The Digital Sprite 2 from Dedicated Micros – Two products, one box
The Digital Sprite 2 from Dedicated Micros – Two products, one box

The new DS2 combines transmission with telemetry control and recording into one platform so there is no need for additional hardware when integrating a comprehensive CCTV solution. Furthermore, on-site operations have been enhanced with features such as DVD archiving and Duoview whilst maintaining the DS2’s familiar user interface.The combination of a user-friendly interface, remote management capability and leading edge features mean that the new DS2 can provide greater control and flexibility than ever before, and as part of the ‘NetVu Connected’ family the new DS2 is built to adapt to future advances in security technology.Advanced functionality includes: Remote Alarm Management - The new DS2 is now capable of integrating into a network based security system, with full support for Alarm Receiving Centres Improved recording flexibility - The DS2 has always provided useful facilities to control the amount of data that is recorded and ensure that there is sufficient capacity to meet the record durations customers require.  Improvements in the configuration of recording in the new DS2 allow even greater control and efficiency, while maximum storage has also been increased. Enhanced local control - The DS2 is renowned for its easy and intuitive local operation support. Improvements in local archiving, alarm display and image viewing make the new DS2 better than ever for the local operator. Investment protection - With total ownership of technology, DM has been able to support new developments in CCTV, while maintaining ongoing support for the traditional requirements for professional security installations. The new Dedicated Micros DS2 is available in 6, 9 and 16 camera variants, with the top of the range 600 GB model offering 2 months' out-of-the-box recording. 

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DM strengthens entry level DVR range with ECO9 launch
DM strengthens entry level DVR range with ECO9 launch

Dedicated Micros is launching Eco9, a 9-channel variant of its Eco family of DVRs which has consistently proved to be a popular option with smaller businesses such as convenience stores.  Interest in the new the Eco9 is extremely high and already Gardiner Security has signed-up to an exclusive agreement with DM to promote and distribute the Eco9 across the UK and mainland Europe. The Eco9 is priced to compete with traditional VCR/Multiplexer combinations, offering an affordable introduction to the benefits of digital recording for small, often independent, business owners, doing away with the tape management issues associated with traditional analogue CCTV solutions. As with the Eco4, which was introduced last year, the new ‘plug and play’ Eco9 has been designed with ease of use in mind, having been configured to time-lapse record straight out of the box by automatically detecting connected cameras on power-up.  Covert camera support ensures that staff pilferage can be minimised in a fast moving retail environment, and a spot monitor acts as a visible deterrent. The Eco9 can record a single camera in real-time (25/30 PPS) while at the same time playing back recorded images locally via powerful GOTO functions, or remotely through a PC using free network viewing software.  An integral CD writer is available for image export for evidential purposes, or if necessary images can be downloaded remotely over a company’s IT network, or internet. Pauline Norstrom, DM’s Marketing Manager said: “The introduction of the Eco9 gives users an enhanced choice providing a robust, high specification, entry level system, demonstrating that affordable does not have to mean cheap and ineffective.  Eco9’s extra channels mean that more cameras can be supported from the same unit offering future expansion, giving the small business owner peace of mind that they have chosen a reliable long term CCTV solution.”

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New DS2 Plus from Dedicated Micros – industry leading features with great price performance
New DS2 Plus from Dedicated Micros – industry leading features with great price performance

Dedicated Micros have released a product that includes all the familiar features of the Digital Sprite 2, but with double the record rate and more storage, dramatically improving its flexibility in high-end applications.  The DS2 Plus is capable of a market leading 100 PPS PAL / 120 NTSC record rate, and boasts a maximum storage of 600GB.  In addition – not only will DS2 Plus systems record longer, Dedicated Micros guarantee they will last longer too - all DS2 Plus models come with a three-year warranty as standard, covering both the units themselves and the hard disk drives.Record up to four cameras in real-time - DS2 Plus can record up to four cameras at 25/30pps each for capturing motion as fast as the eye can see.Increase event recording flexibility without wasting disk space - a doubled record rate will NOT automatically use up the available storage in double quick time, the extra record rate can be configured specifically to those cameras that enter alarm mode, without wasting disk space on cameras that are not alarmed.Two months standard recording - the new 600GB DS2 Plus model will record for over 2 months out of the box compared with the  54 days 500GB Digital Sprite 2 model.  This sets a significant new milestone in record duration for DS2 applications.An extra year’s peace of mind - DS2 Plus is backed by a full three years warranty covering all parts of the product including Hard Disk Drives.No learning curve - with no changes to the user interface or product dimensions used in the standard Digital Sprite 2, the 100/120PPS DS2 Plus dramatically extends the performance of the Digital Sprite 2 range while requiring no additional training.

