CN112637523A - Switching card, display control equipment and video signal switching system - Google Patents
Switching card, display control equipment and video signal switching system Download PDFInfo
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- CN112637523A CN112637523A CN202011461703.6A CN202011461703A CN112637523A CN 112637523 A CN112637523 A CN 112637523A CN 202011461703 A CN202011461703 A CN 202011461703A CN 112637523 A CN112637523 A CN 112637523A
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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
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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Abstract
The application relates to the technical field of video display, and provides a switching card, a display control device and a video signal switching system. The switching card includes: a plurality of input ports for connecting with input cards; a plurality of output ports for connection with an output card; the input side switching chip set comprises N1 first switching chips, and each first switching chip is respectively connected with each input port; the output side switching chip set comprises N2 second switching chips, and each second switching chip is respectively connected with each first switching chip and the output port; the input side switching chipset and the output side switching chipset have the same number of input channels and the same number of output channels, and both N1 and N2 are positive integers greater than 1. The invention can realize large-scale video signal switching by the arrangement mode of the cross-connected double-layer switching chip.
Description
Technical Field
The invention relates to the technical field of video display, in particular to a switching card, display control equipment and a video signal switching system.
Background
The display and control device comprises a video transmission matrix. The video transmission matrix outputs any one of the m input video signals to any one of the n output ports through array switching. The traditional video transmission matrix consists of an input card, a switching card, an output card and an interactive backboard, wherein the input card, the switching card and the output card are respectively inserted into the interactive backboard, and video signals are transmitted through the interactive backboard, wherein a data transmission link of the video signals is the input card → the switching card → the output card.
The display control device configured in mainstream in the market adopts a hardware architecture as shown in fig. 1, a switching chip is arranged in a switching card, every 4 input ports of the switching chip are connected with 4 output ports of an input card, every 4 output ports of the switching chip are connected with 4 input ports of an output card, the input card is internally provided with the input chip, 4 paths of video signals are simultaneously acquired by the maximum support, the output card is internally provided with the output chip, and 4 paths of signals are simultaneously pushed to the display device by the maximum support.
According to the architecture shown in fig. 1, the switching scale of the video signal of the display control device is limited by the maximum input/output channel scale of the switching chip that can be manufactured by the current technology, for example, the maximum input/output channel scale of the switching chip that can be manufactured currently is 160 × 160, that is, 160 video signal inputs and 160 video signal outputs; by designing 40 input cards, 40 output cards and 1 switching card with the size of 160 × 160 to form a signal switching link system, the video signal switching size of 160 × 160 can be realized.
With the increasing demand of switching scale, a 160 × 160 switching chip has been unable to meet the demand of switching video signals on a larger scale.
Disclosure of Invention
An object of the embodiments of the present application is to provide a switch card, a display control device, and a video signal switching system, which can complete larger-scale video signal switching by setting a plurality of cross-connected switch chips in the switch card.
In order to achieve the above purpose, the present application provides the following technical solutions:
in a first aspect, an embodiment of the present application provides a switch card, including:
a plurality of input ports for connecting with input cards;
a plurality of output ports for connection with an output card;
the input side switching chip set comprises N1 first switching chips, and each first switching chip is respectively connected with each input port;
the output side switching chip set comprises N2 second switching chips, and each second switching chip is respectively connected with each first switching chip and the output port; the input side switching chipset and the output side switching chipset have the same number of input channels and the same number of output channels, and both N1 and N2 are positive integers greater than 1;
each input port is used for transmitting a plurality of first video signal groups provided by the connected input cards to N1 first switching chips respectively; each first switching chip is used for grouping the obtained multiple paths of video signals, the grouped multiple second video signal groups are respectively transmitted to the N2 second switching chips, each second switching chip is used for outputting the obtained multiple paths of video signals to corresponding output ports, and each first video signal group and each second video signal group comprise at least one path of video signals.
According to the scheme, the double-layer switching chips are arranged in the switching card and are in cross connection, so that large-scale video signal switching can be realized. Moreover, the number of switching chips in the input side switching chip set and the number of switching chips in the output side switching chip set can be flexibly increased according to the video signal switching requirement.
