A device and method for sharing multi-position image information in a ship system

Abstract

This invention provides an apparatus and method for sharing image information among multiple stations in a ship system, belonging to the field of image information sharing and network transmission. It includes multiple stations connected to the same common switching unit via a network for information sharing and interoperability. Each station includes multiple channels, an internal switching unit, a configuration management unit, and a dual-redundant network management unit. Multiple channels, the configuration management unit, and the dual-redundant network management unit of the same station are simultaneously connected to the internal switching unit. Each channel includes an HDMI interface, a screen, a video resolution detection unit, a video output interface unit, a video encoding unit, a video decoding unit, and a network video control unit. This invention also provides a method for operating the above apparatus. This invention solves the problem of image information sharing among multiple screen terminals in a distributed system.

Description

Technical Field

[0001] This invention belongs to the field of image information sharing and network transmission, and more specifically, relates to an apparatus and method for sharing image information among multiple stations in a ship system. Background Technology

[0002] Humans acquire approximately 70% of all information through vision, and video information possesses advantages such as intuitiveness and credibility. Video-related applications have become an indispensable part of work and life, and the domestic video service ecosystem has fully entered the high-definition era. Video encoding and decoding are indispensable technologies in video applications, serving as the foundation and key technology for video surveillance. With video services fully entering the high-definition and ultra-high-definition era, video transmission and processing technologies are increasingly exhibiting distributed and digital characteristics. The complexity and functional integration capabilities of video system applications are also demanding higher levels of sophistication, particularly in collaborative office work, video conferencing, security monitoring, and video command and dispatch, where the requirement for unified resources and integrated applications has become the mainstream trend in the current video system industry.

[0003] Patent application No. 202010771327.4 discloses a graphics processing method for an integrated display system based on an embedded platform. Its technical features include: acquiring 4K raw video via an HDMI input interface, encoding it with H.264, encapsulating the stream into an RTSP protocol, and pushing it over the network; receiving and decoding three 4K network video streams; and processing the decoded video using a fusion algorithm and overlaying it onto a background video for display. The image processing engine performs preprocessing, format conversion, image quality enhancement, and fusion / overlay operations on the acquired images; the hardware codec encodes the video images and then pushes them based on the RTSP protocol. This method achieves overlay and fusion processing of network video streams on an embedded platform.

[0004] Patent application number 202021966548.9 discloses a network high-definition video image overlay device based on the HiSilicon HI3520 platform. This utility model achieves low cost and high performance by utilizing the mass-produced HiSilicon NVR chip HI3520: it simultaneously supports rapid geometric image overlay with an image update frequency as fast as 10 milliseconds. This image overlay device can simultaneously support high-speed overlay of up to 256 images, and each device supports image overlay from two network high-definition cameras, further reducing costs. The key feature of this utility model is the use of HiSilicon chips for image overlay.

[0005] Patent application No. 202110948570.3 discloses a method for real-time decompression and display of multiple H.265 video streams. The key feature of this invention is that when processing multiple H.265 streams, the entire receiver can complete the process from receiving the Ethernet decompressed video to decompressing, transcoding, and displaying the video in less than 30ms per stream, thus optimizing the receiver's processing efficiency.

[0006] Patent application No. 202110477117.9 discloses a method and system for implementing multi-screen overlay using a HiSilicon codec chip. By using a HiSilicon codec chip, different implemented screens are overlaid together to form new and more complex screens, thereby enriching the content displayed on the screen and providing more colorful display images.

[0007] However, none of the above patent documents disclose a method for sharing image information from multiple cameras. Therefore, it is necessary to develop a method for sharing image information from multiple cameras. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a device and method for sharing image information across multiple stations in a ship system. The device of the present invention can realize multiple functions such as encoding and decoding, overlaying, and windowed display of multi-station, multi-screen image and video information, thus solving the problem of image information sharing between multi-screen terminals in a distributed system.

[0009] To achieve the above objectives, the present invention provides a device for sharing image information from multiple stations in a ship system. This device includes multiple stations connected via a network to the same common switching unit, enabling information sharing and communication through the common switching unit.