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Dedicated Micros SD Excel a premium enterprise, hybrid DVR/NVR with Closed IPTV capability
Dedicated Micros SD Excel a premium enterprise, hybrid DVR/NVR with Closed IPTV capability

Dedicated Micros' SD Excel Closed IPTV Model is the perfect hybrid CCTV system product, designed to bridge the gap between legacy analogue camera estates and new IP and HD camera technology.The SD Excel is ideal for high end and critical infrastructure applications where there is a need to integrate high definition IP camera recording with standard definition images for general surveillance. Banks and Cash Handling institutions benefit from the ability to capture fast moving scenes in high risk area of their buildings where financial transactions are taking place or money is being deposited, together with images from general areas where there is less likely to be an incident. Controlled spaces, including waste management and recycling plants and critical infrastructure utilities sites, benefit from the product's capability to run video analytics on each channel, such as automatic number plate recognition, video trip wire or even video smoke detection. The analytics are seamless within the product, adding value to the video when combined with other site-specific data. The alarm integration features allow the product to be used as an integrated transmission device. When applied in a BS8418 compliant detector-activated solution the SD Excel is capable of being remotely monitored with the added benefit of support for bi-directional audio. Audio is an essential feature when used on remote sites, where valuable materials are stored externally, such as metal recycling plants and builders merchants. In practice a visually verified audio challenge ('talking CCTV') is sufficient to warn-off intruders in over 90 per cent of cases.SD Excel can be used as a standalone edge recorder, or as a completely hybrid NVR product. This means that it can be used in the central station or remote location, to decode and display multiple high definition streams to state of the are video walls without the need for a PC to control and manage video. The Industry has steered away from PC architectures due to their inherent instability and inability to redisplay multiple video streams.The SD Excel is supplied ready to be part of the next generation of video security - Closed IPTV solution, which makes deploying an IP Video CCTV system safe, secure and simple. Combining patent-pending innovation with zeroconf networking technology, Closed IPTV automatically allocates IP addresses to IP cameras by physical port. In this way the system is completely deterministic, creating firewalls and monitoring IP connections by individual network ports so they cannot be hacked or intercepted. This ground-breaking solution provides a very simple and secure answer to IP Video, meaning that no prior knowledge of IP networking is required. Sophisticated and Dependable network security can be achieved with a single click.SD Excel includes powerful new codecs with a Turbo Mode feature that ensures maximum per camera performance. Enabling Turbo Mode can effectively double the units performance allowing real-time recording at double the resolution simply with the press of a button. SD Excel offers real-time, full resolution recording per camera in a powerful hybrid DVR/NVR package that combines all the benefits of a DVR with the feature set of a high performance embedded NVR. It offers 32 channels of mixed IP and Analogue video, HDMI main monitor output, embedded decoder, on-board analytics, help videos and Oracle PTZ Dome, integrated configuration menus.

