Large-scale video display and control matrix equipment based on channel multiplexing technology

Abstract

The present invention belongs to the field of video display and control technology, specifically relating to a large-scale video display and control matrix device based on channel multiplexing technology. This device aims to address the existing inability to achieve large-scale multi-channel video interconnection and switching. The present invention comprises: one or more input modules, each of which acquires N channels of video, replicates and multiplexes the videos, divides them into M×N groups, and sends them to a switching unit; the switching unit comprises at least one switching card, which acquires video groups and sends them to corresponding output modules based on a first user instruction; and one or more output modules, each of which extracts any video channel from the video group based on a second user instruction and outputs it through a corresponding video interface chip. Each video input and output port of the present invention can transmit multiple video services. The maximum scale of the device is not limited by the number of chip interfaces, and it can meet the user's multi-channel video interconnection and switching needs in large-scale scenarios.

Description

Technical Field

[0001] The present invention belongs to the technical field of video display and control, and in particular relates to a large-scale video display and control matrix device based on channel multiplexing technology. Background Art

[0002] Video display and control equipment primarily consists of a video matrix and a splicing processor. A video matrix is ​​an electronic device that uses an array switching method to arbitrarily output m-channel video signals to n-channel monitoring devices. Some video matrices also have an audio switching function, which can synchronously switch video and audio signals. This type of matrix is ​​also called an audio-visual matrix. Current video matrices are divided into two categories based on their implementation methods: analog matrices and digital matrices. Video matrices are generally used in various monitoring scenarios. A video splicing controller is a professional video processing and control device. Its main function is to split a video signal into multiple display units, output the split display unit signals to multiple display terminals, and complete the splicing of multiple display screens to form a complete image. The processing process is completely hardware-based, and the video display process does not require a computer or startup software, making it very simple.

[0003] Existing video display and control devices use a crosspoint chip to implement backplane interconnection and switching for video services. Each crosspoint input port connects to one video input channel, and each output port connects to one video output channel. By configuring the chip's internal input-output connections, functions such as video service switching and output replication are implemented. Each crosspoint input and output port can only transmit one video service, limiting the maximum device size to the number of chip interfaces. The current device size is no longer sufficient to meet user needs, and a larger-scale device is urgently needed to achieve multi-channel video interconnection and switching. Summary of the Invention

[0004] In order to solve the above-mentioned problem in the prior art, namely, the problem that the prior art cannot realize large-scale multi-channel video interconnection and switching, the present invention provides a large-scale video display and control matrix device based on channel multiplexing technology, including a backplane, a power module, a main control module, a bellows, and a chassis. The video display and control matrix device also includes one or more input modules, a switching unit, and one or more output modules;

[0005] The input module is used to obtain N channels of video and copy each of the N channels of video into N copies, reassemble the N copies of N videos into N video groups, perform channel multiplexing, and then send them to the switching unit;

[0006] The switching unit respectively obtains N video groups sent by one or more input modules, and sends each video group to a corresponding output module of the one or more output modules based on the obtained first user instruction;

[0007] The output module is used to obtain the video group sent by the switching unit, and extract and output any one video in the video group based on the obtained second user instruction.

[0008] In some preferred embodiments, the method of “recombining N copies of N videos into N video groups” is as follows:

[0009] The videos from different first video interface chips in the N videos are grouped together to obtain N video groups.

[0010] In some preferred embodiments, the input module is provided with N first video interface chips and N first backplane high-speed channels; the first video interface chip is used to obtain one channel of video; the first backplane high-speed channel is used to output a reassembled video group.

[0011] In some preferred embodiments, the switching unit includes one or more switching cards; the switching unit is provided with H video input channels and H video output channels.

[0012] In some preferred embodiments, the output module is provided with C second backplane high-speed channels and C second video interface chips; the second backplane high-speed channels are used to obtain a video group; the second video interface chip is used to output any video extracted based on the second user instruction.

