Dahua Technology Indoor surveillance

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.

Dahua HDCVI Active Deterrence Camera
Dahua HDCVI Active Deterrence Camera

System OverviewThis PIR model is an indoor/outdoor dual detection camera which uses both video and infrared sensor to achieve accurate motion detection functionality. It also supports active deterrence feature which warns off intruders with siren even before users are aware of the incident. This camera is an ideal choice for applications which require intrusion protect and video verification, such as courtyards, offices, warehouses, stores. Functions 4 Signals over 1 Coaxial CableHDCVI technology supports 4 signals to be transmitted over 1 coaxial cable simultaneously, such as video, audio*, data and power. Dual-way data transmission allows the HDCVI camera to interact with the HCVR, such as sending control signal or triggering alarm. Moreover, HDCVI technology supports PoC for construction flexibility.* Audio input is available for some models of HDCVI cameras. Long Distance TransmissionHDCVI technology guarantees real-time transmission at long distance without any loss. It supports up to 700 m transmission for 5MP HD video overcoaxial cable, and up to 300 m over UTP cable.**Actual results verified by real-scene testing in Dahua's test laboratory. SimplicityHDCVI technology inherits the born feature of simplicity from traditional analogue surveillance system, making itself a best choice for investment protection. HDCVI system can seamlessly upgrade the traditional analogue system without replacing existing coaxial cabling. The plug and play approach enables full HD video surveillance without the hassle of configuring a network. Active DeterrenceActive deterrence is to warn off intruders actively with siren even before users are aware of the incidence. Once an intrusion is detected, the siren will buzzer to alert the intruder. The content of siren is configurable. Full-colourThe camera adopts F1.2 large aperture lens and 1/2.7" high performance sensor. With higher amount of absorbed light and advanced image processing algorithm, the camera can be able to present 24/7 coloured image that provides colour details to accurately identify people or objects in low light conditons. Warm Supplemental lightsWith two warm supplemental LED lights, the camera is able to provide a colorful and vivid image even in total darkness. It also provides visible by default, the camera is set to smart light mode, in which the camera can automatically adjust the exposure time and light sensitivity simultaneously to avoid overexposure of the objects in the image center. Also, the sensitivity and intensity of the LED lights can be remotely controlled by OSD menu. ProtectionThe camera's outstanding reliability is unsurpassed due to its rugged design.The camera is protected against water and dust with IP67, making it suitable for indoor or outdoor environments. With PIR working temperature range of –10 °C to +50 °C (–14 °F to +122 °F), the MotionEye is designed for extreme temperature environments. Supporting ±30% input voltage tolerance, this camera suits even themost unstable power supply conditions. Its 4KV lightning rating provides protection against the camera and its structure from the effects of lightning.

Dahua launches 800TVL camera - unveiling the evolving and better
Dahua launches 800TVL camera - unveiling the evolving and better

Dahua Technology releases the leading industry 800TVL analogue cameras — 19-series, which unveils the evolving and better “Analogue+ Era”. The image quality has been brought to a new height throughout analogue history. The 800TVL 19-series cameras feature in-house Mega-HDIS technology (Mega-High Definition Image Sensor), delivering ultra-high image resolution (1280x960). The advanced image sensor can achieve twice better resolution than the previous one, which is equally to 1.3-Megapixel in IP resolution. This series also uses an advanced ISP chipset, allowing the outputting frame rate up to 50fps that makes real-time preview and playback superb smooth. Image quality In addition to the outstanding outdoor/indoor performance under enough light sources, the 19-series is capable of rendering excellent image even at night or under low-light condition. 3D-NR The 3D-NR technology provides a more accurate noise reduction. Smart IR Smart IR solution features non-LDR (light-dependent resistor) technology, enabling an intellectual algorithm to detect more accurate timing of switching on/off ICR filer as well as to adjust the IR LEDs current for better visual effect under low-light scenarios. The first wave of 800TVL 19-series camera release includes six models, (FW191G/FW191D/FW191J/ D190C/DW191H/DW191E) with various designs and sizes; lenses are selectable from 2.8mm to 16mm, which satisfies diverse applications either indoor or outdoor. With all mentioned above, this camera series presents the highest image resolution in analogue history ever, which is apparently ideal for applications where high image quality is valued.

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