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black) as a reference for system alignment and testing. In NTSC video, the most commonly used colour bars are
the SMPTE standard colour bars. In PAL video, the most commonly used colour bars are eight full field bars. On
computer monitors the most commonly used colour bars are two rows of reversed colour bars
●Seamless Switching: A feature found on many video switchers. This feature causes the switcher to wait until the
vertical interval to switch. This avoids a glitch (temporary scrambling) which often is seen when switching between
sources.
●Scaling: A conversion of a video or computer graphic signal from a starting resolution to a new resolution.
Scaling from one resolution to another is typically done to optimize the signal for input to an image processor,
transmission path or to improve its quality when presented on a particular display.
●
PIP:
Picture-In-Picture. A small image within a larger image created by scaling down one of image to make it
smaller. Other forms of PIP displays include Picture-By-Picture (PBP) and Picture- With-Picture (PWP), which are
commonly used with 16:9 aspect display devices. PBP and PWP image formats require a separate scaler for each
video window .
● HDR: is a high dynamic range (HDR) technique used in imaging and photography to reproduce a
greater dynamic range of luminosity than what is possible with standard digital imaging or photographic
techniques. The aim is to present a similar range of luminance to that experienced through the human visual
system.
●UHD:
Standing for Ultra High Definition and comprising
4K and 8Ktelevision standards with a 16:9 ratio, UHD
follows the 2K HDTV standard. A UHD 4K display has a physical resolution of 3840x2160 which is four times the
area and twice both the width and height ofaHDTV/FullHD (1920 x1080) video signal.
●EDID: Extended Display Identification Data. EDID is a data structure used to communicate
video display
information, including native resolution and vertical interval refresh rate
requirements, to a source device. The source
device will then output the provided EDID data, ensuring proper video image quality.
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