Dahua Technology full-HD LCD display & control solution
Dahua Technology full-HD LCD display & control solution

Simplifying the display of multiple cameras from multiple sources has always been a challenge. Early analogue system used multiplexers and matrix switches coupled with many monitors. This created great complexity and cost. Control rooms were very large areas that required many operators. Energy to operate these control rooms was very high. Today, modern technology has enabled the simplification of the control room and the display of video sources along with other vital information. As the industry migrates from traditional analogue devices to IP network devices, consolidation of equipment is shrinking the space requirement for control rooms. The use of TCP/IP connectivity is enabling the linking of information systems such as weather, traffic, and other agency data along with the video feeds. New display technology now allows multiple images to be put together on a single display or span many displays. Content can now be dynamically assigned and moved throughout the control room display wall. LED monitors are now more energy efficient and are more durable when viewing 24/7 without the common “burn-in” issues.   As a total solution provider, Dahua Technology provides front-end cameras, NVRs, DVRs, as well as complete control centre solutions. Splicing video wall Dahua has been a manufacturer of video wall solutions since 2007. Dahua is one of the largest splicing video wall providers in China. Dahua ranked second with 9.1% market share in the industry.  Splicing video walls normally use LCD screens (LED backlight) with a very slim physical bezel, which is quite important when displaying an image across several monitors. The most common bezel in the market is around 5.5 millimetres. Dahua is proud to offer industry leading bezel sizes from 3.5mm. Dahua video wall monitors are available in 46” and 55” panel sizes. The displays have brightness levels from 500 nits to 700 nits to ensure a good view in all ambient light settings. All of the display panels are designed for 24/7 operation.  The surveillance industry requirement for video splicing walls far exceeds the requirements of digital signage applications. The surveillance application requires many types of inputs from devices including: IPCs, DVRs, NVRs; local HDMI/DVI/VGA video signals; and the number of the channels are often above 200. The ability to view many inputs with a single output or arrange inputs and outputs to meet the specific requirement can be challenging.  Network video matrix – a video wall controller that fits all scenarios In order to meet those tough requirements, Dahua utilises its experience of network video encoding and decoding technology in video matrix development. There are several technologies of video wall display in the market currently.   One way is using PC-based or server-based hardware to extend some graphics cards and develop software to control the output of the graphics card (It is called “virtual matrix” by some VMS vendors). Virtual matrix switches have specific disadvantages. Operating System vulnerabilities, graphic card limitations, and limited scalability make this solution less than optimal.  Dahua network video matrix is an embedded hardware specially designed for video wall solutions. Based on Advanced Telecom Computing Architecture (ATCA) architecture, it offers a redundant design for many important parts, such as fans and power, which greatly enhance its reliability and stability. In order to lengthen service life and make repair easy, modular design is used . The matrix consists of 3 parts: mainframe, encoding card and decoding card. The mainframe offers power, control, network and high bandwidth backplane for different cards. For the encoding card, the company offers multiple kinds of video interfaces including HDMI/ DVI/ VGA/ HDSDI/ HDCVI/ CVBS, etc. It is easy to input any kind of supported signal to this matrix with just the selection of the corresponding encoding card. Besides all these local video signals, it has a great capacity for network video streams such as IPCs, NVRs DVRs, etc. For the decoding card, it provides high network video decoding ability and offers the video output channel for both network video and local video signal as well. For pure network application, one matrix can decode 160ch@1080P/ 640ch@D1 network video streams and support up to 40 screens.  Combine this network video matrix with the video wall to provide a perfect solution for centralised visualisation in surveillance applications.  Another interesting trend In splicing video wall applications, LCD and DLP technology is already mature and be widely used in the market for several years. However, the LED modular technology comes into this market, growing with increasing share. DLP use has dropped with the trend towards LCD and LED Modules. The smaller pixel pitch of LED Modules is leading to higher adoption for indoor use. LED Modules have compelling advantages including: No physical seams, 281 trillion gorgeous colour, high brightness, high refresh frequency, long lifespan, and easy maintenance. Dahua believes that with the costs reduced, LED Modules will become a new driving force in video wall applications.   LED Modules are being used today for many indoor applications including: performance venues, advertising, information display, and promotional video. Hybrid systems of LED Modules and LCD Displays are being used more frequently in surveillance control room applications.

