Multiprocessor

A multiprocessor is a computer system with two or more processors coupled together. These processors can access uniform memory space. The unit which performs computation is known as processing element. Scientific and business community extensively uses multiprocessor embedded systems. These systems offer real time performance, low power consumption and are highly economical. Most of the battery powered devices are based on multiprocessors which give high performance at very low energy rates. An accelerator is attached to CPU buses in an embedded multiprocessor. This accelerator helps to achieve quick execution of certain key functions. They can also provide superlative performance with computational kernels that spend a great deal of time in a small section of code. Accelerators can also be used for speeding up of low latency input/output functions. The communication between CPU and accelerator is through data and control registers. Control registers allow the CPU to fine monitor the accelerator’s operation and to give the accelerator commands. Communication between CPU and accelerator is also possible via shared memory.

Multimedia

Multimedia technology is growing faster in all fields. Multimedia effectively deals the computer-controlled integration of text, graphics, drawings, still and video images, animation and audio information. For creating a text file, word processing software like Microsoft Word is used. These text files are then imported to multimedia tools to integrate with other multimedia elements. Graphic is a generic term used often to describe the pictorial representation of data. Keyboard, mouse and trackball are graphic input devices. Graphic images can be modified by using software like Adobe Photoshop, Freehand and Corel Draw. The five methods of graphics are background, 2D graphics, 3D graphics, flowcharts and charts and graphs. Vibration of air molecules which can be sensed by human ear is audio. Transmission of mechanical vibration by an elastic medium is included in audio. Video comprises of moving picture accompanied by sound.  Animation is the process of sequencing still images in rapid succession to the effect of live motion.