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What's Next in Video Recording and Storage?

What's Next in Video Recording and Storage?

Editor / Provider: a&s International | Updated: 5/18/2012 | Article type: Tech Corner

- Simplicity and cost-effectiveness are big selling points for NVRs.
- One possible solution of fluctuating bandwidth is auto streaming.
- A rise of hybrid systems will precede entire VSaaS and cloud systems.

How will current recording and storage solutions be affected by trends such as VSaaS and megapixel/HD cameras?

Stand-alone NVRs will continue to thrive in low-cost environments, such as independent retail stores and SMBs, said Jeff Whitney, VP of Marketing at Intransa. “Their main benefits are cost, simple functionality and setup. Preconfigured systems, especially those that include cameras and cabling, will continue to take up much of this unsophisticated market segment.”

In installations with larger channel numbers, NVRs and servers should aim to complement, not compete. Simplicity and cost-effectiveness are big selling points for NVRs. As NVRs continue to evolve to incorporate more channels, features and integration capability, Ricky Law, Sales Engineer at Ensec Solutions, believes that NVRs are in a good position to increase market share.

On the other hand, if servers find a way to simplify the installation, configuration, operation and maintenance process, they also have good growth potential. “Centralized, server-based systems, with external IP-SAN, will continue to grow through the end of the decade, because of increased scale, reduced project costs and simplified multisystem management capability,” Law said.

HD
Megapixel and HD cameras have increasingly significant implications for video recording and storage. “The trend toward higher resolution will continue to impact the storage market over the short-to-medium term,” said Sam Grinter, Market Analyst at IMS Research, in a prepared statement.

One big problem facing solution providers is to ensure quality, remote megapixel streaming. Fluctuating bandwidths may collapse the entire system, warned Kevin Shih, GM of FaceID. One possible solution is auto streaming, which adjusts the resolution and frame rate based on the amount of available bandwidth and the size of the monitoring window.

Improvements in processing technology will also help. “New Intel CPUs are embedding more graphical processing elements and will help increase overall performance, while reducing the costs,” said Florence Shih, GM of Thecus Technology. “Elements such as USB 3.0, HDMI or 10 Gigabits can be added much more easily.”

SSD
Solid-state drives (SSDs) are not commonplace in surveillance applications. More expensive but more dependable, they can be useful in specialized applications within video surveillance. Implications might include more efficient video analytics and video coding, said Lee Caswell, founder and Chief Strategy Officer of Pivot3.

SSDs can also be used in applications where the drives might not be in a secured, fixed location, such as military, railway and police, said Chris Williams, Director for Wavestore.

Cloud
Cloud-based computing and storage are already popular in the IT and home consumer markets, Whitney said. Due to the more conservative nature of security, IP-based video surveillance is moving at a slower pace, but cloud and VSaaS, nevertheless, are emerging as a formidable competitor against on-site storage options. “Globally, vendors are starting to introduce their own cloud-like remote monitoring services. Positioned as a service not unlike the fire and burglar alarm monitoring marketplace, they are extremely simple and low-cost for the user.”

The main barrier to large deployments of cloud and VSaaS is price. Monthly subscriptions currently cost between $5 and $30, depending on the level of service and the inclusion of hardware, according to IMS Research. “The current show stoppers are the cost of powerful WAN connections,” agreed Stephen Beckmann, Video Product Marketing Manager in EMEA, American Dynamics, (a Tyco Security Products company).”

Whitney expects that a rise of hybrid systems will precede entire VSaaS and cloud systems. For example, a simple, local appliance based on commodity server hardware can retain a small amount of video that is then fed into the cloud for central recording, retention and monitoring. “That reduces the complexity and cost of the local system, while centralizing costly security resources, such as storage and operational personal, at a central security operations center or IT data center,” Whitney said. To record and store right, there is definitely more than meets the eye.