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16 camera, high performance DVR from Dedicated Micros
16 camera, high performance DVR from Dedicated Micros

The BX2 now includes the latest NetVu Connected technology, providing advanced networking functionality for professional remote alarm management today, and the flexibility to integrate with a wide range of distributed systems in the future.Improvements in recording flexibility ensure efficient recording, while the maximum storage capacity has been increased to 2TB to meet the needs of the largest installation.  The BX2 units come with an integrated DVD writer increasing the amount of evidence that can be taken away.In yet another industry first, the BX2 can now dynamically-switch between camera resolution, record-rate & compression settings using MultiMode Recording.  This is ideal for MPEG-4 background recording whilst simultaneously recording high quality JPEG images for evidence during alarm.The BX2 has also had many additional improvements to local operation based on customer feedback, while keeping its familiar and easy to use controls.Features in the BX2 include:Integrated DVD-Writer Simultaneous MPEG-4 and JPEG transmission and recording 100pps record rates MultiMode Recording Bi-directional audio Up to 2TB storage Compatibility with the latest release of NetVu ObserVer BS8418 compliance through tamper proof alarms, alternative signalling path and false alarm suppressionThe NetVu Connected BX2 provides top of the range performance and features combined with storage options to meet the most demanding large-scale installations.

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Dedicated Micros highlights seamless hybrid and IP video at ISC West 2011
Dedicated Micros highlights seamless hybrid and IP video at ISC West 2011

CCTV specialist Dedicated Micros - part of AD Group - showed off it's seamless hybrid and IP video capability at ISC West 2011 in Las Vegas. It also unveiled new IP video products, which expand the game changing Closed IPTV, deterministic, safe and secure IP video series. Highlights of the new patent pending Closed IPTV product lines include the entry-level EcoSense NVR (Network Video Recorder), hybrid SD Advanced NVR/DVR, layer 3 enhanced CCTV switch, and a series of ultra flexible IP cameras. Focusing on the EcoSense NVR, this pure IP video product, which was first shown at IFSEC in the UK in May 2010 contains a built-in Dedicated Micros Layer 3 enhanced CCTV switch, which provides safe and secure plug and play IP camera connection and recording, without any prior IP knowledge. Ecosense NVR overcomes the barriers in the way of traditional CCTV installers, who don't have the resources to re-train their engineers to become IT experts, enabling the installation of IP video solutions and bringing the benefits of high definition video to entry level applications. The Ecosense NVR contains the critical security features demanded in 24-hour surveillance applications including alarm integration and remote transmission features lacking in other NVR products. Moving on to the SD Advanced, hybrid NVR/DVR which, when coupled with the Layer3 enhanced CCTV switch, provides the perfect platform for legacy integration and completely secure, future expansion into IP video. The product supports up to 32 channels of IP video all of which can be megapixel cameras and like other Dedicated Micros products creates a seamless analogue and IP video solution managed from a single user interface - a key aspect of Dedicated Micros products for at least the last five years. Focusing on Dedicated Micros IP cameras, these comprise the CamVu Mini VR (Vandal Resistant) Dome, the CamVu Indoor Mini-Dome and CamVu box camera. Looking at these in turn, the CamVu Mini VR Dome combines High Definition image capture up to 2 mega pixel with a vandal resistant mini-dome housing, the potential - thanks to a built-in enterprise level video server - to support Integrated Camera Recording and Video Analytics plus wide-ranging network capabilities such as MultiMode Recording and Transcoding combined with both near side and off side storage capability. Closed IPTV compatibility also ensures that the Mini VR Mega-Pixel Dome can be set-up as a 'Trusted Endpoint' so protecting it from the dangers of hacking attack, especially when deployed in remote and vulnerable locations. Turning to the CamVu Indoor Mini-Dome, this 2 Mega-Pixel Closed IPTV capable camera delivers comparable features to the Mini VR Dome, aside from the absence of an environmental and vandal resistant housing, which is not required for indoor deployment. Said Pauline Norstrom, Director of Worldwide Marketing at Dedicated Micros: "We are delighted to showcase our very latest Closed IPTV surveillance products. The Mega-Pixel cameras we are unveiling tie-in very much with a growing demand for HD CCTV solutions, especially in high risk crime areas, where the combination of the detailed views provided by the cameras and optimised network security - with Closed IPTV - is proving to be an attractive proposition." "At the entry level we see the EcoSense NVR as an ideal starting point for security integrators who are looking at robust, embedded networked CCTV solutions for the first time or want a solution with reduced set-up time and enhanced ease of use. The fact that the EcoSense NVR is part of the game changing Closed IPTV means that a completely secure network of video over IP products can be readily created, where IP cameras are automatically identified and configured by the NVR as a point to point relationship - just like an analogue system. Once configured, the closed IP network can be totally locked down by a number of automatic firewall provisions and 'Trusted Endpoints' established without the need for any network knowledge." For more information on Dedicated Micros please log on to their website.

