display module; the audio signal acquisition module acquires the wired audio signal and the wireless audio signal at the scene, and transmits the wired audio signal and the wireless audio signal to the host module through the transmission cable; the video acquisition module sends the video signal to the host module; the host module processes the wired audio signal and / or the wireless audio signal and outputs the processed audio signal, and sends the video signal to the display module, and displays the video signal through the display module. The utility model integrates the functions of the three major systems of wired, wireless and video matrix into one, realizes one machine with multiple uses, provides users with a better conference system solution, is more convenient to construct and maintain, and greatly reduces the equipment cost, construction cost and maintenance cost of the user end. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0038] Figure 1 It is an application connection diagram of the wired and wireless converged video conferencing system provided by the utility model;

[0039] Figure 2 It is the principle function frame of the host module provided by the utility model;

[0040] Figure 3 It is a functional block diagram of the power supply unit in the host module provided by the utility model;

[0041] Figure 4 It is a system function block diagram of the host module provided by the utility model. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] refer to Figure 1 , Figure 1 This is an application connection diagram of the wired and wireless converged video conferencing system provided by the utility model.

[0044] Specifically, Figure 1 As shown, the wired and wireless converged video conferencing system includes: an audio signal acquisition module 00, a transmission cable 5, a host module 1, a video acquisition module 10 and a display module 11 connected to the host module 1.

[0045] The audio signal acquisition module 00 is connected to the host module 1 via the transmission cable 5, and is used to acquire wired audio signals and wireless audio signals at the scene, and transmit the wired audio signals and wireless audio signals to the host module 1 via the transmission cable 5. The video acquisition module 10 is connected to the host module 1, and is used to acquire video signals and send the video signals to the host module 1; the host module 1 is used to process the wired audio signals and / or wireless audio signals and output the processed audio signals, and send the video signals to the display module 11 after processing the video signals, so that the video signals can be displayed by the display module 11.

[0046] In some embodiments, the audio signal acquisition module 00 can be used to acquire wired audio signals and / or wireless audio signals at the scene, and the acquired wired audio signals and / or wireless audio signals can be transmitted to the host module 1 through the transmission cable 5. In addition, the present invention can also acquire video signals at the scene through the video acquisition module 10 and send them to the host module 1, thereby integrating the functions of the three major systems of wired conference system, wireless conference system and video matrix on the basis of the original chassis size remaining unchanged, and the host module 1 also has a conference management function.

[0047] Optionally, in the embodiment of the utility model, the transmission cable 5 used is a six-core dedicated cable. The six-core dedicated cable can transmit control signals, information data and audio signals at the same time.

[0048] Optionally, in the embodiment of the utility model, as Figure 1 As shown, the audio signal acquisition module 00 includes: multiple groups of wired units 4, multiple wireless units 3 and antenna box 2; each group of wired units 4 includes: multiple independent wired units 4. Among them, each group of wired units 4 is connected to the host module 1 through a transmission cable 5, and the antenna box 2 is connected to the host module 1 through a transmission cable 5; each group of wired units 4 transmits the collected wired audio signal to the host module 1 through the transmission cable 5 connected thereto; multiple wireless units 3 communicate with the antenna box 2 and send the collected wireless audio signal to the antenna box 2; the antenna box 2 transmits the received wireless audio signal to the host module 1 through the transmission cable 5 connected thereto.

[0049] Specifically, Figure 1 As shown, in this embodiment, each wireless unit 3 uses 2.4G to transmit control signals and digital U-segment to transmit voice signals. It should be noted that digital U-segment voice transmission mainly includes signal sampling, quantization, encoding, modulation, wireless transmission, demodulation, decoding, etc. Compared with traditional analog U-segment transmission, it has stronger anti-interference ability and higher data confidentiality security.

