CN110784664A - Large-scale video display control matrix equipment based on channel multiplexing technology - Google Patents
Large-scale video display control matrix equipment based on channel multiplexing technology Download PDFInfo
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- CN110784664A CN110784664A CN201911291616.8A CN201911291616A CN110784664A CN 110784664 A CN110784664 A CN 110784664A CN 201911291616 A CN201911291616 A CN 201911291616A CN 110784664 A CN110784664 A CN 110784664A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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Abstract
The invention belongs to the technical field of video display and control, particularly relates to large-scale video display and control matrix equipment based on a channel multiplexing technology, and aims to solve the problem that large-scale multi-channel video interconnection switching cannot be realized in the prior art. The invention comprises the following steps: each input module acquires N paths of videos, performs video copying and multiplexing, divides the videos into M multiplied by N groups and sends the groups to the switching unit; the switching unit comprises at least one switching card, acquires the video groups and respectively sends the video groups to corresponding output modules based on the first user instruction; and each output module extracts any one path of video in the video group based on the second user instruction and outputs the video through a corresponding video interface chip. Each path of video input/output port can transmit multi-path video services, the maximum scale of the equipment is not limited by the number of the interfaces of the chip, and the requirement of multi-path video interconnection switching of large-scale scenes of users can be met.
Description
Technical Field
The invention belongs to the technical field of video display and control, and particularly relates to large-scale video display and control matrix equipment based on a channel multiplexing technology.
Background
The video display and control equipment mainly comprises a video matrix and a splicing processor. The video matrix refers to an electronic device which outputs m paths of video signals to n paths of monitoring equipment randomly by an array switching method. There are some video matrices, also known as audio-visual matrices, which have audio switching capability and are capable of switching video and audio signals synchronously. The current video matrix has two main categories, analog matrix and digital matrix, in terms of its realization method. Video matrices are commonly used in various monitoring applications. The video splicing controller is professional video processing and control equipment, and has the main functions of dividing a video signal into a plurality of display units, outputting the divided display unit signals to a plurality of display terminals, and completing splicing a plurality of display screens to form a complete image.
In the existing video display control device, the interconnection switching of the video service backplane side is realized by a crosspoint chip, each input port of the crosspoint is connected with one input video, each output port of the crosspoint is connected with one output video, and the functions of switching connection and copying output of the video service are realized by configuring the connection relationship from input to output in the chip. Each input/output port of the crosspoint can only transmit one path of video traffic, which results in the maximum size of the device being limited by the number of interfaces of the chip. At present, the scale of the equipment can not meet the requirements of users, and a larger-scale equipment is urgently needed to realize the interconnection switching of multiple paths of videos.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, the prior art cannot realize large-scale multi-channel video interconnection switching, the invention provides a large-scale video display and control matrix device based on a channel multiplexing technology, which comprises a back panel, a power supply module, a main control module, a bellows and a chassis, and the video display and control matrix device further comprises one or more input modules, a switching unit and one or more output modules;
the input module is used for acquiring N paths of videos, copying each path of video in the N paths of videos into N parts, recombining the N parts of videos into N video groups, multiplexing channels and then sending the N video groups to the switching unit;
the switching unit respectively acquires N video groups sent by one or more input modules, and respectively sends each video group to a corresponding output module in one or more output modules based on an acquired first user instruction;
the output module is used for acquiring the video group sent by the switching unit, extracting any path of video in the video group based on the acquired second user instruction and outputting the video.
In some preferred embodiments, "recombining N parts of N videos into N video groups" comprises:
and taking the videos from different first video interface chips in the N parts of N videos as a group to obtain N video groups.
In some preferred embodiments, the input module is provided with N first video interface chips, N first backplane high-speed channels; the first video interface chip is used for acquiring a video; the first backplane high speed channel is for outputting a video set after being recombined.
In some preferred embodiments, the switching unit comprises one or more switch cards; the switching unit is provided with H video input channels and H video output channels.
In some preferred embodiments, the output module is provided with C second backplane high-speed channels, C second video interface chips; the second backboard high-speed channel is used for acquiring a video group; the second video interface chip is used for outputting any path of video extracted based on a second user instruction.
In some preferred embodiments, the switching unit is further provided with a first micro control unit;
the first micro control unit is used for acquiring a first user instruction sent by a main control module and matching the M video output interfaces of the switching unit with the second backboard high-speed channels of the C output modules based on the first user instruction.
