MULTIMEDIA

The previous of windows and DOS were not designed to support multimedia, therefore the multimedia presentations were either not running very slowly. With Windows 95, things are improved as it supports multimedia at the base level, as discussed below;

• Multimedia presentation require more than one media, and Windows 95 is a 32 bit, Multitasking and multithreading operating system. This assure plating more than one media smoothly and more responsive to user interaction.
• During installation procedure of Windows 95, it automatically detects and configures itself for multimedia devces.
• Windows 95 allows you to create compounded documents that include sound, video, graphics, charts, pictures, and other elements from various applications.
• A new CD-Rom file system in Windows 95 improves CD-Rom performance. 

Multimedia types;

The different media types are either audio or visual. Multimedia information is stored in sound, video, or MIDI file format.

Audio;

Recording and playing back sound were the first multimedia application fro personal computers. With the help of installed sound card, you could record a voice, store it in file on disk and play back the same sound on another computer. Music and sound can be recorded for computer generated presentation.

WAVE audio- Actual sound waves are recorded and converted to digital data;

MIDI Audio- It is the recording of keystrokes or other actions that direct synthesis and the MIDI compactable electronic Music devices to generate sound. Thus these files are similar in size.

Videos:

This media includes the following files;

Animation-The first thing that comes in mind are the animation movies like jungle book. Animation is the images that move on the screen. The animation movies include these kinds of images and sound.

Video-The videos pictures can be recorded from cameras or laser discs into a computer and store it on the disk. To capture High quality video and store it efficiently these files needed to be compressed.

PC HARDWARE

Introduction

A computer is defined as an electronic data processing machine. It receives and stores large amount of information and process them at a high speed according to the given instructions.

Apple computer was the first successful micro computer developed by steeve jobs and steeve wolzniak in 1977.

Depending upon the hardware features like microprocessor used, memory capacity, secondary storage devices, processing speed etc., the computers are classified as follows.

• PC or Personal computer

• PC-XT or personal computer with extended Technology.

• PC-AT or personal computer with advance technology.

• PC- Pentium

Evolution

PC through Pentium

PC – Personal computer

Background

In august 11, 1981 IBM Corporation introduced its first Pc. This project was completed by a team of IBM engineers named as group 13. It operates on +5v power supply. It has two operating modes namely minimum mode and maximum mode. It has no hard disk.

Features;

1.      It used Intel 8088 cpu at 4.77 MHz

2.      It has 16-bit ALU and registers.

3.      It has 8-Bit data bus and 20-bit address bus.

4.      It has 63.5 watts power supply

5.      It has socket  for 8087 co-processor

6.      It supports DMA controlled data teraserver

7.      It has 14 inch monochrome display

8.      It has 81 keys keyboard

9.      It has one or two floppy disk drivers of 360kb capacity.

10.  It uses 640 Kb RAM…..