Samsung to Promote Smart Security

Samsung to Promote Smart Security

Editor / Provider: Jill Lai | Updated: 5/15/2012 | Article type: Security 50

asmag.com interviewed Tim Biddulph, IP Product Manager, Samsung Techwin Europe about “Smart Security,” promoted at IFSEC 2012 and their road shows around the UK.

asmag.com: The purpose of “smart security” is to ease the difficulty of making the migration from analogue to IP. Could you provide some examples to demonstrate this idea?

Biddulph: Smart Security is a phrase which Samsung has given to a ‘philosophy' which recognises that until quite recently, Video over IP was only perceived as a solution for large projects but that we are now also increasingly seeing the technology utilised in small to medium sized installations. Despite this, for every installer or system integrator who is knowledgeable about network based security systems, there are probably still many more who do not yet know what questions to ask when they have a requirement to specify an IP network based solution. As a major stakeholder in the security industry, we feel it is essential that we share our knowledge and expertise in respect of IP network solutions and technologies with our existing and potential customers. Our Smart Security philosophy is therefore all about how customers, with our help, can upgrade from an analogue system to an IP and network based solution in the smartest way for their business.

asmag.com: For system integrators, what is the advantage of adopting Samsung IP products over other brands?

Biddulph: We now have a comprehensive range of IP devices from cameras to recorders and switches and can therefore offer a one-stop-shop for most projects, but it is not good enough just to have what we believe are ‘Best in Class' products. Customers also expect us to provide excellence pre and post sales support which, with the co-operation from our network of distributors, we are determined to provide.

For installers and system integrators, the advantage of working with Samsung is that we are solution ‘agnostic'. Perhaps this is not totally accurate, as we do firmly believe that a very high percentage of video surveillance systems in the future will be IP network based, but we are in a strong position to be objective when offering advice on the best technology to be used for a specific project. Our product catalogue now provides customers with a choice that includes a comprehensive and competitively priced range of analogue cameras, DVRs and monitors, a complete end-to-end IP solutions range, license-free viewing and recording software and an impressive line-up of high definition megapixel cameras. ‘Hybrid' options include encoders, which provide a cost effective and easy to implement method of adding analogue cameras to an IP/network based video surveillance system, and HD-SDI cameras which allow the transmission of uncompressed and non-packetized Full HD (1080P) video over analogue cabling.

asmag.com: I have noticed that the slogan of “smart security” is only promoted in Europe, especially the UK. Is this true?

Biddulph: The Smart Security philosophy is being promoted throughout Europe. The UK however has been among one of the slowest countries in Europe to embrace the opportunities offered by IP network based video surveillance systems. This is to some degree understandable because the UK has such a large number of existing analogue systems but it is for this reason that the Samsung's UK sales team are currently conducting a series Smart Security Days with the objective of taking the mystery out of installing an IP and network solution. By doing so, we can demonstrate to customers that with the correct advice and guidance, they need not have any fear of embracing what is a truly exciting technology which offers so many benefits, not the least of which is the opportunity to gain maximum advantage from the latest HD megapixel cameras.

asmag.com: Samsung have been the market leader of analogue security equipments. How does Samsung strengthen its capability in IP technology especially in Europe, where many leading IP video solution providers are located?

Biddulph: Samsung has been acknowledged by independent research companies as one of the top three European security brands and although until recently our strength has predominantly been with analogue technology, we now also have a comprehensive range of IP and network products.

One of the things we have done recently to help our customers in Europe and build on the trust they have in the Samsung brand is to accelerate our programme to integrate our cameras, DVRs and NVRs with video management software offered by leading independent software vendors (ISVs). Axxon, Aimetis, Digifort, Griffid, Ipronet, Exacq, Genetec, ISS, Milestone, Mirasys, ONssi and Seetec are now among the list of manufacturers that Samsung has been working with because of their ability to offer ‘open' software specifically designed to facilitate the integration of equipment and systems from different manufacturers. This is to provide customers with the flexibility to choose the perfect combination of security products to match their specific requirements. We recognise that in a tough economic climate, we must ensure that customers achieve the full benefit from their investment in a security system. This means providing customers with the option for Samsung products to be controlled and monitored alongside equipment produced by other manufacturers. Working closely with ISVs is very much a part of our Smart Security philosophy which is primarily about making it easy for customers who are looking for a gradual transition from an existing analogue system to a full IP network based surveillance solution.

