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Understanding Multimedia Elements in Web Design

Introduction to multimedia elements used in web pages including images, voice, music, animation, video, and text. Learn about digitalization, bandwidth, data compression, file formats, and viewer capacity considerations. Explore different media formats and accessibility guidelines.

thaddeus-cortez
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Understanding Multimedia Elements in Web Design

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  1. Multimedia in Web Introduction

  2. Multimedia Elements in Web Page • Images • Voice • Music • Animation • Video • Text & Numbers

  3. Digitalization • Contents  Numbers (0’s & 1’s) • For computers and the Internet • Different media originated and developed differently, e.g. sound & image  Different formats • Accessibility: http://www.w3c.org/WAI/

  4. Pixels • Picture element • Values in color and brightness

  5. Role of Bandwidth • Volume of data can transmit in one second • 56K (Dial-up) • ISDN 128 Kbits/sec • DSL and Cable (Broadband) 512 Kbits/sec • T1 1.5 Mbits/sec • Ethernet 10-100 Mbits/sec

  6. Data Compression • Digitalization  Compression  Decompression • Codecs = Compression + Decompression • Removing repetition: e.g. 405 405 405 405 405 405 X 5

  7. Averaging: e.g. 378 379 378 376 378 X 4 • Range Reduction: e.g. 8 bit (256)  6 bit (64) Sound loudness can be expressed in 256 levels or 64 levels.

  8. File Formats • Images • GIF • JPEG • PNG • Sound • AIF (Audio Interchange File) • QuickTime

  9. Video • QuickTime (mov) • Window Media • RealVideo • Animation • Flash

  10. Viewer Capacity Consideration • Bandwidth • Speed test at http://sea.speakeasy.net/ • Screen size & resolution • 640 X 480 pixel screen • Processor • Video System, Ram, & BUS • Firewall • Plug-Ins: e.g. Flash Player • Browser

  11. Experience • Find types of images used • Go to http://www.moma.org/ • Right-click on images  Properties • Movies: • http://www.atomfilms.com/ • http://www.ifilm.com/

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