[0050] Furthermore, if Figure 1 As shown, the wired and wireless converged video conferencing system also includes: an audio processor 6 connected to the host module 1, an audio power amplifier 7 connected to the audio processor 6, and a playback device 8 connected to the audio power amplifier 7; the audio processor 6 is used to tune the processed audio signal output by the host module 1; the audio power amplifier 7 performs power amplification on the audio signal tuned by the audio processor 6 and then transmits it to the playback device 8, so that the audio signal can be played through the playback device 8.

[0051] like Figure 1 As shown, each wired unit 4 is used to pick up sound at the venue, and connects the collected audio signal (i.e., wired audio signal) to the host module 1 through a six-core dedicated cable. After receiving the audio signal transmitted by the wired unit 4 through the six-core dedicated cable, the host module 1 processes the audio signal and outputs it to the audio processor 6, which tunes the audio signal and then amplifies it through the audio power amplifier 7 and outputs it to the playback device 8 (such as a speaker).

[0052] like Figure 1 As shown, each wireless unit 3 is used to pick up sound at the venue and send the collected audio signal (i.e., wireless audio signal) to the antenna box 2. The antenna box 2 transmits the audio signal to the host module 1 through a six-core dedicated cable. After receiving the audio signal transmitted by the antenna box 2 through the six-core dedicated cable, the host module 1 processes the audio signal and outputs it to the audio processor 6. The audio processor 6 tunes the audio signal and then amplifies it through the audio power amplifier 7 and outputs it to the playback device 8.

[0053] Furthermore, if Figure 1 As shown, the wired and wireless converged video conferencing system also includes: a host computer 9 connected to the host module 1; the host computer 9 receives the audio / video signals uploaded by the host module 1 and outputs and displays the audio / video signals, and sends the operation information input by the user to the host module 1. The host computer 9 and the host module 1 are connected via Ethernet.

[0054] Furthermore, if Figure 1 As shown, the wired and wireless converged video conferencing system also includes: a central control device 12 connected to the host module 1; the central control device 12 receives the audio / video signal uploaded by the host module 1, and sends the operation information input by the user to the host module 1. The central control device 12 and the host module 1 are connected via RS232 communication.

[0055] By connecting the host module 1 with the host computer 9 and the central control device 12, access control of the host computer 9 and the central control device 12 is realized, thereby realizing more intelligent human-computer interaction.

[0056] Optionally, in this embodiment, the host module 1 supports HDMI four-input and four-output input and output switching. Among them, the video acquisition module 10 includes 4-channel video signals, which are input to the host module 1 for processing and then transmitted to the display module 11, and the display module 11 outputs the 4-channel video signals. Among them, the host module 1 can realize seamless switching of the 4-channel video signals, multiple mode splicing, split screen, etc., and also supports OSD picture-in-picture display to realize the control of the display of the 4-channel video signals.

[0057] The host module 1 of the present utility model is described in detail below.

[0058] like Figure 2 As shown, the host module 1 includes: a video signal control unit 01 connected to the video acquisition module 10, an audio signal processing unit 02 connected to the audio signal acquisition module 00, and a conference management control signal processing unit 03 connected to the video signal control unit 01 and the audio signal processing unit 02 respectively.

[0059] Among them, the video signal control unit 01 is used to process the video signal output by the video acquisition module 10, and send the processed video signal to the display module 11; the audio signal processing unit 02 is used to process the wired audio signal and / or the wireless audio signal, and send the processed wired audio signal and / or the wireless audio signal to the audio processor 6; the conference management control signal processing unit 03 is used to manage and control the management signal of the entire wired and wireless integrated video conferencing system.

[0060] Furthermore, if Figure 2 As shown, the host module 1 also includes: a power supply unit 04 connected to the video signal control unit 01, the audio signal processing unit 02 and the conference management control signal processing unit 03; the power supply unit 04 is used to process the AC input signal and provide a power supply signal to the video signal control unit 01, the audio signal processing unit 02 and the conference management control signal processing unit 03.