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Dedicated Micros launches market first in image archiving
Dedicated Micros launches market first in image archiving

The new BX2’s mirroring technology and easily removable drive caddies mean that customers can build archives of unlimited size and can remove up to two months of recorded data instantly – without having to power down or interrupt viewing or recording.With a total capacity of 1.2TB, arranged as two banks of 600GB mirrored (RAID1) storage, the BX2 is the ideal solution for customers who want to archive very large amounts of footage and for those who may need to transfer data to law enforcement agencies immediately.The four integrated RAID1 disks store two identical copies of all recorded data.  A pair of the disks can be removed directly from the machine at any time whilst recording continues unaffected.  This provides a failsafe backup is always in place should any disk fail.By regularly swapping out the RAID disk units, users can create continuous archives of unlimited capacity, without ever needing to pause recording or miss an event.  Once a unit is removed, a new one can be dropped in directly to maintain system performance. The easily-removable disk caddies also mean that there is no laborious copying to CD-R or DVD-R whenever video needs to be taken off the machine, minimising the potential for data loss and human error.  By providing a carbon copy of all recorded data, including its digital signature, there is no possibility of the information being lost or tampered with, critical for evidential  purposes.Data can be played back quickly and easily on any standard PC using an optional USB-connected caddie port and playback software, removing the need to invest in non-standard playback stations.

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Dedicated Micros introduces a feature packed DVR range with Telemetry
Dedicated Micros introduces a feature packed DVR range with Telemetry

The SD Range offers the user a high performance, easy to use plug and play DVR with selectable record duration providing up to 30 or 60 days recording. Now available in 4, 8, 12, 16 and 32 channel variants, the SD Range offers consistent recording duration and smooth motion video on ALL cameras. New "Normal, Medium and Low" recording models have been created which maintain consistent performance per camera, and off the shelf, guaranteed storage of up to 30 or 60 days. This allows the customer to build a CCTV solution that removes the need for extensive configuration. Menus allow per channel configuration to utilise full global PPS. Of course for those looking for more advanced features the SD's common user interface can be configured locally via its IR Remote Control/optional keyboard or remotely via web pages. Activity Detection, Alarm Reporting, Text support (for POS transactions), MultiMode Recording and of course Coax & Serial Telemetry are all included as standard in the SD Range. In addition, key variants in the range are able to take advantage of the advances in DM's software analytics programme. The AnalyticsCapable* technology recently introduced by Dedicated Micros will allow the user to deploy features such as ANPR, Object Left and Removed and People Counting to further enhance the value of their SD Range security solution. With the perfect combination of out of the box practicality and unrivalled levels of performance, the SD Range is the perfect mid-level DVR.

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Digital video recorders (DVRs) - Expert commentary

ONVIF Profile T and H.265: the evolution of video compression
ONVIF Profile T and H.265: the evolution of video compression

