A device based on seamless matrix switching system and control method thereof

Abstract

The present invention relates to the technical field of hybrid matrix, and in particular to a device based on a seamless matrix switching system and a control method thereof, wherein the device comprises: a plurality of signal input ports; a plurality of displays; a detector for detecting a frame rate and a jam rate of an original video signal; a main control module for transmitting the acquired resolution setting parameters of the display to a seamless matrix host for storage, and transmitting the original video signal and the detection result to the seamless matrix host; the seamless matrix host for adjusting the running state of the device according to the detection result, and transmitting the video output signal to the corresponding display according to the resolution setting parameter; the present invention detects the frame rate of the video signal to determine whether the video signal is lost due to long-distance transmission, and further improves the stability and accuracy of the seamless matrix switching system device while reducing the video playback jam rate by predicting the video jam rate.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid matrices, and in particular to a device based on a seamless matrix switching system and a control method thereof. Background Art

[0002] With the development of technology, people will use a variety of display terminals to watch videos. In order to meet the playback requirements of different terminals, the central control terminal has the function of resolution switching. However, when switching, video sequences with different resolutions will experience frame loss, frame skipping, stagnation, etc., resulting in discontinuous phenomena such as backward, jumping, and freezing of the playback picture, affecting the audience experience.

[0003] Chinese patent application publication number: CN113891019A discloses a video encoding method, device, shooting equipment and storage medium. The invention relates to a video encoding method, device, shooting equipment and storage medium. The method comprises: obtaining a target output channel and at least one non-target output channel in at least two video output channels, encoding a video frame including a key frame of non-target video data of at least one non-target output channel; obtaining an image output channel switching instruction, and taking the non-target output channel specified by the channel switching instruction as a new target output channel according to the channel switching instruction, and taking the target output channel as a new non-target output channel; obtaining the key frame code corresponding to the key frame currently encoded by the non-target output channel specified by the channel switching instruction, and outputting the key frame code. The method can realize seamless switching of multiple output channels of the camera device, effectively improving the user's viewing experience.

[0004] Chinese patent application publication number: CN110446072A discloses a video stream switching method, an electronic device and a storage medium. The invention provides a video stream switching method, an electronic device and a storage medium. The method comprises: after determining to perform a switching operation of video stream switching, if it is determined that the frame rate of the current video stream is different from the frame rate of the target video stream, then determining the alignment moment of the current video stream according to the switching moment corresponding to the switching operation; wherein a video frame is set at the position of the alignment moment in the current video stream; performing interpolation processing at the position corresponding to the alignment moment in the target video stream to obtain the target video stream after the interpolation processing; and executing the switching operation according to the target video stream after the interpolation processing. The embodiment of the invention can realize seamless switching of video streams of different resolutions, with small amount of calculation and low implementation complexity.

[0005] However, the above method has the following problems: when switching between different channels, if the key frame is lost, it will greatly affect the smoothness of the switching. The position of the video signal interpolation processing is determined by comparing with the target video to perform interpolation processing to execute the switching operation. It is impossible to ensure that the video is not stuck and it cannot adapt to the requirements of different resolutions supported by different models and different groups of displays. Summary of the invention

[0006] To this end, the present invention provides a device based on a seamless matrix switching system and a control method thereof, so as to overcome the problem in the prior art that when switching between different channels, if the key frame is lost, the smoothness of the switching is greatly affected, and the position of the video signal interpolation processing is determined by comparing with the target video to perform interpolation processing to execute the switching operation, but the video cannot be smoothed and cannot adapt to the requirements of different resolutions supported by different models and different groups of displays.

[0007] To achieve the above object, on the one hand, the present invention provides a device based on a seamless matrix switching system, comprising:

[0008] A plurality of signal input ports for receiving original video signals;

[0009] A plurality of displays for outputting video output signals;

[0010] A detector connected to the signal input port, for detecting a frame rate and a freeze rate of the original video signal;

[0011] A main control module, which is connected to the signal input port, the display and the detector respectively, and is used to transmit the acquired resolution setting parameters of the display to the seamless matrix host for storage, and to obtain the detection results of the frame rate and the jamming rate of the original video signal, and transmit the original video signal and the detection results to the seamless matrix host;

[0012] The seamless matrix host is connected to the main control module, and is used to receive the original video signal, the detection result and the resolution setting parameter, adjust the operating state of the regulating device according to the detection result, and transmit the video output signal to the corresponding display according to the resolution setting parameter;

[0013] The resolution setting parameters include the resolution output by the display; and the adjustment device includes a signal extender, a heat sink and a voltage enhancer.

