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Surveillance Systems

Digital Video Recorder (DVR)

A digital video recorder (DVR) is an electronic device, which encodes , processes and records the feed from analog cameras in to a hard drive with the date and time as per the parameters set inbuilt using the video capture hardware and the video can be searched and reviewed and used as a evidence of occurrence of an incident. The DVR has options to set the recording resolution / Type of recording/ Video Parameters / Alarm handling etc. depending on the requirement a specific DVR model can be selected by the user.

Application and usage:
DVR’s are normally preferred/used by users who are really in need of a security /surveillance system at a optimal cost meeting their requirement of recording of the video from the cameras as the configuration done. DVR’s are used in locations where doing a cabling is not a constraint. DVR’s normally supports analog cameras only but nowadays Hybrid DVR’s are available which support a combination of ANALOG and IP cameras.

 

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Features /Specs:

  • Operating system: Embedded Linux or RTOS
  • Video input: 4/8/16/24/32 channel Video/audio inputs options are available
  • Video output: VGA /CVBS /HDMI interface available (varies with models)
  • Preview resolution: Depending on the Model various options are available CIF, D1, etc.
  • Recording resolution: Ranges available like QCIF/CIF/4CIF
  • Search function: Recorded files search function based on various parameters available
  • No of HDD’s support: Supports HDD capacity up to 4GB per slot/interface
  • HDD capacity: Supports HDD capacity up to 4GB per slot/interface
  • Video parameters: Can be configured as per requirement
  • Interfaces: Various interfaces like USB/RJ45/RS485/RS 232 are available
  • Remote access: Remote access of the DVR through LAN and WAN possible
  • Web server: Web server is inbuilt for remote access/configuration using a web browser

Analog Cameras

Dome Camera

A dome camera is a camera which derives its name due to its shape, and it is mostly preferred to be used in areas (mostly indoor) where the overall aesthetics is important and also in corporate offices as it is more fashionable and readily matches most of the environments with easy installation.

Features /Specs:
  • Horizontal resolutions: Ranges vary like 420/480/540/600/700 TVL
  • Imaging device: Uses CCD /CMOS sensors
  • Lens type: In-Built Fixed or Varifocal lens as per requirement
  • Iris control: Manual or AUTO (model specific)
  • Illumination: Lux levels available like 0.01/0.03/0.05/0.07/0.1/0.3 etc.
  • Lens focal length: Options like 3.6mm/4-9mm/2.8–10 mm etc. (differs based on models)
  • AGC/BLC /AWG: Can be Manual or Auto mode (differs based on models)
  • Enclosure /casing: Available in plastic/metallic/vandal-proof casing
  • Operating voltage: 12V DC
Application and usage:

Dome cameras are normally used in homes/offices/hotels/banks as an indoor camera for security and surveillance purposes based on the user’s aesthetic and functional requirements.

A box camera is a camera which is in the shape of a rectangular box and suitable for using in both indoor and outdoor environment (weather proof housing may be used wherever required). The box camera has very high range of models from low end to high end catering to the various needs of the customer. Box camera is designed with the provision to fit lens as per requirement.

Features /Specs:
  • Horizontal resolutions: Ranges vary like 420/480/540/600/700 TVL
  • Imaging device: Uses CCD /CMOS sensors
  • Lens type: In-Built Fixed or Varifocal lens as per requirement
  • Iris control: Manual or AUTO depending on the model and lens used
  • Illumination: Lux levels available like 0.01/0.03/0.05/0.07/0.1/0.3 etc.
  • Lens focal length: Various lenses with suitable mount (C /CS mount) can be used
  • AGC/BLC /AWG: Configurable through dip switch or inbuilt software (model specific).
  • Enclosure /casing: Metallic /vandal proof casing
  • Operating voltage: DC12V/24VAC or 220VAC
Application and usage:

The Box Cameras are mostly preferred in places where the location/coverage area differs and the lens required for the same will be easily fixable as per the requirement. This is also preferred where the environment of usage requires a rugged design. It’s commonly used in public place monitoring, residential surveillance, office compound monitoring etc…

The Speed Dome cameras are also dome-shaped with the most important feature of 360° PAN rotation and 180° tilt of the camera with inbuilt motor and optical zoom with a large range of zoom options depending on the model. The camera comes in a weatherproof enclosure making it easy to use in most outdoor locations. These cameras can also move automatically on a preset pattern of movement and can be set for auto-tracking, which helps monitor/record the area under surveillance more effectively. The inbuilt control in the DVR or the wide range of accessories for easy maneuvering, such as joysticks and mounting kits, are available for indoor/outdoor installations.

