WAVEFORM MONITOR
WEIGHTED S/N RATIO
WHITE BALANCE
WHITE LIMITER
WHITE NOISE
WI-FI
WIDE SCREEN PROJECTOR
WIPING
WMF
WXGA, WSXGA
WAVEFORM MONITOR
A test machine similar to an oscilloscope designed to show composite or component video waveforms. Every video line may be selected for display and analysis. The waveform monitor helps fine-tune equipment in a video or TV studio and is very useful in locating problems encountered using complex video equipment. It is sometimes integrated into a Vectorscope.
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WEIGHTED S/N RATIO
The ratio of signal to noise level after mathematical manipulation. The mathematical calculation for audio takes into account the frequency response of human hearing, and for video the limitations of the human eye and the TV/monitor characteristics. This number is usually higher by a few Decibels than the standard S/N ratio (shows better results).
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WHITE BALANCE
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WHITE LIMITER
A device which electronically limits the maximum \''white\'' level of a video signal, in order to avoid \''over-burned\'' images on the screen.
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WHITE NOISE
Audio noise with randomly variable amplitude and frequency. It is made up of uniform sounds of the entire audio spectrum, hence the term “white”, like white light which is a mixture of all the different colors (frequencies) of light.
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WI-FI
Wireless Fidelity. A certification that approves 802.11 devices which are interoperable and therefore allowed to use the Wi-Fi logo.
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WIDE SCREEN PROJECTOR
A display device that projects a video or computer image on a large screen, mainly for public viewing. The first wide screen projectors had very poor quality and brightness, but today, quality and brightness is very good. The classic wide screen projector has three color tubes - red green and blue, and the image is created on the screen by blending the three colors. One of the most common problems encountered with wide screen projectors was poor alignment of the three tubes. In most high quality projectors, the alignment required to get a good superimposition of the three images on the screen is almost automatic and is much easier than in the past. LCD (Liquid Crystal Display) TFT driven screens, which eliminate alignment problems completely, became the heart of a new series of wide screen projectors. The TFT based projectors offer better price/performance ratios than three tube projectors. Another new generation of projectors is based on DLP / DMD (Digital Micromirrors Device) technology in which a semiconductor chip is covered with hundreds of thousands of micro mirrors that change their angle to a beam of light shining on them. This system creates an image that is much more saturated and has more contrast.
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WIPING
A process in which one picture is electronically wiped off the screen and replaced by another. In special effects generators there are numerous wipe patterns varying from simple horizontal and vertical wipes to multi-shaped, multi-colored arrangements.
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WMF
Windows Metafile Format. A graphics vector file format developed for Microsoft Windows®, useful in DTP and graphics application.
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WXGA, WSXGA
Wide (Super) eXtended Graphics Array. Wider than XGA formats, with 16:9 aspect ratio. WXGA varies between 1366X768 pixels resolution to 1280X720 pixels and WSXGA varies between 1920X1080 pixels to 1600X900. Used in some home theater video projectors for outputting a wide image on the screen.
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