In an optional implementation manner, each second switching chip is respectively connected with each output port, and the second switching chip is configured to receive a control instruction of the control card, where the control instruction includes a destination video signal and a destination output port, and output the destination video signal to the destination output port according to the control instruction; and the control instruction is generated by the control card according to the requirement information of the output card.
The second switching chip in the output side switching chip set switches the target video signal required by the output card to the target output port according to the control instruction of the control card, so that any one path of video signal provided by any input card can be output to any one output card.
In an alternative embodiment, the first switch chip is configured to distribute video signals from the same input card among the plurality of signals into N2 packets, respectively, to obtain N2 second video signal groups.
In an alternative embodiment, each first switching chip in the input-side switching chipset and each second switching chip in the output-side switching chipset have the same input-output channel size, and N1 is equal to N2.
In an alternative embodiment, the sizes of the input and output channels of the N1 first switching chips in the input side switching chipset are completely different or partially the same.
In an alternative embodiment, the sizes of the input and output channels of the N2 second switching chips in the output side switching chip group are completely different or partially the same.
In the above three embodiments, the number N1 of the first switching chips in the input side switching chip set and the number N2 of the second switching chips in the output side switching chip set may be the same or different, but the input side switching chip set and the output side switching chip set should have the same number of input channels and the same number of output channels.
In a second aspect, an embodiment of the present application provides a display and control device, including sequentially connected:
a plurality of input cards for providing video signals to the switch card;
the switch card according to the first aspect or any one of the optional embodiments of the first aspect;
a plurality of output cards for obtaining video signals from the switch card.
The display control equipment provided by the scheme can realize large-scale video signal switching.
In an optional implementation manner, the display and control device further includes: the control card is connected with the switching card and each output card respectively; the control card is used for acquiring the demand information of the output card, determining a target output port connected to the switching card and a demanded target video signal according to the demand information, and controlling a second switching chip in an output side switching chip group in the switching card to acquire the target video signal to output the target video signal to the target output port.
In an alternative embodiment, the input card is configured to obtain i video signals, and provide a plurality of video signal groups to the switch card after grouping the i video signals, where i is divisible by N1, and N1 is the number of first switch chips in the switch card.
The number of the i paths of video signals acquired by the input card can be evenly divided by N1, the input card equally divides the i paths of video signals transmitted by the video source equipment to obtain N1 first video signal groups, and each first video signal group comprises i/N1 paths of video signals. When i cannot be evenly divided by N1, the number of the obtained video signals in the N1 first video signal groups is not equal, so that it is inconvenient for the input card and the first switch chip to group the video signals, and the grouping process is complicated.
In a third aspect, an embodiment of the present application provides a video signal switching system, including:
the video source equipment is used for providing a video signal to the display control equipment;
the display control device according to any one of the second aspect and the optional embodiments of the second aspect, wherein the display control device includes a plurality of input cards, a switching card, and a plurality of output cards, which are connected in sequence, the plurality of input cards are used for being connected with the video source device, and the plurality of output cards are used for being connected with a display device;
and the display device is used for displaying the picture of the video signal output by the arbitrary output card.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a diagram illustrating a hardware architecture of a prior art display control device;
fig. 2 shows a schematic structural diagram of a switch card provided in an embodiment of the present application;
fig. 3 shows a schematic connection relationship diagram in a handover card when N1 is 2 and N2 is 4 in the embodiment of the present application;
fig. 4 shows a hardware structure diagram of a display and control device provided in an embodiment of the present application;
fig. 5 shows a signal transmission diagram in the display and control device shown in fig. 4;
fig. 6 shows a schematic diagram of a video signal switching system provided by an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "comprises," "comprising," or any other variation thereof, 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The embodiment of the application provides a switching card, a display control device and a video signal switching system. Fig. 2 shows a schematic diagram of a hardware structure of the switch card provided in this embodiment, please refer to fig. 2, where the switch card includes: a plurality of input ports 110, an input side switching chipset 120, an output side switching chipset 130, and a plurality of output ports 140. A plurality of input ports 110 are for connecting to input cards, each input card connected to one of the input ports 110, and a plurality of output ports 140 are for connecting to output cards, each output card connected to one of the output ports 140.
