Video monitor

Video monitor

A video monitor also called a broadcast monitor, is a device similar to a television, used to monitor the output of a video-generating device, such as a media playout server, IRD, video camera, VCR, or DVD player. It may or may not have audio monitoring capability. Unlike a television, a video monitor has no tuner and, as such, is unable to independently tune into an over-the-air broadcast. One common use of video monitors is in Television stations and outside broadcast vehicles, where broadcast engineers use them for confidence checking of signals throughout the system. Video monitors are used extensively in the security industry with Closed-circuit television cameras and recording devices.

Another important reason why broadcast monitors must be used for video compliance at television or production facilities is they do not perform any video enhancements and try to produce as accurate an image as possible. For quality control purposes, it is necessary for a broadcast monitor to produce (reasonably) consistent images from facility to facility, to reveal any flaws in the material, and also not to introduce any image artifacts (such as aliasing) that is not in the source material. Broadcast monitors will try to avoid post processing such as up-scaling, line doubling and any image enhancements such as dynamic contrast. However, display technologies with fixed pixel structures (e.g. LCD, plasma) must perform image scaling when displaying SD signals as the signal contains non-square pixels while the display has square pixelscite web|url=http://broadcast-monitors.glennchan.info/scaling-artifacts/scaling-artifacts.htm|title=Scaling artifacts and resolution|last=Chan|first=Glenn|date=2008|work= [http://broadcast-monitors.glennchan.info Broadcast Reference Monitors] |accessdate=2008-10-01] . LCDs and plasmas are also inherently progressive displays and may need to perform deinterlacing on interlaced signals.

Professional video broadcast monitors also display on screen, the current video signal format, they might be receiving i.e.: standard definition formats like 576i, 480i or high definition formats like 720p or 1080p. They also have buttons to toggle common aspect ratios like (4:3 or 16:9), and underscaning or overscaning a picture to see lines in the vertical blanking interval (VBI) of video, and check if subtitles in VBI were inserted properly or not. Modern broadcast grade professional monitors also have safe area grid generators, to help position television graphics, lower thirds, within their respective areas i.e. graphics safe, title safe or action safe.

Features

Professional Video monitors have various features that consumer monitors lack such as:

* Conforms to colorimetry standards such as the SMPTE C, Rec. 709, or EBU primaries.
* SDI inputs / outputs.
* AES/EBU Audio decoding.
* Genlock input.
* GPI interface - For receiving external triggers.
* Modular expansion cards that support SD-SDI or HD-SDI single link or dual-link HD-SDI.
* Safe area cage.
* Rack mountable.

Common display types for video monitors

* Cathode ray tube
* Liquid crystal display
* Plasma display

Common monitoring formats for broadcasters

* Serial Digital Interface (SDI, as SD-SDI or HD-SDI)
* Composite video
* Component video

Common monitoring formats for security

* Composite video
* S-Video

ee also

* Computer monitor
* Composite monitor

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Video monitor timeline — This timeline deals with video monitors ranging from television sets, computer monitors and others.*1950s first commercially marketed television sets. *1960s first commercially marketed color television sets. *1980s first composite… …   Wikipedia

  • Video monitor — A&V A high quality television set (without RF circuits) that accepts video baseband inputs directly from a TV camera, videotape recorder, etc …   Audio and video glossary

  • Video standards converter — is a video device that converts NTSC to PAL and/or PAL to NTSC.The PAL TV signals may be transcoded to or from SECAM.Video standards converter is used so TV shows can be viewed in nations with different video standards.Main Page see Television… …   Wikipedia

  • Video game arcade cabinet — A video game arcade cabinet, also known as a video arcade machine or video coin op, is the housing within which a video arcade game s hardware resides. Most cabinets designed since the mid 1980s conform to the JAMMA wiring standard. Some include… …   Wikipedia

  • Video assist — Actor Gunner Wright appears on a video assist monitor during the filming of the 2011 movie Love. Video assist is a system used in filmmaking which allows filmmakers to view a video version of a take immediately after it is filmed. Originally a… …   Wikipedia

  • Video game — Computer and video games redirects here. For the magazine, see Computer and Video Games. For PC games specifically, see personal computer game. For Console games specifically, see console game. For the Lana Del Rey song, see Video Games (song) …   Wikipedia

  • Video arcade — A video arcade (also known as an amusement arcade in the United Kingdom, nihongo|game center|ゲームセンター|gēmusentā in Japan, or as an arcade ) is a venue where people play arcade video games that are housed in colourfully decorated cabinets. The… …   Wikipedia

  • monitor —    In computer activities, a device that accepts video signals from a computer, and displaysanimation of snow on a video monitor images and text on a screen as they are generated by the computer. [Chances are good you re looking at one right… …   Glossary of Art Terms

  • monitor — I n. 1) an electronic; heart monitor 2) a video monitor (for a computer) II v. to monitor closely * * * [ mɒnɪtə] heart monitor an electronic to monitor closely a video monitor (for a computer) …   Combinatory dictionary

  • Monitor de computadora — Monitor LCD. La pantalla del ordenador o monitor de computadora es un visualizador que muestra al usuario los resultados del procesamiento de una computadora mediante una interfaz. == Historia ==angel calderon Los primeros monitores surgieron en… …   Wikipedia Español

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”