[0010] Each station includes multiple channels, an internal switching unit, a configuration management unit, and a dual-redundant network management unit. Multiple channels, the configuration management unit, and the dual-redundant network management unit of the same station are simultaneously connected to the internal switching unit.

[0011] Each channel includes an HDMI interface, a screen, a video resolution detection unit, a video output interface unit, a video encoding unit, a video decoding unit, and a network video control unit. One port of the network video control unit is connected to the first input / output port of the internal switching unit, and the other port of the network video control unit is connected to both the video encoding unit and the video decoding unit. The input of the video encoding unit is connected to the output of the video resolution detection unit, the input of the video resolution detection unit is connected to the output of the HDMI interface, the output of the video decoding unit is connected to the input of the video output interface unit, and the output of the video output interface unit is connected to the screen.

[0012] Furthermore, each channel has the same structural composition.

[0013] Furthermore, each dual-redundant network management unit has at least two sets of input / output ports. One set of input / output ports is connected to the internal switching unit, and the other set of input / output ports is connected to the common switching unit. The network connected to the common switching unit is a dual-redundant network.

[0014] Furthermore, the video resolution detection unit is used for acquiring and normalizing the HDMI interface video signal. The input of the video output interface unit is connected to the output of the video decoding unit, and the output of the video output interface unit is connected to the screen display, which is the terminal display. The video output interface unit is used for processing the video display signal. The input of the video encoding unit is connected to the output of the video resolution detection unit, and the output of the video encoding unit is connected to a port of the network video control unit. The video encoding unit is responsible for encoding based on the H.264 / H.265 algorithm. The input of the video decoding unit is connected to the network video control unit, and the output of the video decoding unit is connected to the input of the video output interface unit. The video decoding unit is used to decode the video data transmitted from the network video control unit. The network video control unit has at least two ports, each with both output and input functions. One port connects to both the video decoding unit and the video encoding unit, while the other port connects to the internal switching unit. The network video control unit encapsulates the encoded data input from the video encoding unit and sends it to the internal switching unit. It also decapsulates the network-compressed video data sent from the internal switching unit into pure compressed video data and sends it to the video decoding unit. Each channel has one network video control unit, and each station has multiple channels, meaning each station has multiple network video control units. Each station has one internal switching unit with multiple interfaces. Internally, each internal switching unit connects to the network video control units of multiple channels simultaneously. Externally, it connects to the dual-redundant network management units and configuration management units of each station. The internal switching unit enables network communication between the channels within the station, the dual-redundant network management units, and the configuration management units. The configuration management unit connects to the internal switching unit on one end and to the external station motherboard on the other. It is responsible for responding to various configuration information issued by the external station motherboard and receiving status information reported by each channel of the station. The dual-redundant network management unit is connected to the internal switching unit inside the station on one end and to the external public switching unit on the other end. It is responsible for the network implementation of video information sharing services between stations.

[0015] According to a second aspect of the present invention, a method for operating a multi-unit image information sharing device for a ship system as described above is also provided, comprising a video stream pushing process and a video stream acquisition process, wherein the video stream pushing process includes the following steps:

[0016] S1, the video resolution detection unit, performs video signal acquisition and normalization, identifies the resolution and frame rate information of the incoming video, and converts it into BT1120 video format.

[0017] S2. The video encoding unit receives the BT1120 video data input in step S1 and caches the video data in its own memory. The video encoding unit performs image enhancement and sharpening processing on the cached video data, then overlays the OSD information and the video window, and finally encodes the overlaid video data using the H.264 or H.265 algorithm.

[0018] S3, the network video control unit encapsulates the encoded data using the network video protocol to conform to the RTSP protocol, thereby obtaining the network video data stream.

[0019] S4. The encapsulated network video data stream is transmitted to the dual-redundant network management unit through the internal switching unit, the internal network IP address is converted to the external network IP address, and finally the data is transmitted to the external public switching unit.

[0020] Furthermore, the process of acquiring the video stream includes the following steps:

[0021] S1. The dual-redundant network management unit receives network video data streams from the external public switching unit, converts the external IP address to the internal IP address, and then sends the data to the internal switching unit. After processing by the internal switching unit, the RTSP protocol video stream is obtained.