The input side switching chipset 120 includes N1 first switching chips, each of which is connected to each of the input ports 110, i.e., each of the input ports is connected to N1 first switching chips at the same time (fig. 2 only shows the connection relationship of one of the input ports). The output-side switching chipset 130 includes N2 second switching chips, each of which is connected to each of the first switching chips and to the output port 140, and the input-side switching chipset 120 and the output-side switching chipset 130 have the same number of input channels and the same number of output channels, each of the input channels is used for acquiring a video signal and each of the output channels is used for outputting a video signal. N1 and N2 are both positive integers greater than 1.
It should be noted that the number N1 of the first switching chips in the input side switching chip set 120 and the number N2 of the second switching chips in the output side switching chip set 130 may be the same or different, but the input side switching chip set 120 and the output side switching chip set 130 should have the same number of input channels and the same number of output channels. For example, if the input-side switching chipset 120 has 640 video signal inputs and 640 video signal outputs in total, the output-side switching chipset 130 similarly has 640 video signal inputs and 640 video signal outputs in common.
N1 and N2 are both positive integers greater than 1, for example, N1 is equal to N2, or N1 is equal to 2, and N2 is equal to 4, or N1 is equal to 4, and N2 is equal to 2, or N1 is equal to 4, and N2 is equal to 8, and the specific numbers of N1 and N2 are not limited in this embodiment.
In one embodiment, the sizes of the input/output channels of the N1 first switch chips and the sizes of the input/output channels of the N2 second switch chips are the same, and are both 160 × 160, so that each first switch chip and each second switch chip are 160 video signal inputs and 160 video signal outputs. At this time, the number of N1 is the same as the number of N2.
When both N1 and N2 are 4, 8 switching chips are provided in the switching card, and can receive input of 640 video signals and output of 640 video signals, the switching scale of the video signals can reach 640 x 640, and the switching card can output any one of the input 640 video signals from any one output port. For example, the output port 1 may output any of the video signals of the input cards 1 to m1, and similarly, the output port 2 may output any of the video signals of the input cards 1 to m 1.
In other embodiments, the sizes of the input and output channels of the N1 first switching chips in the input side switching chipset are completely the same, and the sizes of the input and output channels of the N2 second switching chips in the output side switching chipset are also completely the same, but the sizes of the input and output channels of the first switching chips and the sizes of the input and output channels of the second switching chips may be different, and at this time, the number of N1 is different from the number of N2.
Assuming that the i/o channel scales of the N1 first switch chips are 160 × 160, the i/o channel scales of the N2 second switch chips are 80 × 80, the number of N1 is 2, the number of N2 is 4, and the connection relationship in the switch card is as shown in fig. 3, at this time, the input side switch chipset has 320 i/o channels and 320 o/o channels in total, and the output side switch chipset also has 320 i/o channels and 320 o/o channels, which satisfies the condition that the input side switch chipset and the output side switch chipset have the same number of i/o channels and the same number of o/o channels.
In other embodiments, the sizes of the input and output channels of the N1 first switching chips in the input side switching chipset are completely different or partially the same.
In other embodiments, the sizes of the input and output channels of the N2 second switching chips in the output-side switching chip group are completely different or partially the same.
In the switch card, each input card is used for providing a plurality of first video signal groups to the connected input ports, and each input port is used for transmitting the plurality of first video signal groups provided by the connected input cards to N1 first switch chips respectively according to groups; each first switching chip is used for grouping the obtained multiple paths of video signals to obtain a plurality of second video signal groups, the plurality of second video signal groups are respectively transmitted to the N2 second switching chips according to grouping, and each second switching chip is used for outputting the obtained multiple paths of video signals to a corresponding output port. Each first video signal group and each second video signal group comprise at least one video signal.
