Monitoring control platform is the control center for video surveillance, but also a bridge connecting the front and rear-end products, but also for the development of video surveillance is very important. Currently monitoring platform market has the following problems: the lack of a healthy environment for development. Heavy hardware over software. Many software manufacturers and engineering companies regarded as hardware sales supporting ancillary products can be used on basic positioning on the line. Knowledge in product planning and technical breakthroughs, lack of long-term investment; does not promptly respond to user needs, the lack of intrinsic motivation; monitoring and management platform development environment immaturity, lack of appropriate living environment. Monitoring and management software is difficult to form industrialization. Many professional software companies rely on large-scale projects to meet user demand as the core, a lot of R & D resources by investing escalating create tailored software systems for the project, technical barriers and closed to form a monopoly, resulting in difficult interoperability and replacement of similar products ; foundation is weak, the lack of experience. Since most security vendors starting from hardware, software, lack of genes from the top-level design to modular development, lack of overall planning and project management, we can only be responsible for video access, forwarding, storage and other parts of the software development, third-party software development company responsible for the development of other business functions.
, The above problems, we believe that supervisory control platform should look towards several directions: a standardized docking, the security industry's most front-end equipment standard protocols and interfaces are consistent, long-term platform for software developers need to communicate with these equipment manufacturers rolling upgrade equipment in order to ensure smooth access, which virtually increase the technical difficulty and cost of platform development, resulting in difficulty increasing popularity of platform software applications. With mandatory GB/T28181 standard, SIP signaling communications technology has become the main platform for common security monitoring protocol that can protect network communications interoperability. It uses open standard video coding standard, the video stream to remove the maker private content. From the point of view of market trends and technological concepts, based on national standards GB/T28181 networking implementation is one of the standard enterprise focus, which defines the framework for networking and interaction processes, but some of the features and technologies yet to be clearly improved; 2, standardization extension of the monitoring system they use phased construction, the number of camera systems and storage capacity are increasing year by year, the new needs of users are constantly raised. Adding new features to the system is bound to bring changes to the original deployment changes. How to efficiently and reliably adjust the configuration of the system architecture, how to make rational economic expansion program, modular platform structure can solve such problems through video middleware technology for each functional unit designed standardized interfaces, to achieve flexibility can 3, standardized integration of road monitoring, airports, ports, financial institutions, large buildings and other key security sector, the need to consider video surveillance, access control and burglar alarm system of unified management, to achieve integrated linkage of the entire system; scalable deployments. Build a comprehensive integration platform usually two modes, one is the software platform integrates various subsystems in the device directly access layer, which requires specially developed for other security equipment, business functions in an integrated platform. The other is the internal business functions of each subsystem by a dedicated software implementation, cross-system business logic was implemented by the upper platform software, each independent of each subsystem can play good advantage, while the integrated platform also has a good post synergy. Either way, all of the integrated docking devices and platforms, software and platforms made of standardized requirements.
Security cable to connect the entire system is the key, is known to be the blood system, so wiring problems in the monitoring system installation will affect the operation of the whole system, security monitoring wiring understand common problems, effectively guaranteeing the stable operation of the monitoring system. First, cable specifications, routing and location should meet the design requirements, the cable must be arranged in neat appearance, do not damage the skin; Secondly, contacts, solder joint reliability, connectors firmly to ensure effective transmission of the signal. Maximize the use of the entire wire, to avoid transit; If the actual needs of the cable length is longer than the total length of the cable should Yasumasa multistage indirect continued solid and reliable; cable system should be number, cables should be properly label head complete, legible, easy to erase. Numbers should be consistent with the drawings, by number 1 should be able to find out the name of the cable drawings, specifications, and always point; wiring should make full use of the trench, bridge and pipeline Bureau, which simplifies cabling. Do not advocate Buming line, if not Buming line, should pay attention to subtle, beautiful, original space should be left to the maximum position, in order to facilitate future installation of other equipment. L Two wall traces the best selection of decorative PVC trunking; traces near the ground or equipment should use the appropriate channels or tubes, to ensure safe and reliable; laid in the trench, bridge cables must lashing, lashing after the cable should be mutually close close look straight neat, evenly spaced line deduction, elastic adapt, try to be consistent with the style of the original alignment;. laid under the floor and ceiling wiring applications L retardant material tank (tube) placed, although most shun straight, less cross; security monitoring system used by the line feed-retardant materials should be used; insulation should be selected according to the environmental conditions. PI-il, interference-IIIii, corrosion resistance, which adhere to the requirements of the cable; For susceptible to electromagnetic T "scrambled signal lines should be shielded cable, pay attention to proper grounding of the shield during installation; signal lines and power lines should be separated from laying; signal lines should be kept away from the easy to produce electromagnetic interference did not prepare or cable; outdoor overhead lines when lightning protection measures must be taken at the side of the device; during installation to avoid Xiao is sure a good grounding.