[0022] S2. The network video control unit receives the RTSP protocol video stream processed in step S1 and decapsulates the RTSP protocol video stream to obtain pure compressed video data.

[0023] S3. Determine the algorithm type of the purely compressed video data and identify the adaptive H264 or H265 video decoding algorithm;

[0024] S4. The video decoding unit decompresses the video data and stores the decompressed video data in its buffer pool for easy retrieval. The video decoding unit decodes multiple network video streams according to external instructions, sets parameters such as the window size, position information, and overlay order of each video stream, and then sends the video data to the video output interface unit.

[0025] S5. The video output interface unit completes the display of the video information processed in step S4.

[0026] Further, step S3 specifically involves: S3, determining the algorithm type by analyzing the NALU type of the video bitstream, thereby achieving adaptive identification of either H.264 or H.265 video decoding algorithms. Step S4 specifically involves: S4, the VDEC decoding module of the video decoding unit decompresses the video data and stores the decompressed video data in the buffer pool of the video decoding unit for easy access by the VO module of the video decoding unit.

[0027] In summary, compared with the prior art, the above-described technical solutions conceived by this invention have the following advantages:

[0028] Beneficial effects:

[0029] This invention proposes a device and method for sharing image information between any screen in any station within a multi-station, multi-screen application system in ship display and control equipment. In terms of hardware structure, multiple stations are connected to the same common switching unit via a network, enabling information sharing and interoperability. Each channel includes an HDMI interface, a screen, a video resolution detection unit, a video output interface unit, a video encoding unit, a video decoding unit, and a network video control unit. Each unit performs a corresponding function, and the units cooperate to achieve information interoperability within the station and information sharing between different stations. Ultimately, this achieves ultra-low system latency video command and dispatch functionality, providing a new approach for image sharing services between multi-screen terminals. Attached Figure Description

[0030] Figure 1 This is a schematic block diagram of a device for sharing image information between multiple stations in a ship system, provided in an embodiment of the present invention.

[0031] Figure 2 This is a flowchart of the video signal insertion / removal detection function in the device for sharing image information between multiple stations in a ship system provided in this embodiment of the invention;

[0032] Figure 3 This is a flowchart of the video encoding function in the device for sharing image information between multiple stations in a ship system provided in this embodiment of the invention;

[0033] Figure 4 This is a flowchart of the video decoding function in the device for sharing image information between multiple stations in a ship system provided in this embodiment of the invention;

[0034] Figure 5 This is a block diagram illustrating the network communication principle between stations in a device for sharing image information across multiple stations in a ship system, provided in an embodiment of the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] Figure 1 This is a schematic block diagram of a device for sharing multi-position image information in a ship system provided in an embodiment of the present invention. Figure 1 As can be seen, the entire device comprises multiple stations, each station including multiple channels. Each channel includes an HDMI interface, a screen, a video resolution detection unit, a video output interface unit, a video encoding unit, a video decoding unit, and a network video control unit. Each station also includes an internal switching unit, a configuration management unit, and a dual-redundant network management unit. Multiple channels, configuration management units, and dual-redundant network management units belonging to the same station are connected to the same internal switching unit. Different stations are connected to the same common switching unit via a network. The device of this invention enables the sharing of image and video information across multiple stations and screens.

[0037] In one embodiment of the invention, it includes two stations, each with four independent channels. Each channel has the same structural composition. Each station has four HDMI interfaces (video interface acquisition units), four video output interface units, four video encoding units, four video decoding units, four network video control units, one internal switching unit, one dual-redundant network management unit, and one configuration management unit. During encoding, the video resolution detection unit dynamically detects the video resolution and frame rate information transmitted from the HDMI interface, converts the video signal into parallel BT1120 format, and sends it to the video encoding unit. The video encoding unit encodes the received video signal according to the instructions of the configuration management unit and sends the encoded video data to the network video control unit. After encapsulation of the RTSP network video stream by the network video control unit, it sends it to the internal switching unit. The dual-redundant network management unit performs IP address remapping processing based on the port number on the encapsulated RTSP video stream, converting the internal IP addresses of each channel into normalized external IP addresses. The encoded internal network video data streams of each channel can then be accessed by other devices. During decoding, the configuration management unit receives instructions from the host computer to pull the video stream. After the video stream passes through the dual-redundant network management unit, the dual-redundant network management unit performs IP address resolution on the received external network video stream information and resolves the destination channel of the network video information according to the agreed format. The network video control unit performs protocol offloading on the received network video stream information and sends the pure video data to the video decoding unit for decoding. The video decoding unit restores the video according to the resolved original video resolution and frame rate information and sends it to the video output interface unit. After processing by the video output interface unit, it is sent to the screen for display according to the standard video format.