[0013] In some preferred embodiments, the switching unit is further provided with a first micro control unit;

[0014] The first micro control unit is used to obtain a first user instruction sent by the main control module, and match the M video output interfaces of the switching unit with the second backplane high-speed channels of the C output modules based on the first user instruction.

[0015] In some preferred embodiments, the output module is further provided with a second micro control unit;

[0016] The second micro control unit is used to obtain a second user instruction sent by the main control module, and extract any one video channel in a video group of each second backplane high-speed channel of each output module based on the second user instruction.

[0017] In some preferred embodiments, video transmission is performed through one of FPGA, DSP, and ASIC chips as a backplane high-speed channel.

[0018] Beneficial effects of the present invention:

[0019] The present invention is a large-scale video display and control matrix device based on channel multiplexing technology. Through video replication and reorganization, channel multiplexing, and video extraction technologies, each video input and output port can transmit multiple video services. The maximum scale of the device is not limited by the number of chip interfaces, which greatly expands the device scale, improves device integration, reduces the average port cost and average function, and can meet the user's application needs in larger-scale scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 This is a schematic diagram of the framework of a large-scale video display and control matrix device based on channel multiplexing technology of the present invention;

[0022] Figure 2 This is a schematic diagram of a 320-320 channel video switching device framework of an embodiment of a large-scale video display and control matrix device based on channel multiplexing technology of the present invention;

[0023] Figure 3 This is a schematic diagram of a 2-way input module framework of an embodiment of a large-scale video display and control matrix device based on channel multiplexing technology of the present invention;

[0024] Figure 4 This is a schematic diagram of a 160-160 channel video switching card framework of an embodiment of a large-scale video display and control matrix device based on channel multiplexing technology of the present invention;

[0025] Figure 5 This is a schematic diagram of a 2-way output module framework of an embodiment of a large-scale video display and control matrix device based on channel multiplexing technology of the present invention. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the relevant invention are shown in the accompanying drawings.

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] The present invention discloses a large-scale video display and control matrix device based on channel multiplexing technology, including a backplane, a power module, a main control module, a bellows, and a chassis. The video display and control matrix device also includes one or more input modules, a switching unit, and one or more output modules.

[0029] The input module is used to obtain N channels of video and copy each of the N channels of video into N copies, reassemble the N copies of N videos into N video groups, perform channel multiplexing, and then send them to the switching unit;

[0030] The switching unit respectively obtains N video groups sent by one or more input modules, and sends each video group to a corresponding output module of the one or more output modules based on the obtained first user instruction;

[0031] The output module is used to obtain the video group sent by the switching unit, and extract and output any one video in the video group based on the obtained second user instruction.

[0032] In order to more clearly explain the large-scale video display and control matrix device based on the channel multiplexing technology of the present invention, the following Figure 1 Each module in the embodiment of the present invention is described in detail.

[0033] A large-scale video display and control matrix device based on channel multiplexing technology according to an embodiment of the present invention includes a backplane, a power module, a main control module, a bellows, and a chassis. The video display and control matrix device also includes one or more input modules, a switching unit, and one or more output modules. Each module is described in detail as follows:

[0034] The input module is used to obtain N channels of video and copy each of the N channels of video into N copies, reassemble the N copies of N videos into N video groups, perform channel multiplexing, and then send them to the switching unit.

[0035] The input module is equipped with N first video interface chips and N first backplane high-speed channels. Each first video interface chip is used to acquire a video channel, and each first backplane high-speed channel is used to output a recombined video group. The input module supports N video inputs and N video group outputs.

[0036] Each of the N input video channels is copied into N copies, and the videos from different first video interface chips are grouped together to obtain N video groups, each video group including N videos from the N first video interface chips.

[0037] In order to more clearly illustrate the input module, the present invention uses M input modules supporting N-channel videos for illustration. In actual applications, one or more input modules can be placed in the device, such as a 2-channel card, a 4-channel card, or an 8-channel card.

[0038] The switching unit respectively obtains N video groups sent by one or more input modules, and sends each video group to a corresponding output module of the one or more output modules based on the obtained first user instruction.