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Vanderbilt CCTV monitor gives users the full picture
Vanderbilt CCTV monitor gives users the full picture

Video monitor with 23-inch diagonal 16:9 format screen and full HD display LED backlight technology reduces energy by around 30 percent. Particularly suitable for security applications for viewing multiple video streams simultaneously. Specifically designed for CCTV applications, the new Vanderbilt CMTC2315 video monitor provides crisp, clear pictures from almost any video source. Part of the comprehensive Vanderbilt range of full HD CCTV products, it is ideally suited for use with the latest HD digital video recorders but it also delivers remarkably detailed pictures when used with conventional analogue video sources. This new monitor features a 23-inch diagonal 16:9 format screen and has a native resolution of 1920x1080 pixels, allowing it to display full HD (1080p) pictures at maximum quality. The screen uses the latest LED backlight technology, which reduces energy by around 30 percent compared with older flat panel monitors, thereby delivering significant savings in operating costs. A high contrast ratio of 1000:1 and an exceptionally wide viewing angle of 160o horizontal and vertical ensure that the monitor is comfortable to use and help to minimise operator fatigue. Picture-in-picture, picture-by-picture and video-on-video capabilities further increase its versatility, particularly in security applications where it is often useful to view multiple video streams simultaneously. To ensure the widest possible compatibility with both new and legacy CCTV systems, the monitor provides one HDMI input for use with high definition sources, one computer-compatible DVI input and two BNC analog inputs with loop-through outputs. A 3D comb filter and automatic de-interlacing are used to enhance pictures from analogue sources, which are displayed at a high resolution of 600 TV lines. The monitor also has two audio inputs and outputs as well as built-in speakers. To facilitate setup, the Vanderbilt CMTC2315 video monitor is supplied with a convenient IR remote control unit, and it offers a clear, straightforward on-screen display (OSD) of key operating parameters in a choice of seven languages. In addition, control buttons are provided on the monitor itself. They can be password- protected to prevent tampering by unauthorised persons.

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CCTV monitors - Expert commentary

How AI and security guards work together using video analytics
How AI and security guards work together using video analytics

How AI and humans can work together is a longstanding debate. As society progresses technologically, there’s always the worry of robots taking over jobs. Self-checkout tills, automated factory machines, and video analytics are all improving efficiency and productivity, but they can still work in tandem with humans, and in most cases, they need to. Video analytics in particular is one impressively intelligent piece of technology that security guards can utilise. How can video analytics help with certain security scenarios? Video analytics tools Before video analytics or even CCTV in general, if a child went missing in a shopping centre, we could only rely on humans. Take a crowded Saturday shopping centre, a complex one with a multitude of shops and eateries, you’d have to alert the security personnel, rely on a tannoy and search party, and hope for a lockdown to find a lost or kidnapped child. With video analytics, how would this scenario play out? It’s pretty mind-blowing. As soon as security is alerted, they can work with the video analytics tools to instruct it precisely With the same scenario, you now have the help of many different cameras, but then there’s the task of searching through all the CCTV resources and footage. That’s where complex search functions come in. As soon as security is alerted, they can work with the video analytics tools to instruct it precisely on what footage to narrow down, and there’s a lot of filters and functions to use. Expected movement direction For instance, they can tick a ‘human’ field, so the AI can track and filter out vehicles, objects etc., and then they can input height, clothing colours, time the child went missing, and last known location. There’s a complex event to check too, under ‘child kidnap’. For a more accurate search, security guards can then add in a searching criterion by drawing the child’s expected movement direction using a visual query function. A unique function like this enables visual criteria-based searches rather than text-based ones. The tech will then narrow down to the images/videos showing the criteria they’ve inputted, showing the object/child that matches the data and filter input. Detecting facial data There are illegal demonstrations and troublesome interferences that police have to deal with A white-list face recognition function is then used to track the child’s route which means the AI can detect facial data that has not been previously saved in the database, allowing it to track the route of a target entity, all in real time. Then, security guards can confirm the child’s route and current location. All up-to-date info can then be transferred to an onsite guard’s mobile phone for them to confirm the missing child’s movement route, face, and current location, helping to find them as quickly as possible. Often, there are illegal demonstrations and troublesome interferences that police have to deal with. Video analytics and surveillance can not only capture these, but they can be used to predict when they may happen, providing a more efficient process in dealing with these types of situations and gathering resources. Event processing functions Picture a public square with a number of entries into the main area, and at each entry point or path, there is CCTV. Those in the control room can set two events for each camera: a grouping event and a path-passing event. These are pretty self-explanatory. A grouping event covers images of seeing people gathering in close proximity and a path-passing event will show when people are passing through or entering. The video analytics tool can look out for large gatherings and increased footfall to alert security By setting these two events, the video analytics tool can look out for large gatherings and increased footfall to alert security or whoever is monitoring to be cautious of protests, demonstrations or any commotion. Using complex event processing functions, over-detection of alarms can also be prevented, especially if there’s a busy day with many passing through. Reducing false alarms By combining the two events, that filters down the triggers for alarms for better accuracy to predict certain situations, like a demonstration. The AI can also be set to only trigger an alarm when the two events are happening simultaneously on all the cameras of each entry to reduce false alarms. There are so many situations and events that video analytics can be programmed to monitor. You can tick fields to monitor any objects that have appeared, disappeared, or been abandoned. You can also check events like path-passing to monitor traffic, as well as loitering, fighting, grouping, a sudden scene change, smoke, flames, falling, unsafe crossing, traffic jams and car accidents etc. Preventing unsafe situations Complex events can include violations of one-way systems, blacklist-detected vehicles Complex events can include violations of one-way systems, blacklist-detected vehicles, person and vehicle tracking, child kidnaps, waste collection, over-speed vehicles, and demonstration detections. The use of video analytics expands our capabilities tremendously, working in real time to detect and help predict security-related situations. Together with security agents, guards and operatives, AI in CCTV means resources can be better prepared, and that the likelihood of preventing unsafe situations can be greatly improved. It’s a winning team, as AI won’t always get it right but it’s there to be the advanced eyes we need to help keep businesses, premises and areas safer.

