A high-definition low-latency audio-video long-distance transmission device

Abstract

The application belongs to the technical field of network communication, and particularly relates to a high-definition low-latency audio and video long-distance transmission device. The high-definition low-latency audio and video long-distance transmission device comprises a high-definition audio and video interface box and a high-definition audio and video adapter which are used in cooperation, wherein the high-definition audio and video interface box and the high-definition audio and video adapter each comprise a cover plate assembly, a casing assembly and an internal module; the cover plate assembly is connected with the casing assembly through a connecting piece and forms a sealed cavity; and the internal module is placed in the sealed cavity and is overlapped with the casing assembly. The device adopts a whole machine sealing mode, the cover plate adopts a double-layer sealing design, and the jack assembly adopts an integrated processing forming mode, so that a complete sealed shielding chamber is formed in the device. The internal module is located in the casing assembly and is physically isolated from the external environment. Meanwhile, the internal module is subjected to a reinforcing design, so that the device can be normally used in a vibration environment such as a vehicle-mounted environment or a ship-mounted environment.

Description

Technical Field

[0001] This invention belongs to the field of network communication technology, and specifically relates to a high-definition, low-latency audio and video long-distance transmission device. Background Technology

[0002] In certain specialized applications, such as directing ships to dock or directing helicopter takeoffs and landings via video, low latency is crucial. High-definition network video signals, due to latency and signal compression issues, can no longer meet these requirements. Therefore, high-definition, low-latency video plays a vital role, enabling operators to monitor and control the system promptly and accurately. In these scenarios, security surveillance cameras and DV cameras are commonly used at the front end, connected to a monitor via high-definition cables for video display. However, situations arise where the control room is far from the cameras. As cable length increases, the signal quality of the high-definition signal degrades and becomes more susceptible to interference, resulting in issues like screen tearing and flickering.

[0003] Currently, the most common solution for high-definition signal transmission in the domestic market is the high-definition optical transceiver, which consists of a high-definition transmitter and a receiver. It transmits high-definition signals via optical fiber using photoelectric conversion, extending the transmission distance to 10-60 km. This device has been widely used in various fields such as large-scale multimedia, information dissemination, and outdoor large-screen display systems.

[0004] While existing devices have many advantages, they are mostly commercial products with poor environmental adaptability and electromagnetic compatibility, making them unsuitable for shipborne, airborne, and vehicle-mounted equipment systems that have high requirements for environmental adaptability and electromagnetic compatibility. Summary of the Invention

[0005] The purpose of this invention is to provide a high-definition, low-latency audio and video long-distance transmission device for use in shipborne, airborne, and vehicle-mounted equipment systems that have high requirements for environmental adaptability and electromagnetic compatibility.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-definition, low-latency audio and video long-distance transmission device includes a high-definition audio and video interface box and a high-definition audio and video adapter used in conjunction. The high-definition audio and video interface box and the high-definition audio and video adapter each include a cover plate assembly, a housing assembly, and an internal module.

[0008] The cover plate assembly is connected to the housing assembly via a connector to form a sealed cavity;

[0009] The internal modules are all placed in a sealed cavity and are connected to the housing assembly.

[0010] As a preferred embodiment, the cover plate assembly adopts a double-layer sealing ring design to ensure the airtightness of the sealed cavity formed by splicing the cover plate assembly and the housing assembly.

[0011] As a preferred embodiment, the housing assembly is composed of a front panel, a rear panel, and a lower cover plate. The splicing surfaces of the front panel, the rear panel, and the lower cover plate are provided with continuous sealing stops and sealing grooves, and are sealed with rubber sealing strips.

[0012] As a preferred embodiment, the connector connecting the cover assembly and the housing assembly is located on the outside of the sealed groove.

[0013] As a preferred solution, the internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter are fixed inside the housing assembly by fasteners and are fixedly connected to the perimeter of the housing assembly.

[0014] As a preferred embodiment, the internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter both include a fully sealed metal-cased filter, which is connected to the housing assembly.

[0015] As a preferred embodiment, the internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter both include a power module, and the power interface of the power module has filtering, surge suppression and isolation designs.

[0016] As a preferred option, the high-definition audio and video interface box and the high-definition audio and video adapter both have a frequency blocking layer on the outside of the cable with a diameter greater than 8cm, and a heat shrink tubing is wrapped and tightened around the frequency blocking layer.

