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.

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.

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. 

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. 

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.

There are a variety of 960H cameras in the market although; there are very few digital video recorders that can record and playback video under the same resolution. The previous industry standard was capable of only capturing 540 TVL (TV lines) where the 960H DVR’s will capture the full 700 TVL.

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.

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.

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.

What is a P2P IP camera and how does it work? With HD P2P cameras use a smartphone download the app, scan the QR code and start viewing a live feed of the camera. Before P2P came along, cameras used to be a nightmare to setup. Setup the camera, then login to the router and setup a DDNS and open ports to allow access. P2P stands for “Peer to Peer”. It is a technology that makes it simple to link the camera with a smartphone. In camera speak, there is a UID (unique ID) assigned to each camera. When the smartphone app is opened, it pings the P2P server which in turn looks for the listed UIDs and where they are located. If the camera can be pinged, it shows as online, others are offline. Once the cameras are reached, it creates a direct connection between the app and the camera. Just like the popular Bittorent peer to peer file sharing platform.

In digital imaging, a pixelpel, 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.

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.

Star light mode is a function that a CCD camera is able to see clear color images under very low lighting situation such as 0.0002 lux illumination level. All CCD sensors are designed to work on 1/50,1/60 ~1/2000 sec. shutter speed. The minimum illumination level or so called sensitivity is limited on 3 to 6 lux with a F1.2 lens on 5600k. Starlight camera proprietary DSP can drive CCD shutter speed to as low as 1 sec ~10 sec. As a fundamental of physics the longer the shutter open, the more photon the CCD will capture, and it increases 100 ~ 600 times of sensitivity more than legacy cameras. Starlight cameras have 4 times of sensitivity on legacy mode more than the cameras of other series. Starlight cameras multiply light for 128X on star light mode. This brings Starlight cameras 512 times of sensitivity more than all other cameras on the market.

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.