Wision Continues to Enhance R&D Strength

Wision Continues to Enhance R&D Strength

Editor / Provider: WiSion | Updated: 5/26/2012 | Article type: China Corner

Wision’s main products are — network real time broadcasting system, megapixel HD network camera, central management software, widely applied in Safe City, enterprises and intelligent buildings.

The company obtains four kinds of software copyrights such as IPNC Search Automatic Search Software V1.0. Thus, Wision becomes National High and New Technology Enterprise. It is honored as “National Hi-tech Technology Enterprise”, which is authorized by China Ministry of Science and Technology Organization.

Wision obtains another nine awards in these aspects, for example, Enterprise Total Turnover, Technology Level, Hi-tech products turnover proportion, R&D Investment, Experienced R&D engineers, Enterprise Innovation System and Activity, Enterprise Quality Warranty System and Products Quality Level, Knowledge Property Right Management Condition, which are awarded under strict cognizance condition and review standard. Apparently, it has won National High and New Technology Enterprise honor by its leading technology and strength.

Since its foundation in 2005, the company has close cooperation with Mobile Video Network Technology Centre of Shenzhen Graduate School in technology innovation, branch of Peking University. It adopts combination of production, study and research to carry forward its development; Transform Hi-tech and patent technology into productivity and keen on R&D on "Internet of Things" technology and application. Wision’s main products are: network real time broadcasting system, megapixel HD network camera, central management software, widely applied in Safe City, enterprises and intelligent buildings.

Tailored Solution — The Way to Stand Out in Network Surveillance

Tailored Solution — The Way to Stand Out in Network Surveillance

Editor / Provider: OB TELECOM | Updated: 5/25/2012 | Article type: China Corner

Over the past two years the development of network surveillance has increased rapidly, many surveillance equipment manufacturers have one question in mind — what should manufacturers do in an IP orientated application? Some believe that storage and the manufacturing process are the main priorities, but from a market point of view, the ability to meet customer demands is of great importance as this is the fundamental element to win market shares for manufacturers.

Network surveillance technology has become a core information system for the security industry, what is driving this development is information and knowledge of the security industry. Although technology is becoming mature and numbers of IP-based projects are increasing, market application has not been smooth for manufacturers as there are many problems to offer a solution. However, increasing applications lead to varied demands, in order to penetrate this market, how to satisfy different needs is important.

Diversified Market Demands
Within the security industry, customer demand is often neglected by manufacturers. The most common case is manufacturers often design a solution which has a whole host of new functions, but what they have forgotten in the process is what customers actually need.

Therefore, entering into the IP era, understanding and grasping customer demands and releasing customized products are a must for manufacturers. Although there are diversified demands in the market, these can be divided into the following three situations as illustrated in figure one.

Firstly, different standards have certain requirements for images. For example as stated in figure one, broadcasting standards and video standards by national transportation department are very different, the figures below represent an image quality measurement index. These figures suggest that even though both are video signals due to different standards, the results will differ.

Secondly, different vertical market leads to different image requirement, e.g. Safe City and Highway. Currently, in Safe City projects, there is no specific testing criteria while Highway testing criteria are a must-have. Another example is for intelligent transportation projects as it requires capturing higher resolution images of license plates. In intelligent transportation projects, real-time is another critical issue while in Safe City projects, latency is less demanding.

Thirdly, in some cases, despite the same standards and applications, image demands may differ to customer needs. It is because some end-users choose products based on their preferences or products, themselves, are unable to meet end-users' requirements.