[0038] In another embodiment of the present invention, each dual-redundant network management unit has at least two sets of input / output ports. One set of input / output ports is connected to the internal switching unit, and the other set of input / output ports is connected to the common switching unit. The network connected to the common switching unit is a dual-redundant network.

[0039] The following section provides a more detailed description of the specific functions of each unit.

[0040] (1) HDMI interface and video resolution detection unit

[0041] The input of the video resolution detection unit is connected to an HDMI interface. The HDMI interface is used to normalize the video signal interface format, converting it into a video input format that the video codec unit can recognize. The video resolution detection unit is responsible for video signal acquisition and normalization. In this embodiment, the HDMI interface uses the GSV2011 video interface processing chip to convert the serial differential HDMI interface into a parallel single-ended video signal BT1120. This signal needs to be re-encapsulated in a new frame format. The frame format conforms to the data structure specified by ITU-R (International Telecommunication Union Radiocommunication Sector). In this embodiment, taking a 1920*1080 resolution video signal as an example, the encapsulated data format is shown in Table 1 below:

[0042] Table 1. Encapsulated data format

[0043]

[0044] The EAV and SAV characters are as shown in Table 2 below:

[0045] Table 2 shows the EAV and SAV characters based on...

[0046] 1～81,2242～2250 B6B6 ABAB 82～2241 9D9D 8080

[0047] The video resolution detection unit contains a SignalDetect module thread. This thread continuously queries the status of the video resolution receiver register, performs corresponding register configuration processing for front-end input signals or plug-in / plug-out actions, and reads the specific video signal resolution timing after the horizontal and vertical registers stabilize, thereby achieving the detection function of signal plug-in / plug-out and input status.

[0048] Figure 2 This is a flowchart of the video signal insertion / removal detection function in the device for sharing image information across multiple stations in a ship system provided in this embodiment of the invention. As shown in the figure, during operation, the video resolution detection unit queries and detects the status of the video resolution receiver register, performs corresponding register configuration processing for the front-end input signal or insertion / removal action, and reads and saves the specific video signal resolution timing after the horizontal and vertical registers stabilize. Then, it notifies other modules, thereby achieving the detection function of signal insertion / removal and input status.

[0049] (2) Video output interface unit

[0050] The input of the video output interface unit is connected to the output of the video decoding unit, and its output is connected to the terminal display screen, responsible for processing the video display signal. The video output interface unit can select the source of the video output signal according to the instructions issued by the configuration management unit. In this embodiment, the video output interface unit uses the native HDMI output interface of the Hisilicon Hi3531D chip. There are three sources of video output signal: one is to directly send the video from the video input interface to the video output interface unit for display, where the resolution, frame rate, and image information of the output video are consistent with the original information of the video input; another is to combine the video from the video input interface with the video decoded by the decoding unit and then display it in a window, where the resolution, frame rate, and image information of the combined video output can be set according to the configuration management unit; and the third is to directly combine multiple videos decoded by the decoding unit and then display them in a window, where the resolution, frame rate, and image information of the decoded video output can be set according to the configuration management unit. The video output interface unit can manage the output video resolution, output window size, number of output windows, and output window stacking relationship according to the instructions of the configuration management unit.