[0061] Specifically, Figure 3As shown, the power supply unit 04 includes: an AC power port, a switching power supply (LRS-350-24), a first DC-DC module (LMR14030SDDAR), a first LDO module (MS1117-3.3V), a switch module (AO3401A), multiple second DC-DC modules (TD6817-ADJ), a push-pull inverter circuit (TL494 / MMBT5401×2 / WMO60N10T×2), a transformer (T1), a second LDO module (78L12), a third LDO module (79L12), a third DC-DC module (MP4560), a fourth LDO module (AMS1117-3.3, output VCC_3.3V) and a fifth LDO module (AMS1117-3.3, output 485_3.3V).

[0062] The AC power port is used to connect to AC power (AC220V), the input end of the switching power supply is connected to the AC power port, the output end of the switching power supply is respectively connected to the first DC-DC module and the push-pull inverter circuit, the output end of the first DC-DC module is respectively connected to the input end of the first LDO module and the switching module, and the first LDO module outputs a first power supply signal (VCC3.3V). The switching power supply can provide 24V power to the microphone interface, and the first DC-DC module can provide 5V power to the HDMI interface.

[0063] The output end of the switch module is respectively connected to the input end of the multiple second DC-DC modules, and the output end of each second DC-DC module outputs different second power supply signals (VDD3.3V, VDD2.5V, VDD1.5V and VDD1.1V); the input end of the push-pull inverter circuit is connected to the output end of the switching power supply, the output end of the push-pull inverter circuit is connected to the input end of the transformer, the output end of the transformer is respectively connected to the input end of the second LDO module, the input end of the third LDO module and the input end of the third DC-DC module, and the output end of the third DC-DC module is respectively connected to the relay, the fourth LDO module and the fifth LDO module; the output end of the second LDO module outputs the third power supply signal (+12V), the output end of the third LDO module outputs the fourth power supply signal (-12V), the output end of the third DC-DC module outputs the fifth power supply signal (VCC_3.3V), and the output end of the fourth LDO module and the output end of the fifth LDO module respectively output the sixth power supply signal (485_3.3V).

[0064] In some embodiments, Figure 4As shown, the video signal control unit 01 includes: a video processor 16 (MS1826), four HDMI video input interfaces (17, 18, 19, 20) (HDMI_IN_A, HDMI_IN_B, HDMI_IN_C, HDMI_IN_D), four HDMI video output interfaces (21, 22, 23, 24) (HDMI_OUT_A, HDMI_OUT_B, HDMI_OUT_C, HDMI_OUT_D), a matrix MCU 29, a plurality of LED indicator lights 2901, an RS232 conversion chip 2902 (MAX3232ESE), an RS232 interface 2904 (XH2.54), an independent audio signal input interface 26, an independent audio signal output interface 27, an analog-to-digital conversion module 2601 (CJC5340ADC), a digital-to-analog conversion module 2701 (MS7124DAC) and a digital switch 28 (TS3A44159). Among them, the independent audio signal input interface 26 and the independent audio signal output interface 27 are both Phoenix terminals.

[0065] The input ends of the four-way HDMI video input interfaces (17, 18, 19, 20) are connected to the video acquisition module 10, and the output ends of the four-way HDMI video input interfaces (17, 18, 19, 20) are connected to the video processor 16; the input ends of the four-way HDMI video output interfaces (21, 22, 23, 24) are connected to the video processor 16, and the output ends of the four-way HDMI video output interfaces (21, 22, 23, 24) are connected to the display module 11; the matrix MCU 29 is connected to the video processor 16 via I2C, and the matrix MCU 29 is also connected to the audio signal processing unit 02 via UART communication; the matrix MCU 29 is connected to multiple LED indicator lights 2901 via its GPIO port, and the matrix MCU 29 is connected to the RS232 interface 2904 through the RS232 conversion chip 2902, the RS232 interface 2904 is connected to the conference management control signal processing unit 03, the independent audio signal input interface 26 is connected to the digital switch 28 through the analog-to-digital conversion module 2601, the digital switch 28 communicates with the video processor 16 through I2S, and the digital switch 28 is connected to the independent audio signal output interface 27 through the digital-to-analog conversion module 2701.