Features / Specs:
  • Horizontal resolutions: Ranges vary like 480/540/600/700 TVL
  • Imaging device: Uses CCD /CMOS sensors
  • Camera Rotation Range: Pan 0°~360°, Tilt -5°~180°
  • Optical Zoom: Various optical zoom ranges like 12x /23x / 27x/36x / 64x / 128x
  • Wide Dynamic Range: Auto/Manual wide dynamic range
  • Configuration setting: Manual/automatic settings of AGC/HLC/HLC
  • Digital Zooming: Digital Zoom feature available in various ranges
  • Operating voltage: 24V AC
Application and usage:

The Speed Dome camera is mostly preferred and used in outdoor locations to monitor the periphery of large campuses, shipping container yards, city surveillance, highly sensitive government buildings, hospital campuses, etc., where the need for PAN/Tilt rotation/Optical/Digital zoom will be a necessity.

An IR camera is one that has an in-built Infra-red LED light source, which provides the capability for the camera to capture images even in ‘0’ lux (pitch dark) conditions using the infrared LED light in black and white color. The picture clarity and distance covered in IR mode will vary from model to model, depending on the number of LEDs and their intensity. During the daytime or normal light conditions, the camera works as any other standard camera.

Features / specs:
  • Horizontal resolutions: Ranges vary like 420/480/540/600/700 TVL
  • Imaging device: Uses CCD /CMOS sensors
  • Lens type: Fixed or Varifocal lens
  • Iris control: Auto
  • Illumination: Lux levels available like 0.01/0.03/0.05/0.07/0.1/0.3 etc.
  • No of IR LEDs: Ranges vary like 12/18/24/36/48 etc.
  • Lens focal length: Various options like 3.6mm/6mm/4-9mm etc., available
  • IR range: Viewing distance in IR mode varies model-wise
  • AGC/BLC /AWG: Auto
  • Enclosure /casing: IP 60/IP 66 waterproof/weatherproof metallic enclosure
  • Operating voltage: 12 VDC
Application and usage:

IR cameras are mostly preferred and used in locations where image capturing is required even in complete dark conditions (0 lux). The cameras are used in locations like bank strong rooms, large campuses, and areas that need to be monitored critically in terms of surveillance. IR cameras are available in various forms like IR DOME, IR Bullet, and IR SPEED DOME. Depending on the need, the specific type can be selected.

A Pinhole camera is a miniature camera with the electronic circuitry designed to be housed in a small casing, mostly metallic, with a small pinhole-sized lens. This enables it to be used and positioned in such a way that the camera’s presence is not easily identified by miscreants.

Features / specs:
  • Horizontal resolutions: Ranges vary like 420/520/600 TVL etc.
  • Imaging device: Uses CCD sensors
  • Lens type: Fixed pinhole lens
  • Illumination: Lux levels available like 0.0003/0.1/0.3/1 etc.
  • Lens focal length: Built-in 3.7mm lenses are mostly used
  • AGC/BLC /AWG: Auto or configurable using a switch or inbuilt software (model specific)
  • Enclosure /casing: Small metallic box casing
  • Operating voltage: 12 VDC
Application and usage:

A Pinhole Camera is normally preferred and used in locations/areas where the user wants to ensure that the camera is positioned/installed in a hidden manner easily and that the particular area can be under surveillance. These cameras are mostly used in ATM rooms, entrances of buildings, etc.

IP Based Systems

Network Video Recorder systems

A Network Video Recorder (NVR) is a device used for integrating the IP cameras for recording/capturing the video data from the IP cameras into the HDD in digital form. The NVR does not have dedicated video capture hardware, instead, it gets the input from the network interface. In the NVR, the video is encoded and processed at the IP camera end, and then the streaming happens to the NVR for recording/remote viewing, thereby making the NVR an integral part of the IP video surveillance system.

Features / specs:
  • Operating system: Embedded OS
  • Video input: Through the network interface
  • Video output: VGA /HDMI interface for local configuration
  • Recording resolution: Ranges start from QCIF/4CIF/Megapixel
  • Search function: Recorded files search function based on various parameters available
  • No of HDD’s support: Varies by need and model, RAID arrays are also available
  • HDD capacity: Varies model to model
  • Video parameters: Can be configured as per the recording requirement and space optimization
  • Interfaces: Various interfaces like USB/RJ45/RS485/RS232 are available
  • Remote access: Remote access of the DVR through LAN and WAN possible
  • Web server: Web server is built-in for remote access/configuration using a web browser
Application and usage:

Network Video Recorders (NVR) are an integral part of the IP surveillance system, enabling you to smartly unify, coordinate, and manage your network monitoring camera network. It has multiple-level applications at enterprise, business, corporate, and residential complexes.