Video surveillance as a service (VSaaS) from an integrator and user perspective
Video surveillance as a service (VSaaS) from an integrator and user perspective

Technology based on the cloud has become a popular trend. Most IT systems now operate within the cloud or offer cloud capabilities, and video surveillance is no exception: virtually every major hardware and software vendor offers cloud-based services. Users benefit from the cloud due to its numerous advantages, such as ease of implementation, scalability, low maintenance costs, etc. Video surveillance as a service (VSaaS) offers many choices, so there is an optimal solution for each user. However, what about integrators? For them, VSaaS is also a game-changer. Integrators are now incentivised to think about how they can maintain their markets and take advantage of the new business opportunities that the cloud model provides.   Hosted video surveillance The cloud service model has drastically changed the role of an integrator. Traditionally, integrators provided a variety of services including system installation, support, and maintenance, as well as served as a bridge between vendors and end-users. In contrast, hosted video surveillance as a service requires a security system installer to simply install cameras and connect them to the network, while the provider is in direct contact with each end-user. The cloud service model has drastically changed the role of an integrator There is no end to on-premises systems. However, the percentage of systems where the integrator’s role is eliminated or considerably reduced will continue to increase. How can integrators sustain their markets and stay profitable? A prospective business model might be to become a provider of VSaaS (‘cloud integrator’) in partnership with software platform vendors. Cloud-based surveillance Some VMS vendors offer software VSaaS platforms that form the basis for cloud-based surveillance systems. Using these solutions, a data centre operator, integrator, or telecom service provider can design a public VSaaS or VSaaS in a private cloud to service a large customer. The infrastructure can be built on any generic cloud platform or data centre, as well as resources owned by the provider or client. So, VSaaS providers have the choice between renting infrastructure from a public cloud service like Amazon Web Services, Microsoft Azure, or Google Cloud or using their own or clients’ computing infrastructure (virtual machines or physical servers). Gaining competitive advantage When integrators purchase commitment use contracts for several years, they can achieve significant savings As an example, a telecom carrier could deploy VSaaS on their own infrastructure to expand their service offering for clients, gaining a competitive advantage and enhancing profits per user. Using a public cloud, a smaller integrator can host the computing infrastructure immediately, without incurring up-front costs and with no need to maintain the system. These cloud services provide scalability, security, and reliability with zero initial investment. When integrators purchase commitment use contracts for several years, they can achieve significant savings. Next, let’s examine VSaaS options available in the market from an end-users point of view. With hosted (or cloud-first, or true-cloud) VSaaS solutions, all the video feeds are transmitted directly from cameras to the cloud. Optionally, video can be buffered to SD cards installed on cameras to prevent data losses in case of Internet connection failures. Dedicated hardware bridges There are many providers of such services that offer their own brand cameras. Connecting these devices to the cloud should only take a few clicks. Firmware updates are usually centralised, so users don’t have to worry about security breaches. Service providers may offer dedicated hardware bridges for buffering video footage and secure connections to the cloud for their branded and third-party cameras. Service providers may offer dedicated hardware bridges for buffering video footage Typical bridges are inexpensive, basic NVRs that receive video feeds from cameras, record on HDD, and send video streams to the cloud. The most feature-rich bridges include those with video analytics, data encryption, etc. Introducing a bridge or NVR makes the system