[0066] Furthermore, if Figure 4As shown, the audio signal processing unit 02 includes: a digital microphone interface 221 (there are 5), an analog microphone interface 331, a first operational amplifier chip 204 (NJM4580×5), a second operational amplifier chip 401 (NJM4580×3), a third operational amplifier chip 301 (NJM4580), a fourth operational amplifier chip 501 (NJM4580×2), a tuning and volume adjuster (502, 503) (DSP_YY686 / PT2259), a fifth operational amplifier chip 505 (NJM4580), a first relay 402 (relay×3), an audio partition output port 51, a second relay 504, a third relay 506 and an audio mixing output port 52.

[0067] The conference management control signal processing unit 03 includes: an RS232 interface 702, an RS232 conversion chip 801 (MAX3232ESE), an RS485 interface 802, a first RS485 conversion chip 801 (SP3075EE), an LED status light 1101, a TFT display screen 121, a DSP potential selection port 91, a network port chip 1301 (DP83848C), a fourth relay 201, a second RS485 conversion chip 202 (SP3075EE×5), an AND gate 203 (N74AHC08) and a host MCU 111 (STM32F207ZGT).

[0068] The digital microphone interface 221 is connected to the antenna box 2 and the wired digital unit through a six-core dedicated cable, and the analog microphone interface 331 is connected to the wired analog unit; the input end of the first operational amplifier chip 204 is connected to the digital microphone interface 221, the first output end of the first operational amplifier chip 204 is connected to the input end of the second operational amplifier chip 401, the second output end of the first operational amplifier chip 204 is connected to the fourth operational amplifier chip 501, and the output end of the second operational amplifier chip 401 is connected to the audio partition output port 501 through the first relay 402. 1 connection; the input end of the third operational amplifier chip 301 is connected to the analog microphone interface 331, the output end of the third operational amplifier chip 301 is connected to the fourth operational amplifier chip 501, the fourth operational amplifier chip 501 is connected to the tuning and volume adjuster (502, 503), the tuning and volume adjuster (502, 503) is sequentially connected to the audio mixing output port 52 through the fifth operational amplifier chip 505 and the third relay 506, and the tuning and volume adjuster (502, 503) is also connected to the host MCU 111 through the second relay 504. The host MCU 111 is respectively connected to the LED status light 1101 and the DSP potential selection port through GPIO.

[0069] The RS232 interface 702 is connected to the video signal control unit 01, the RS232 conversion chip 701 is respectively connected to the RS232 interface 702 and the host MCU 111, the host MCU 111 is connected to the RS485 interface 802 through the first RS485 conversion chip, the host MCU 111 is respectively connected to the LED status light 1101, the TFT display screen 121, the DSP potential selection port 91, the fourth relay 201 and the gate 203 and the second RS485 conversion chip 202, the second RS485 conversion chip 202 is connected to the gate 203, and the second RS485 conversion chip 202 is also connected to the digital microphone interface 221 through the fourth relay 201.

[0070] like Figure 3 As shown, the system is connected to 220V AC power, which is stepped down and rectified into 24V DC by the switching power supply. The 24V DC power is stepped down to 5V by the first DC-DC module, and then converted to 3.3V by the first LDO module to power the MCU (HC32F460KCTA) and RS232 conversion chip (MAX3232ESE). Then, it is converted into 3.3V, 2.5V, 1.5V, and 1.1V by multiple second DC-DC modules (TD6817_ADJ) to power the ADC (CJC5340), DAC (MS7214), and video processor (MS1826). In addition, the 24V DC power is converted into +12V and -12V by the third LDO module, the fourth LDO module and the third DC-DC module through the push-pull inverter circuit, the transformer, and the rectifier bridge to power the operational amplifier chip, and then converted into 3.3V to power the host MCU111, LED, Flash, Ethernet, RS232 chip, RS485 chip, and AND gate chip. The 24V DC power also powers the 6-channel microphone interface.

