AR video long-distance transmission system

Abstract

The invention discloses an AR (Augmented Reality) video long-distance transmission system, which comprises an AR analog video signal conditioning circuit, an AR video long-distance transmitting circuit, an AR video long-distance transmission layer and an AR video long-distance receiving circuit. The AR video remote transmission circuit converts the AR video signal into a differential signal; the AR video long-distance transmission layer transmits differential signals; and the AR video remote receiving circuit converts the differential signal into an AR video, and completes signal gain control, frequency compensation and time adjustment at the same time. The system is high in real-time performance and meets the requirements of a high-real-time control system; aR video long-distance transmission is supported, and the distance can reach 300 m; an analog video and a single-ended pulse signal are transmitted in a differential signal manner, so that the anti-interference capability is high; analog video signal gain and frequency compensation is supported, and the video quality is improved; a CAT-5 / CAT-6 / CAT-7 type cable is adopted as a transmission medium, precious and heavy coaxial cables are replaced, and the deployment cost and the construction difficulty are low. The transmission system can meet the AR video sharing requirement of a command and control system.

Description

Technical Field

[0001] This invention belongs to the field of command and control system technology, and in particular to an AR video long-distance transmission system. Background Technology

[0002] A fully distributed command and control system requires shared sensor video resources and supports the integrated processing of sensor video information and command and control information. Currently, my country mainly uses direct video signal transmission and network digital video bus technology in its command and control systems, recovering the video signal at each user end through receiving equipment. However, this approach has the following problems:

[0003] 1) Direct transmission of video signals: Pulse signals are transmitted using RS422 differential signals, while analog video signals are transmitted using coaxial cables. However, the maximum transmission distance for analog video signals is 100 meters. Video signals suffer from attenuation, are susceptible to interference, and exhibit signal asynchrony issues due to inconsistent delays between multiple video signals. Furthermore, the cables are numerous, bulky, and inconvenient to deploy.

[0004] 2) Network digital video bus technology: The acquisition, compression, encoding, transmission, decompression and decoding of video results in a large system delay, reaching 100ms, which is difficult to meet the requirements of some high real-time control systems; the system consists of video front-end, network transmission equipment and back-end receiving equipment, which is complex in structure and has high deployment cost. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing an AR video long-distance transmission system that features long transmission distance, simple structure, low deployment cost, and strong anti-interference capability.

[0006] The technical solution to achieve the objective of this invention is as follows: an AR video long-distance transmission system, comprising four parts: an AR analog video signal conditioning circuit, an AR video long-distance transmission circuit, an AR video long-distance transmission layer, and an AR video long-distance receiving circuit; the AR analog video signal conditioning circuit is used to condition the AR video analog signal; the AR video long-distance transmission circuit is used to convert the conditioned AR video analog signal into a differential signal; the AR video long-distance transmission layer is used to transmit the differential signal; and the AR video long-distance receiving circuit is used to convert the differential signal into AR video, while simultaneously performing signal gain control, frequency compensation, and time adjustment.

[0007] Furthermore, the AR video signal includes three analog video signals, supporting analog video signals for sea, air, and land targets.

[0008] Furthermore, the AR video long-distance transmission circuit converts the AR video signal into three sets of differential signals for transmission.

[0009] Furthermore, in each sensor AR video, two pulse signals are transmitted as differential signal group common mode signals, and the two pulse signals include a trigger pulse signal and a gate pulse signal.

[0010] Furthermore, the AR analog video signal conditioning circuit includes a first capacitor, a second capacitor, a first resistor, and a second resistor; one end of the first capacitor is connected to the AR analog video signal input, and the other end is connected to the input terminal of the AR video long-distance transmission circuit; one end of the first resistor is connected to the AR analog video signal input, and the other end is connected to one end of the second capacitor; the other end of the second capacitor is connected to the input terminal of the AR video long-distance transmission circuit; one end of the second resistor is connected to the AR analog video signal input, and the other end is connected to the input terminal of the AR video long-distance transmission circuit.

[0011] Furthermore, the AR video long-distance transmission circuit uses the EL4543 chip. The three analog video signals are connected to the three video input channels of the EL4543 chip after impedance matching. The trigger pulse signal is connected to the HSYNC terminal of the EL4543 chip, and the gate pulse signal is connected to the VSYNC terminal of the EL4543 chip.

[0012] Furthermore, the AR video long-distance transmission layer uses CAT-5 / CAT-6 / CAT-7 cables. One end of the three twisted pairs in the cable is connected to the three AR video differential output channels of the AR video long-distance transmission circuit, and the other end is connected to the three AR video differential input channels of the AR video long-distance receiving circuit.

