AJA KONA 3G, Инструкция по установке и эксплуатации

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KONA 3G Installation and Operation Manual — Reference Terms
HDTV (High-
Definition
Television)
High Definition Television refers to the highest-resolution formats of the DTV formats. Offering twice
the vertical and horizontal picture resolution of standard definition, an HD picture is much sharper.
HDTV has a widescreen aspect ratio of 16:9. HD formats 1080i and 720p both offer reduced motion
artifacts like ghosting and dot crawl.
HD-SDI
Refers to a high definition signal provided on a serial digital connection.
High Definition
A video format consisting of either 720 active lines of progressive video or 1080 active lines, using
either progressive or interlaced scanning.
Interlaced
Scanning
A scanning method based on the visible screen showing every odd line at one scan of the screen
and the even lines in a second scan.
Letterbox
Letterbox refers to the image of a wide-screen picture on a standard 4:3 aspect ratio screen. Usually
black bars are shown above and below the picture to fill the unused space. Letter-boxing maintains
the original aspect ratio of the source (often a film source of 16:9 aspect ratio or wider).
Luminance
The brightness or black-and-white component of a color video signal. Luminance determines the
level of picture detail.
Progressive
Scanning
Progressive scanning provides a picture made up of 720 or 1080 horizontal lines scanned
progressively in succession, within a vertical frame. The frame repeats 30 times a second.
Resolution
Resolution usually refers to the density of lines, and dots per line, that represent an image. It is
measured by the number of pixels displayed. A higher number of lines and dots provides sharper
and more detailed picture content. Analog television pictures have over 200,000 color pixels while
HDTV—at 1080 vertical pixels by 1920 horizontal pixels—offer greater than 2 million pixels per
picture.
Sampling
A digital process by which analog information is measured in intervals to convert analog to digital.
SDTV (Standard-
Definition
Television)
Standard Definition Television pictures are higher quality than NTSC, however, they do not reach the
quality and resolution of HD. SDTV is based on 480 lines of vertical resolution, available with both
interlaced and progressively scanned formats.
SD-SDI
Refers to a standard definition signal provided on a serial digital connection.
Upconverting
Process by which a standard definition picture is changed to a simulated high-definition picture.
Widescreen
Widescreen TV is a picture with a 16:9 aspect ratio. 16:9 is the aspect ratio of movie screen and
widescreen DTV formats used in all HDTV (High Definition TV) and some SDTV (Standard Definition
TV); it stands for 16 units of width for every 9 units of height.