"Big data or said massive data, massive data, big data refers to the amount of data involved is huge to not artificially achieve the interception within a reasonable time, management, processing and finishing becoming a human can interpret the information . "Wikipedia definition of big data will explain the characteristics of big data was very clear:" massive "and" unstructured. " At present, most of the video file systems are based on the way the file system to store audio and video data. The main problem is that the file system: Storage device management interfaces are not unified management and distribution system and storage resources. To the file system as the core data storage often appears in two questions: 1) file system easily damaged, can cause frequent file write file system metadata area continually updated, so the file system metadata area is easily damaged, resulting in the file system unavailable; 2) performance problem: IO through the file system via the operating system package, in the case of prolonged continuous data writing, the cost is greater than writing directly to the bare disc, reduce performance. The presence of a large number of video files on the disk, video retrieval system efficiency will drop a lot. In addition, a large number of files on the disk after deleting rebuilt several times, the data on the physical location of the disk becomes discontinuous, leading to the randomness of the data written to increase, thereby reducing the write performance of video data. Basis vectors are stored as image data and video alarm event recording, the importance is self-evident, storage requirements are not only one or a few devices only, it elevated to a solution platform height. Simple accumulation of large capacity, high concurrency video surveillance system is not stored in the storage device, but the need to address the completeness of monitoring business featured storage mechanisms, as well as storage standard time (stored in the data processing speed) and space (storage capacity) on meet the requirements of large-capacity, high-concurrency applications such as large data storage architecture of the monitoring system can be used on such issues. "Cloud storage" There are many definitions, we recognized basic functions: automatic on-demand service, resource pooling, rapid and flexible, broad network access, etc. Cloud storage is configured virtualized storage and related data services provided by the network, the service level is needed to guarantee. The first meaning of cloud storage network, early cloud icon indicates that the network, which is the origin of cloud storage. "Cloud storage" actually help the concept of network, it covers a part of the network, including; Another implication is that it's services, virtualized storage, providing storage pool, shielding all the details of a single storage device, providing traditional storage difficult to achieve on-demand service.
Pickup is used to capture the live sound of an accessory A by receiving sound vibration, acoustic electric sound amplification equipment. Chinese audio surveillance in the security core component, which has a great influence on the stability of the monitoring results. Currently, there are audio pickups security monitoring in the three technical problems: slow for a long time audio monitoring technology development, noise processing difficult. Vocals and noise after amplification is easily confused with, even if it is installed on the pickup also heard the noise, audio monitoring did not achieve its purpose and meaning. Noise pickup two issues need to be addressed, one is to reduce noise from the circuit itself, the second is to reduce interference from ambient noise. The circuit itself is relatively easy to solve the noise, environmental noise problems are more complex and difficult to resolve. Low levels of ambient noise can be monitored automatically by feedback inhibition and noise, this technique can inhibit some of the environmental noise. However, under strong noise environment roads, to reach higher requirements must also be a means to further the use of DSP noise suppression. The most advanced voice noise noise reduction algorithm can only guarantee about 20dB less distortion in the case. Environmental noise is unavoidable, but you can choose a better noise pickup with noise reduction. We also have such a product, such as digital noise pickup. For noisy environments, we recommend users to buy relatively expensive price point pickups. Are many different kinds of noise interference, such as AC interference, shielded cable that can solve part of universal access, but can not be completely ruled out, interference lines can also be used; recorders are also many problems, mainly that some manufacturers do not pay attention to audio quality, leading to late The sound quality is poor, capture cards, too, this time on a dedicated network for cameras designed pickups, the recording would be better needs; Also note that the user wants to check whether the speaker and microphone too close, the speaker Sound pickups will lead to howling feedback, try not to test in the same room. Remote audio monitoring difficult. From the physical principles of sound propagation in the air we know, most people speak mostly in the 50 db sound intensity, propagation distance of about 30 meters. The noise is essentially a busy highway at 60 decibels, voice can easily be "drowned", which is why we will be increasing voice in a noisy environment, so the other party can hear. However, the people's voice to sound energy spread 100 meters away has become 0, zoom is useless anyway, plus environmental noise are mixed together, speech processing difficult. Laser pickups can hear the distant sound of solving the problem, but the high cost, poor quality, pointing to strong, not in large scale in the field of audio monitoring can only be used in the forensic field. Good pickup expensive. Microphone pickup as a key component, and its performance directly affects the quality of the sound. Poor microphone cost a few cents, the price of thousands of good microphone. To get better sound quality you must use high grade microphone, while its costs accounted for more than half of the total cost of the pickup. Coupled with the high cost of back-end noise processing DSP chip, so the price has been high-end pickups. This is why Kara OK Microphone few hundred dollars, but why use CCTV announcer on the price of 10,000 microphone.
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