hybrid, with videos stored both locally and in the cloud. At the other end of the spectrum relative to hosted VSaaS, there are cloud-managed systems. Video management software In this case, video is stored on-site on DVRs, NVRs, video management software servers, or even locally on cameras, with an option of storing short portions of footage (like alarm videos) in the cloud for quick access. A cloud service can be used for remote viewing live video feeds and recorded footage, as well as for system configuration and health monitoring. Cloud management services often come bundled with security cameras, NVRs, and video management software, whereas other VSaaS generally require subscriptions. Keep in mind that the system, in this case, remains on-premises, and the advantages of the cloud are limited to remote monitoring and configuring. It’s a good choice for businesses that are spread across several locations or branches, especially if they have systems in place at each site. On-site infrastructure All that needs to be changed is the NVRs or VMS with a cloud-compatible model or version All locations and devices can be remotely monitored using the cloud while keeping most of the existing on-site infrastructure. All that needs to be changed is the NVRs or VMS with a cloud-compatible model or version. Other methods are more costly and/or require more resources to implement. Hosted VSaaS helps leverage the cloud for the highest number of benefits in terms of cost and technological advantages. In this case, the on-site infrastructure consists of only IP cameras and network equipment. This reduces maintenance costs substantially and also sets the foundation for another advantage of VSaaS: extreme and rapid scalability. At the same time, the outgoing connection at each site is critical for hosted VSaaS. Video quality and the number of cameras directly depend on bandwidth. Broadband-connected locations Because the system does not work offline, a stable connection is required to stream videos. In addition, cloud storage can be expensive when many cameras are involved, or when video archives are retained for an extended period. The hosted VSaaS is a great choice for a small broadband-connected location The hosted VSaaS is a great choice for small broadband-connected locations and is also the most efficient way to centralise video surveillance for multiple sites of the same type, provided they do not have a legacy system. Since it is easy to implement and maintain, this cloud technology is especially popular in countries with high labour costs. Using different software and hardware platforms, integrators can implement various types of VSaaS solutions. Quick remote access For those who adhere to the classic on-premises approach, adding a cloud-based monitoring service can grow their value proposition for clients with out-of-the-box capabilities of quick remote access to multiple widely dispersed sites and devices. For small true-cloud setups, there is a possibility to rent a virtual machine and storage capacity in a public cloud (such as Amazon, Google, or Microsoft) and deploy the cloud-based VMS server that can handle dozens of cameras. In terms of features, such a system may include anything from plain video monitoring via a web interface to GPU-accelerated AI video analytics and smart search in recorded footage, depending on the particular software platform. Optimising internet connection Hybrid VSaaS is the most flexible approach that enables tailoring the system to the users’ needs High-scale installations, such as VSaaS for public use or large private systems for major clients, involve multiple parts like a virtual VMS server cluster, web portal, report subsystem, etc. Such systems can also utilise either own or rented infrastructure. Some vendors offer software for complex installations of this kind, though there are not as many options as for cloud-managed systems. Finally, hybrid VSaaS is the most flexible approach that enables tailoring the system to the users’ unique needs while optimising internet connection bandwidth, cloud storage costs, and infrastructure complexity. It’s high time for integrators to gain experience, choose the right hardware and software, and explore different ways of building systems that will suit evolving customer demands in the future.