Conclusively, tailored video solution is required for different vertical markets. This is, for device providers, an opportunity as well as a challenge. To satisfy customer's demand will be the strategy to stand out among other manufacturers.

Customer Satisfaction
If a product provider wants to enjoy greater market share, its capability to provide customized products will be the main issue. There are several technologies and solutions which can ensure customer needs are met for video surveillance. For example, the traditional analogue, network video technology, high definition, HD-SDI as well as GigE Vision.

To date, IP draws most attention as it brings scalability and large-scale networking management. In comparison to the traditional fiber optical transmission system and analogue matrix, IP simplifies the whole system setup and is available for networking. Besides, IP also offers different compression algorithms, such as H.264, MPEG-2 (broadcasting) and JPEG (used in intelligent transportation).

Although there are many advantages of IP, there are also fundamental problems — delay and loss of image. In some applications, uncompressed images are required and some analytics function may not well incorporate with compressed video images. Therefore, these create further problems in the future.

The bandwidth and unstable systems continue to trouble end users and manufacturers. On the contrary, these problems can be an opportunity for companies due to the market becoming more concentrated. As the high definition becomes more obvious, some companies have released new high definition solutions such as HD-SDI. This supports high speed and, basically, zero latency in transmission. This provides conventional analogue system to embrace high definition based on its existing wiring, which saves time and cost. To installers, they do not require IT background.

Basically, IP and HD-SDI both have their advantages but these two are not enough to cater all demands. In the future, HD-SDI and IP will both exist based on different applications. Furthermore, some manufacturers offer GigE Vision for those who wish to use network technology and still retain image details and real-time transmission. Created by Automated Imaging Association (AIA), the GigE Vision technology is based on a 1,000 megabyte Ethernet, which is mostly used in scenario with a 10-megapixel or above camera.

Different technology and standards require development and customization in order to satisfy customer demands, as the market develops both will oexist for a long period of time. Employing the correct technology and standards to fulfill clients' needs is the way forward to maintain customers and arket

HD Surveillance Enhances Safety at Stadium

HD Surveillance Enhances Safety at Stadium

Editor / Provider: a&s International | Updated: 5/15/2012 | Article type: Commercial Markets

- Megapixel is attractive because large crowds can be monitored with fewer cameras.
- Response time is important for a stadium or sports events

Video surveillance has been deployed in stadiums to monitor large crowds and areas, as well as zero in on incidents according to needs. In recent years, advances in imaging are allowing megapixel cameras to be deployed in stadiums.

Megapixel is attractive because large crowds can be monitored with fewer cameras. The high definition (HD) means fine details can be captured. Additionally, megapixel cameras can investigate small events without losing sight of the overall crowd at the same time. “HD surveillance is extremely effective at large stadiums with large crowds and areas of coverage,” said Keith Marett, VP of Marketing and Communications, Avigilon. “We can achieve complete coverage of these large areas with fewer cameras and fewer staff, which means lower installation and management costs. In fact, we can cover 50,000 spectator seats with facial detail using only 14 of our cameras.”

Cameras watch for fan disturbances, such as fights and disorderly conduct in the stands, or unusual activity in the hallways and parking lots. It can be used to monitor concession stands and service staff to ensure they are complying with health and safety regulations. Surveillance can also be used to settle disputes or complaints that have been filed against staff, or to catch employee theft. Deployment of video surveillance should consider the various environments in and around stadiums and how to deploy cameras effectively.

A stadium in Peru deployed cameras for identification. PTZ cameras were installed at the entrances to capture attendee faces with facial recognition. Cameras had to be installed properly and lighting had to be controlled so that faces would be captured clearly across different entrances. Combined with a facial database of previous stadium offenders, this allowed operators to respond when troublemakers entered the stadium. “If a guy comes into the stadium and causes a fight, you book him,” said Aluisio Figueiredo, COO, Intelligent Security Systems. “The next time, there's a very good chance that he will be detected at the entrance. Once he is in, the police are going to be dispatched.”