[0039] The switching unit includes one or more switching cards, which are equipped with H video input channels and H video output channels, and is used to obtain M×N video groups sent by M input modules, and send each video group in the M×N video groups to the corresponding output module in one or more output modules based on the first user instruction obtained.

[0040] The output module is provided with C second backplane high-speed channels and C second video interface chips. Each second backplane high-speed channel obtains a video group sent by the switch card group, and each second video interface chip outputs any one of the obtained videos.

[0041] In order to more clearly illustrate the output module, the present invention uses Q output modules supporting C-channel video for illustration. In actual applications, one or more output modules can be placed in the device, such as a 2-channel card, a 4-channel card, or an 8-channel card.

[0042] The switching unit is also provided with a first micro control unit for obtaining a first user instruction sent by the main control module, and matching the M video output interfaces of the switching unit with the second backplane high-speed channels of the C output modules based on the first user instruction.

[0043] The output module is also provided with a second micro control unit for obtaining a second user instruction sent by the main control module and extracting any one video from a video group of each second backplane high-speed channel of each output module based on the second user instruction.

[0044] Because the input data switched by each switching unit contains all the input video information, each output module can inevitably obtain N channels of arbitrary input video from N backplane channels. Therefore, the entire device's M×N inputs to Q×C outputs are completely unobstructed, meeting the needs of video display and control equipment, and realizing the expansion of the switching scale from H inputs and H outputs to (M×N) inputs and (Q×C) outputs, expanding the number of traditional device ports. Video switching is not restricted by the number of device ports, and can achieve large-scale multi-channel video interconnection and switching.

[0045] like Figure 2 The figure shows a schematic diagram of the framework of a 320-320-channel video switching device according to an embodiment of a large-scale video display and control matrix device based on channel multiplexing technology of the present invention, which includes 160 input modules, 2 switching cards, and 160 output modules. Each input module supports 2 video inputs and 2 backplane high-speed outputs, each switching card supports video switching functions for 160 video inputs and 160 video outputs, the switching unit supports video switching functions for 320 video inputs and 320 video outputs, and each output module supports 2 backplane high-speed inputs and 2 video outputs.

[0046] First, the input videos of input module 1 are recorded as 11 and 12, the input videos of input module 2 are recorded as 21 and 22, ..., and the input videos of input module 160 are recorded as 1601 and 1602. The videos of each input module are copied and regrouped to obtain 160×2 groups of videos, each group of videos includes (11, 12), (11, 12) (21, 22) (21, 22), ..., (1601, 1602) (1601, 1602).

[0047] Then, the two 160-160 switching cards perform channel matching according to the first user instruction and send each video group to the high-speed input channel of the corresponding output module. In this embodiment, channel 1 of output module 1 obtains video group (11, 12), and channel 2 obtains video group (801, 802); channel 1 of output module 2 obtains video group (801, 802), and channel 2 obtains video group (11, 12); channel 1 of output module 160 obtains video group (41, 42), and channel 2 obtains video group (1201, 1202); ..., and the video groups obtained by other output modules will not be detailed one by one.

[0048] Finally, video extraction is performed according to the second user instruction. The two channels of output module 1 display video 11 and video 802 respectively; the two channels of output module 2 display video 801 and video 12 respectively; the two channels of output module 160 display video 42 and video 1201 respectively; ..., the videos output by other output modules are no longer described in detail.

[0049] like Figure 3 The figure shows a schematic diagram of the two-way input module framework for one embodiment of a large-scale video display and control matrix device based on channel multiplexing technology according to the present invention. The module primarily comprises an input video interface chip and an FPGA. The video interface chip is responsible for accessing various video interface formats (such as HDMI, DVI, VGA, SDI, DP, etc.), converting them into a unified on-board video interface (RGB, BT1120, LVDS, etc.), and then connecting them to the FPGA. The FPGA uses channel multiplexing technology to combine all videos into a single transmission channel. On the backplane transmission side, the channel is replicated and sent to two backplane channels. This embodiment uses an FPGA for video processing. Other embodiments may also use other chips, such as DSPs and ASICs. This invention will not be described in detail here.