[0051] (3) Video coding unit

[0052] The input of the video encoding unit is connected to the output of the video resolution detection unit, and its output is connected to the network video control unit, responsible for encoding functions based on the H.264 / H.265 algorithm. In this embodiment, the video encoding unit uses the Hisilicon Hi3531D dedicated video codec chip, and completes the encoding function through various SDK interfaces provided by the Hisilicon media processing software platform. Its implementation process is as follows: Figure 3 The steps are as follows:

[0053] S1. First, the video encoding unit receives the video signal sent by the video resolution detection unit. The video encoding unit is equipped with a VI module, which captures video images. The VI module supports two parallel BT1120 video input modes: SDR and DDR.

[0054] The S2 and VI modules perform processing such as cropping and noise reduction on the captured video images and output multiple video images of different resolutions.

[0055] S3. The video encoding unit is also equipped with a VPSS module. The VPSS module receives the video images sent by the VI module, performs image enhancement, sharpening and other processing on the video, and realizes the same source output of multiple video data with different resolutions, so that it can be used for encoding, preview or snapshot.

[0056] S4. The video encoding unit is also equipped with an encoding module. The encoding module receives the video data processed by the VPSS module and overlays the OSD information set by the user, or overlays the decoded video data.

[0057] S5. According to the configuration requirements of the configuration management unit, encode the acquired pure VI module output video data, or the data obtained by superimposing the VI module output video data with the decoded network video data, into H264 or H265.

[0058] (4) Video decoding unit

[0059] The video decoding unit's input is connected to the network video control unit, and its output is connected to the input of the video output interface unit. Its function is to decode the video data sent from the network video control unit. In this embodiment, the video data input to the network control unit is pure compressed data after decompressing the RTSP protocol video stream; it may be H.264 compressed data or H.265 compressed data. The video decoding unit can determine the data type by analyzing the NALU type of the video stream. Simultaneously, the SPS frames in the video stream contain signal resolution information. Therefore, after obtaining this information, the previous decoding algorithm can be destroyed and a corresponding decoding algorithm can be created, thereby achieving adaptive video encoding algorithm recognition. The video decoding unit includes a VDEC decoding module to decompress the video data and store the decompressed video data in a buffer pool for easy access by the video decoding unit's VO module. The video decoding unit can decode multiple network video streams according to instructions from the host computer and set parameters such as the window size, position information, and overlay order of each video stream according to the instructions. The video decoding function flowchart is as follows. Figure 4 As shown, Figure 4 This is a flowchart of the video decoding function in the device for sharing multi-position image information in a ship system provided in this embodiment of the invention. Figure 4 It can be seen that the compressed video data may be H264 compressed data or H265 compressed data. First, the H264 algorithm or H265 algorithm is parsed, then the resolution and frame rate are parsed, and then VDEC decoding is performed. The decompressed video data is stored in the buffer pool so that the VO module of the video decoding unit can call the cache.

[0060] (5) Network video control unit

[0061] The network video control unit is connected to the encoding unit, decoding unit, and internal switching unit. It is used to encapsulate the encoded data from the video encoding unit and then send it to the internal switching unit; or to decapsulate the network compressed video data input to the internal switching unit into pure compressed video data and then send it to the video decoding unit. In this embodiment, each network video control unit is completely independent and operates in parallel with each other, allowing them to acquire video streams from each other and enabling video sharing services across multiple channels.

[0062] (6) Internal switching unit

[0063] The internal switching unit connects internally to each network video control unit, and externally to the dual-redundant network management unit and configuration management unit. The internal switching unit enables network information exchange between the various channels within this station, the dual-redundant network management unit, and the configuration management unit.

[0064] (7) Configuration Management Unit

[0065] The configuration management unit connects to the internal switching unit on one end and to the external platform motherboard on the other. Its main function is to respond to various configuration information issued by the platform motherboard and to receive status information reported by each channel of the platform. The motherboard information received by the configuration management unit is internal platform configuration information and is communicated only between channels within the platform, without being forwarded through the dual-redundant network management unit, ensuring that communication occurs only between channels within the platform.

