1. Objectives
ITMA Lecture 05  Understand the value and use of digital audio in a
variety of career areas and in your life
Multimedia Application  Describe the many uses of 2-D and 3-D digital
graphics and imaging media
 Discuss how interactive media is used to educate
and entertain
K Ng
Fall 2008
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The Value of Digital Audio
 Digital audio
 Encompasses digital music and digital sound
 Digital music
 Any music that is stored digitally, regardless of how
it was originally created
 Digital sound
 The spoken word
 Other nonmusic sounds and sound effects that are
stored and manipulated digitally
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Digital Music Production
 Synthesizer
 Produces sounds designed to be similar to real
instruments
 Produces new sounds unlike any that a traditional
instrument could produce
 Sampler
 Digitally records real musical instrument sounds
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2. Digital Music Distribution Digital Music Production
(Continued)
 Digital music
 Burned to CD using a special music format for CD  Electronic drum machines
audio  Allow the musician to record drum beat patterns
 MP3 file format  Sequencer
 Compresses music files to less than 10 percent of  Allows musicians to create multitrack recordings
their original size  The musical instrument digital interface (MIDI)
 Sound compression protocol
 Implemented in 1983
 Removes frequencies that are beyond the range of
human hearing  Provides a standard language for digital music
devices to use
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Digital Music Distribution Channels
 Business-to-business (B2B) distribution
 Commonly conducted between music studios and
their customers
 Business-to-consumer (B2C) distribution
 Occurs through retailers selling CDs and online
services
 MP3 music file format
 Provides computer users with music files that are
small and easy to share
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The Value of Digital Graphics
 Digital art
 Uses computer software as paintbrush and the
computer display as the canvas
 Digital graphics
 Used as a form of creative expression
 Used as a means of visually presenting information
 Photographers and videographers
 Use digital graphics software to edit digital images
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3. Presenting Information Vector Graphics Software
 Web designers
 Provides tools to
 Specialists in creating attractive Web page designs
 Use graphics software to design buttons,
 Create, arrange, and layer graphical objects on the
backgrounds screen to create pictures
 Desktop publishing software  Vector graphics
 Design page layouts for magazines, newspapers,  Uses an object-oriented approach
books
 The primary benefit of the object-oriented approach
 Digital video
 Objects in the picture can be manipulated
 Being increasingly used to present news and
independently
information over the Web
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3-D Modeling Software
 Provides graphics tools that allow artists to
 Create pictures of 3-D, realistic models
 3-D modeling
 Often referred to as ray-tracing
 Rendering
 The process of calculating light interaction with the
virtual 3-D models in the scene
 3-D graphics
 Act as a foundation for other technologies
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4. Computer Animation Computer Animation (Continued)
 Digital graphics animation
 Displaying digital images in rapid succession  3-D computer animation
 Animated GIFs  Much more complex than 2-D computer animation
 Allow the artist to draw several images
 The complexity of 3-D graphic rendering, multiplied
 When played in succession, they create the illusion
by the necessity to render 24 3-D images per
of motion second
 Images are stored in one GIF file
 Flash  3-D computer animation software
 Provides a timeline tool used to cue movement in  Able to move animated characters according to
the animation direction of the artist
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Photo-editing Software
 Includes special tools and effects
 Designed for improving or manipulating bitmapped
photograph images
 Practical tools
 Altering the hue and saturation of colors in the
photograph
 Smoothing surfaces or removing flaws in surfaces
 Removing “red eye”
 Smoothing edges or bringing out of focus shots into
focus
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Creative Imaging Example – Gametap.com’s magazine ad.
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5. Creative Imaging Example – Singapore Telecom Engineering’s magazine ad.
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Digital Video Editing Interactive Media
 Video-editing software  Multimedia presentations that involve
 Allows editing of bad footage
 User interaction for education, training, or
 Rearranges good footage to produce professional- entertainment
quality video production
 Storyline allows the videographer to  Combines both digital audio and digital video media
 Arrange video scenes sequentially
 Specify the transition effects between each scene  Video games
 Forensic graphics  Make up a large portion of the interactive media
 Used to create animations and demonstrative market
exhibits
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Education and Training
 Authorware
 Used to produce interactive multimedia educational
tutorials
 Interactive multimedia is being used in
 The traditional classroom setting
 Distance learning
 Museums
 Skills-training
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6. Commercial Applications of
Interactive Multimedia
 Interactive multimedia
 Plays a large role in Web-based e-commerce
 The technology that underlies 3-D product viewing
 Used to provide product support and customer
training
 Playing a large role in attracting customers to Web
sites Demo link:
http://www.juniper.net/products/models/srx5800/index.html
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Interactive Multimedia Entertainment Interactive Multimedia
Entertainment (Continued)
 Video games
 Employ nearly every aspect of digital media  Game designers
 Gaming consoles on the market today  Develop the game’s theme, storyline, rules,
characters, and environment
 The Nintendo GameCube
 Game artists
 The Sony Playstation 2 (PS2)
 Use 2-D or 3-D graphics tools to develop game
 The Microsoft Xbox characters and backgrounds
 Video game consoles  Game sound designers
 Highpowered multiprocessor computers designed to  Provide background music, voices, and sound
support 3-D interactive multimedia effects
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Interactive Multimedia
Entertainment (Continued)
 Game Programmers
 Take all pieces and encode them into game
software
 Game testers
 Check the final product for bugs and glitches
 Provide feedback
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7. Interactive TV
 Digital television service that includes one or more
of the following:
 Video on demand
 Personal video recorder
 Local information on TV
 Purchase over TV
 Internet access over TV
 Video games over TV
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Interactive TV (Continued)
 Video On Demand (VoD)
 Customers can select from hundreds of movies to
watch at anytime
 Personal Video Recorders (PVR)
 Provide large hard drive storage to record movies
and programs
 Local Information on TV
 Provides local community news and information
 Internet Access over TV
 Viewers can navigate the Web on their television
sets
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What’s New in Multimedia? What’s New in Multimedia?
 2004—The Year of the iPod
 In 2004, more than 10 million people purchased digital
music players.
 2005—The Year of the Portable Media Center?
 Samsung and Creative released portable media players
which store and play music and video using Microsoft
Windows Portable Media Center software
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8. Latest Digital Media Centers… What’s New in Multimedia?
 Cell phone media
 Smart phones
 High-memory cell phones
 iTunes on cell phones
 Television on a cell phone?
 Handheld gaming gets serious
 The PlayStation Portable from Sony
 High-quality 3-D graphics in a handheld design
 HDTV
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Summary Summary (Continued)
 Digital audio
 Includes both digital music and digital sound
 Digital graphics
 Sound production  Media applications
 Important part of music, movies, radio, television,
 Used as a form of creative expression
video games, and the Internet
 Digital technology  Photo-editing software
 Applied to all aspects of the music industry  Editing tools for manipulating digital photographs
 The MIDI (Musical Instrument Digital Interface)
 Interactive media
 Implemented in 1983
 Provides a standard language for digital music  Multimedia presentations
devices
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