In fig. 2, each second switching chip is connected to each output port, that is, each output port is simultaneously connected to N2 second switching chips (fig. 2 only shows the connection relationship of one of the output ports).
Each second switching chip is connected with a control card, the control card determines a target output port connected with the switching card and a required target video signal according to the requirement information of the output card, generates a control instruction and sends the control instruction to the corresponding second switching chip, the second switching chip is used for receiving the control instruction, the control instruction comprises the target video signal and the target output port, and the second switching chip outputs the target video signal to the target output port through the corresponding output channel according to the control instruction. The output card is connected to the destination output port, so that the output card can obtain the required destination video signal, and the display device can obtain the required destination video signal from the output card.
Of course, the second switching chip may not be connected to the output port according to the connection relationship in fig. 2, and the connection relationship between the second switching chip and the output port may be arbitrary. It can be understood that, in this embodiment, by cross-connecting N1 first switching chips and N2 second switching chips, all video signals can be output at the output ends of the N2 second switching chips, any one path of video signal can reach any one second switching chip through the first switching chip and be output from any one output channel of any one second switching chip, and therefore, how the second switching chip is specifically connected to the output port can be set according to requirements, and meanwhile, the control mode of the control card can be flexibly developed according to a specific connection relationship.
In a specific embodiment, each first switching chip and each second switching chip are connected to the control card, the control card determines a destination output port connected to the switching card and a desired destination video signal according to the requirement information of the output card, and determines a destination switching chip from all the second switching chips connected to the destination output port to generate a first control instruction and a second control instruction. The control card sends a first control instruction to a first switching chip which acquires the target video signal from the input side switching chip set so as to control the first switching chip to distribute the target video signal to a second video signal group corresponding to the target switching chip, so that the target switching chip can acquire the target video signal. And the control card sends a second control instruction to the target switching chip so as to control the target switching chip to output the target video signal to the target output port through the corresponding output channel. The output card is connected to the destination output port, so that the output card can obtain the required destination video signal, and the display device can obtain the required destination video signal from the output card.
It should be noted that the output card is connected to the output port, the multiple video signals can be acquired from the output port, and the output card can determine to output one or multiple of the multiple video signals as needed.
The above description of the control card implementation is only an example.
Optionally, the first switching chip is configured to distribute video signals from the same input card among the plurality of signals into N2 packets, respectively, to obtain N2 second video signal groups.
Fig. 4 shows a hardware structure schematic diagram of a display and control device provided in the embodiment of the present application. As shown in fig. 4, the display and control device includes: a plurality of input cards 210, switch card 100, and a plurality of output cards 230. The input cards 210, the switch card 100, and the output cards 230 are respectively plugged into an interactive backplane (not shown), and transmit video signals through the interactive backplane.
Wherein a plurality of input cards 210 are used to provide video signals to switch card 100. A plurality of input cards 210 are connected to a plurality of input ports on switch card 100 through a plurality of signal cables, and each input card 210 is connected to one input port.
The input card 210 is internally provided with a switching chip, which has video signal input, grouping and output functions, and is different from a common input chip, and the input/output channel of the switching chip has a larger scale, for example, the input/output channel scale may be 16 × 16, so that each input card 210 can acquire 16 video signals from video source equipment, group the 16 video signals, and output the grouped 16 video signals according to the groups.
Multiple input cards for respectively obtaining imA video signal is received and is in pair imThe channel video signals are grouped and then a plurality of video signal groups are provided to the switching card. i.e. imCorresponding to the mth input card of the plurality of input cards, e.g., input card 1 provides i after grouping to the switch card1For video signals, input card 2 supplies i after grouping to switch card2Video signals, and so on.
In one embodiment, imWhich is divisible by N1, N1 is the number of first switch chips in the switch card. When i ismWhen the input card can be divided by N1, the input card transmits i from video source equipmentmEqually dividing the video signals to obtain N1 first video signal groups, wherein each first video signal group comprises imand/N1 paths of video signals. When i ismWhen the video signals cannot be evenly divided by N1, the obtained N1 video signals in the first video signal group have different numbers, so that the video signals are not convenient to be grouped by the input card and the first switching chipThe process is relatively complex.