In some preferred embodiments, the output module is further provided with a second micro control unit;
the second micro control unit is used for acquiring a second user instruction sent by the main control module and extracting any one path of video in a video group of each second backboard high-speed channel of each output module based on the second user instruction.
In some preferred embodiments, one of the FPGA, DSP and ASIC chips is used as a backboard high-speed channel for video transmission.
The invention has the beneficial effects that:
according to the large-scale video display control matrix equipment based on the channel multiplexing technology, each video input/output port can transmit multiple paths of video services through the video copying recombination, the channel multiplexing and the video extraction technologies, the maximum scale of the equipment is not limited by the number of the interfaces of a chip, the large expansion of the equipment scale is realized, the equipment integration level is improved, the average cost and the average function of the ports are reduced, and the application requirements of a user on a larger-scale scene can be met.
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Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a framework of a large-scale video display control matrix device based on a channel multiplexing technology according to the present invention;
fig. 2 is a schematic diagram of a 320-channel video switching device framework according to an embodiment of the large-scale video display control matrix device based on the channel multiplexing technology;
FIG. 3 is a schematic diagram of a 2-way input module framework according to an embodiment of the large-scale video display control matrix device based on the channel multiplexing technology;
fig. 4 is a frame diagram of a 160-channel video switching card according to an embodiment of the large-scale video display control matrix device based on the channel multiplexing technology;
fig. 5 is a schematic diagram of a 2-channel output module framework of an embodiment of a large-scale video display control matrix device based on a channel multiplexing technology.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention relates to large-scale video display control matrix equipment based on a channel multiplexing technology, which comprises a back plate, a power supply module, a main control module, an air box and a case, and further comprises one or more input modules, a switching unit and one or more output modules
The input module is used for acquiring N paths of videos, copying each path of video in the N paths of videos into N parts, recombining the N parts of videos into N video groups, multiplexing channels and then sending the N video groups to the switching unit;
the switching unit respectively acquires N video groups sent by one or more input modules, and respectively sends each video group to a corresponding output module in one or more output modules based on an acquired first user instruction;
the output module is used for acquiring the video group sent by the switching unit, extracting any path of video in the video group based on the acquired second user instruction and outputting the video.
In order to more clearly describe the large-scale video display control matrix device based on the channel multiplexing technology, details of each module in the embodiment of the present invention are expanded with reference to fig. 1.
The large-scale video display control matrix equipment based on the channel multiplexing technology comprises a back plate, a power supply module, a main control module, an air box and a case, and further comprises one or more input modules, a switching unit and one or more output modules, wherein the modules are described in detail as follows:
the input module is used for acquiring N paths of videos, copying each path of video in the N paths of videos into N parts, recombining the N parts of videos into N video groups, multiplexing channels and then sending the N video groups to the switching unit.
The input module is provided with N first video interface chips and N first backboard high-speed channels. Each first video interface chip is used for acquiring a path of video, and each first backboard high-speed channel is used for outputting a video group after recombination. The input module supports N video inputs and N video group outputs.
Each path of video in the input N paths of videos is copied into N parts, and the videos from different first video interface chips are used as a group to obtain N video groups, wherein each video group comprises N videos from the N first video interface chips.
In order to explain the input module more clearly, the invention explains by M input modules supporting N paths of videos, and in practical application, one or more input modules can be placed in the equipment, such as 2 paths of one card, 4 paths of one card and 8 paths of one card.
The switching unit respectively acquires the N video groups sent by the one or more input modules, and respectively sends each video group to a corresponding output module in the one or more output modules based on the acquired first user instruction.
The switching unit comprises one or more switching cards, wherein the switching cards are provided with H video input channels and H video output channels in total, and the switching cards are used for acquiring M multiplied by N video groups sent by M input modules and respectively sending each group of videos in the M multiplied by N video groups to corresponding output modules in one or more output modules based on the acquired first user instruction.
The output module is provided with C second backboard high-speed channels and C second video interface chips. Each second backboard high-speed channel acquires one video group sent by the switching card group, and each second video interface chip outputs any path of acquired video.
In order to explain the output module more clearly, Q output modules supporting C-channel video are used for explanation, and in practical application, one or more output modules, such as one card 2-channel, one card 4-channel, and one card 8-channel, may be placed in the device.
The switching unit is also provided with a first micro control unit for acquiring a first user instruction sent by the main control module and matching the M video output interfaces of the switching unit with the second backboard high-speed channels of the C output modules based on the first user instruction.