In today’s market, efficient use of bandwidth and storage is an essential part of maintaining an effective video surveillance system. A video management system’s ability to provide analysis, real time event notifications and crucial image detail is only as a good as the speed and bandwidth of a surveillance network. In the physical security industry, H.264 is the video compression format used by most companies. Some companies also employ H.264 enhancements to compress areas of an image that are irrelevant to the user at a higher ratio within a video stream in order to preserve image quality for more important details like faces, license plates or buildings. The H.265, H.264’s successor, will be increasingly used for compression in the future. Some companies are already using H.265 in their cameras and video management systems, while a host of other manufacturers are certainly preparing for its broader adoption in the years to come. Video compression technologies Reduced bandwidth and storage requirements are the primary benefits of video compression technologies Reduced bandwidth and storage requirements are the primary benefits of video compression technologies. In some cases, H.265 can double the data compression ratio of H.264, while retaining the same quality. Increased compression rate translates into decreased storage requirements on hard drives, less bandwidth usage and fewer switches – all of which reduce overall costs of system ownership. H.265 compression delivers a lower bitrate than H.264, which is relevant to end users and integrators because the lower bitrate reduces strain on hardware and can reduce playback issues. It’s very important that the compression format that is used is supported in all of the different components of a system: cameras, desktop computers on which the VMS is running and the VMS itself. It is also good for end users and integrators to understand the basics of video compression. Having a basic understanding of compression allows users to tweak settings to reduce bandwidth usage even more. Many cameras come with default settings that can be changed to ultimately reduce costs. ONVIF physical security In the physical security industry, ONVIF is working to incorporate into its specifications the use of new formats such as H.265 but is not directly involved in developing the compression standards themselves. With Profile T, the new ONVIF video profile released will employ a new media service that is compression agnostic. This means that it can support new video compression formats, including H.265, as well as new audio compression formats, with the ability to include new video and audio codecs as needed in the future without having to redesign its media service. In the physical security industry, ONVIF is working to incorporate into its specifications the use of new formats such as H.265 Standardisation organisations that are directly addressing new compression standards include the International Telecommunication Union (ITU), the Moving Picture Experts Group (MPEG) and a joint commission of the International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC), which is addressing the coding of audio, picture, multimedia and hypermedia information. Other compression formats on par with H.264 and H.265 are being developed by companies such as Google. H.265 compression formats Using products that employ H.265 compression will reduce costs through bandwidth reduction, as will changing default settings on cameras, which are often conservative. Having a basic understanding of compression formats and how to tweak camera factory default settings also gives integrators the ability to further reduce bandwidth for added costs savings and increased system performance. These enhancements will analyse which parts of an image are most important and adjust local levels of compressions accordingly It is also worth noting that H.265 enhancements will likely be developed by camera manufacturers to further reduce bandwidth, as was the case with H.264. These enhancements will analyze which parts of an image are most important and adjust local levels of compressions accordingly. While H.265 itself is ready for prime time, its value as a tool for IP-based surveillance systems is dependent on support for the codec in all parts of the system – the VMS, server hardware, graphics cards and camera. Though widespread H.265 adoption is predicted, providers of these components are jumping on the H.265 bandwagon at different rates of speed. ONVIF is including support for H.265 in its new video profile, Profile T, because it believes it will become the most widely used compression format and ONVIF recognises the need to anticipate that migration as a future need of the industry. The new media service, which will be implemented with Profile T, will be future-proof in that when new compression formats are released in the future, ONVIF can adopt them very quickly. That flexibility will definitely help integrators.

HD over Coax provides cost-effective video surveillance upgrade
HD over Coax provides cost-effective video surveillance upgrade