The plurality of output cards 230 are respectively used to acquire video signals from the switch card 100. A plurality of output cards 230 are connected to a plurality of output ports on switch card 100 by a plurality of signal cables, with each output card 230 connected to one output port.
The display control equipment further comprises: the control card 240 and the control card 240 are respectively connected to the switch card 100 and each output card 230, and are configured to acquire the requirement information of the output card 230 and control the switch card 100 to complete switching of the video signal according to the requirement information.
The switching process of the display control device of fig. 4 is described in detail below with a specific embodiment. In a specific embodiment, 40 input cards are designed, the input/output channel scale of each input card is 16 × 16, 8 switching chips are arranged in the switching card, namely switching chips 1 to 8, and the input/output channel scale of each switching chip is 160 × 160, wherein the switching chips 1 to 4 form an input side switching chip set, and the switching chips 5 to 8 form an output side switching chip set. Switching chips 1-4 in the input side switching chip group and switching chips 5-8 cross-connect of the output side switching chip group, namely: switching chip 1 is connected with switching chip 5 ~ 8 respectively, and switching chip 2 is connected with switching chip 5 ~ 8 respectively, and switching chip 3 is connected with switching chip 5 ~ 8 respectively, and switching chip 4 is connected with switching chip 5 ~ 8 respectively.
Fig. 5 shows a signal transmission diagram in the display control device shown in fig. 4, and referring to fig. 4 to 5, 40 input cards are connected to the switch card through 40 signal cables, each input card receives input of 16 video signals and groups the 16 video signals, so as to obtain 4 first video signal groups by grouping 4 × 4 video signals, and each first video signal group includes 4 video signals. Each input card transmits 4 first video signal groups to corresponding input ports on the switch card through signal cables.
The switching card receives the first video signal group from each input card, and sends each 4 channels of video signals to the switching chips 1-4 respectively according to the first video signal group of each input card, specifically, sends 4 first video signal groups from the input card 1 acquired by the input port 1 to the switching chips 1-4 respectively, sends 4 first video signal groups from the input card 2 acquired by the input port 2 to the switching chips 1-4 respectively, and so on. In this way, the switching chip 1 obtains 4 video signals from the input card 1, 4 video signals from the input card 2, … …, and 4 video signals from the input card 40, respectively, and obtains 40 × 4 to 160 video signals in total. Similarly, the switching chips 2 to 4 also respectively obtain 160 paths of video signals.
The switching chips 1-4 respectively group 160 video signals obtained respectively, 4 second video signal groups are obtained by grouping 4 × 40, and each second video signal group comprises 40 video signals. Each of the switching chips 1-4 transmits 160 channels of video signals to the switching chips 5-8 according to groups. In this way, the switching chip 5 obtains 40 video signals from the switching chip 1, 40 video signals from the switching chip 2, 40 video signals from the switching chip 3, and 40 video signals from the switching chip 4, respectively, and obtains 4 × 40 to 160 video signals in total. Similarly, the switching chips 6 to 8 also obtain 160 video signals respectively. The switching chips 5-8 output 160 video signals respectively.
It can be seen that the video signals provided by the input card to the switch card are 640 paths, the video signals output by the switch card to the output card are also 640 paths, and through the switching function between the switching chips 1-8, any one path of video signal can be switched to any one output port on the switching card for output, for example, output card 2 requires a certain destination video signal on input card 1, assuming that the destination video signal reaches switching chip 3, can be switched to the switching chip 5 by the switching chip 3, and then switched to the output port connected with the output card 2 by the switching chip 5 for output, so that the output card 2 obtains the destination video signal, which, for example, the output card 2 requires a destination video signal on the input card 40, assuming that the destination video signal reaches the switching chip 1, the switching chip 1 can switch the output signal to the switching chip 5, and the switching chip 5 switches the output signal to the output port connected to the output card 2 for output.