[0014] Furthermore, the seamless matrix host comprises:

[0015] The signal extender is connected to the signal input port and the main control module respectively, and is used to enhance the original video signal based on the principle of digital signal conversion;

[0016] A plurality of memories connected to the main control module for storing the received resolution setting parameters of the display;

[0017] The radiator is connected to the main control module and is used to dissipate heat for the main control module and the seamless matrix host;

[0018] The voltage booster is connected to the main control module and the memory respectively, and is used to boost the voltage of the video output signal;

[0019] An alarm is connected to the main control module and is used to send out an audible and visual alarm when the main control module detects a damage signal.

[0020] Further, the main control module determines whether the original video signal is a first type of video signal, a second type of video signal or a damaged signal according to a comparison result between the detected frame rate of the original video signal and a first frame rate preset value and a second frame rate preset value;

[0021] Among them, the frame rate is the number of frames transmitted by the original video signal per second; the first frame rate preset value and the second frame rate preset value are positively correlated with the rated voltage of the seamless matrix host; the first frame rate preset value is greater than the second frame rate preset value.

[0022] Furthermore, the signal extender is turned on when the main control module determines that the original video signal belongs to the second type of video signal, so as to enhance the original video signal through the principle of digital signal conversion.

[0023] Further, the main control module determines whether the jamming situation of the first type of video signal playback is the first jamming situation or the second jamming situation according to the comparison result between the number of displays and the first preset number and the second preset number,

[0024] Among them, the first jamming situation and the second jamming situation are situations where the display cannot play the video continuously; the first preset number and the second preset number are positively correlated with the total power of the display; the first preset number is less than the second preset number.

[0025] Further, the voltage booster is turned on when the main control module determines that the first jamming situation or the second jamming situation occurs, and determines the voltage boost amount according to the difference between the number of displays and the first preset number or the second preset number;

[0026] The radiator is turned on when the main control module determines that the second jamming situation occurs.

[0027] Further, the main control module determines that the first type of video signal is the video output signal and transmits it to the corresponding display when determining that the freeze situation does not occur;

[0028] When the voltage booster and / or the heat sink are turned on, the first type of video signal is determined to be the video output signal and transmitted to the corresponding display.

[0029] On the other hand, the present invention provides a control method based on a seamless matrix switching system, comprising:

[0030] Transmitting resolution setting parameters of several displays to a seamless matrix host for storage;

[0031] Detecting the frame rate and freeze rate of the received original video signal and transmitting the original video signal and the detection result to the seamless matrix host;

[0032] Determining the type of the original video signal and whether to start a signal extender or an alarm according to a detection result of the frame rate of the original video signal;

[0033] Determine the number of displays capable of receiving the first type of video signal according to the resolution setting parameter, determine a jamming condition of the first type of video signal, and determine whether to turn on a voltage booster and / or a heat sink according to the jamming condition;

[0034] The main control module determines whether the first type of video signal in different states is a video output signal;

[0035] The video output signal is transmitted to the corresponding display according to the resolution setting parameter.

[0036] Furthermore, the step of determining the type of the original video signal and determining whether to start the signal extender according to the detection result of the frame rate of the original video signal includes:

[0037] Determining whether the original video signal is the first type of video signal, the second type of video signal, or a damaged signal according to a detection result of the frame rate of the original video signal;

[0038] The signal extender is turned on when the main control module determines that the original video signal belongs to the second type of video signal;

[0039] When the main control module determines that the original video signal belongs to the damaged signal, the alarm emits an audible and visual alarm.