[0071] like Figure 4 As shown, the video signal control unit 01 is mainly used to process the video signal, which can support 4-way HDMI video source input, and output 4-way video signals to the display module 11 after the video processor 16. The display module 11 displays the 4-way video signals, and can realize wireless switching of up to 4K resolution, multi-mode image stitching, segmentation and camera tracking functions. The matrix MCU 29 is connected to the video processor 16 through I2C to realize the control of the video processor 16. In addition, the matrix MCU 29 communicates with the host MCU 111 through UART, and the TFT_LCD display 121 and the host MCU 111 also communicate through UART to realize the screen touch control of the video matrix functions. The video processor 16 can also realize the embedding and de-embedding of one independent audio. As shown Figure 4As shown, an independent audio signal is input through an independent audio signal input interface 26, passes through an analog-to-digital conversion module 2601 to a digital switch 28 and enters the video processor 16 for embedding, and then comes out from the digital switch 28 to a digital-to-analog conversion module 2701 and outputs an independent audio signal through an independent audio signal output interface 27 to achieve de-embedding.

[0072] The audio signal processing unit 02 is mainly used to process the audio signal of the conference system. After the wired and wireless units pick up the sound, it is input through the digital microphone interface 221 and the analog microphone interface 331, and is differentially converted, filtered, and mixed by the NJM4580 operational amplifier chip step by step. After tuning and volume adjustment, it is differentially converted and output to the audio mixing output port 52. At this time, three of the five audio signals from the first operational amplifier chip 204 are multiplexed as partition outputs to realize the use of audio multi-conference room partition sound reinforcement.

[0073] The conference management control signal processing unit 03 is mainly responsible for controlling and processing the management signal of the entire system. Among them, the conference mode and unit number (wired unit number and wireless unit number), identification and other information are all managed and controlled by the RS485 bus. Specifically, it is controlled by multiple SP3075EE circuits communicating with the host MCU111. 601 (XH2.54) is a UART external interface for communication with a video signal control module, RS232 interface 702 can be connected to the central control device 12 to realize remote control; RS485 interface 802 can be connected to other peripherals supporting 485 communication to realize extended control; Flash 101 can store system data; DSP potential selection port 91 can realize manual switching to enable DSP module function; STM upgrade port 100 can perform software upgrade on the host MCU 111; LED status light 1101 is used to indicate the working status of the system; network port 1302 can connect the host MCU 111 to Ethernet to realize control of the upper computer 9; the real-time clock 14 shown is used to calibrate the system time; the oscillation source (crystaloscillator) 15 is responsible for providing the system with accurate oscillation frequency.

[0074] The host module of the utility model supports the input and output of four-channel HDMI video signals, seamless switching, segmentation, and splicing, supports OSD picture-in-picture function and display parameter setting function, and the highest resolution can reach 4K. The utility model integrates the three systems of wired conference system, wireless conference system, and video matrix into one, realizing stable, high-fidelity, and high-definition audio and video signal transmission. It has the conference management function and can simultaneously number all wired units and wireless units, identify identities, and manage speech priorities; it also supports host computer operation, and can realize camera tracking, multi-conference room screen switching, multi-party remote video and other functions. One machine has multiple uses, providing users with a better conference system solution, and construction and maintenance are more convenient, which greatly reduces the equipment cost, construction cost and maintenance cost of the user end.

[0075] It should be noted that the present invention only uses the hardware functions of the host module 1, that is, the chips, processors, etc. used in the host module 1 are all existing hardware functions. At the same time, the communication between the host module 1 and the host computer 9 and the central control device 12 also adopts the conventional functions of the host module.