By the arrangement mode of the cross-connected double-layer switching chips, large-scale video signal switching can be realized. Compared with the switching card formed by one switching chip with the size of 160 × 160 in the prior art, the switching size is enlarged 640/160 times by 4 times. By flexibly increasing the number of switching chips in the input side switching chip set and the number of switching chips in the output side switching chip set, larger-scale video signal switching can be realized.
For example, if the number of the switching chips in the input side switching chipset and the output side switching chipset is N, that is, the total number of the switching chips in the switching card is 2N, the switching scale of the switching card is enlarged by N times by 2N switching chips compared with the prior art.
An embodiment of the present application provides a video signal switching system, please refer to fig. 6, the video signal switching system includes: the display control device 320 comprises a plurality of input cards, a switching card and a plurality of output cards which are sequentially connected, wherein the input cards are used for being connected with the video source device 310, and the output cards are used for being connected with the display device 330; the video source device 310 is configured to provide a video signal to the display control device 320, an input card in the display control device 320 obtains multiple paths of video signals provided by the video source device 310, and switches the video signals to a corresponding output card through a switch card, and the display device 330 is connected to the output card and configured to display a picture of the video signal output by the connected output card.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A switch card, comprising:
a plurality of input ports for connecting with input cards;
a plurality of output ports for connection with an output card;
the input side switching chip set comprises N1 first switching chips, and each first switching chip is respectively connected with each input port;
the output side switching chip set comprises N2 second switching chips, and each second switching chip is respectively connected with each first switching chip and the output port; the input side switching chipset and the output side switching chipset have the same number of input channels and the same number of output channels, and both N1 and N2 are positive integers greater than 1;
each input port is used for transmitting a plurality of first video signal groups provided by the connected input cards to N1 first switching chips respectively; each first switching chip is used for grouping the obtained multiple paths of video signals, the grouped multiple second video signal groups are respectively transmitted to the N2 second switching chips, each second switching chip is used for outputting the obtained multiple paths of video signals to corresponding output ports, and each first video signal group and each second video signal group comprise at least one path of video signals.
2. The switch card of claim 1, wherein each second switch chip is connected to each output port, and the second switch chip is configured to receive a control command of the control card, where the control command includes a destination video signal and a destination output port, and output the destination video signal to the destination output port according to the control command; and the control instruction is generated by the control card according to the requirement information of the output card.
3. The switch card of claim 1, wherein said first switch chip is configured to distribute video signals from the same input card among the plurality of signals into N2 packets, respectively, to obtain N2 second video signal groups.
4. The switch card of any of claims 1-3, wherein each first switch chip in the input-side switch chip set and each second switch chip in the output-side switch chip set have the same input-output channel size, N1 being equal to N2.
5. The switch card according to any one of claims 1 to 3, wherein the I/O channel sizes of the N1 first switch chips in the input side switch chipset are completely different or partially the same.
6. The switch card of any one of claims 1 to 3, wherein the I/O channels of the N2 second switch chips in the output-side switch chip group are completely different in size or partially identical.
7. The display control equipment is characterized by comprising the following components in sequential connection:
a plurality of input cards for providing video signals to the switch card;
the switch card of any of claims 1-6;
a plurality of output cards for obtaining video signals from the switch card.
8. The display control apparatus according to claim 7, further comprising:
the control card is connected with the switching card and each output card respectively;
the control card is used for acquiring the demand information of the output card, determining a target output port connected to the switching card and a demanded target video signal according to the demand information, and controlling a second switching chip in an output side switching chip group in the switching card to acquire the target video signal to output the target video signal to the target output port.
9. The display control device according to claim 7 or 8, wherein the input card is configured to obtain i-channel video signals, and provide a plurality of video signal groups to the switch card after grouping the i-channel video signals, wherein i is divisible by N1, and N1 is the number of first switch chips in the switch card.
10. A video signal switching system, comprising:
the video source equipment is used for providing a video signal to the display control equipment;
the display control device of any one of claims 7-9, comprising a plurality of input cards for connecting with the video source device, a switching card, and a plurality of output cards for connecting with a display device, connected in sequence;
and the display device is used for displaying the picture of the video signal output by the arbitrary output card.
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