Tips & Definitions:
Multimedia is the use of several different media to convey information (text, audio, graphics, animation, video, and interactivity). Multimedia also refers to computer media. As the information is presented in various formats, multimedia enhances user experience and makes it easier and faster to grasp information. Presenting information in various formats is nothing new, but multimedia generally implies presenting information in various digital formats. It is also used in visual arts to describe works created using more than one medium.
Multimedia finds its application in various areas including, but not limited to, education, entertainment, engineering, medicine, mathematics, and scientific research. In education, multimedia is used to produce computer-based training courses (popularly called CBTs) and reference books like encyclopedias and almanacs. A CBT lets the user go through a series of presentations, text about a particular topic, and associated illustrations in various information formats. An electronic multimedia encyclopedia can present information in better ways than a traditional encyclopedia, so the user has more fun and learns more quickly. For instance, an article on World War II can include hyperlinks to articles on countries involved in the war. When users click on a hyperlink, they are redirected to an detailed article about that country. In addition, it can include a video on the Pacific Campaign. It can also present maps pertinent to World War II. Hyperlinks let a user access information in a non-linear fashion as opposed to print materials which are essentially linear. (It is said that our brains think in a non-linear way.) This can speed-up learning and improve the user experience, when added to multiple elements such as pictures, photos, audio and video. (It is also said that some people learn better by seeing than reading and some others by listening). Multimedia is heavily used in the entertainment industry, especially to develop special effects in movies and animation for cartoon characters.
Pixel (PIX [picture] ELement) Generally, the smallest addressable unit on a display screen or bitmapped image. Screens are rated by their number of horizonal and vertical pixels; for example, 1024x768 means 1024 pixels are displayed in each row, and there are 768 rows (lines). Likewise, bitmapped images are sized in pixels: a 350x250 image has 350 pixels across and 250 down. With color systems, each pixel contains red, green and blue subpixels, and the subpixel is actually the smallest addressable unit. The monitor's circuits address subpixels, and the software may also. Pixel Structures In storage, pixels are made up of one or more bits. The greater this "bit depth," the more shades or colors can be represented. The most economical system is monochrome, which uses one bit per pixel (on/off). Gray scale and color typically use 4 to 24 bits per pixel, providing 16 to 16 million colors. See bit depth. Displaying the Pixel On a display screen, pixels are either phosphor or liquid crystal elements. For monochrome, the element is either energized fully or not. For gray scale, the pixel is energized with different intensities, creating a range from light to dark. For color displays, the red, green and blue subpixels are each energized to a particular intensity, and the combination of the three color intensities creates the perceived color to the eye. See resolution and vertex shader.
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