According to IHS Market, it is estimated that there are over 60 million security cameras in the United States, and other reports say these cameras capture more than four billion hours of footage per week. Over the last decade, IP camera technology has dominated the conversation as it has provided users with a broad offering of enhanced image quality and features. With a large percentage of existing security systems relying on analogue, many end users looking for high definition (HD) video quality have been forced to take on a complete system overhaul. Infrastructure overhaul for HD video To make the switch, customers would need to change everything, from cameras to hardware to wiring– not to mention the lengthy installation process that would ensue. IP cameras also require higher Internet speeds and more cloud space. Whether constrained by budget, bandwidth or storage, many end users have been unable to adopt this new video surveillance method.Thanks to technological advancements within the security industry, HD over Coax offers a viable solution for integrators and end users alike Thanks to technological advancements within the security industry, HD over Coax offers a viable solution for integrators and end users alike. By utilising the current Coaxial cables, this offering yields high definition video, while requiring minimal infrastructure changes and is an optimal surveillance choice for security customers. Plus, with new advancements and updates being made frequently to this technology, there is a solution for every security need. The enhanced alternative of HD over Coax has been warmly welcomed in the security industry, thanks to its simple solutions and ever-evolving features. Many new analogue HD cameras are “plug and play,” able to connect directly to existing Coaxial cables. This eliminates the need for a complete system change, creating cost-savings for the end user and an enhanced video quality offering. Easy solutions for HD video As a result, integrators can cost-effectively upgrade their customer’s surveillance solution while using their legacy infrastructure, making it an attractive option for end users and an easy sell for dealers. Latency in video is another common issue with network-based camera systems, where even the slightest delay in video surveillance can hinder security response HD over Coax cameras themselves are always expanding and evolving to meet a wide array of security needs. With the introduction of fisheye and multi-sensor cameras, users now have a multitude of coverage options, not to mention the introduction of 4K bringing resolution options to the same level as IP. Some newer technologies are even touting 4K cameras paired with 4K digital video recorders (DVRs) made specifically for analogue systems. Longer cables grant transmission for up to 1600 feet, double the distance of standard analogue solutions, and triple that of IP systems. This single cable is able to transmit both HD video and audio. Recently, broadcast quality audio over Coax has become available in limited models, a substantial improvement over older analogue technology, which was unable to transmit audio. Stopping video delay Latency in video is another common issue with network-based camera systems. Even the slightest delay in video surveillance can hinder security response. IP cameras are forced to compress and packetise their video for transmission. The outcome of this is a reduced number of images per video, which in turn causes delay. HD over Coax on the other hand, delivers an unlimited amount of HD images in real time, with smooth motion and impressive clarity. Additionally, the point-to-point transmission delivers uncompressed video free of lag. Another touted benefit is that, unlike IP networked cameras, analogue systems provide a more secure video transmission. With so much sensitive information housed on a businesses’ network, adding another point of network access through an IP camera can create concerns for cyber security risks. HD over Coax delivers an unlimited amount of HD images in real time, with smooth motion and impressive clarity Preventing network hacking With HD over Coax, the physical connections between the camera and DVR prevent network hacking. By keeping the video surveillance system offline, security professionals are able to direct their attention to the physical threats at hand, rather than having to focus on deterring cyber security risks. One of the primary difficulties of deploying HD video solutions is the fact that many older systems utilise a wide variety of HD standards and platforms. To make matters more complicated, after HD over Coax was brought to market, manufacturers raced to create their own version of this technology. Today, the most popular proprietary standards are HD-CVI, HD-TVI and AHD. However, integrators and customers found that attempting to manage multiple HD technologies proved to be near impossible.Integrators and customers found that attempting to manage multiple HD technologies proved to be near impossible Diversifying surveillance through one DVR To combat these issues, manufacturers have introduced products with more flexibility to their portfolios. One example of this is the penta-brid DVR which grants the ability to seamlessly integrate multiple technologies deployed across one application. This means that systems with diverse camera brands and technologies, such as a mix of HD-CVI, HD-TVI, AHD, analogue or IP, can be connected through one DVR. For many end users with legacy analogue systems, penta-brid DVRs give them greater freedom to choose between a variety of solutions, rather than being limited to one option. With video resolution increasing, the space needed to store the footage is similarly rising. Penta-brid technology has been able to adapt to these evolving needs, giving users ample storage space to house the HD and 4K surveillance video with some of the newest models including H.265 compression.  HD casino surveillance made simple For casinos, HD images are critical for identifying unauthorised personnel and unlawful behaviours to create a safe environment for guests and staff While HD over Coax is beneficial to many end users and integrators, those in the casino and hospitality markets find it crucial. With a combination of high profile guests, large amounts of cash on hand, constant crowds and strict industry regulations, reliable video surveillance is a must. Deploying new IP systems comes at a stiff price. When looking to upgrade their video surveillance, casinos must also be mindful of the installation process. When moving to an IP-based system, ripping out old wires and replacing them with new is the standard practice. This practice can be both disruptive and costly, not to mention gaming regulations require casino activities be monitored at all times so a complete system shutdown would result in revenue loss. This cost can be hard to justify, especially when the current legacy analogue system remains in working condition with only the lower image resolution to date it. For these scenarios, the most cost-effective option is to leverage the legacy infrastructure, replace the existing cameras with new devices, and reap the benefits that HD video has to offer without any lapse in security. For casinos, HD images are critical for identifying unauthorised personnel and unlawful behaviours to create a safe environment for guests and staff. HD over Coax cameras now offer the same resolution as IP cameras with a plug and play approach, that cuts down on expense without sacrificing quality. For businesses and applications that are unable to adopt IP technology, whether it be cost or time prohibitive, HD over Coax now features most of the same benefits IP has to offer without breaking the bank. By providing clear images in real time, maximising existing infrastructure, and affording cyber security benefits, HD over Coax provides an attractive solution for many end users and integrators.

