(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. Multimedia Literacy (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved.

(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. Learning Objectives Define Multimedia and describe why it is effective, and explain how Multimedia will be important to life in the twenty-first century Show how Multimedia is changing Show how the use of Multimedia is growing in business, industry, homes, online services, and education (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 2

Learning Objectives (cont.) Identify and define the components of a Multimedia PC Define the Internet and the World Wide Web and understand how they provide access to multimedia resources on a worldwide basis (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 3

(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. Overview What Is Multimedia? Why Is Multimedia Important? How Fast is Multimedia Growing? How Is Multimedia Changing the World? (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 4

(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. Overview (cont.) Who Needs to Know About Multimedia? What Is a Multimedia PC? What Is the Internet? What Is the World Wide Web? (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 5

(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. What Is Multimedia? Multimedia is the use of a computer to present and combine text, graphics, audio, and video with links and tools that let the user navigate, interact, create, and communicate (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 6

Why Is Multimedia Important? A fast emerging basic skill Adds dimensions Is a dynamic experience Allows cross-referencing through linking Information Superhighway (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 7

Multimedia Is Highly Effective People retain 20% of what they see 30% of what they hear 50% of what they see and hear 80% of what they see, hear, and do simultaneously (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 8

How Fast Is Multimedia Growing? At the end of the twentieth century nearly two-thirds of U.S households have home computers Digital divide is narrowing eMarketer forecasts 350 million Internet users by 2003 (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 9

How Fast Is Multimedia Growing? (cont.) Multimedia Growth is fueled by: Advances in technology Price wars New tools enabling more people to become developers (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 10

How Is Multimedia Changing the World? Mergers and Alliances Telecommuting Home Shopping Business and Advertising (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 11

How Is Multimedia Changing the World? (cont.) Electronic Publishing Teaching and Learning Mass Media (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 12

Who Needs to Know About Multimedia? Who needed to know how to read books after the printing press was invented? Who needed to know how to drive cars after highways got built? Who needed to know how to call someone when telephones were invented? (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 13

Who Needs to Know About Multimedia? (cont.) Anyone who plans to learn, teach, work, play, govern, serve, buy, or sell in the information society needs to know about multimedia (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 14

(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. What Is a Multimedia PC? RAM and MB (megabytes) Byte is the unit of measure for computer memory Processor and MHz Hertz is one instruction cycle per second Hard Drive Magnetic storage device Measured in MB (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 15

What is a Multimedia PC? (cont.) CD-ROM Can hold appr. 680 MB of data DVD Can hold up to 17 GB of data Can also play back CD’s 8-Bit and 16-Bit Sound A stream of bits represents the sound wave The more bits, the higher the dynamic range of the music (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 16

What is a Multimedia PC? (cont.) Synthesizer, Wavetable, and MIDI Playback MIDI encodes performance information MIDI often involves external equipment MIDI synthesizer allows playback without external equipment Wavetable contains numbers that describe the sound MPEG Digital video standard (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 17

(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. What is the Internet? Worldwide connection of computers that use the Internet Protocol (IP) to communicate IP was invented for the U.S. Department of Defense Advanced Research Projects Agency (ARPA) No central computer is in control (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 18

What is the Internet? (cont.) Every computer has a unique IP address Domain Name System (DNS) is an alphabetic translation scheme for IP addresses Top-level domains and country codes are predefined (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 19

(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. Top-level Domains .edu educational .com commercial .gov government .mil military .net network support centers .org other organizations (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 20

Seven New Top-level Domains .aero air-transport industry .biz business .coop cooperatives .info all uses .museum museums .name individuals .pro professions (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 21

What Is the World Wide Web? Networked hypertext system that allows documents to be shared over the Internet Developed at European Particle Physics Center (CERN) in Switzerland Original purpose was to make it easier for researchers to collaborate (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 22

(c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. Hypertext Coined by Ted Nelson (1965) Text is linked Links are clickable Computer launches the object associated with the link Adds a new dimension – hyper Web Browser is a graphical user interface to read hypertext documents (c) 2001 by The McGraw-Hill Companies, Inc. All rights reserved. 23