[0076] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot limit the protection scope of the utility model. All equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A wired and wireless converged video conferencing system, characterized in that: include: An audio signal acquisition module, a transmission cable, a host module, a video acquisition module, and a display module connected to the host module; The audio signal acquisition module is connected to the host module through the transmission cable, and is used to collect wired audio signals and wireless audio signals at the scene, and transmit the wired audio signals and the wireless audio signals to the host module through the transmission cable; The video acquisition module is connected to the host module and is used to acquire video signals and send the video signals to the host module; The host module is used to process the wired audio signal and / or the wireless audio signal and output the processed audio signal, and to process the video signal and send the video signal to the display module so that the video signal can be displayed through the display module.

2. The wired and wireless converged video conferencing system according to claim 1, characterized in that: The audio signal acquisition module includes: multiple groups of wired units, multiple wireless units and an antenna box; each group of the wired units includes: multiple independent wired units; Each group of the wired units is connected to the host module via a transmission cable, and the antenna box is connected to the host module via a transmission cable; Each group of the wired units transmits the collected wired audio signals to the host module via the transmission cables connected thereto; The multiple wireless units communicate with the antenna box and send the collected wireless audio signals to the antenna box; The antenna box transmits the received wireless audio signal to the host module via a transmission cable connected thereto.

3. The wired and wireless converged video conferencing system according to claim 1, characterized in that: The transmission cable is a six-core special cable; The six-core dedicated cable transmits control signals, information data and audio signals simultaneously.

4. The wired and wireless converged video conferencing system according to claim 1, characterized in that: Also includes: An audio processor connected to the host module, an audio power amplifier connected to the audio processor, and a playback device connected to the audio power amplifier; The audio processor is used to perform tuning processing on the processed audio signal output by the host module; The audio power amplifier performs power amplification processing on the audio signal tuned by the audio processor and transmits the amplified audio signal to the playback device, so that the audio signal is played by the playback device.

5. The wired and wireless converged video conferencing system according to claim 1, characterized in that: Also includes: A host computer connected to the host module; The host computer receives the audio / video signals uploaded by the host module and outputs and displays the audio / video signals, and sends the operation information input by the user to the host module.

6. The wired and wireless converged video conferencing system according to claim 1, characterized in that: Also includes: A central control device connected to the host module; The central control device receives the audio / video signal uploaded by the host module, and sends the operation information input by the user to the host module.

7. The wired and wireless converged video conferencing system according to any one of claims 1 to 6, characterized in that: The host module includes: a video signal control unit connected to the video acquisition module, an audio signal processing unit connected to the audio signal acquisition module, and a conference management control signal processing unit connected to the video signal control unit and the audio signal processing unit respectively; The video signal control unit is used to process the video signal output by the video acquisition module and send the processed video signal to the display module; The audio signal processing unit is used to process the wired audio signal and / or the wireless audio signal, and send the processed wired audio signal and / or the wireless audio signal to the audio processor; The conference management control signal processing unit is used to manage and control the management signals of the entire wired and wireless integrated video conferencing system.

8. The wired and wireless converged video conferencing system according to claim 7, characterized in that: The video signal control unit includes: a video processor, four HDMI video input interfaces, four HDMI video output interfaces, a matrix MCU, multiple LED indicator lights, an RS232 conversion chip, an RS232 interface, an independent audio signal input interface, an independent audio signal output interface, an analog-to-digital conversion module, a digital-to-analog conversion module, and a digital switch; The input ends of the four-way HDMI video input interface are connected to the video acquisition module, and the output ends of the four-way HDMI video input interface are connected to the video processor; the input ends of the four-way HDMI video output interface are connected to the video processor, and the output ends of the four-way HDMI video output interface are connected to the display module; the matrix MCU is connected to the video processor through I2C, and the matrix MCU is also connected to the audio signal processing unit through UART communication; the matrix MCU is connected to the multiple LED indicator lights through its GPIO port, the matrix MCU is connected to the RS232 interface through the RS232 conversion chip, the RS232 interface is connected to the conference management control signal processing unit, the independent audio signal input interface is connected to the digital switch through the analog-to-digital conversion module, the digital switch communicates with the video processor through I2S, and the digital switch is connected to the independent audio signal output interface through the digital-to-analog conversion module.