[0040] Furthermore, the step of the main control module determining whether the first type of video signal in different states is the video output signal includes:

[0041] In a state where it is determined that the freeze situation does not occur, determining that the first type of video signal is the video output signal and transmitting it to a corresponding display;

[0042] When the voltage booster and / or the heat sink are turned on, the first type of video signal is determined to be the video output signal and transmitted to the corresponding display.

[0043] Compared with the prior art, the beneficial effect of the present invention lies in that the seamless matrix of the present invention is suitable for the input and output of video signals in various formats, and can achieve completely seamless switching, completely continuous display, no black screen, no blue screen, no flickering, and no pause. The same or different resolutions can be configured for each output channel, and the frame rate of the video signal is detected to determine whether the video signal frame loss is caused by long-distance transmission. When the video signal frame loss is detected, a signal extender is used to enhance the video signal, thereby effectively improving the stability and accuracy of the seamless matrix switching system equipment.

[0044] Furthermore, by detecting the number of displays that can play video signals, when the overall power of the device is determined, it is possible to predict whether the power of a single display will be affected, thereby causing the video signal to freeze. At the same time, the calculation frequency of the system equipment increases, causing itself to heat up, and the temperature increase affects the operation of the equipment. Therefore, a voltage booster is set to increase the power of the system equipment, and a radiator is set to strengthen the control of the temperature of the system equipment. While reducing the video playback freeze rate, the stability and accuracy of the seamless matrix switching system equipment are further improved.

[0045] Furthermore, by setting parameters according to the resolutions of different displays, the video signal can be transmitted to the display accordingly, which effectively avoids the display displaying a video signal with a mismatched resolution, while further improving the stability and accuracy of the seamless matrix switching system equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural block diagram of the seamless matrix switching system based on the present invention;

[0047] Figure 2 It is a flow chart of a control method based on a seamless matrix switching system according to an embodiment of the present invention;

[0048] Figure 3 A flow chart for determining the type of an original video signal according to an embodiment of the present invention;

[0049] Figure 4 The present invention is a flowchart of determining a jamming situation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0052] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0053] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] See also Figure 1 As shown, it is a structural block diagram of the seamless matrix switching system based on the present invention. On the one hand, an embodiment of the present invention provides a device based on the seamless matrix switching system, including:

[0055] A plurality of signal input ports for receiving original video signals;

[0056] A plurality of displays for outputting video output signals;

[0057] A detector, connected to the signal input port, for detecting a frame rate and a freeze rate of the original video signal;

[0058] A main control module, which is connected to the signal input port, the display and the detector respectively, and is used to transmit the acquired resolution setting parameters of the display to the seamless matrix host for storage, and to obtain the detection results of the frame rate and the freeze rate of the original video signal, and transmit the original video signal and the detection results to the seamless matrix host;

[0059] A seamless matrix host, which is connected to the main control module, is used to receive the original video signal, the detection result and the resolution setting parameter, adjust the operating state of the regulating device according to the detection result, and transmit the video output signal to the corresponding display according to the resolution setting parameter;

[0060] The resolution setting parameters include the resolution output by the display; the adjustment equipment includes a signal extender, a heat sink and a voltage enhancer.

[0061] Specifically, the seamless matrix host includes,

[0062] A signal extender, which is connected to the signal input port and the main control module respectively, and is used to enhance the original video signal based on the principle of digital signal conversion;

[0063] A plurality of memories connected to the main control module for storing received resolution setting parameters of the display;

[0064] A radiator connected to the main control module to dissipate heat for the main control module and the seamless matrix host;

[0065] A voltage booster, which is connected to the main control module and the memory respectively, and is used to boost the voltage of the video output signal;

[0066] The alarm is connected to the main control module and is used to send out an audible and visual alarm when the main control module detects a damage signal.