[0066] (8) Dual Redundant Network Management Unit

[0067] The dual-redundant network management unit connects to the internal switching unit within each workstation on one end and to a public switch unit on the other, responsible for the network implementation of video information sharing services between workstations. In this embodiment, a multi-workstation image information sharing device has multiple workstations, each with multiple channel information; each workstation has only one external IP address, but internally it has multiple IP addresses. The function of the dual-redundant network management unit is to convert multiple internal IP addresses into a single external IP address, thereby enabling network video stream information sharing between workstations. The following diagram illustrates the network connection relationship between two workstations. Workstation 1 and workstation 2 are connected, each with multiple internal IP addresses and only one external IP address. Externally, it forms a dual-redundant network with the same IP address and MAC address. Only one network is in normal operation at any given time; when the other network fails, it switches to the backup network to enhance network reliability. Any IP address within station 1 can access any IP address within station 2, and any IP address within station 2 can also access any IP address within station 1, thus enabling mutual access between IP addresses within each station. The network information sharing principle diagram between stations is as follows: Figure 5 As shown, Figure 5 This is a block diagram illustrating the network communication principle between stations in the multi-station image information sharing device for a ship system provided in this embodiment of the invention. Figure 5 It is known that each station is equipped with a dual-redundant network management unit, and each dual-redundant network management unit is equipped with an internal IP module and an external IP module. The external IP module enables information exchange between different stations through the network, while the internal IP module is used to enable information exchange between internal channels.

[0068] The present invention also proposes a method for sharing multi-position image information in a ship system using the device described in the first aspect of the present invention. The method is divided into pushing video streams and acquiring video streams. The process of pushing video streams includes the following steps:

[0069] S1, the video resolution detection unit, is responsible for acquiring and normalizing video signals, identifying the resolution and frame rate information of the incoming video, and converting it into BT1120 video format.

[0070] S2. The video encoding unit receives the BT1120 video data input in step S1 and caches the video data in its own memory. The video encoding unit performs image enhancement and sharpening processing on the cached video data, then overlays the OSD information and the video window, and finally encodes the overlaid video data using the H.264 or H.265 algorithm.

[0071] S3, the network video control unit, performs network encapsulation on the encoded data to conform to the RTSP protocol, thereby obtaining the network video data stream.

[0072] S4. The encapsulated network data is transmitted to the dual-redundant network management unit via the internal switching unit, the internal network IP address is converted to the external network IP address, and finally the data is transmitted to the external public switching unit.

[0073] The process of acquiring a video stream includes the following steps:

[0074] S1. The dual-redundant network management unit receives network video data from the external public switching unit, converts the external IP address to the internal IP address through IP address translation, and then sends the data to the internal switching unit. After processing by the internal switching unit, the RTSP protocol video stream is obtained.

[0075] S2. The network video control unit receives the RTSP protocol video stream processed in step S1 and decapsulates the RTSP protocol video stream to obtain pure compressed video data.

[0076] S3. By determining the algorithm type based on the NALU type of the video bitstream, the adaptive H264 or H265 video decoding algorithm can be identified.

[0077] S4. The VDEC decoding module of the video decoding unit decompresses the video data and stores the decompressed video data in the buffer pool of the video decoding unit for easy access by the VO module.

[0078] S5. The video decoding unit decodes multiple network video streams according to instructions from the host computer, sets parameters such as the window size, position information, and overlay order of each video stream, and then transmits the video data to the video output interface unit.

[0079] S6. The video output interface unit completes the display of the video information processed in step S5.

[0080] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for sharing multi-position image information in a ship system, characterized in that, It comprises multiple stations, which are connected to the same common switching unit via a network, enabling information sharing and communication through the common switching unit. Each station includes multiple channels, an internal switching unit, a configuration management unit, and a dual-redundant network management unit. Multiple channels, the configuration management unit, and the dual-redundant network management unit of the same station are simultaneously connected to the internal switching unit. Each channel includes an HDMI interface, a screen, a video resolution detection unit, a video output interface unit, a video encoding unit, a video decoding unit, and a network video control unit. One port of the network video control unit is connected to the first input / output port of the internal switching unit, and the other port is connected to both the video encoding unit and the video decoding unit. The input of the video encoding unit is connected to the output of the video resolution detection unit, which is also connected to the output of the HDMI interface. The output of the video decoding unit is connected to the input of the video output interface unit, and the output of the video output interface unit is connected to the screen. Each station has multiple internal IP addresses, but only one external IP address. Each dual-redundant network management unit is configured with an internal IP module and an external IP module. The external IP module enables information exchange between different stations through the network, while the internal IP module enables information exchange between internal channels. The function of the dual-redundant network management unit is to convert multiple internal IP addresses into the same external IP address.