9. The wired and wireless converged video conferencing system according to claim 7, characterized in that: The audio signal processing unit includes: a digital microphone interface, an analog microphone interface, a first operational amplifier chip, a second operational amplifier chip, a third operational amplifier chip, a fourth operational amplifier chip, a tuning and volume regulator, a fifth operational amplifier chip, a first relay, an audio partition output port, a second relay, a third relay and an audio mixing output port; The conference management control signal processing unit includes: an RS232 interface, an RS232 conversion chip, an RS485 interface, a first RS485 conversion chip, an LED status light, a TFT display, a DSP potential selection port, a network port chip, a fourth relay, a second RS485 conversion chip, an AND gate, and a host MCU; The digital microphone interface is connected to the antenna box and the wired digital unit through a six-core dedicated cable, respectively, and the analog microphone interface is connected to the wired analog unit; the input end of the first operational amplifier chip is connected to the digital microphone interface, the first output end of the first operational amplifier chip is connected to the input end of the second operational amplifier chip, the second output end of the first operational amplifier chip is connected to the fourth operational amplifier chip, and the output end of the second operational amplifier chip is connected to the audio partition output port through the first relay; the input end of the third operational amplifier chip is connected to the analog microphone interface, the output end of the third operational amplifier chip is connected to the fourth operational amplifier chip, the fourth operational amplifier chip is connected to the tuning and volume adjuster, and the tuning and volume adjuster is connected to the audio mixing output port through the fifth operational amplifier chip and the third relay in sequence, and the tuning and volume adjuster is also connected to the host MCU through the second relay; The RS232 interface is connected to the video signal control unit, the RS232 conversion chip is respectively connected to the RS232 interface and the host MCU, the host MCU is connected to the RS485 interface through the first RS485 conversion chip, the host MCU is respectively connected to the LED status light, the TFT display screen, the DSP potential selection port, the fourth relay, the AND gate and the second RS485 conversion chip, the second RS485 conversion chip is connected to the AND gate, and the second RS485 conversion chip is also connected to the digital microphone interface through the fourth relay.

10. The wired and wireless converged video conferencing system according to claim 7, characterized in that: The host module further includes: a power supply unit connected to the video signal control unit, the audio signal processing unit and the conference management control signal processing unit; the power supply unit is used to process the AC input signal and provide a power supply signal to the video signal control unit, the audio signal processing unit and the conference management control signal processing unit; The power supply unit includes: an AC power port, a switching power supply, a first DC-DC module, a first LDO module, a switch module, multiple second DC-DC modules, a push-pull inverter circuit, a transformer, a second LDO module, a third LDO module, a third DC-DC module, a fourth LDO module and a fifth LDO module; The AC power port is used to connect to AC power, the input end of the switching power supply is connected to the AC power port, the output end of the switching power supply is respectively connected to the first DC-DC module and the push-pull inverter circuit, the output end of the first DC-DC module is respectively connected to the input end of the first LDO module and the switching module, and the first LDO module outputs a first power supply signal; The output end of the switch module is respectively connected to the input end of the multiple second DC-DC modules, and the output end of each second DC-DC module outputs a different second power supply signal; the input end of the push-pull inverter circuit is connected to the output end of the switching power supply, the output end of the push-pull inverter circuit is connected to the input end of the transformer, the output end of the transformer is respectively connected to the input end of the second LDO module, the input end of the third LDO module and the input end of the third DC-DC module, and the output end of the third DC-DC module is respectively connected to the relay, the fourth LDO module and the fifth LDO module; the output end of the second LDO module outputs the third power supply signal, the output end of the third LDO module outputs the fourth power supply signal, the output end of the third DC-DC module outputs the fifth power supply signal, and the output end of the fourth LDO module and the output end of the fifth LDO module respectively output the sixth power supply signal.

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