It is an angle of view of the camera expressed in degrees, depending on the lens and camera type and the focal length of the lens. For lenses used in CCTV cameras, the field of view is horizontal.
Focal length is a distance between an optical focus of an optical system and a cardinal point of the optical system in millimeters and is defined as the lens system ability to focus light. The smaller the focal length, the more the light beams are focused by the optical system.
H.264 – is a hybrid coding standard using innovative and advanced solutions to improve the compression ratio of a video sequence without affecting its quality.
HD-CVI (High Definition Composite Video Interface) - an HD (1280x720), Full HD (1920x1080), 4 Mpx (2560x1440) and 8 Mpx 4K UHD (3840x2160) signal transmission standard via a 75 Ω coaxial cable or twisted pair with video baluns.
HD-TVI (High Definition Transport Video Interface) - an HD (1280x720) and Full HD (1920x1080), 3 Mpx (2048x1536), 4 Mpx (2688x1520), 5 Mpx (2560x1944) and 8 Mpx 4K UHD (3840x2160) signal transmission standard via a 75 Ω coaxial cable or twisted pair with video baluns.
HDMI (High Definition Multimedia Interface) standard – an interface for data transmission between devices. Since its introduction at the end of 2002, several different standards have been implemented.
An optical element in form of an adapter designed to block infrared wavelengths. Depending on the operation mode (day or night) a specialised mechanism covers or uncovers the image sensor.
IK rating is a classification for the degrees of protection provided by enclosures for electrical equipment against external mechanical impacts. The higher the IK code, the higher the mechanical strength. The IK rating is an 11-code scale (‘00’ to ‘10’).
Mpx (MP, Mpix) is an abbreviation of Megapixel. It is a unit describing in millions the number of elementary points of the CCD matrix. The higher the number means the higher image resolution. See a graphical comparison of different image sizes.
An image sensor is a photosensitive element converting the image into an electric signal. It uses a photoelectric effect by converting a stream of photons into electric impulses. It is one of the key components of any camera or any device designed for taking photos or recording video sequences.
IP rating also referred to as the degree of protection defines the resistance to external conditions. The first digit denotes a resistance to solid and dust ingress, the second digit denotes a resistance to water ingress.
Iris diaphragm is part of a lens controlling the amount of light reaching the image sensor. It controls the relative aperture of the lens to reduce or increase the amount of light in lenses with adjustable iris (manual iris, auto iris) or is fixed.
M-JPEG is an intra-frame compression method with a maximum compression ratio limited to approx. 1:20. The frames are compressed individually and the compression requires less computing power and memory compared to H.264.
Maximum transmission range: in actual conditions may be several times smaller than the maximum transmission range in the open areas. Wave attenuation can be affected by many factors.
Relative humidity is the amount of water vapour present in a specific volume expressed as a percentage of the amount needed for saturation at the same temperature.
Minimum temperature is a lower limit of operating temperature. It is a minimum guaranteed operating temperature specified by the manufacturer - see the camera test in the climatic test chamber.
MPEG-4 – a standard introduced in 1998 as a replacement for MPEG-1 and MPEG-2. The standard includes several new functions providing flexible quality and compression ratio coding. Codec implementation depends on the programmer decision, and the application capabilities are determined by profiles and levels used.
NCQ is a software-based extension of SATA interface in which received read and write commands are queued to improve efficiency (number of I/O per second) of both HDDs and SSDs.
OFDM – an orthogonal frequency-division multiplexing is a method of encoding digital data on multiple orthogonal carrier frequencies to eliminate the multi-path propagation and intersymbol interferences.
An optical waveguide is a physical structure guiding the electromagnetic waves in the optical spectrum. The optical waveguides are made of highly symmetrical dielectrics including a light-propagating core surrounded by a dielectric material (jacket) with a refractive index n lower than the core.
The optical radiation is presented as an electromagnetic wave. Waves of all lengths compose the radiation spectrum, and the dedicated lengths form the range. In other words, the wavelength is a distance between two repeating wave elements. See more...
PAL (Phase Alternating Line) – an analogue television video broadcast system. The system was created as an improvement of NTSC standard for use in Europe, Africa and several Asian countries.
Vpp (peak-to-peak voltage) is a peak-to-peak voltage. A parameter measured between the maximum signal amplitude value and its minimum value over a single period.
PET - Polyethylene terephthalate is a semi-crystalline, high-strength and high-ductility polymer with excellent machinability and UV resistance properties, good electrical insulation and sound attenuation properties.
Ping – a common name for a mechanism testing the computer network; it uses a basic working principle similar to echolocation (to ping - means to use the ping mechanism).
Power over Coaxial (PoC) is a technology that supports simultaneous transmission of power, high-resolution analogue video signal and OSD control signal over coaxial cable at the distance of up to 400 m.
Current efficiency of the power supply is the maximum current the power supply should supply to the load, while maintaining all the parameters specified in the data sheet (output voltage, power etc.) and operating within the operating conditions (temperature, humidity etc.).
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