Monitoring front end and terminal, monitoring system as well as audio/video signal encryption and decryption methods

Abstract

The invention provides a monitoring front end and a terminal, a monitoring system as well as audio / video signal encryption and decryption methods. The audio / video signal encryption method comprises the following steps of: S11, collecting a video signal, and carrying out digital processing on the collected audio / video signal so as to form audio / video data; S12, generating a random private and confidential key, and utilizing the private and confidential key to carry out encryption treatment on the audio / video data formed by digitalization so as to form audio / video code stream; S13,converting the audio / video code current formed by the encryption treatment into transmission code current; and S14, obtaining a public key sent by a monitoring terminal, and utilizing the public key to carry out encryption treatment on the private and confidential key on the randomly generated private and confidential key. The audio / video signal encryption method provided by the invention can improve the safety feature of the whole monitoring system, and the privacy of users can obtain farthest protection.

Description

technical field [0001] The invention relates to the field of security monitoring, in particular to a method for encrypting and decrypting audio and video signals, a monitoring front end using audio and video signal encryption, a monitoring terminal using audio and video signal decryption, and a monitoring system using the monitoring front end and the monitoring terminal. Background technique [0002] With the continuous improvement of people's material living standards, the security monitoring system has gradually entered the contemporary stage. The security monitoring system in the prior art usually uses optical fiber, coaxial cable or microwave to transmit video signals in its closed loop, and constitutes an independent and complete system from camera to image display and recording. It can reflect the monitored object in real time, vividly and truly, not only greatly extending the observation distance of the human eye, but also expanding the function of the human eye. It c...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is that the video surveillance system in the prior art generally adopts a relatively simple call control process, such as using a self-defined call establishment command, which does not fully consider the security of the video surveillance system; or increases user authentication, Set up a server at the remote monitoring end to store the user name, password and other information of the registered user, and only the designated user can call the local monitoring end; or after the audio and video multimedia information is encoded, many network monitoring does not have the audio and video multimedia data Encryption processing or only simple encryption processing, personal privacy is difficult to be guaranteed, a monitoring front-end and terminal, monitoring system and audio and video signal encryption and decryption methods are proposed

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