Video surveillance must modernise in storage, recording and on-demand access
Video surveillance must modernise in storage, recording and on-demand access

Dollars spent by video surveillance customers must go towards ensuring high-availability capture, storage and on-demand access to live and archived video. Reaching this goal mandates high-availability of independent components – camera, network, storage (edge, external), internet connectivity, display, all Video Management Software (VMS) components and an architecture that can take advantage of this. In this note, we focus on seeing our way through to a video surveillance architecture, that provides high availability storage, access to live and stored video content. Of all options available to store recorded video, edge recording is the only one that is unaffected by network failure Edge recording Of all options available to store recorded video, edge recording is the only one that is unaffected by network failure. This makes edge storage a must-have. But, this has some limitations at present: Edge storage capacity is limited. Edge media has a short lifetime, rated only for thousands of hours of continuous recording. Most cameras are not secure and physical damage to the camera could lead to catastrophic loss of edge stored content. As storage and compression technology evolve, the constraints imposed by (1) and (2) could go away. However, securing cameras will continue to be a barrier for most installations. Secure external storage It is thus imperative to also store video in secure external storage. Such an architecture uses edge storage to fill in content gaps created by network, external storage outages. As edge storage technology improves, larger gaps can be filled in, but one will always need external storage. By our definition, ‘external storage’ is a solution stack that includes storage media and all software (including VMS) that provide access to this storage. Access to live and archived video Access to live video can either be met by external storage or directly by the camera Every surveillance solution needs to provide access to live and archived video. Access to live video can either be met by external storage or (and) directly by the camera. All things being equal, having the camera directly provide live video access, is a higher-availability solution. There is dependence on fewer components in the chain. Solutions in the market use one of the above two approaches for access to live video. Due to limited capacity and low physical security of edge storage, it makes sense at present, to have external storage meet all requests for archive video. Thus, we are led to an architecture that has heavy dependence on external storage. Dual-recording For high-availability, external storage must be architected with redundancy. Ideally, independent components that make up external storage – storage media, associated hardware and software (including VMS components), should be individually redundant and have smart interconnectivity. However, solutions in the market rigidly tie these components together. Failure of a single component causes failure of external storage. For e.g. hardware failure of a server causes VMS component failure AND storage failure. DR provides a smart way to provide high-availability for external storage For these solutions in the market, high-availability is achieved by having additional external storage units that step-in during outages of primary units. If these additional units continuously duplicate primary units, access gaps are minimised, and archive access is un-affected during primary unit outages. This is the idea behind Dual-Recording (DR).  To meet cost budgets, these additional units can be configured to store subsampled (framerate, resolution) video content. A small number of additional units can support concurrent outages of all primary units. A few-to-many redundancy. Rising need for dual-recording Most cameras cannot be physically secured, and video content produced by a camera must be stored externally. Many VMS solutions use external storage to service live video access requests. Edge storage limitations impose restrictions on edge archive access at present. So, external storage is used to service requests for archive access too. Thus, a surveillance system ends up being over-dependent on external storage. DR provides a smart way to provide high-availability for external storage. As edge storage improves, it will be able to service archive access requests. VMS software will need to evolve, to use this capability smartly.