IP Cameras are cameras integrated with additional intelligence through which the video information is encoded (converted to digital form) in the camera and ready for transmission through the network interface to the SD card or external recording device. The cameras can be configured individually for various parameters like motion detection/recording/video settings/alarm settings, etc., made possible through the inbuilt firmware and the integrated network interface (features vary model to model). The IP cameras can be remotely accessed through WLAN or LAN network through a web browser/client software for live preview/configuration. These cameras come with PoE enabled or disabled depending on the model. The IP cameras are available in all common types similar to analog cameras, including IP Dome, IP C Mount, IP IR Camera, IP Speed Dome, etc.

Features / specs:

  • Imaging device: Uses CCD /CMOS sensors
  • Lens type: Fixed /Varifocal lens used based on requirement (inbuilt)
  • Resolution: Resolutions range in megapixels like 1.3MPx, 2MPx, 3MPx etc.
  • Illumination: Lux levels available like 0.0003/0.1/0.3/1 etc.
  • Internal Memory: Can support up to an internal SD card storage of 32 GB
  • Iris control: Manual IRIS /AUTO Iris
  • Illumination (cont.): Lux levels available like 0.01/0.03/0.05/0.07/0.1/0.3 etc.
  • Lens: Options like 3.6mm/4-9mm/2.8 – 10 mm etc. (differs based on models)
  • Configuration setting: Using the inbuilt firmware through remote access
  • Enclosure /casing: Available in plastic/metallic/vandal-proof casing
  • Operating voltage: 12V DC /24 VAC power input

Application and usage:

IP cameras are mostly preferred/used where the need is for high resolutions not available in analog cameras. Cabling for analog cameras can be difficult. IP cameras allow configuration individually with different settings for recording parameters/motion detection/resolution and can also be remotely configurable using a web browser/client software. IP cameras are easy to install as they can be directly connected to the LAN/WAN network or WIFI using network cables. IP cameras are used in corporate offices, big buildings, banks, government office premises, homes, schools, etc.

Video management software runs on a windows/Linux/MAC system, enabling the various video recording, analyzing and monitoring functionalities. The VMS software is designed to receive multiple streams from various camera units. It has the ability to record, catalog, streaming the received network-data.

Features :

· Automatic Simultaneous viewing and recording facility

· Manage different Recording modes including continuous, motion detect /alarm etc.

· Access Remotely through Network or Internet

· Alarm Management functions

· Meet the high frame rate for speed dome and other high-value camera’s

· Access through Mobile through specific apps

· Various Video functions such as Pop-up video window, Sound effect 

· Event display window, Automatic audio output, Change active channel etc…

Application and usage:

The VMS system provides the network camera with a centralized co-ordination and coverage. All these makes the VMS software’s extensively used in medium to large corporate offices, corporate spaces, commercial places, showrooms etc…

The Video Analytics software is software that analyses the video from the IP cameras in real time on the basis of the conditions /rules set for analysis and raises alerts /alarms as per the rule configuration. The Video analytics software stores the details of the analysis along with the video so that the occurrence of any incident can be traced based on the rule and any deviations of the rules can be easily identified thereby making the whole surveillance system easy and independent of continuous human monitoring without missing any critical information. Video analytics is normally integrated into the VMS or comes as separate third party software which can be linked to the VMS. Nowadays some IP cameras also comes with in-built video analytics capability.

Features:

· Identify patterns and trends enabling a quick response

· Options to set rules based on which the video is analyzed and alerts/Alarm raised

· Helps easy identification of suspicious objects

· Enables advanced Functionality of the existing security network

· Software is remotely configurable.

· Can generate alerts as  voice, visual email,etc.,

Application and usage:

Video Analytics mainly preferred /used by security officers, and corporate managers, to make practical and effective use of their surveillance systems. This makes Video Analytics software’s an indispensable part of corporate environment, large commercial ecosystem and even large residential complexes. Usage of Video Analytics to automatically monitor cameras and alert for events of interest is more effective than a human operator who is less alert than the software.

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