FLEX4ML
User Manual
37
●
Genlock:
Allows synchronisation of otherwise video devices. A signal generator provides a signal
pulses which connected devices can reference. Also see Black Burst and Color Burst.
●
Blackburst:
The video waveform without the video elements.It includes the vertical sync,
horizontal sync, and the Chroma burst information. Blackburst is used to synchronize video
equipment to align the video output.
●
ColourBurst:
In colour TV systems, a burst of subcarrier frequency located on the back part of the
composite video signal. This serves as a colour synchronizing signal to establish a frequency and phase
reference for the Chroma signal. Colour burst is 3.58 MHz for NTSC and 4.43 MHz for PAL.
●
Colour Bars
：
A standard test pattern of several basic colours (white, yellow, cyan, green, magenta,
red, blue, and 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 4Kand8Ktelevision standardswith a16:9
ratio, UHD follows the 2K HDTV standard. A UHD 4K displayhasaphysicalresolutionof3840x2160
which is four times the area and twice both the widthandheightofaHDTV/FullHD(1920x1080) video
signal.
