Video integrated centralized control system of low power design principles (1)

The deployment of large-scale video challenge of integrated management system

As the video surveillance system big strides to mass distribution and application of orientation to promote socialization, IP-based, high-definition technology, intelligent technology development trend for video surveillance industry into a new period of transition.

In the traditional analog video monitoring system for the implementation of large-scale upgrading of the process, in the new video surveillance system architecture design selection process, the user not only to image sharpness, real-time performance, reliability, and ease of use make the increasingly demanding requirements, also for equipment manufacturers and systems integrators offers energy-saving, efficient and environmentally friendly system for comprehensive consideration of the request. If the have the same characteristics and prices of the two products, the user must select the lowest energy consuming products aimed at achieving the Green environmental protection.

A complete video surveillance system including the front-end acquisition, intermediate transport, back-end display management and storage, and other major sectors, is responsible for the back-end management of devices displayed is the core of the entire system controller hub.

Whether a node to form a single system, or multiple nodes of the cluster system, be it analog video access, digital video access or blend access, only the modulus through backend display management equipment to distribute the deployment image resources together and form a human-machine interface. This video integrated centralized control of the central role as each system is indispensable for the soul, since the system architecture of the complex and ever-changing, in particular the need to address analog video and digital video integrated access problems, specific constitute the richest also involves receiving optical transceiver, network video decoder and matrix switching controllers, hard disk recorders, management servers, disk arrays, and other devices. As responsible for the front-end acquisition cameras/speed dome and is responsible for the intermediate transmission cable Fiber relatively low energy loss, thus reducing power consumption, improve energy efficiency, promotion of compressed comprehensive cost goals are placed in the back-end display management link, the prevalence of such equipment for several types of problems:

1. low level of integration, deployment trouble

Currently on the market existing scale large analog video access systems, back-end display management devices are configured with a matrix for all video overall fast browsing, real-time display of non-compression and immediate control.

1 256 input 32-channel output matrix, mostly to configure two more large card type chassis, but also to an external CPU controller and code Distributor, etc., not including DVR/video distributor, it already takes nearly 1 standard rack space. More than a single chassis video capacity requires different chassis between multiple CPUs to work between cells, and more substantial connection between the chassis video cable, easy to introduce signal interference and instability. If you use embedded DVR video Plus Digital decoding matrix, or the network video codec, you need to configure a large number of network resources, system reliability/stability vulnerable, operation and maintenance costs more.

2. expand the difficulties confined to evolution

Current video surveillance systems, analog SD analog CVBS, high-definition digital SDTV SDI, D1, digital high-definition 720P etc video format diversity, to the users system evolution of uncertainty and high cost of equipment upgrades.

In addition to the analog video signal of two class belongs to the international common criteria, you can directly use conversion, digital video signal at present is that each manufacturer has its own compression algorithms and standards, it is difficult to compatible, causing the device to replace the obsolete, take up storage space and pollute the environment. Even for video switch control of analog matrix, there are structural design limitations, such as each feature card can only be placed on the back panel fixed slot, not flexible combination, but in addition to the video input and output modules can be extended for the system expansion to add new features.

3. high power, high emissions

In the past, and most other variables (speed/performance, cost, cost, time to market system risks) compared to the power consumption are often at a lower priority.

However in today's market, in the design of the decision-making process, the power consumption has become a very important part. For example, in each year for all types of monitoring center spending hundreds of millions of dollars in electricity tariffs, 25% of the costs are directly attributable to the system of large-scale equipment and various server power supply, and 50% of costs for the cooling system and power supply fan, etc., to eliminate operational equipment to produce heat. Moreover, even a small monitoring center every year since the device running and 20 tons of carbon dioxide emissions.

Integrated control system for video with low power consumption and high efficiency principles

1, high density, compact design

Reduced control management device number and volume of composition, not only can reduce system power consumption, but also to the compression space.

Such as hard disk recorders from early gongkongshi DVR to subsequent embedded DVR, from the installation compact card to 16 CIF and even current 16 D1; such as hard drive capacities from three years ago 80G to 1T become mainstream; such as matrix switch controller, from early single chassis 192 in 16 out of the industry's leading single-chassis 256 into 64 out, as well as for car/meeting room application launched in 1U chassis 32 to 16 out of the industry's most compact small system; for example, optical transceiver from point to point to point of single fiber optic 16-way, and the node type/convergence-optical system.

High density compact structural design allows the same space to accommodate more video access, the same power consumption provides better picture quality, the same video index takes up less bandwidth, and disk capacity, same system equipment cost less cost.

For example, a 256 into 64 out of large intelligent network matrices, video input and output modules-weight does not exceed 1kg, matrix full configuration weight does not exceed 25kg, full-load consumption only 90w, compared to previous generation analog matrix, weight reduction of 70%, 85% reduction in power consumption. In addition, because the CPU unit/code distributor/power modules, all built-in to reduce electricity demand matching equipment, high integration and high integration also substantially improves the system installation deployment speed, regardless of the number of chassis, multiple devicesMutual connection and repeatedly setting. High-density 7U rack-mountable chassis reduce room/cabinet space requirements, saving the user resources (shown in Figure 1).

2, modular structure, flexible expansion

Video surveillance system depending on customer needs and technology implementations, is divided into several functional modules, including: audio and video switching, front-end cloud lens control and alarm acquisition linkage, digital video storage, network, remote transport and forwarding of data transfer, etc.

Each functional module after years of development, has become a separate industries and product lines. Each device for different functions, up to a different role to meet the needs of users relatively independent, so the design into different functional boards and hardware structure, chassis size specifications and appearance of the craft also varies. But overall an increasingly competitive environment and focus on the industry trend of solution, you must consider how to integrate a number of different categories of products, to provide users with high integration level, use the convenient, efficient operation and maintenance of integrated products, systems, and in response to price competition, must implement cost compression and quality control of industrial requirements. Even for the same products are also faced with a product assortment yield less hardware structure varies, card chassis, closed cannot guarantee the standards of low efficiency. The modular structure of design has become the most effective means of resolving.

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