[0017] As a preferred option, metal clamps are used to bond the cable shielding layer to the housing assembly.

[0018] As a preferred option, the connection impedance between the internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter and the chassis components is set to within 10 milliohms.

[0019] The beneficial effects of this invention are:

[0020] 1. This device adopts a fully sealed structure with a double-layer sealed cover. The main circuit boards and components are located inside the device and physically isolated from the external environment, effectively enhancing its three-proof capabilities and reducing the possibility of moisture, salt, and mold accumulation. Simultaneously, the internal modules (circuit boards and internal cable connectors) are reinforced, allowing for normal operation in vibrating environments such as vehicle-mounted and ship-mounted applications.

[0021] 2. The device uses highly conductive aluminum as its material, which undergoes anodizing treatment. The housing assembly is integrally molded, and the cover assembly has grooves with embedded conductive rubber rings, creating a completely sealed shielded chamber inside the equipment. Furthermore, the circular electrical connectors used for external connections (including signal cables, power cables, etc.) are all military-grade connectors with airtight and shielding properties, meeting the special requirements of military environments. The shielding rubber on the connectors fits tightly and seamlessly with the housing assembly, effectively reducing contact resistance and preventing electromagnetic wave leakage. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of a high-definition audio and video interface box.

[0024] Figure 2 This is a structural diagram of a high-definition audio and video adapter.

[0025] Figure 3 This is a schematic diagram illustrating the implementation principle of a high-definition audio and video interface box.

[0026] Figure 4 This is a schematic diagram illustrating the implementation principle of a high-definition audio and video adapter.

[0027] Figure 5 This is a schematic diagram of the HDMI optical transmitter module of a high-definition audio and video interface box.

[0028] Figure 6 This is a schematic diagram of the HDMI optical receiver module of a high-definition audio and video adapter.

[0029] The numbers in the diagram are as follows: 1. Cover plate assembly; 2. Housing assembly; 2-1. Front panel; 2-2. Rear panel; 2-3. Lower cover plate; 3. Power module; 4. Metal-cased fully sealed filter; 5. Transmitter board; 6. Receiver board. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0031] Currently, the most common solution for high-definition signal transmission in the domestic market is the high-definition optical transceiver, which consists of a high-definition transmitter and a receiver. It transmits high-definition signals via optical fiber using photoelectric conversion, extending the transmission distance to 10-60 km. This device has been widely used in various fields such as large-scale multimedia, information dissemination, and outdoor large-screen display systems.

[0032] While existing devices have many advantages, they are mostly commercial products with poor environmental adaptability and electromagnetic compatibility, making them unsuitable for shipborne, airborne, and vehicle-mounted equipment systems that have high requirements for environmental adaptability and electromagnetic compatibility.

[0033] This invention provides a high-definition, low-latency audio and video long-distance transmission device, including a high-definition audio and video interface box and a high-definition audio and video adapter for use in conjunction, as shown in the reference. Figure 1 and Figure 2 The high-definition audio and video interface box and the high-definition audio and video adapter both include a cover plate assembly 1, a housing assembly 2, and an internal module;

[0034] The internal modules of the high-definition audio and video interface box include a power module 3, a fully sealed metal-cased filter 4, and a transmitter board 5; the internal modules of the high-definition audio and video adapter include a power module 3, a fully sealed metal-cased filter 4, and a receiver board 6.

[0035] The cover plate assembly 1 is connected to the housing assembly 2 via a connector to form a sealed cavity;

[0036] All internal modules are placed in a sealed cavity and are connected to the housing assembly 2.

[0037] Power module 3 consists of an AC / DC regulator, filter, protection circuit, etc. Power module 3 converts AC220V to 5V DC power to provide the DC power required for the operation of HDMI optical transmitter module and HDMI optical receiver module.

[0038] The HDMI optical transmitter module of the high-definition audio / video interface box receives HDMI signals and converts them into optical signals for output. The implementation principle of the high-definition audio / video interface box is described in [reference needed]. Figure 3 As shown.

[0039] The design principle of the HDMI optical transmitter module is referenced. Figure 5 As shown. The HDMI decoding chip used is the MS7200 from Hefei Hongjing, a domestic manufacturer. Its main function is to decode HDMI signals, converting the HDMI differential signal into parallel R / G / B, DataClk (pixel clock), HS / VS / DE, and I2S audio signals that can be processed by the FPGA chip. The FPGA used is the SMQ7K325T from Shenzhen Guowei, whose main function is to combine one HDMI signal (including video and audio signals) into one high-speed serial signal for transmission to the optical module.

