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© Xiamen RGBlink Science & Technology Co., Ltd.
Ph: +86 592 5771197
57
sessions between end points.
●MPEG: Moving Picture Experts Group is a working group formed from ISO and IEC developing standards that allow
audio/video digital compression and Transmission.
●H.264: Also known as AVC (Advanced Video Coding) or MPEG-4i is a common video
compression standard. H.264 was
standard
ized by the ITU-T Video Coding Experts Group (VCEG) together with the ISO/IEC JTC1 Moving Picture Experts
Group (MPEG).
●H.265: Also known asHEVC (High Efficiency Video Coding )H.265 is the successor to the widely used H.264/AVC
digital video coding standard.Developedundertheauspices of ITU,resolutions upto8192x4320may be compressed.
●
API:
An Application Programming Interface (API) provides a predefined function which allows accesscapabilities
andfeaturesorroutinesviaa
software or hardware, without accessing source
code or understanding the details of inner
workingmechanism. AnAPI call mayexecute a
function and/or provide datafeedback/report.
●
DMX512:
The communication standard developed by USITT forentertainment anddigital lighting systems.The wide
adoption of the Digital Multiplex (DMX) protocol has seen the protocol used for a wide
range of other devices including
video controllers.
DMX512 is delivered over cable of 2 twisted pairs with 5pin XLR cables for connection.
●ArtNet: An ethernet protocol based on TCP/IP protocol stack, mainly used in entertainment/events applications. Built
on the DMX512 data format, ArtNet enables multiple “universes” of DMX512 to be transmitted using ethernet
networks for transport.
●
MIDI:
MIDI is the abbreviation of Musical Instrument Digital Interface. As the name indicates the protocol was
developed for
communication between electronical musical
instruments and latterly computers. MIDI instructions are
triggers or commands sent over twisted pair cables, typically using 5pin DIN connectors.
●OSC:
The principle of Open Sound Control
(OSC) protocol is for networking sound
synthesizers, computers, and
multimedia
devices for musical performance or show control. As with XML and JSON, the OSC protocol allows sharing
data. OSC is transported via UDP packets between devices connected on an Ethernet.
●Brightness:
Usually refers to the amount or intensity
of video light produced on a screen without regard to colour.
Sometimes called black level.
●
Contrast
Ratio:
The ratio of the high light output level divided by the low light output level. In theory, the
contrast ratio of the television system should be at least 100:1, if not 300:1. In reality, there are several limitations.
Well-controlled viewing conditions should yield a practical contrast ratio of 30:1 to 50:1.
●
Colour
Temperature: The colour quality, expressed in degrees Kelvin (K), of a light source. The higher the
colour
temperature, the bluer the light. The lower the temperature, the redder the light. Benchmark colour temperature
for the A/V industryinclude5000°K,6500°K,and9000°K.
●
Saturation:
Chroma, Chroma gain. The intensity of the colour, or the extent to which a given colour in any image is free
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