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- Category: Connectors
An electrical connector is an electromechanical device used to join electrical terminations and create an electrical circuit. Most electrical connectors have a gender – i.e. the male component, called a plug, connects to the female component, or socket. The connection may be removable (as for portable equipment), require a tool for assembly and removal, or serve as a permanent electrical joint between two points. An adapter can be used to join dissimilar connectors.
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A network video recorder (NVR) is a software program that records video in a digital format to a disk drive, USB flash drive, SD memory card or other mass storage device. An NVR contains no dedicated video capture hardware. However, the software is typically run on a dedicated device, usually with an embedded operating system. Alternatively, to help support increased functionality and serviceability, standard Linux and Windows operating systems are used with standard Intel processors and video management software. An NVR is typically deployed in an IP video surveillance system.
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HD CCTV allows HD quality using exsiting cabling and intrastructure. This use existing Co-Ax Cabling. It does require a dedicated DVR, it will not work on Analog system DVR. It looks better than PAL/NTSC. HDcctv is a digital interface that delivers HDTV signals without any compression artifacts or transmission-related delays.HDcctv fits the cost-effective system architecture that has proven so useful for conventional CCTV systems. As a result, HDcctv unlocks HD for CCTV customers.
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An Internet protocol camera, or IP camera, is a type of digital video camera commonly. Employed for surveillance and which, unlike analog closed circuit television (CCTV) cameras, can send and receive data via a computer network and the Internet.
Although most cameras that do this are webcams, the term "IP camera" or "netcam" is usually applied only to those used for surveillance. The first centralized IP camera was Axis Neteye 200, released in 1996 by Axis Communications.
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In television production, PTZ controls are used with professional video cameras in television studios and referred to as camera robotics. These systems can be remotely controlled by automation systems. The PTZ controls are generally sold separately without the cameras. A pan–tilt–zoom camera (PTZ camera) is a camera that is capable of remote directional and zoom control.Auto tracking PTZ is an abbreviation for pan, tilt and zoom and reflects the movement options of the camera.
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Television lines (TVL) is a specification of an analog camera's or monitors's horizontal resolution power. It is alternatively known as Lines of Horizontal Resolution (LoHR) or lines of resolution. The TVL is one of the most important resolution measures in a video system. The TVL can be measured with the standard EIA-1956 resolution chart.
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CCTV Video Resolutions Format The table below lists some of the more commonly used resolution terms in CCTV applications. Any resolution over 1 million pixels is considered 'megapixel'. In the case of megapixel cameras, the labels are approximate. For example, a 2 megapixel camera actually captures 1,920,000 pixels per frame. A 3 megapixel camera captures 3,145,728 pixels per frame.
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A balun is an electrical device that converts between a balanced signal (two signals working against each other where ground is irrelevant) and an unbalanced signal (a single signal working against ground or pseudo-ground). A balun can take many forms and may include devices that also transform impedances but need not do so. Transformer baluns can also be used to connect lines of differing impedance. The origin of the word balun is “balanced to unbalanced”. Baluns can take many forms and their presence is not always obvious. Sometimes, in the case of transformer baluns, they use magnetic coupling but need not do so. Common-mode chokes are also used as baluns and work by eliminating, rather than ignoring, common mode signals. A variation of this device is the UNUN, which transfers signal from one unbalanced line to another.
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In digital imaging, a pixel, pel, or picture element is a physical point in a raster image, or the smallest addressable element in an all points addressable display device; so it is the smallest controllable element of a picture represented on the screen. The address of a pixel corresponds to its physical coordinates. LCD pixels are manufactured in a two-dimensional grid, and are often represented using dots or squares, but CRT pixels correspond to their timing mechanisms and sweep rates.
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Understanding lenses Selecting the most appropriate lens from installation can be a complex task. The choices constantly expanding in response to new Camera and Lens technology. Lenses have a number of characteristics that must be considered to match a particular requirement with the best Lens for the job.
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DVR 960H represents the number of effective pixels in the horizontal direction of the CCD image sensor. This is a drastic improvement over the previous industry standard of 760 horizontal lines giving 960H a 30% increase in the number of effective pixels.
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- Category: CCTV and Surveillance
LILIN day/night 4K Ultra HD (UHD) Auto Focus IP camera with a weather-proof sleek enclosure and 35-meter IR illuminator enhances High Definition (HD) images by providing 4 times HD pictures with beautifully natural detail and astonishing saturated colors.Built-in with Auto Focus feature to automatically focus the camera from a distant location, which eases the process on installation and helps you effectively position the camera at the right focus angle in a matter of seconds. The full featured 4K UHD Auto Focus IP camera produces a powerful output housed in a discreet form factor, which is perfect for themed and architectural environments.
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