[0050] like Figure 4Figure 2 shows a schematic diagram of the 160-160 channel video switching card framework for one embodiment of a large-scale video display and control matrix device based on channel multiplexing technology according to the present invention. The card includes a switching chip supporting 160 video inputs and 160 video outputs, and a first microprocessor unit (MCU) that configures the chip. The MCU is responsible for forwarding switching commands from the main control module and configuring the switching chip. Based on the configuration, the switching chip switches the designated multiplexed input video channel to the designated output channel. This embodiment uses the MCU for command forwarding and chip configuration. Other embodiments may also use other chips with similar functions, which will not be described in detail here.

[0051] like Figure 5 Figure 2 shows a schematic diagram of the two-channel output module framework for one embodiment of a large-scale video display and control matrix device based on channel multiplexing technology according to the present invention. The module primarily comprises a second microprocessor unit (MCU), an output video interface chip, and an FPGA. The MCU receives output channel configuration instructions from the main control module, converts these instructions into corresponding register settings for the FPGA, and then sets them into the FPGA. The FPGA first caches the video in local memory and then, based on the settings, extracts the corresponding video data for output. This data is then sent to the video output interface chip via the on-board video interface for output to an external display device. This embodiment utilizes an FPGA for video processing and an MCU for command reception, conversion, and video output interface configuration. Other embodiments may employ other chips with similar functions, which will not be detailed here.

[0052] It should be noted that the large-scale video display and control matrix device based on channel multiplexing technology provided in the above embodiments is merely illustrated by the division of the above-mentioned functional modules. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the modules in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above-mentioned embodiments can be combined into a single module or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules involved in the embodiments of the present invention are merely for distinguishing the modules and are not to be considered as undue limitations of the present invention.

[0053] The terms "first", "second", etc. are used to distinguish similar objects, rather than to describe or indicate a particular order or sequence.

[0054] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0055] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A large-scale video display and control matrix device based on channel multiplexing technology, comprising a backplane, a power module, a main control module, a bellows and a chassis, characterized in that: The video display and control matrix device also includes one or more input modules, a switching unit and one or more output modules; Each of the one or more input modules is provided with N first video interface chips for acquiring one channel of video and N first backplane high-speed channels for outputting a recombined video group, and is configured to acquire N channels of video and copy each of the N channels of video into N copies, recombining the N copies of N videos into N video groups, performing channel multiplexing, and then sending them to the switching unit, wherein videos from different first video interface chips in the N copies of N videos are grouped together to obtain N video groups; The switching unit respectively obtains N video groups sent by one or more input modules, and sends each video group to a corresponding output module of the one or more output modules based on the obtained first user instruction; Each of the one or more output modules is provided with C second backplane high-speed channels for acquiring a video group and C second video interface chips for outputting any one video extracted based on a second user instruction, and is used to acquire the video group sent by the switching unit, and extract and output any one video in the video group based on the acquired second user instruction.

2. The large-scale video display and control matrix device based on channel multiplexing technology according to claim 1, characterized in that: The switching unit includes one or more switching cards; the switching unit is provided with H video input channels and H video output channels.

3. The large-scale video display and control matrix device based on channel multiplexing technology according to claim 2, characterized in that: The switching unit is further provided with a first micro control unit; The first micro control unit is used to obtain a first user instruction sent by the main control module, and match the M video output interfaces of the switching unit with the C second backplane high-speed channels of the output module based on the first user instruction.

4. The large-scale video display and control matrix device based on channel multiplexing technology according to claim 2, characterized in that: The output module is also provided with a second micro control unit; The second micro control unit is used to obtain a second user instruction sent by the main control module, and extract any one video channel in a video group of each second backplane high-speed channel of each output module based on the second user instruction.

5. The large-scale video display and control matrix device based on channel multiplexing technology according to claim 1, characterized in that: Video transmission is performed through one of the FPGA, DSP, and ASIC chips as a backplane high-speed channel.

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