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Video electromagnetic leakage signal protection system and method

A technology of leakage signal and protection system, applied in the direction of cable transmission adaptation, etc., can solve the problem of electromagnetic leakage of video cables, and achieve strong anti-electromagnetic information leakage ability, strong versatility and compatibility, and strong anti-electromagnetic information leakage ability. Effect

Inactive Publication Date: 2016-06-15
BEIJING INST OF COMP TECH & APPL
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a video electromagnetic leakage signal protection system and its method to solve the problem of electromagnetic leakage of video cables in the prior art

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  • Video electromagnetic leakage signal protection system and method
  • Video electromagnetic leakage signal protection system and method
  • Video electromagnetic leakage signal protection system and method

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0042] The purpose of the invention is to provide a new technology for effectively reducing the electromagnetic leakage of computer video. The invention is a novel video electromagnetic leakage signal protection system, which mainly includes a video signal cancellation circuit control module and a cancellation cable. Through the characteristics of the differential signal, the electromagnetic signal in the space is effectively reduced.

[0043] figure 1 It is a structural schematic diagram of the leakage signal protection system of the present invention, such as figure 1 As shown, a kind of video electromagnetic leakage signal protection system provided by the present invention is arranged between the host computer communication interface 1 and the display communication interface 4, including...

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Abstract

The present invention discloses a video electromagnetic leakage signal protection system. The system is arranged between a computer host communication interface and a display communication interface. The system comprises a cancellation circuit control module and a cancellation cable. The cancellation circuit control module is electrically connected with the computer host communication interface, and produces an in-phase signal and an inverted signal from an input video signal. The in-phase signal and the inverted signal are canceled in a spatial electromagnetic field. The cancellation cable is electrically connected between the cancellation circuit control module and the display communication interface, receives the in-phase signal and the inverted signal, transmits the in-phase signal and the inverted signal to the display, and performs impedance matching on the inverted signal in transmission.

Description

technical field [0001] The invention relates to an electromagnetic leakage protection method, in particular to a new technology for effectively reducing computer video electromagnetic leakage. Background technique [0002] In the computer display system, the output of the computer graphics card mainly includes two types of synchronization signals and video signals. Among them, because the video signal itself contains a wealth of useful information, and is not encrypted during the serial transmission process, the driving current is large, and the exposure space is large, it is easy to be intercepted and reproduced, and it is considered a "red signal". In addition, the line synchronization and field synchronization signals are helpful to restore the intercepted information, so they can also be attributed to the "red signal". Therefore, the information processed by the entire display channel system is serial non-encrypted information, with the largest amount of visible informa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/10
Inventor 方坤郑箘王璐静王倞婧贾俊锋
Owner BEIJING INST OF COMP TECH & APPL
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