Response time is important for a stadium or sports events. The purpose of security in stadiums is twofold: first, security does all it can to prevent dangers and threats from entering the stadium, or subduing threats within the stadium. Second, if an event has occurred, security must deploy resources to respond to the threat and control the situation. This requires immediate response. Many VMS platforms now incorporate features that will help catch perceived threats.

“A typical challenge in the stadium setting is having security personnel react fast enough to an event,” said Marett. “With video surveillance software, security personnel can use many search options that will tell them instantly if something has happened or changed and be able to react to it in seconds. For instance, if a child wanders away from his or her seat, security personnel can conduct an object-change search and see in seconds where the child is.”

Some stadiums may choose to use hybrid systems, to maximize analog security investments. PTZ dome cameras can be controlled with matrix switches for use of existing equipment. “By using direct control, integrators can guarantee video quality and real-time PTZ control of the cameras with no noticeable delay between the time operators move their joystick and the time the camera responds,” said Nathan Needel, North American VP of Sales, Infinova.

When connecting separate buildings in a sports venue, a central matrix in the control center can link independent surveillance system matrices found in each facility. “Thus, using a regional networked surveillance schema, the system can work independently at each noncentral matrix location yet cooperate with other subsystems to create a complete surveillance system,” Needel said.

Arecont Vision Megapixel Cameras Protects Merck's Mexican Laboratory

Arecont Vision Megapixel Cameras Protects Merck's Mexican Laboratory

Editor / Provider: Arecont Vision | Updated: 5/11/2012 | Article type: Commercial Markets

Ensuring that all activity and incidents are captured on video with detailed high resolution clarity, Merck Pharmaceutical S.A. De. C.V. has installed an Arecont Vision megapixel technology solution at their new facility in Mexico. Located around the perimeter of the building, Arecont Vision's 5 megapixel day/night cameras produce superior images in both daytime and evening lighting environments.

With the megapixel IP cameras, operators can zoom in on specific areas of live or archived video to see important details such as a license plate number or a face. The cameras can output multiple image formats, allowing for simultaneous viewing of full-resolution field-of-view and regions of interest for high-definition forensic zooming.

“The quality of the megapixel video image is what sold us and the customer,” said Marco Godina of Alarmas Universales, the system integrator. “Once we saw the images from Arecont Vision cameras, nothing else we looked at even came close in comparison.”

Mr. Godina also notes that the Arecont Vision megapixel IP cameras provide better overall coverage with higher resolution for superior picture quality.Utilizing megapixel cameras facilitated system design with broader coverage while using fewer cameras. The day/night version of the camera used at the Merck facility incorporates a motorized infrared (IR) cut filter and 12VM1040ASI (10mm – 40mm) zoom lens.

Selection Criteria for Panoramic Cameras

Selection Criteria for Panoramic Cameras

Editor / Provider: a&s International | Updated: 5/11/2012 | Article type: Tech Corner

- An important step is to buy or borrow one and test it prior to large-scale deployment
- Check to see how many video streams are coming out of the camera, as well as total bandwidth and storage requirements.
- The biggest question concerns the true resolution and performance of lenses, since they impact not only panoramic and 360-degree cameras.

Before purchasing, users should always review the data sheet carefully, William Ku, Director of Brand Business for Vivotek advised. “Because these cameras are different from regular cameras, you need to consider if the cameras can fit in the total solution.”

More VMS include dewarping for single sensor 360-degree lens image, whereas few VMS solutions perform stitching, Joel Schaffer, PM of Video Surveillance Applications at Immervision added.

If the manufacturer provides actual camera footage, users should check if it fits their specific needs, since the quality will vary greatly, Ku continued. “Finally, an important step is to buy or borrow one and test it prior to large-scale deployment to make sure the image quality is appropriate, the recording and live viewing work well and the processing power and bandwidth consumption are acceptable.”