The output module is also provided with a second micro control unit which is used for acquiring a second user instruction sent by the main control module and respectively extracting any one path of video in one video group of each second backboard high-speed channel of each output module based on the second user instruction.
Because the input data switched by each switching unit contains all input video information, each output module can acquire N paths of arbitrary input videos from N back panel channels, therefore, the input from an M multiplied by N path to an Q multiplied by C path of the whole device is completely unobstructed, the requirement of the video display control device is met, the expansion of the switching scale from H path input, H path output to (M multiplied by N) path input and (Q multiplied by C) path output is realized, the number of ports of the traditional device is enlarged, the video switching is not limited by the number of the ports of the device, and the large-scale multi-path video interconnection switching can be realized.
As shown in fig. 2, a schematic diagram of a 320-channel video switching device framework according to an embodiment of the large-scale video display control matrix device based on the channel multiplexing technology of the present invention includes 160 input modules, 2 switching cards, and 160 output modules; each input module supports 2-channel video input and 2-channel high-speed backboard output, each switching card supports the video switching function of 160-channel video input and 160-channel video output, the switching unit supports the video switching function of 320-channel video input and 320-channel video output, and each output module supports 2-channel backboard high-speed input and 2-channel video output.
First, the input video of the input module 1 is recorded as 11, 12, the input video of the input module 2 is recorded as 21, 22, … …, and the input video of the input module 160 is recorded as 1601, 1602, and the video of each input module is copied and regrouped to obtain 160 × 2 sets of videos, each set of videos respectively including (11, 12), (11, 12) (21, 22), … …, (1601, 1602).
And then, after channel matching is carried out through the two 160-160 switching cards according to a first user instruction, each group of videos is sent to the high-speed input channel of the corresponding output module. In this embodiment, channel 1 of the output module 1 obtains video groups (11, 12), and channel 2 obtains video groups (801, 802); channel 1 of the output module 2 obtains video groups (801, 802), and channel 2 obtains video groups (11, 12); channel 1 of the output module 160 obtains video groups (41, 42), and channel 2 obtains video groups (1201, 1202); … …, the video groups obtained by the other output modules are not described in detail.
Finally, video extraction is carried out according to a second user instruction, and the two channels of the output module 1 respectively display the video 11 and the video 802; two channels of the output module 2 respectively display a video 801 and a video 12; two channels of the output module 160 respectively display the video 42 and the video 1201; … …, the videos output by the other output modules are not described in detail.
As shown in fig. 3, a 2-channel input module frame schematic diagram of an embodiment of a large-scale video display and control matrix device based on a channel multiplexing technology according to the present invention mainly includes an input video interface chip and an FPGA, where the video interface chip is responsible for accessing various video interface formats (such as HDMI, DVI, VGA, SDI, DP, etc.), and then is converted into a unified on-board video interface (RGB, BT1120, LVDS, etc.), and then is accessed into the FPGA, and the FPGA combines all videos into one transmission channel through the channel multiplexing technology, copies the channels on a backplane transmission side, and transmits the copied channels to 2 backplane channels. In this embodiment, the FPGA is used for video processing, and in other embodiments, other chips such as a DSP and an ASIC may also be used.
As shown in fig. 4, a frame diagram of a 160-channel video switching card according to an embodiment of the large-scale video display control matrix device based on the channel multiplexing technology includes a switching chip supporting 160-channel video input and 160-channel video output and a first micro processing unit (MCU) of a configuration chip, where the MCU is responsible for forwarding a switching instruction of a main control module and configuring the switching chip. The switching chip switches the designated multiplexed input video channel to the designated output channel according to the configuration. In this embodiment, the MCU is used for instruction forwarding and chip configuration, and other chips with similar functions may be used in other embodiments.
As shown in fig. 5, a schematic diagram of a 2-channel output module framework according to an embodiment of the large-scale video display control matrix device based on the channel multiplexing technology mainly includes a second micro processing unit (MCU), an output video interface chip, and an FPGA. And the MCU receives an output channel configuration instruction from the main control module, converts the configuration instruction into corresponding register setting of the FPGA, and then sets the register setting into the FPGA. The FPGA caches the video to a local memory, extracts corresponding video data according to a set value and outputs the video data, and the video data is sent to a video output interface chip through an on-board video interface and is output to external display equipment. In this embodiment, the FPGA is used for video processing, the MCU is used for instruction receiving, conversion, and configuration of the video output interface, and in other embodiments, other chips with similar functions may be used.