Changing the landscape of event security with Martyn’s Law
Changing the landscape of event security with Martyn’s Law

Martyn’s Law (also known as ‘Protect Duty’) could forever change the landscape of event security if changes to legislation are passed. Some would argue it already has. In 2017, just as concertgoers were leaving the Manchester Arena, a terrorist detonated an improvised explosive device in a suicide attack killing 22 and injuring more than 250. The mother of one of the victims, Martyn Hett, has tirelessly campaigned for tighter security and a duty of care to be placed upon venues to protect their patrons. As a result, Martyn’s Law (‘Protect Duty’) has been proposed in UK legislation to protect the public from terrorism. At the same time, other global trends have indicated the need for action on this front. Labour-intensive task The Global Terrorism Index 2020, for instance, reported a steep increase in far-right attacks in North America, Western Europe, and Oceania, stating a 250% rise since 2014, with a 709% increase in deaths over the same period. But, how do we implement the measures proposed by Martyn’s law without intruding on our lives through mass surveillance? The Global Terrorism Index 2020, reported a steep increase in far-right attacks in North America Traditionally, cameras and CCTV have been the go-to solution for monitoring. However, maintaining a comprehensive view of locations with complex layouts or venues that host large crowds and gatherings can be a challenging and labour-intensive task for operatives. Camera outputs have been designed to be interpreted by people, which, in turn, requires a significant human resource that’s liable to inconsistent levels of accuracy in complex environments where getting things wrong can have a catastrophic impact. Highly accurate insights Fortunately, technology is evolving. AI-based perception strategies are being developed alongside advancements in 3D data capture technologies – including lidar, radar, and ToF cameras - that are capable of transforming surveillance with enhanced layers of autonomy and intelligence. As a result, smart, automated systems will be able to work alongside the security workforce to provide an always-on, omniscient view of the environment, delivering highly accurate insights and actionable data. And, with the right approach, this can be achieved without undue impact on our rights as private citizens. While much of this innovation isn’t new, it has been held back from at-scale adoption due to the gaps that remain between the data that’s captured and the machine’s ability to process it into an actionable insight. High traffic environments It’s crucial that they are able to detect all individuals and track their behaviour as they interact In security, for example, this gap is most present when it comes to addressing occlusion (in other words, recognising objects that move in and out of view of the sensors scanning a space). For security systems to provide the high levels of accuracy required in high traffic environments, such as concert venues, it’s crucial that they are able to detect all individuals and track their behaviour as they interact with a space and those within it. This, of course, is possible using multiple sensor modes. However, without the right perception platform to interpret the data being captured, the risk of missing crucial events as a result of the machine misinterpreting a partially concealed individual as an inanimate object, for instance, is significant. Identifiable personal data This gap is narrowing, and thanks to the first wave of sensor innovators, this shift in dependence from video read by people to 3D data point clouds read by machines have meant that we are now able to capture much richer information and data sets that can precisely detect and classify objects and behaviours – without capturing biometric and identifiable personal data. But what we need to fully close the gap are perception strategies and approaches that can adapt to the ever-changing nature of real-world environments. This gap is narrowing, and thanks to the first wave of sensor innovators Until now, this has been a lengthy and costly process requiring those implementing or developing solutions to start from scratch in developing software, algorithms, and training data every time the context or sensor mode is changed. But, by combining proven 3D sensor technologies like lidar with the deep learning first approach, this needed to be the case. Edge processing platform That’s why we are developing an adaptive edge processing platform for lidar that’s capable of understanding the past and present behaviour of people and objects within a given area. Through deep learning, it can predict the near-future behaviour of each object with some degree of certainty, thereby accurately and consistently generating real-time data and tracking the movement of people in the secured environment at scale. This approach has value beyond security. Facilities teams, for example, can extract a wealth of information beyond the primary function of security to support other priorities such as cleaning (tracking facility usage so that schedules can be adjusted), while retailers can optimise advertising and display efforts by identifying areas of high footfall. Likewise, health and safety teams can gather much deeper insights into the way spaces are used to enhance processes and measures to protect their users. Programming limitless scenarios Martyn’s Law will leave them with no option but to rethink their approach to security and safety As we’ve explained, perception is reaching new levels of sophistication through deep learning. By continually programming limitless scenarios, our approach can provide consistently accurate and rich data that users can trust. This will ultimately change the way we manage environments at a time when liability comes with ever-increasing consequences. For venue providers, Martyn’s Law will leave them with no option but to rethink their approach to security and safety. But, with new, smarter, more accurate tools at their disposal that will enable them to predict and protect, rather than just react, risks – both human and commercial – can be addressed. Meanwhile, the public can take comfort in knowing that measures to keep them safe needn’t mean sacrificing their privacy.

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