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Technical Analysis report of Video Management Software (1)-- Overview

2025-02-23 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >

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Shulou(Shulou.com)06/03 Report--

1. Overview of VMS

   video is a signal sequence with time continuity, space and color distribution, which is designed and generated on the basis of human visual perception. In essence, from a data point of view, video is a kind of specially organized data; sometimes it is called optical imaging, and video is also called image; in the sense of transmission, video signal is also called video stream and media stream.

   video is an extension of human visual ability, and it is an intermediary for human beings to maintain contact with all kinds of objects and events in human visual observation space.

   video is the foundation of video surveillance system. Video surveillance system is an integrated system with the functions of information collection, transmission, control, display, storage and processing in a certain space with the comprehensive application of video and audio coding and decoding, communication, computer network, system integration and so on.

   benefits from the development of the following technologies, IP video surveillance technology has gradually replaced the traditional analog monitoring technology and become the mainstream of the market:

The development of IP network technology: IP network technology has been widely used in telecommunication network. From the softswitch technology of the communication core network to the network layer of the wireless communication network, IP protocol is used. What's more, due to the vigorous development of the Internet, "Everything over IP, IP over everything" has become a popular phrase in the industry. The development of digital video and audio codec technology and network camera (IPC): with the wide application of video digital compression codec standards such as H.264 MPEG Mur4 and G.711 fear G.726last AAC, high definition video technology has gradually become the first choice of video surveillance system. Media stream transmission based on IP technology, control protocol is applied to the bearer and transmission of digital video signal. IPC has also become the mainstream video capture equipment in the video surveillance system. The development of the Internet: IP-based Internet technology makes the exchange of information more and more convenient, the development of the Internet has also promoted the development of cloud computing and big data and other technologies, these technologies are gradually affecting the development of video surveillance system.

   VMS (video management software Video management software) is the software for operating and managing video data and equipment in the video surveillance system, and it is the intermediary for the interaction between users and video surveillance system. Unless otherwise stated in this report, VMS refers to the software in the IP video surveillance system.

   such as the video surveillance system in figure 1, video management and storage software on PC, remote access control on remote terminals, and video browsing software are all part of VMS.

   VMS is the core software of the video surveillance system, and the deployment scale of VMS is the same as that of its video surveillance system: for a community video surveillance system centered on NVR, VMS may be the software embedded in NVR; for a safe city video surveillance system containing a large amount of IPC, VMS may be deployed on a cluster with multiple servers. 2. Functional features of VMS

In terms of basic functional features of   , VMS focuses on "management" and "operation".

Management function

   a video surveillance system is a complex system that integrates a series of entities, such as video capture unit, video transmission network, video display unit, video storage unit, video codec unit and so on. The management function of physical and logical entities in the system is undertaken by VMS.

The management function of    VMS for physical entities in the video surveillance system is equivalent to that of the network management system for telecommunications equipment in the telecommunications network. VMS can manage the configuration data, performance, state data and events generated by physical entities in the video surveillance system.

The management function of    VMS for logical entities in video surveillance system is equivalent to that of domain information and knowledge in information management system (MIS). VMS will produce a lot of information in operation, such as video files, video file directory information, user information, control rights information and so on. VMS needs to manage these information to maintain the normal operation of the system. Operation function

   video data is the core of the video surveillance system, and the most transferred data in the communication network of the whole video surveillance system is the video surveillance data. Around the core of "video", video capture, video codec, video transmission, video storage, control of related video equipment (IPC PTZ control, TV wall display, etc.) these operation instructions are issued by VMS, authorized users can complete the operation (control) of the whole video surveillance system through VMS UI.

   with the continuous development of video surveillance system, VMS not only completes the basic functions and features, but also continues to diversify. VMS integrates with other information systems in the field of video surveillance to provide users with more rich experiences. 3. Technical characteristics of VMS

   VMS converges with other information systems and presents the following technical characteristics:

Openness

The devices and units in    video surveillance system may come from different manufacturers and have different characteristics and access methods. VMS should have good development (compatibility) and can manage and operate all kinds of heterogeneous devices. Expansibility

   VMS should have good extensibility, like the "open-closed" principle in object-oriented design principles. When adding or decreasing physical or logical entities in VMS, the normal business of VMS should not be affected, and other entities that have nothing to do with adding or deleting entities should not be affected. Unity

   video surveillance system is a very typical regional distributed system. For large-scale video surveillance systems (such as provincial and municipal Ping an City Video Surveillance system), thousands of monitoring points and monitoring equipment are connected, the function of VMS may be very complex, and the deployed servers may be distributed in different areas. But for users, when using VMS, they should only enter through a unified entrance, and all the management and operation functions of VMS can be completed in one site. VMS should provide users with the experience of "one-stop service".

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