It should be noted that, the large-scale video display and control matrix device based on the channel multiplexing technology provided in the foregoing embodiment is only illustrated by the division of the above functional modules, and in practical applications, the above functions may be allocated to different functional modules according to needs, that is, the modules in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the above described functions. The names of the modules involved in the embodiments of the present invention are only for distinguishing the modules, and are not to be construed as an improper limitation of the present invention.
The terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing or implying a particular order or sequence.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (8)
1. A large-scale video display control matrix device based on a channel multiplexing technology comprises a back plate, a power supply module, a main control module, an air box and a case, and is characterized by further comprising one or more input modules, a switching unit and one or more output modules;
the input module is used for acquiring N paths of videos, copying each path of video in the N paths of videos into N parts, recombining the N parts of videos into N video groups, multiplexing channels and then sending the N video groups to the switching unit;
the switching unit respectively acquires N video groups sent by one or more input modules, and respectively sends each video group to a corresponding output module in one or more output modules based on an acquired first user instruction;
the output module is used for acquiring the video group sent by the switching unit, extracting any path of video in the video group based on the acquired second user instruction and outputting the video.
2. The large-scale video display and control matrix device based on channel multiplexing technology as claimed in claim 1, wherein the method of "recombining N video blocks into N video groups" comprises:
and taking the videos from different first video interface chips in the N parts of N videos as a group to obtain N video groups.
3. The large-scale video display control matrix equipment based on the channel multiplexing technology as claimed in claim 2, wherein 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 for acquiring a video; the first backplane high speed channel is for outputting a video set after being recombined.
4. The large-scale video display control matrix device based on the channel multiplexing technology as claimed in claim 1, wherein the switching unit comprises one or more switching cards; the switching unit is provided with H video input channels and H video output channels.
5. The large-scale video display control matrix equipment based on the channel multiplexing technology is characterized in that the output module is provided with C second backboard high-speed channels and C second video interface chips; the second backboard high-speed channel is used for acquiring a video group; the second video interface chip is used for outputting any path of video extracted based on a second user instruction.
6. The large-scale video display and control matrix device based on the channel multiplexing technology is characterized in that the switching unit is further provided with a first micro control unit;
the first micro control unit is used for acquiring a first user instruction sent by a main control module and matching the M video output interfaces of the switching unit with the second backboard high-speed channels of the C output modules based on the first user instruction.
7. The large-scale video display and control matrix device based on the channel multiplexing technology is characterized in that the output module is further provided with a second micro control unit;
the second micro control unit is used for acquiring a second user instruction sent by the main control module and extracting any one path of video in a video group of each second backboard high-speed channel of each output module based on the second user instruction.
8. The large-scale video display and control matrix device based on the channel multiplexing technology as claimed in claim 1, wherein one of the FPGA, DSP and ASIC chips is used as a backplane high-speed channel for video transmission.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111741235A (en) * | 2020-08-17 | 2020-10-02 | 成都智明达电子股份有限公司 | Multi-channel video switching method based on FPGA |
| CN112637523A (en) * | 2020-12-08 | 2021-04-09 | 北京淳中科技股份有限公司 | Switching card, display control equipment and video signal switching system |
| CN113301266A (en) * | 2020-02-21 | 2021-08-24 | 西安诺瓦星云科技股份有限公司 | Card insertion type video processing apparatus and display system |
| CN115225589A (en) * | 2022-07-17 | 2022-10-21 | 奕德(广州)科技有限公司 | CrossPoint switching method based on virtual packet switching |
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2019
- 2019-12-16 CN CN201911291616.8A patent/CN110784664A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113301266A (en) * | 2020-02-21 | 2021-08-24 | 西安诺瓦星云科技股份有限公司 | Card insertion type video processing apparatus and display system |
| CN111741235A (en) * | 2020-08-17 | 2020-10-02 | 成都智明达电子股份有限公司 | Multi-channel video switching method based on FPGA |
| CN111741235B (en) * | 2020-08-17 | 2020-12-01 | 成都智明达电子股份有限公司 | Multi-channel video switching method based on FPGA |
| CN112637523A (en) * | 2020-12-08 | 2021-04-09 | 北京淳中科技股份有限公司 | Switching card, display control equipment and video signal switching system |
| CN112637523B (en) * | 2020-12-08 | 2022-02-22 | 北京淳中科技股份有限公司 | Switching card, display control equipment and video signal switching system |
| CN115225589A (en) * | 2022-07-17 | 2022-10-21 | 奕德(广州)科技有限公司 | CrossPoint switching method based on virtual packet switching |
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