Pixel density should also be examined to see whether it fits the user's needs, Ellen Cargill, Director of Product Development for Scallop Imaging (a division of Tenebraex) said. “Also check to see how many video streams are coming out of the camera, as well as total bandwidth and storage requirements."

Other considerations are ceiling height, distance from interest and monitoring objectives, said Patrick Lim, Sales and Marketing Director for Ademco Far East (an Ademco Security Group company). “Does the camera have enough resolution to do what is needed? Once the area of interest becomes too big, information will be diluted and even with 360-degree cameras, you may end up not seeing what is needed.”

The biggest question concerns the true resolution and performance of lenses, since they impact not only panoramic and 360-degree cameras, but all megapixel, said Dave Nieweg, VP of 3xLogic. “No one realizes the limitations of cheap lenses, and there is no easy way to qualify or measure true lens performance or resolution, so everyone is in the dark.”

Few fisheye lenses have resolution above 2 to 3 megapixels at most, Nieweg added. “People understand lens differences when they buy eyeglasses, and they spend more to get better quality optics. Many people in the security industry overlook these things. They buy an all-in-one, 360-degree camera with a poor quality lens and so the picture sucks. Then they think 360 is a bad idea.”

However, a 360-degree lens is only one piece of the solution. “The technology behind dewarping the image is more important than then the hardware,” said Richard Pineau, CTO at Oncam Global. Customers should also be wary of high frame rates.

For panoramic cameras, manufacturers that do not stitch together the individual sensors inside a camera often claim a frame rate that is actually the number of sensors multiplied by the individual sensors' frame rate, Cargill said. “Thus, magically four image sensors running at five fps each becomes a ‘20 fps' camera.”

Frame rates of 25 fps from the analog world are no longer necessary, said David Myers, CTO at AMG Systems. “The ultra-wide 360-degree field of view makes it unlikely, even for fast moving objects, to escape undetected. 12 fps is more than enough for live viewing, while 4 fps is perfectly normal for high-resolution recorded streams.”

Another area of exaggeration is low-light performance. When manufacturers with good reputations claim a certain lux level, they measure the ambient light in a scene, Cargill said. “However, what many low-light camera manufacturers claim is the lux level at which their sensor can first detect a minimum signal over pure black, not a level at which you get a usable image without auxiliary lighting. Hence the absurd claims that cameras have low light capability of 0.001 lux, which is darker than an overcast moonless night under a forest canopy.”

Furthermore, customers should always ask at what frame rate or exposure time they are getting to achieve that performance. “Everything is a tradeoff. If someone offers you something magical for no cost, something was lost,” Nieweg said.

Myer, Australia's largest department store group declares the game is up for shoplifters

Myer, Australia's largest department store group declares the game is up for shoplifters

Editor / Provider: Geutebruck | Updated: 5/8/2012 | Article type: Commercial Markets

With new security technology operating in its 68 stores Myer, Australia's largest department store group, is telling shoplifters that their game's now up. For more than a year the use of radio frequency tags and a new Geutebruck digital CCTV system operated by well-trained staff has been proving extremely successful in enabling security staff to identify and report known shoplifters, suspicious behaviour and co-ordinated activity among groups of individuals on their premises. The result being that most shoplifting suspects are now apprehended before leaving the premises.

Myer is delighted with this success - even if it did not quite happen overnight. - Selecting the video security system took two years. The retailer's previous video system had suffered from high fault levels and lower than expected performance so this time Myer was determined to find one which would deliver on all its promises. Following several pilot installations, a number of technical shoot outs and a great deal of evidence-gathering Myer's final choice was a system designed and installed by Secom TS and supplied by Geutebruck Pacific, using GeViScope-IP/SE platforms and around 6000 Sony 1.3 megapixel cameras. Myer commended Secom TS on its design work and proof of concept, and judged the Geutebruck solution to excel particularly in its fast and responsive video management and its user functionality, with its quick search and edit tools such as the ‘cut list' and ‘motion search' being particularly impressive.

