Cross-network video transmission equipment

Abstract

The invention discloses cross-network video transmission equipment which is characterized by comprising an audio / video signal transmitter, an audio / video signal receiver and an internal network videointerface, wherein the audio / video signal transmitter comprises a remote camera and a network module A and establishes one-to-one connection with the audio / video signal receiver by virtue of an address code of the remote camera. The transmission method comprises the following steps: adopting a video coding technique, transmitting public network audio and videos to a private network or a local areanetwork after coding completion by virtue of multimedia uncompressed video transmission, performing code conversion to obtain an Onvif protocol, synchronously transmitting video pictures of the remote camera, and keeping synchronous transmission on two physically isolated networks. According to the cross-network video transmission equipment disclosed by the invention, the problems in the prior art that picture quality compression losses are great during video transmission and audios cannot be transmitted are solved under the condition that the internal network is absolutely safe, cost input of multi-network video monitoring construction is reduced, and the working efficiency of storing and managing internal and external videos in a unified manner is improved.

Description

technical field [0001] The patent of the invention relates to a cross-network video transmission device, in particular to the cross-network transmission of video surveillance signals in the security field. Background technique [0002] At present, digital video surveillance has been widely popularized and is an important equipment in the security field, which greatly facilitates people's control of key areas; however, the audio and video surveillance involved in the government, military, and public security is generally based on private networks, intranets, and local area networks. There are also some remote areas where non-confidential videos are transmitted through wireless networks or public networks; since the private network or intranet involved is a physically isolated intranet, the so-called network physical isolation refers to two networks that are not connected to each other and have no physical communication The relationship is completely disconnected, the public n...

AI Technical Summary

Problems solved by technology

[0002] At present, digital video surveillance has been widely popularized and is an important equipment in the security field, which greatly facilitates people's control of key areas; however, the audio and video surveillance involved in the government, military, and public security is generally based on private networks, intranets, and local area networks. There are also some remote areas where non-confidential videos are transmitted through wireless networks or public networks; since the private network or intranet involved is a physically isolated intranet, the so-called network physical isolation refers to two networks that are not connected to each other and have no physical communication It is completely disconnected, the public network video cannot be connected to the intranet, and the use of firewalls or other technologies cannot achieve complete physical isolation and transmission, resulting in the separation of internal and external video monitoring and separate construction, which is more troublesome to use and manage

[0003] At present, for cross-network digital video transmission, it is mainstream to use firewall technology and gatekeeper technology to isolate, but firewall technology cannot achieve complete physical isolation, and gatekeeper technology transfers data through switching methods, which will cause delay and lose real-time video However, some other existing technologies use a relatively simple combination of several devices to decode data into VGA or BNC for data transmission, which cannot meet the synchronous transmission of high-definition video and audio. At the same time, through VGA or BNC encoding and decoding, video The picture quality is seriously attenuated, and the audio cannot be transmitted synchronously

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