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How Computer Video Adapters Work

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by ▓▒░ TORLEY ░▒▓

When a person is viewing a video clip or entire video, he/she are not familiar with the forces at work behind the scenes to bring that video to their screen. There is good amount more than just reading, playing, and displaying the images to the screen. Whether it appears as a simple text animation or a complex 3-D rendering, video cards allow you to view videos and other media on the computer.

A computer video card is sometimes named: display adapter, graphics card, or graphics accelerator card. Basically, the CPU picks up the data from the file and sends it to the video card, in the tiny slot, to calculate the information and return a display to the monitor. This process happens like butter and you cannot tell the clips going through; the video streams smoothly.

Video cards usually have input areas in the back to support various devices or media players. These inputs basically connect the device to the computer so that it can send video to it for processing and display. Some of the typical ports for video input are:

* Video Graphics Array (VGA) – A VGA is ancient and is not seen on machines today. It looks like a rectangle or square slot with holes in the center. This is the ancient of this technology and is not used anymore because the quality is not as good.

* Video In / Video Out (VIVO) and S-Video – This type of ports generate 3-D rendering through an exact translation of resolution. These sorts of inputs/outputs are more commonly used today and support high definition, LCD, and plasma. The plug hole is round and contain dots in the middle. Most desktops label this as S video.

* High-Definition Multimedia Interface (HDMI) – This interconnect for digital audio and video is a bit more high-tech and supports gaming and DVD playing. This type of input allows for security over intellectual properties.

* Display Port – This is the newest technology for video capability and is known to be on the cusp of taking over all other connections. It supports streaming video rendering without any distortion.

Whichever the plug input/output used, computers all process video on a card like any other computer interaction does. The chip set of this card that make it do what it does. These components include: video bios, video memory, and RAMDAC (Random Access Memory Digital to Analog Converter). The video bios is a simple outline of how the computer is to handle video. The video memory then starts to help streaming. Lastly, the RAMDAC converts an analog signal to one of a digital data type so the screen can play the video. Although some computers no longer need RAMDAC, due to the creation of monitors with this capability already included, though all computers still need it to play and display the video.

Not all computer users who are accustomed to playing videos know what is happening behind the scenes. Most take advantage of being able to get to a video in a few easy steps. The processes above happen so quickly that the viewer never notices them. However, there is much more than meets the eye when you click play on your media player.

Jim Samposzi is a freelance writer with over 12 years writing experience. Jim is currently working as a journalist with our b2b site and has become the local specialist on video cards. Visit our useful website for additional information on Video Cards and Graphics Cards.
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