How Computer Video Adapters Work

By: Jim Samposzi Click author's name for more of his/her articles

When someone is checking out a video clip or movie, he/she are usually unaware of the forces at work behind the cover to bring the clip to the eye. There is much more than just analyzing, playing, and displaying the images to the screen. Whether it is a simple text animation or an involved video rendering, video cards allow you to view videos and other media on the computer.

A component of this kind is sometimes named: display adapter, graphics card, or graphics accelerator card. In essence, the processor picks up the input from the tray and sends it to the video card, in the on-board slot, to process the data and return the desired video. This process happens seamlessly and the person watching the screen has no idea of the many parts that are processing and translating this data.

Computers include small ports that video devices or media plug in to. These inputs basically connect the device to the computer so that it can send video to it for processing and display. Some of the more common methods for output are:

* Video Graphics Array (VGA) â€“ This is common to many computers and is not seen on machines today. It looks similar to a rectangle or circle slot with holes in the middle. This is the oldest of output for video technology and is obsolete because the quality is horrible.

* Video In / Video Out (VIVO) and S-Video â€“ This series of sockets allow for 3-D rendering through an exact translation of resolution. These kind are seen more in computers nowadays and support a perfect view, LCD, and plasma. The socket round and have dots in the middle. Most desktops label this as S video.

* High-Definition Multimedia Interface (HDMI) â€“ This interconnect for digital audio and video is a bit newer and supports games and movie files. This type of connection also restricts copying of copyrightable materials.

* Display Port â€“ The display port is the newest technology for video capability and is said to be on the cusp of taking over all other connections. It supports real-time video rendering that is clear and smooth.

Whatever connection is being put to use, computers all process video on a card like any other computer interaction does. The chip set of the card has the parts that make it work. These components include: video bios, video memory, and RAMDAC (Random Access Memory Digital to Analog Converter). The video bios exists as a simple outline of how the computer is to handle video. The video memory then begins to aid the video clip so that it is uninterrupted and without any blips. Lastly, the RAMDAC has to translate the analog signal to one of a digital data type so the screen can play the video. Even though PCs donâ€™t necessarily need RAMDAC, due to the introduction of monitors with RAMDACs already in them, though all computers still need it to play and display the video.

Not all individuals that play videos know what is at work in the background to make it possible. Most take advantage of being able to see a video at the click of a button. The processes aforementioned calculate so quickly that you donâ€™t even see it. However, there are so many actions taking place under the computerâ€™s cover.

Article Source: ABC Article Directory

About The Author: Jim Samposzi is a journalist with over twenty years of editorial experience. Jim is presently engaged as a national correspondent for many well-known b2b portals and is considered the company guru on computer peripherals. Visit our great website for more information on Video Card and Graphics Cards.