In operation around the country during recent months the new system has convinced in practice too. Its high quality images enable security staff to identify individuals, and its functionality makes easy work of spotting unusual behaviour - people handling lots of different goods, hanging round for long periods, unplugging items or acting in concert – so that this can be reported to store guards who then shadow at close quarters, making their presence felt before offences are committed.

Besides the system's general high technical quality, speed and reliability, much of the quality and convenience of the assistance which the store security staff experience in their everyday duties is due to a handful of standard system and plug-in functions. One of these is activity detection which triggers alarms and changes the recording parameters to predetermined settings when movement is detected in unexpected locations. Another much used facility is the ‘Follow me' function which allows operators to quickly ‘drag and drop' video of suspicious behaviour from the monitor where it is first spotted, to the central monitor of three on their console. Once there, the video is automatically recorded at high resolution for evidential purposes and retained for reference on a separate database. This ability to freely select and group multiple video streams from cameras all round the store makes it much easier for Myer staff to see interaction or collusion taking place between individuals in different locations.

Besides loss prevention, Myer are finding that video images from the system are valuable for other purposes too. For instance if a shopper makes a claim against a store because of an accident, a fall for example, being able to prove with video images that the store had already drawn the hazard to shoppers' attention and therefore fulfilled its legal obligations, or that the accident did not happen as claimed, can save the retailer considerable legal expenses. Images from one particular set of cameras in each store is available to marketing staff for check display compliance centrally, without leaving head office. Given the vast distances between Australian cities, and hence stores, this useful facility saves travelling time and expense.

HD-SDI or Megapixel Network Camera?

HD-SDI or Megapixel Network Camera?

Editor / Provider: Sunell | Updated: 5/4/2012 | Article type: China Corner

HD-SDI and megapixel network cameras are being widely debated among manufactures, end-users and media. However, which one will be more suitable for future video surveillance system as both HD-SDI and network camera can reach megapixel resolution, and both attract attention in the video surveillance market. This article is Sunell's opinion. The article will analyze and compare these two products from five different aspects, including, capability, performance, cost, ease of use and reliability.

Capability
Network camera can achieve video capturing, encoding, video stream network distribution and storage. Embedded Web browser features video applications and network camera, itself, even supports intelligent analytic functions.Consequently, network camera has all the core features of the video surveillance system. Therefore, theoretically, a video surveillance system can be constructed by only using the network cameras.

Some people might not agree with this: if the network camera can build the video surveillance system independently, what are NVR and VMS for? The reason of NVR's existence is due to storage capacity limitations of SD cards in network cameras, and potential risk of its data leakage. As capacity of the SD card keep increasing and network security technology continues to develop, there will be revolutionary changes of video storage in the future.

The VMS system's main function is to act as a centralized management for devices. This function can be distributed and deployed to network cameras, while CPU performance increases as well as the development of cloud computing technology. Therefore, network cameras are the core in the network-based video surveillance system.

On the other hand, the function of the HD-SDI camera is only video capturing, which is identical to the conventional analogue cameras, the only difference is the image resolution has improved from D1 resolution to megapixels. Hence, HD-SDI DVRs are crucial in the HD-SDI-based video surveillance system.

Performance
HD-SDI camera's advocates emphasize two points — image quality and latency of live video. As HD-SDI cameras' live video has not been encoded, the image quality is better than network cameras' in principle, but this is from a mathematical point of view. Due to the limitation of human eye to identify image details, there is almost no difference between megapixel network cameras and HD-SDI cameras.

As for latency of live video, it basically does not exist for HD-SDI cameras. While for network cameras, the theoretical latency of network cameras at 30fps is 140 milliseconds, and 60fps is only 70 milliseconds. However, in real applications latency of network cameras is normally more than one second because of unstable network. If network camera developers pay enough attention to this problem and can reach the theoretical minimum latency, then there is no difference between network cameras and SD-HDI cameras.