[0067] See also Figure 3 As shown, it is a flow chart of determining the type of the original video signal according to an embodiment of the present invention, the main control module determines the type of the original video signal according to the comparison result between the detected frame rate of the original video signal and the first frame rate preset value and the second frame rate preset value:

[0068] If the frame rate of the original video signal is greater than or equal to a first frame rate preset value, then determining that the original video signal belongs to a first type of video signal;

[0069] If the frame rate of the original video signal is less than the first frame rate preset value and greater than or equal to the second frame rate preset value, then determining that the original video signal belongs to the second category of video signals;

[0070] If the frame rate of the original video signal is less than the second frame rate preset value, it is determined that the original video signal is a damaged signal;

[0071] Embodiment 1: In a specific embodiment, the first frame rate preset value is 30 frames per second, and the second frame rate preset value is 10 frames per second. If the frame rate of the original video signal is 35 frames per second, which is greater than the first frame rate preset value of 30 frames per second, then it is determined that the original video signal belongs to the first category of video signals;

[0072] If the frame rate of the original video signal is 25 frames per second, which is less than the first preset frame rate value of 30 frames per second and greater than or equal to the second preset frame rate value of 10 frames per second, then it is determined that the original video signal belongs to the second category of video signals;

[0073] If the frame rate of the original video signal, 5 frames per second, is less than the second preset frame rate value, 10 frames per second, then it is determined that the original video signal is a damaged signal.

[0074] Among them, the frame rate is the number of frames transmitted by the original video signal per second; the first frame rate preset value and the second frame rate preset value are positively correlated with the rated voltage of the seamless matrix host; the first frame rate preset value is greater than the second frame rate preset value.

[0075] It can be understood that, when the rated voltage of the seamless matrix host is greater and the frequency of processing the video signal is higher, the first frame rate preset value and the second frame rate preset value are higher.

[0076] Optionally, when the rated voltage of the seamless matrix host is 180 volts, the first frame rate preset value is 15 frames per second, and the second frame rate preset value is 5 frames per second;

[0077] When the rated voltage of the seamless matrix host is 220 volts, the first frame rate preset value is 20 frames per second, and the second frame rate preset value is 8 frames per second;

[0078] When the rated voltage of the seamless matrix host is 250 volts, the first frame rate preset value is 30 frames per second, and the second frame rate preset value is 11 frames per second.

[0079] Specifically, the seamless matrix of the present invention is suitable for the input and output of video signals in various formats, and can achieve completely seamless switching and completely continuous display without black screen, blue screen, flickering screen or pause. The same or different resolutions can be configured for each output channel. The frame rate of the video signal is detected to determine whether the video signal has lost frames due to long-distance transmission. When the video signal has lost frames, a signal extender is used to enhance the video signal, thereby effectively improving the stability and accuracy of the seamless matrix switching system equipment.

[0080] Specifically, the signal extender is turned on when the main control module determines that the original video signal belongs to the second type of video signal, so as to enhance the original video signal through the principle of digital signal conversion.

[0081] See also Figure 4 As shown, it is a flowchart of determining the jamming situation in an embodiment of the present invention. The main control module determines the number of displays that can receive the first type of video signal according to the resolution setting parameter, and determines whether the jamming situation of the first type of video signal playback is the first jamming situation or the second jamming situation according to the comparison result between the number of displays and the first preset number and the second preset number, wherein:

[0082] If the number of displays is less than the first preset number, it is determined that no freeze occurs;

[0083] If the number of displays is not less than the first preset number and less than the second preset number, it is determined that a first jamming situation occurs;

[0084] If the number of displays is not less than a second preset number, determining that a second freeze condition occurs;

[0085] Embodiment 2: Based on Embodiment 1, this embodiment is different from the embodiment 1 in that when the total number of monitors is 30, the first preset number is 10, the second preset number is 20, and if the number of monitors is 5, which is less than the first preset number of 10, it is determined that no freeze occurs;

[0086] If the number of monitors is 15, which is greater than the first preset number of 10 and less than the second preset number of 20, it is determined that the first jamming situation occurs;

[0087] If the number of monitors is 25 and is greater than the second preset number of 20, it is determined that a second jamming situation occurs;

[0088] The first and second jamming conditions are situations where the display cannot play the video continuously; the first preset number and the second preset number are positively correlated with the total power of the display; the first preset number is less than the second preset number.

[0089] It is understandable that, when the number of displays is certain, the higher the total power of the displays, the higher the average power of the displays, and the stronger the video processing capability, the higher the first preset number and the second preset number.