[0013] Furthermore, the AR video long-distance receiving circuit includes a differential signal conversion circuit, a time adjustment circuit, and a main control circuit; the differential signal conversion circuit is used to convert the received AR video differential signal into an analog video signal, a trigger pulse signal, and a gate pulse signal, while simultaneously performing signal gain control and frequency compensation; the time adjustment circuit is used to receive the analog video signal output by the differential signal conversion circuit and adjust the time parameters; the main control circuit is used to adjust the time delay parameters of the time adjustment circuit and the gain control and frequency compensation parameters of the differential signal conversion circuit.

[0014] Furthermore, the differential signal conversion circuit uses the ISL59910 chip. The AR video differential signal is connected to the differential input channel of the chip. The ISL59910 outputs three analog video signals and two pulse signals, including a trigger pulse signal and a gate pulse signal. The two pulse signals are output to external devices.

[0015] Furthermore, the main control circuit also includes a digital-to-analog converter circuit for outputting three gain control signals and one frequency compensation control signal to a differential signal conversion circuit; the three gain control signals and one frequency compensation control signal of the ISL59910 chip are controlled by the main control circuit.

[0016] Compared with the prior art, the significant advantages of this invention are:

[0017] (1) It has strong real-time performance and meets the requirements of high real-time control systems.

[0018] (2) Supports long-distance AR video transmission up to 300m, and supports differential video transmission of AR video over long distance. Analog video and single-ended pulse signal are transmitted as differential signals, with strong anti-interference capabilities.

[0019] (3) Analog video and single-ended pulse signals are transmitted as differential signals, which has strong anti-interference ability.

[0020] (4) Supports analog video signal gain and frequency compensation to improve video quality.

[0021] (5) Supports power failure configuration information recovery.

[0022] (6) Supports analog signal time adjustment and synchronization function.

[0023] (7) The system architecture is simple and the cost is low.

[0024] (8) The transmission medium uses CAT-5 / CAT-6 / CAT-7 cables instead of expensive and bulky coaxial cables, resulting in lower deployment costs and construction difficulty.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a block diagram of an AR video long-distance transmission system in one embodiment.

[0027] Figure 2 This is a block diagram of an AR analog video signal conditioning circuit in one embodiment.

[0028] Figure 3 This is a block diagram of an AR video long-distance transmission circuit in one embodiment.

[0029] Figure 4 This is a block diagram of pulse signal common-mode signal encoding for an AR video long-distance transmission circuit in one embodiment.

[0030] Figure 5 This is a block diagram of an AR video long-distance transmission layer in one embodiment.

[0031] Figure 6This is a block diagram of an AR video long-distance receiving circuit in one embodiment.

[0032] Figure 7 This is a block diagram of a differential signal conversion circuit in one embodiment.

[0033] Figure 8 This is a block diagram of a time adjustment circuit in one embodiment.

[0034] Figure 9 This is a block diagram of the main control circuit in one embodiment. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0038] In one embodiment, combined Figure 1This invention provides an AR video long-distance transmission system, comprising four parts: an AR analog video signal conditioning circuit, an AR video long-distance transmission circuit, an AR video long-distance transmission layer, and an AR video long-distance receiving circuit. The AR video signal output from the front-end sensor is sent to the AR analog video signal conditioning circuit. This circuit conditions the AR video analog signal before transmitting it to the AR video long-distance transmission circuit. The AR video long-distance transmission circuit converts the analog video signal and pulse signal into three sets of AR video differential signals, denoted as the first set, the second set, and the third set, respectively. These signals are then transmitted through the AR video long-distance transmission layer to the AR video long-distance receiving circuit. The three sets of AR video differential signals are then converted back into analog video signals and pulse signals, and output to the back-end command and control equipment to achieve AR video sharing.

[0039] Furthermore, in one embodiment, Figure 2 The diagram shows a block diagram of an AR analog video signal conditioning circuit. The AR analog video signal conditioning circuit includes a first capacitor C1, a second capacitor C2, a first resistor R1, and a second resistor R2. One end of the first capacitor C1 is connected to the AR analog video signal input, and the other end is connected to the input terminal of the AR video long-distance transmission circuit. One end of the first resistor R1 is connected to the AR analog video signal input, and the other end is connected to one end of the second capacitor C2. The other end of the second capacitor C2 is connected to the input terminal of the AR video long-distance transmission circuit. One end of the second resistor R1 is connected to the AR analog video signal input, and the other end is connected to the input terminal of the AR video long-distance transmission circuit.

[0040] Preferably, the first resistor R1 has a value of 30Ω; the second capacitor C2 has a value of 30pF; and the second resistor R2 has a value of 50Ω.

