GAMMA
GAMMA CORRECTION
GANGED FADING
GEM
GENERATION
GENERATION LOSS
GENLOCKING
GRAPHIC FILE FORMAT
GRAPHICS CO-PROCESSOR / ACCELERATOR
GROUND LOOP
GROUP DELAY
GAMMA
(рус. ГАММА)
The light emitted fr om a CRT is not linearly proportionate to the electric signal levels driving it, thus a distortion is created in the image shown on the screen, wh ere contrast loses its linearity. This non-linearity is expressed by an exponential function called Gamma.
0

GAMMA CORRECTION
A process used in video and computer graphics images to correct internal microcontrast within the image and brightness. For example, Gamma correction can change the ratio in an image between the brightest, specific color component, and the weakest.
0

GANGED FADING
When two signals, such as audio and video signals, are concurrently processed, simultaneous fading is required. This technique is known as ganged fading.
0

GEM
A graphics metafile format, vector based, which was developed by Digital Research™ and is used in DTP and graphics applications.
0

GENERATION
The number of duplication steps between a master recording of videotape and a given copy of that master. A second-generation duplication is a copy of a copy of the original master.
0

GENERATION LOSS
When master analog videotape is duplicated, the second-generation copy is usually inferior in quality to the master. This depreciation, known as generation loss, appears as distortion, lack of details, improper colors, etc. The limited frequency response of video and audio magnetic tapes and the imperfections in electronic circuitry are the main causes of generation loss. Video enhancing equipment is intended to eliminate or reduce generation loss. High quality video processors pre-enhance the video signal to overcome generation loss. Digital video recording and editing are essentially immune to high frequency generation loss, but are prone to instability and other synchronization-related problems.
0

GENLOCKING
A system for synchronizing two video signals to the same timing and color phase in order to coordinate their colors and syncs. Genlocking permits mixing, cross fading, keying and special effects generation between the two signals. A video camera can be genlocked to a second camera through the genlock connector on the camera. All professional cameras have genlocking capabilities. Genlocking two VCRs is more difficult and requires the intervention of a sophisticated device called a time base corrector (TBC) or a framer synchronizer.
0

GRAPHIC FILE FORMAT
Graphic images, whether computer generated or video generated can be stored on a disk for further use employing one of the standard storage formats. There are several formats, each with its advantages and disadvantages. The user should decide which format is best for his purposes by comparing the features of the formats available. Some popular formats used are – JPEG, TIFF, GIF, TARGA, PCX and EPS.
0

GRAPHICS CO-PROCESSOR / ACCELERATOR
A special, dedicated microprocessor installed in a computer graphics card, which takes over most of the graphics work from the main computer microprocessor. As the graphics co-processor deals only with graphics work, the speed of graphics operation is substantially accelerated, which is necessary for computer generated animation and fast computer graphics display. Nowadays, “3D” graphics processors with many-megabyte graphics RAM (memory) exist on almost every graphics card, enhancing and accelerating 3D PC games as well as any other PC graphics work.
0

GROUND LOOP
Interference that in video may show on the screen as \''crawling\'' vertical bars. A ground loop is created when two elements in a circuit - or two different machines connected together - receive their ground reference signal fr om different places. A different ground potential (voltage) creates this loop, interfering with the signal. Special ground-isolation devices are needed to cure the problem. Ground loops are also a problem in audio, wh ere their most disturbing effect is a low frequency oscillation known as \''hum\'' or \''motorcycling\''. Some audio related ground loop problems can be cured by properly reconnecting the ground leading cables to a single point, usually at the most sensitive input area, or at the power supply. Such problems emerge mainly when high amplification is needed, such as when microphones or other sensitive pick-ups are connected to the system.
0

GROUP DELAY
A phenomenon occurring in poorly designed electronic equipment where there is a variable delay in the transmission of information through the circuit. In video, when several signals are transmitted together and some arrive before others as a result of group delay, the video picture is distorted. For example, in low quality video processors, there may be a substantial delay between the transmission of color and black and white information. The color part does not overlap on the black and white part and a double image or shadows occur, as well as image blur. Good quality video processors automatically compensate for group delay. Group delay may also be invoked in long connecting cables or RF transmission.
0

Логин:
Пароль:
Контакты | ISO | Гарантия | Обработка персональных данных
Copyright © Kramer Electronics LTD. 1981—2017.
Yandex.Metrica