[0040] The HDMI optical receiver module of the high-definition audio / video adapter receives the optical signal emitted by the HDMI optical transmitter module of the high-definition audio / video interface box and converts the optical signal into an HDMI signal for output. The implementation principle of the high-definition audio / video adapter is described in [reference needed]. Figure 4 As shown.

[0041] The design principle of the HDMI optical receiver module is referenced. Figure 6 As shown. The HDMI encoding chip used is the MS7210, which restores the parallel R / G / B, DataClk (pixel clock), HS / VS / DE, and I2S audio signals into a single HDMI electrical signal. The FPGA used is the SMQ7K325T, whose main function is to recover and output a single HDMI signal (containing video and audio signals) from the optical signal.

[0042] Furthermore, the cover plate assembly 1 adopts a double-layer sealing ring design to ensure the airtightness of the sealed cavity formed by splicing the cover plate assembly 1 and the housing assembly 2.

[0043] The housing assembly 2 is composed of a front panel 2-1, a rear panel 2-2, and a lower cover 2-3. The splicing surfaces of the front panel 2-1, the rear panel 2-2, and the lower cover 2-3 are provided with continuous sealing stops and sealing grooves, and are sealed with rubber sealing strips. The connector connecting the cover assembly 1 and the housing assembly 2 is located on the outside of the sealing groove.

[0044] The housing components 2 of the high-definition audio and video interface box and the high-definition audio and video adapter are both manufactured in one piece. The housing components 2 are made of rust-proof aluminum material, which is passivated and then painted at high temperature.

[0045] Both the high-definition audio / video interface box and the high-definition audio / video adapter adopt a sealed design, with only the cover assembly 1 being openable. Cover assembly 1 employs a double-layer sealing ring design, effectively ensuring the airtightness of the internal components. The front panel 2-1, rear panel 2-2, and lower cover 2-3 are milled and then spliced ​​together. Continuous sealing stops and sealing grooves are designed on the splicing surfaces, and high-strength rubber sealing strips are used for sealing. The deformation and splicing gaps of the housing assembly 2 are strictly controlled to achieve a sealed cavity. Cover assembly 1 and housing assembly 2 are connected by fixing screws, which are designed on the outside of the sealing grooves to ensure the airtightness of the sealed cavity. On the exterior of the housing assembly, all unnecessary grooves, gaps, and blind holes are eliminated to minimize the possibility of moisture, salt, and mold accumulation.

[0046] Furthermore, the internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter are fixed inside the housing assembly 2 by fasteners and are fixedly connected to the perimeter of the housing assembly 2.

[0047] The internal modules are connected to the frame using hard aluminum material, and all connectors and fasteners are made of national standard stainless steel A2 material, ensuring that the device has sufficient strength while ensuring that it is firmly connected, rust-free, and deformation-free under harsh environmental conditions.

[0048] The housing assembly 2 adopts a fully shielded design, and the overlap between the housing assembly and the internal modules maintains good contact. For the gap treatment at the joint of the front panel 2-1, rear panel 2-2 and lower cover 2-3 of the housing assembly 2, conductive rubber gaskets are used, and the pressing depth is increased to improve the shielding effectiveness of the gaps.

[0049] In the treatment of gaps at the joints of various parts of the housing assembly 2, a more detailed analysis and evaluation is conducted by increasing the depth of the crimping analysis. Crimping refers to connecting two or more components together by applying pressure to achieve an electrical or electronic connection. In this case, increasing the depth of the crimping analysis allows for a better understanding of the performance and effectiveness of the crimped area, thereby improving the shielding effectiveness of the gap. This means a more comprehensive analysis of all aspects of crimping, such as the selection of crimping materials, the application of crimping force, and the layout of crimping points. Through in-depth analysis and optimization of the crimping process, the shielding effectiveness of the gap can be improved, reducing the generation and propagation of electromagnetic interference.

[0050] Furthermore, the internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter both include a power module 3, and the power interface of the power module 3 has filtering, surge suppression and isolation designs.

[0051] The internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter both include a fully sealed metal-cased filter 4, which is connected to the housing assembly 2.