[0041] Furthermore, in one embodiment, combined with Figure 3 Each AR video input channel includes three analog video signals (supporting analog video signals for sea, air, and land targets) and two pulse signals (single-ended TTL, supporting trigger and gate signals). The transmitting circuit uses the EL4543 chip. The three analog video input signals are impedance matched and then connected to the three differential input channels of the EL4543 chip. The pulse signal (trigger) is connected to the HSYNC pin of the EL4543 chip, and the pulse signal (gate) is connected to the VSYNC pin of the EL4543 chip. The EL4543 chip outputs three sets of AR video differential signals, which are transmitted over long distances through the AR video long-distance transmission layer.

[0042] It should be noted that this is not limited to using the EL4543 chip.

[0043] Furthermore, in one embodiment, combined with Figure 4 The pulse signal (trigger, gate) (TTL / CMOS logic level) is encoded into a common-mode signal of three sets of AR video differential signals. For example: the trigger pulse signal LOW and the gate pulse signal HIGH are encoded as the first group of AR video differential signals, the second group of AR video differential signals, and the third group of AR video differential signals, with output common-mode signals of 3.0V, 2.0V, and 2.5V respectively; the trigger pulse signal LOW and the gate pulse signal LOW are encoded as the first group of AR video differential signals, the second group of AR video differential signals, and the third group of AR video differential signals, with output common-mode signals of 2.5V, 3.0V, and 2.0V respectively; the trigger pulse signal HIGH and the gate pulse signal LOW are encoded as the first group of AR video differential signals, the second group of AR video differential signals, and the third group of AR video differential signals, with output common-mode signals of 2.0V, 3.0V, and 2.5V respectively; the trigger pulse signal HIGH and the gate pulse signal HIGH are encoded as the first group of AR video differential signals, the second group of AR video differential signals, and the third group of AR video differential signals, with output common-mode signals of 2.5V, 2.0V, and 3.0V respectively.

[0044] Furthermore, in one embodiment, combined with Figure 5 The AR video long-distance transmission layer uses CAT-5 / CAT-6 / CAT-7 cables. One end of the three twisted pairs in the cable is connected to the three AR video differential output channels of the AR video long-distance transmission circuit, and the other end is connected to the three AR video differential input channels of the AR video long-distance receiving circuit.

[0045] Furthermore, in one embodiment, combined with Figure 6 The AR video long-distance receiving circuit comprises three parts: a differential signal conversion circuit, a time adjustment circuit, and a main control circuit. The differential signal conversion circuit converts the AR video differential signal transmitted from the AR video long-distance transmission layer into an analog video signal and a pulse signal (trigger, gate), while simultaneously performing gain control and frequency compensation. The time adjustment circuit receives the analog video signal output from the differential signal conversion circuit and adjusts the time parameters. The main control circuit communicates with external devices via USB, RS232 / 422 / 485, and Ethernet to control the time delay parameters of the time adjustment circuit and the gain control and frequency compensation parameters of the differential signal conversion circuit.

[0046] In some embodiments, in combination Figure 7The differential signal conversion circuit uses the ISL59910 chip. The three sets of AR video differential signals transmitted by the AR video long-distance transmission layer are connected to the three sets of differential video input pins of this chip. The ISL59910 outputs three analog video signals (supporting analog video signals for sea, air, and land targets) and two pulse signals (trigger signal and gate signal). Two of the pulse signals are output to external command and control equipment. Simultaneously, it receives three gain control signals and one frequency compensation control signal from the main control circuit to achieve gain control and frequency compensation.

[0047] In some embodiments, the main control circuit further includes a digital-to-analog converter circuit for outputting three gain control signals and one frequency compensation control signal to a differential signal conversion circuit; the three gain control signals and one frequency compensation control signal of the ISL59910 chip are controlled by the main control circuit.

[0048] Here, in some embodiments, combined with Figure 8 The time adjustment circuit uses the ISL59922 chip. The three analog video signals (simulated video signals for sea, air, and land targets) output from the differential signal conversion circuit are connected to the three analog video input pins of the chip. Under the control of the main control circuit, time synchronization adjustment is completed, with a time adjustment parameter accuracy of 1ns and a maximum time delay of 31ns. The chip outputs the adjusted three analog video signals to external command and control equipment.

[0049] Here, in some embodiments, combined with Figure 9 The main control circuit is based on a microprocessor CPU design, such as the C51 series or ARM series microprocessors.

[0050] In some embodiments, the microprocessor communicates with external devices via USB, RS232 / 422 / 485, or Ethernet. The SPI interface controls the time delay parameters of the time adjustment circuit; a digital-to-analog converter outputs three gain control signals and one frequency compensation control signal to the differential signal conversion circuit. The main control circuit is configured with an EEPROM to store configuration information in an I2C EEPROM. If the system powers off and restarts, the microprocessor reads the information and restores the device's operating parameters.