2. The device for sharing multi-position image information in a ship system as described in claim 1, characterized in that, Each channel has the same structural composition.

3. The device for sharing multi-position image information in a ship system as described in claim 1, characterized in that, Each dual-redundant network management unit has at least two sets of input / output ports. One set of input / output ports is connected to the internal switching unit, and the other set of input / output ports is connected to the common switching unit. The network connected to the common switching unit is a dual-redundant network.

4. The device for sharing multi-position image information in a ship system as described in claim 1, characterized in that, It includes N stations, and the number of channels in each station can be configured as needed.

5. A device for sharing multi-position image information in a ship system as described in any one of claims 1-4, characterized in that, The video resolution detection unit is used for video signal acquisition and video signal normalization. The video output interface unit is used for processing video display signals. The video coding unit is used for coding functions based on the H.264 / H.265 algorithm. The video decoding unit is used to decode the video data input from the network video control unit. The network video control unit encapsulates the encoded data input from the video encoding unit into a network video stream, and then transmits it to the internal switching unit. The network video control unit encapsulates the encoded data input from the video encoding unit using the network video protocol and then sends it to the internal switching unit; simultaneously, it offloads the network video protocol data input from the internal switching unit and then sends it to the video decoding unit. The configuration management unit is responsible for responding to various configuration information issued by the motherboards of each station, and also for receiving status information reported by each channel of the station. The dual-redundant network management unit is responsible for the network implementation of video information sharing services between various stations.

6. The operating method of a multi-position image information sharing device for a ship system as described in any one of claims 1-5, characterized in that, It includes the process of pushing a video stream and the process of acquiring a video stream. The process of pushing a video stream includes the following steps: S1, the video resolution detection unit, performs video signal acquisition and normalization, identifies the resolution and frame rate information of the incoming video, and converts it into BT1120 video format. S2. The video encoding unit receives the BT1120 video data input in step S1 and caches the video data in its own memory. The video encoding unit performs image enhancement and sharpening processing on the cached video data, then overlays the OSD information and the video window, and finally encodes the overlaid video data using the H.264 or H.265 algorithm. S3, the network video control unit encapsulates the encoded data using the network video protocol to conform to the RTSP protocol, thereby obtaining the network video data stream. S4. The encapsulated network video data stream is transmitted to the dual-redundant network management unit through the internal switching unit, the internal network IP address is converted to the external network IP address, and finally the data is transmitted to the external public switching unit.

7. The working method as described in claim 6, characterized in that, The process of acquiring a video stream includes the following steps: S1. The dual-redundant network management unit receives network video data streams from the external public switching unit, converts the external IP address to the internal IP address, and then sends the data to the internal switching unit. After processing by the internal switching unit, the RTSP protocol video stream is obtained. S2. The network video control unit receives the RTSP protocol video stream processed in step S1 and decapsulates the RTSP protocol video stream to obtain pure compressed video data. S3. Determine the algorithm type of the purely compressed video data and identify the adaptive H264 or H265 video decoding algorithm; S4. The video decoding unit decompresses the video data and stores the decompressed video data in its buffer pool for easy retrieval. The video decoding unit decodes multiple network video streams according to external instructions, sets parameters such as the window size, position information, and overlay order of each video stream, and then sends the video data to the video output interface unit. S5. The video output interface unit completes the display of the video information processed in step S4.

8. The working method as described in claim 7, characterized in that, Step S3 specifically involves: S3, determining the algorithm type by analyzing the NALU type of the video bitstream, thereby enabling the identification of adaptive H264 or H265 video decoding algorithms; Step S4 specifically involves: S4, the VDEC decoding module of the video decoding unit decompresses the video data and stores the decompressed video data in the buffer pool of the video decoding unit for easy access by the VO module of the video decoding unit.

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