a video splitter
A technology for video splitter and video signal distribution, which is applied in the electronic field and can solve the problem that the video splitter cannot meet the coaxial control function.
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Embodiment 1
[0051] figure 2 A schematic structural diagram of a video distributor provided by an embodiment of the present invention, the video distributor includes: an analog video input module 21, an anti-control signal superposition module 22, at least one analog video output module 23 and at least one anti-control signal extraction module 24, wherein the analog video output module 23 has the same number as the anti-control signal extraction module 24; wherein,
[0052] Each analog video output module 23 is used to connect to the storage device through the corresponding first coaxial cable, each analog video output module 23 is connected to the corresponding counter-control signal extraction module 24, and the counter-control signal extraction module 24 judges Whether the anti-control signal is transmitted in the corresponding first coaxial cable, if yes, extract the anti-control signal in the first coaxial cable, and send the extracted anti-control signal to the anti-control signal s...
Embodiment 2
[0060] In the above-mentioned embodiment, the anti-control signal superposition module 22 can send the superimposed anti-control signal to the video acquisition device through the analog video input module 21. Meanwhile, the anti-control signal after the superposition processing may also be input through the analog The module 21 transmits to the analog video output module 23 corresponding to the counter-control signal extraction module 24 that has extracted the counter-control signal, and then transmits to the counter-control signal extraction module 24, so that the counter-control signal forms a closed loop. The formation of a closed loop of the anti-control signal will lead to inaccurate extraction of the anti-control signal by the anti-control signal extraction module 24. In order to prevent the formation of a closed loop of the anti-control signal, on the basis of the above embodiments, in the embodiment of the present invention, image 3 A schematic structural diagram of a...
Embodiment 3
[0072] On the basis of the above-mentioned embodiments of the present invention, in the embodiments of the present invention, Figure 7 A schematic structural diagram of a video distributor provided by an embodiment of the present invention, the video distributor further includes: at least one load detection module 41, wherein the number of the load detection modules 41 is the same as the number of the counter-control signal extraction modules 24 same;
[0073] Each load detection module 41 is connected with the corresponding analog video output module 23, and is connected with the corresponding first module switch 32. The load detection module 41 detects whether the corresponding first coaxial cable is connected to the storage device, and when it is determined that it is not connected When the storage device is used, the corresponding first module switch 32 is controlled to be turned off, and the path between the video signal distribution module 31 and the corresponding analo...
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