Cost
A transmitter module, which modulating megapixel digital video signals to HD-SDI signals, is needed in HD-SDI cameras, while HD-SDI DVR has a corresponding receiver module which demodulating HD-SDI signals to megapixel digital video signals. This is extra cost for HD-SDI system, but multiple HD-SDI cameras can share one video encoding chip of HD-SDI DVR, while every network camera needs an independent video encoding chip. If it is possible to lower costs of multiple channel megapixel video encoding chips, it will compensate the extra transmitter and receiver cost of HD-SDI systems.

At this moment, the cost of HD-SDI modulating chip and multiple channel megapixel video encoding chips are considerably high, which leads to a non-affordable HD-SDI system. On the contrary, the chip price is based on quantity. The camera which enjoys greater market share would be able to offer a lower price.

Ease of Use
A potential advantage of HD-SDI based video surveillance systems is that traditional surveillance systems can easily upgrade by replacing analogue cameras and DVRs with HD-SDI cameras and HD-SDI DVRs. However, the bandwidth of HD-SDI signal is far beyond the analog video signal. Therefore re-wiring may be needed if the current coaxial cable is not good enough. What kind of potential risk that this problem may cause is still uncertain.

The current society is an information society, all new buildings have considered a layout of information points, and it will become very easy to construct a network-based video surveillance system. HD-SDI advocates sometimes claim the traditional installers have no necessary expertise of IP system. Actually, it is not as hard as they think. A lot of IT providers are expanding to security industry, which will help conventional security system integrators on the network construction. With deeper convergence of video and end-users' information, the system integrators with IP network expertise would show its values.

Some people complain that configuration of network camera is complicated. It is not an inherent problem for network cameras. East of use is the key factor to IT products and it lies in software design. By optimizing the software, this issue can easily be solved.

Reliability
In a HD-SDI based system, it consists of a HD-SDI DVR and several cameras. However, a failed HD-SDI DVR will break down whole system. In a network-based system, every camera is regarded as an independent subsystem, which means network-based system provides higher reliability.

Conclusion
Some DVR manufacturers prefer to support HD-SDI cameras because they wish to maintain the existing DVR market share and product advantage. Those players from IT industry usually prefer network cameras because they expect to optimize their experience in the networking industry. Which is the future, network cameras or HD-SDI cameras? Sunell think it is not necessary to make any final conclusion. What we need to do is to have an open mind on both developments. By analyzing both advantages and disadvantages, we can have a better understanding of the video security market and can keep on providing customers with near-to-perfect video security solutions.

Mexico Jewelry Store Improves Suspect Identity With Arecont Vision Megapixel Cameras

Mexico Jewelry Store Improves Suspect Identity With Arecont Vision Megapixel Cameras

Editor / Provider: Arecont Vision | Updated: 4/26/2012 | Article type: Commercial Markets

Arecont Vision's megapixel IP cameras have proven to be a cost-effective deterrent to criminal activities because high quality images provide more detail for forensic review which can lead to improved suspect identity live and after the fact, and ultimately a safer environment for customers.

Mallor Joyeria, an upscale jewelry store in Morelia, Michoacan, Mexico, was a constant target of thieves. With the low-quality resolution of the store's previous video surveillance system, none of the suspects were ever definitively identified or caught. It was clear that a higher quality video surveillance system was needed, and Arecont Vision's megapixel camera technology provided the solution that Mallor Joyeria needed.

Eight of Arecont Vision's cameras were installed at the jewelry store, including six specifically positioned to cover jewelry showcases. The system is monitored locally by store management and can also be monitored remotely via the Internet. As a result of the Arecont Vision megapixel camera installation, store management reports a lower rate of theft attempts and an increase in security for customers.

Arecont Vision cameras enable the jewelry store to gather, analyze and interpret any evidence of theft, which helps them achieve their primary goal of greater security. In addition, better video quality makes it easier to view the way clients and clerks handle jewelry, watches and other highly valued products while they are being showcased.

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