[0090] Optionally, when the total power of the display is 1500 watts, the first preset number is 10 units and the second preset number is 20 units;

[0091] When the total power of the monitors is 2000 watts, the first preset number is 15 units and the second preset number is 30 units;

[0092] When the total power of the monitors is 3000 watts, the first preset number is 25 units and the second preset number is 50 units.

[0093] Specifically, by detecting the number of displays that can play video signals, when the overall power of the device is determined, it is possible to predict whether the power of a single display will be affected, thereby causing the video signal to freeze. At the same time, the calculation frequency of the system equipment increases, causing itself to heat up, and the temperature increase affects the operation of the equipment. Therefore, a voltage booster is set to increase the power of the system equipment, and a radiator is set to strengthen the control of the temperature of the system equipment. While reducing the video playback freeze rate, the stability and accuracy of the seamless matrix switching system equipment are further improved.

[0094] Specifically, the voltage booster is turned on when the main control module determines that the first jamming situation or the second jamming situation occurs, and determines the voltage boost amount according to the difference between the number of displays and the first preset number or the second preset number;

[0095] The radiator is turned on when the main control module determines that the second jamming situation occurs.

[0096] Specifically, the main control module determines that the first type of video signal is a video output signal and transmits it to the corresponding display when determining that there is no freeze situation;

[0097] When the voltage booster and / or the heat sink are turned on, the first type of video signal is determined to be a video output signal and transmitted to a corresponding display.

[0098] Specifically, by setting parameters according to the resolution of different monitors, the video signal can be transmitted to the monitor accordingly, which effectively avoids the monitor displaying video signals with mismatched resolutions, while further improving the stability and accuracy of the seamless matrix switching system equipment.

[0099] See also Figure 2 As shown, it is a flow chart of a control method based on a seamless matrix switching system according to an embodiment of the present invention. The present invention provides a control method based on a seamless matrix switching system, comprising:

[0100] Step S1, transmitting resolution setting parameters of a plurality of displays to a seamless matrix host for storage;

[0101] Step S2, detecting the frame rate and freeze rate of the received original video signal and transmitting the original video signal and the detection result to the seamless matrix host;

[0102] Step S3, determining the type of the original video signal and determining whether to start the signal extender or the alarm according to the detection result of the frame rate of the original video signal;

[0103] Step S4, determining the number of displays capable of receiving the first type of video signal according to the resolution setting parameter, determining a jamming condition of the first type of video signal, and determining whether to turn on a voltage booster and / or a heat sink according to the jamming condition;

[0104] Step S5, the main control module determines whether the first type of video signal in different states is a video output signal;

[0105] Step S6, transmitting the video output signal to the corresponding display according to the resolution setting parameters.

[0106] Specifically, in step S3, the step of determining the type of the original video signal and determining whether to start the signal extender according to the detection result of the frame rate of the original video signal includes:

[0107] Step S31, judging whether the original video signal is a first type of video signal or a second type of video signal or a damaged signal according to the detection result of the frame rate of the original video signal;

[0108] Step S32, when the main control module determines that the original video signal belongs to the second type of video signal, the signal extender is turned on;

[0109] Step S33, when the main control module determines that the original video signal is a damaged signal, the alarm device sends out an audible and visual alarm.

[0110] Specifically, in step S5, the main control module determines whether the first type of video signal in different states is a video output signal, including:

[0111] Step S51, when it is determined that there is no freeze, determining that the first type of video signal is a video output signal and transmitting it to a corresponding display;

[0112] Step S51 : in a state where the voltage booster and / or the heat sink are turned on, determining that the first type of video signal is a video output signal and transmitting it to a corresponding display.