[0051] The AR video long-distance receiving circuit supports differential video transmission over long distances and has strong anti-interference capabilities; it supports analog video signal gain and frequency compensation to improve video quality; it supports power-off configuration information recovery and analog signal time adjustment synchronization functions.

[0052] The AR video long-distance transmission system proposed in this invention meets the AR video sharing requirements of the command and control system, and can also meet the AR differential video transmission, reception and display requirements of the command and control system.

[0053] It should be noted that any technical features in this invention that may imply software programs are existing technologies. The essence of the solution is to propose and improve the composition and connection relationship of the hardware, and does not involve any improvement to the software program itself.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention without departing from its spirit and scope should be included within the protection scope of the present invention.

Claims

1. An AR video long-distance transmission system, characterized in that, The system comprises four parts: an AR analog video signal conditioning circuit, an AR video long-distance transmission circuit, an AR video long-distance transmission layer, and an AR video long-distance receiving circuit. The AR analog video signal conditioning circuit is used to condition the AR video analog signal. The AR video long-distance transmission circuit is used to convert the conditioned AR video analog signal into a differential signal. The AR video long-distance transmission layer is used to transmit the differential signal. The AR video long-distance receiving circuit is used to convert the differential signal into AR video, while simultaneously performing signal gain control, frequency compensation, and time adjustment.

2. The AR video long-distance transmission system according to claim 1, characterized in that, The AR video simulation signal includes three channels of simulation video signals, supporting simulation video signals for sea, air, and land targets.

3. The AR video long-distance transmission system according to claim 2, characterized in that, The AR video long-distance transmission circuit converts the AR video signal into three sets of differential signals for transmission.

4. The AR video long-distance transmission system according to claim 2, characterized in that, In each sensor AR video, two pulse signals are transmitted as differential signal groups in common mode. The two pulse signals include a trigger pulse signal and a gate pulse signal.

5. The AR video long-distance transmission system according to claim 2, characterized in that, The AR analog video signal conditioning circuit includes a first capacitor, a second capacitor, a first resistor, and a second resistor; one end of the first capacitor is connected to the AR analog video signal input, and the other end is connected to the input terminal of the AR video long-distance transmission circuit; one end of the first resistor is connected to the AR analog video signal input, and the other end is connected to one end of the second capacitor; the other end of the second capacitor is connected to the input terminal of the AR video long-distance transmission circuit; one end of the second resistor is connected to the AR analog video signal input, and the other end is connected to the input terminal of the AR video long-distance transmission circuit.

6. The AR video long-distance transmission system according to claim 2, characterized in that, The AR video long-distance transmission circuit uses the EL4543 chip. The three analog video signals are connected to the three video input channels of the EL4543 chip after impedance matching. The trigger pulse signal is connected to the HSYNC terminal of the EL4543 chip, and the gate pulse signal is connected to the VSYNC terminal of the EL4543 chip.

7. The AR video long-distance transmission system according to claim 1, characterized in that, The AR video long-distance transmission layer uses CAT-5 / CAT-6 / CAT-7 cables. One end of the three twisted pairs in the cable is connected to the three AR video differential output channels of the AR video long-distance transmission circuit, and the other end is connected to the three AR video differential input channels of the AR video long-distance receiving circuit.

8. The AR video long-distance transmission system according to claim 1, characterized in that, The AR video long-distance receiving circuit includes a differential signal conversion circuit, a time adjustment circuit, and a main control circuit. The differential signal conversion circuit converts the received AR video differential signal into an analog video signal, a trigger pulse signal, and a gate pulse signal, while simultaneously performing signal gain control and frequency compensation. The time adjustment circuit receives the analog video signal output from the differential signal conversion circuit and adjusts the time parameters. The main control circuit adjusts the time delay parameters of the time adjustment circuit and the gain control and frequency compensation parameters of the differential signal conversion circuit.

9. The AR video long-distance transmission system according to claim 8, characterized in that, The differential signal conversion circuit uses the ISL59910 chip. The AR video differential signal is connected to the differential input channel of the chip. The ISL59910 outputs 3 analog video signals and 2 pulse signals, including trigger pulse signal and gate pulse signal. Two pulse signals are output to external devices.

10. The AR video long-distance transmission system according to claim 8, characterized in that, The main control circuit also includes a digital-to-analog converter circuit, which outputs three gain control signals and one frequency compensation control signal to a differential signal conversion circuit; the three gain control signals and one frequency compensation control signal of the ISL59910 chip are controlled by the main control circuit.

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