[0052] Meanwhile, in order to reduce the spatial coupling between the filter input and output, the filter is designed with a separate compartment inside the housing assembly 2 near the power input connector of the power module, so as to achieve the integration of the filter and the power input connector into a single unit design. This allows the filter and the housing assembly 2 to make surface contact, effectively avoiding signal coupling and transmission of the power input line.

[0053] Furthermore, the cables with a diameter greater than 8cm inside the high-definition audio and video interface box and the high-definition audio and video adapter are all provided with a frequency blocking layer. A heat shrink tubing is wrapped around and tightened on the frequency blocking layer, and a metal pressure plate is used to connect the cable shielding layer to the housing assembly 2.

[0054] The high-speed signals of the high-definition audio and video interface box and the high-definition audio and video adapter are transmitted through optical fiber. When designing cables with a diameter greater than 8cm, such as power cables, analog signal cables, DVI cables, USB signal cables, and clock signal cables inside the housing assembly 2, a braided shielding layer is first added to the outside of the cable, and then a heat shrink tubing is used to tighten the entire cable. A metal pressure plate is used to overlap the cable shielding layer with the housing, so as to achieve a large contact area between the cable shielding layer and the housing, to prevent mutual coupling between cables inside the housing assembly 2, and to avoid interference signals from being radiated through the cables.

[0055] The grounding posts of the high-definition audio / video interface box and high-definition audio / video adapter are made of materials with high conductivity, and the contact resistance is controlled to be within 10 milliohms. Simultaneously, it ensures that the internal modules and housing assembly 2 are properly grounded, and the contact impedance between the internal modules and housing assembly 2 is within 10 milliohms. The contact impedance between external aviation connectors and other structural components and housing assembly 2 is within 10 milliohms. The contact impedance between the cable shielding layer and housing assembly 2 is within 15 milliohms.

[0056] The invention has completed the physical development of the product. The overall structure and installation are problem-free, the equipment sealing structure is intact, and it has passed the ten-day alternating damp heat test, high temperature 65℃ and vehicle-mounted and ship-mounted vibration environment test, electromagnetic compatibility test, IP56 test. After the test, the equipment operates normally and there is no rust on the internal modules.

[0057] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A high-definition, low-latency audio and video long-distance transmission device, comprising a high-definition audio and video interface box and a high-definition audio and video adapter for use in conjunction, characterized in that, The high-definition audio and video interface box and the high-definition audio and video adapter both include a cover plate assembly (1), a housing assembly (2), and an internal module; The cover plate assembly (1) is connected to the housing assembly (2) via a connector to form a sealed cavity; The internal modules are all placed in a sealed cavity and overlap with the housing assembly (2); The cover plate assembly (1) adopts a double-layer sealing ring design to ensure the airtightness of the sealed cavity formed by splicing the cover plate assembly (1) and the housing assembly (2); The housing assembly (2) is composed of a front panel (2-1), a rear panel (2-2), and a lower cover plate (2-3). The splicing surfaces of the front panel (2-1), the rear panel (2-2), and the lower cover plate (2-3) are provided with continuous sealing stops and sealing grooves, and are sealed with rubber sealing strips. The internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter both include a metal-cased fully sealed filter (4), which is connected to the housing assembly (2). The cable shielding layer is bonded to the housing assembly (2) using a metal clamp; The connection impedance between the internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter and the chassis assembly (2) is set to within 10 milliohms.

2. The high-definition, low-latency audio and video long-distance transmission device according to claim 1, characterized in that, The connector connecting the cover plate assembly (1) and the housing assembly (2) is located on the outside of the sealed groove.

3. The high-definition, low-latency audio and video long-distance transmission device according to claim 1, characterized in that, The internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter are fixed inside the housing assembly (2) by fasteners and are fixedly connected to the four sides of the housing assembly (2).

4. The high-definition, low-latency audio and video long-distance transmission device according to claim 1, characterized in that, The internal modules of the high-definition audio and video interface box and the high-definition audio and video adapter both include a power module (3), and the power interface of the power module (3) has filtering, surge suppression and isolation design.

5. A high-definition, low-latency audio and video long-distance transmission device according to claim 1, characterized in that, The high-definition audio and video interface box and the high-definition audio and video adapter have cables with a diameter greater than 8cm inside, and a frequency blocking layer is installed on the outside of the frequency blocking layer and a heat shrink tubing is installed and tightened.

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