[0113] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0114] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device based on a seamless matrix switching system, It is characterized in that include: A plurality of signal input ports for receiving original video signals; A plurality of displays for outputting video output signals; A detector connected to the signal input port, for detecting a frame rate and a freeze rate of the original video signal; A main control module, which is connected to the signal input port, the display and the detector respectively, and is used to transmit the acquired resolution setting parameters of the display to the seamless matrix host for storage, and to obtain the detection results of the frame rate and the jamming rate of the original video signal, and transmit the original video signal and the detection results to the seamless matrix host; The seamless matrix host is connected to the main control module, and is used to receive the original video signal, the detection result and the resolution setting parameter, adjust the operating state of the regulating device according to the detection result, and transmit the video output signal to the corresponding display according to the resolution setting parameter; Wherein, the resolution setting parameter includes the resolution output by the display; the adjustment device includes a signal extender, a heat sink and a voltage enhancer; The main control module determines whether the original video signal is a first type of video signal, a second type of video signal or a damaged signal according to a comparison result between the detected frame rate of the original video signal and a first frame rate preset value and a second frame rate preset value; The frame rate is the number of frames transmitted per second by the original video signal; the first frame rate preset value and the second frame rate preset value are positively correlated with the rated voltage of the seamless matrix host; the first frame rate preset value is greater than the second frame rate preset value; The main control module determines whether the jamming condition of the first type of video signal playback is the first jamming condition or the second jamming condition according to the comparison result between the number of displays and the first preset number and the second preset number, The first jamming condition and the second jamming condition are conditions where the display cannot play the video continuously; the first preset number and the second preset number are positively correlated with the total power of the display; the first preset number is less than the second preset number; The voltage booster is turned on when the main control module determines that the first jamming situation or the second jamming situation occurs, and determines the voltage boost amount according to the difference between the number of displays and the first preset number or the second preset number; The radiator is turned on when the main control module determines that the second jamming situation occurs.

2. The device based on the seamless matrix switching system according to claim 1, It is characterized in that The seamless matrix host comprises: The signal extender is connected to the signal input port and the main control module respectively, and is used to enhance the original video signal based on the principle of digital signal conversion; A plurality of memories connected to the main control module for storing the received resolution setting parameters of the display; The radiator is connected to the main control module and is used to dissipate heat for the main control module and the seamless matrix host; The voltage booster is connected to the main control module and the memory respectively, and is used to boost the voltage of the video output signal; An alarm is connected to the main control module and is used to send out an audible and visual alarm when the main control module detects a damage signal.

3. The device based on the seamless matrix switching system according to claim 2, It is characterized in that The signal extender is turned on when the main control module determines that the original video signal belongs to the second type of video signal, so as to enhance the original video signal through the principle of digital signal conversion.

4. The device based on the seamless matrix switching system according to claim 3, It is characterized in that The main control module determines that the first type of video signal is the video output signal and transmits it to the corresponding display when determining that the freeze situation does not occur; When the voltage booster and / or the heat sink are turned on, the first type of video signal is determined to be the video output signal and transmitted to the corresponding display.

5. A control method using a device based on a seamless matrix switching system according to any one of claims 1 to 4, It is characterized in that include: Transmitting resolution setting parameters of several displays to a seamless matrix host for storage; Detecting the frame rate and freeze rate of the received original video signal and transmitting the original video signal and the detection result to the seamless matrix host; Determining the type of the original video signal and whether to start a signal extender or an alarm according to a detection result of the frame rate of the original video signal; Determine the number of displays capable of receiving the first type of video signal according to the resolution setting parameter, determine a jamming condition of the first type of video signal, and determine whether to turn on a voltage booster and / or a heat sink according to the jamming condition; The main control module determines whether the first type of video signal in different states is a video output signal; The video output signal is transmitted to the corresponding display according to the resolution setting parameter.

6. The control method according to claim 5, It is characterized in that The steps of determining the type of the original video signal and determining whether to start the signal extender according to the detection result of the frame rate of the original video signal include: Determining whether the original video signal is the first type of video signal, the second type of video signal, or a damaged signal according to a detection result of the frame rate of the original video signal; The signal extender is turned on when the main control module determines that the original video signal belongs to the second type of video signal; When the main control module determines that the original video signal belongs to the damaged signal, the alarm emits an audible and visual alarm.

7. The control method according to claim 6, It is characterized in that The step of the main control module determining whether the first type of video signal in different states is the video output signal comprises: In a state where it is determined that the freeze situation does not occur, determining that the first type of video signal is the video output signal and transmitting it to a corresponding display; When the voltage booster and / or the heat sink are turned on, the first type of video signal is determined to be the video output signal and transmitted to the corresponding display.

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