1. Chapter 6: Digital Media for Work and Leisure
Succeeding with Technology: Second Edition

2. Succeeding with Technology
Objectives
Understand the uses of digital audio and today’s digital music technologies
Describe the many uses of 2D and 3D digital graphics and the technologies behind them
Explain the technologies available to acquire, edit, distribute, and print digital photos, and list new advances in video technologies and distribution
Discuss how interactive media is used to educate and entertain
Succeeding with Technology

3. Digital Music and Audio
Digital audio
Any type of sound recorded and stored digitally as a series of 1s and 0s
Digital music
Subcategory of digital audio that involves recording and storing music
Digitization of music and audio
Has created new challenges to the creative and intellectual property rights of artists
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4. Digitizing Music and Audio
Sound
The displacement of air particles caused by vibration and sensed by the eardrum
Analog
Signals that vary continuously
Sampling
Used to encode sound wave as binary numbers
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6. Digital Sound for Professionals
Digital voice recorders
Used to capture dialog for future reference
Digital sound in scientific research
Have used digital audio to study various natural phenomena
Digital sound in law enforcement
Uses digital processing to denoise, enhance, edit, and detect sounds
Digital sound in entertainment and communication
Uses a wide variety of audio hardware and software
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8. Digital Music and Audio Production – Professional Music Production
Multitrack recording devices
Treat each instrument or microphone as a separate input, or track
Synthesizer
Electronically produces sounds designed to be similar to the sounds of real instruments
Sampler
Digitally records real musical instrument sounds
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9. Digital Music and Audio Production (continued)
Sequencer
Allows musicians to create multitrack recordings
Musical instrument digital interface (MIDI) protocol
Implemented in 1983
Provides a standard language for digital music devices to use in communicating with each other
Integrated digital studios
Package many digital recording devices in one unit for convenient home recording
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11. Digital Music and Audio Formats, Storage Media, Players, and Software
Digital music and audio file formats
Most often distributed on CDs
Increasing trend towards distribution over Internet
Digital music and audio storage media
Burned to CD in special format designed for audio CDs
Digital music, audio players, and software
Media player software (iTunes)
Portable MP3 players
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12. Digital Music and Audio Distribution
Illegal downloading and copying
Said to have cost music industry $6 billion between 1998 and 2003
Caused a loss of 22 percent of the entire music market
Apple’s iTunes
First service to capture attention of music downloaders
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13. Digital Music and Audio Distribution (continued)
Big four online music services
iTunes, MSN Music, Napster, and Rhapsody
Streaming audio
Internet technology that plays audio files as they are being delivered
Digital rights management (DRM)
Technology invented to protect intellectual property in digital files
Satellite radio
Digital radio that uses satellite communications
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Digital Graphics
Computer-based media applications that support
Creating, editing, and viewing 2D and 3D images and animation
Not the exclusive domain of artists
Artistic and nonartistic people
Are finding themselves called upon or inspired to create digital artwork
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Digitizing Graphics
Pixels
A grid of small points
Bit-mapped graphics or raster graphics
Representing an image using bytes
Ideal for representing photorealistic images
Pixilation or fuzziness
Occurs when bit-mapped images are made larger than the size at which they are captured
Vector graphics
Use bytes to store geometric descriptions
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Graphics File Formats
Standards
Windows bitmap (.bmp)
Graphics Interchange Format (.gif)
Joint Photographic Experts Group (.jpg or .jpeg)
Portable Network Graphics (.png)
Tagged Image File Format (.tiff or .tif)
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20. Graphics File Formats (continued)
Lossless compression
Allows the original data to be reconstructed without loss
Lossy compression
Accepts some loss of data to achieve higher rates of compression
File sizes and image quality
Can be controlled by adjusting the color depth
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22. Uses of Digital Graphics
Digital art
Uses computer software as the brush and the computer display as the canvas
Scientific visualization
Uses computer graphics to provide visual representations that improve our understanding of some phenomenon
Computer-assisted design (CAD) software
Assists designers, engineers, and architects in designing three dimensional objects
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25. Vector Graphics Software
Provides tools to create, arrange, and layer graphical objects on the screen
Vector graphics
Uses object-oriented approach that recognizes pictures as being made up of layers of multiple objects
Primary benefit of object-oriented approach of vector graphics
Objects in the picture can be manipulated independently
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28. Three-Dimensional Modeling Software
3D modeling software
Provides graphics tools that allow artists to create pictures of realistic 3D models
Three-dimensional modeling
Takes the object oriented approach of vector graphics to the next level
Ray tracing
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Computer Animation
Digital graphics animation
Involves displaying digital images in rapid succession to provide the illusion of motion
Animated graphics
Employ either 2D or 3D objects
Animated GIF
The most basic form of animation
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32. Digital Photography and Video – Digital Photography
Digital photos
Created, or acquired, using a digital camera
Digital cameras
Ranked by the amount of megapixels they can capture
Memory cards that come with digital cameras
Often have limited capacity
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35. Digital Photography (continued)
Photo-editing software allows you to
Alter the hue and saturation of the colors in the photograph
Smooth surfaces or remove flaws in surfaces.
Remove “red eye”
Smooth edges and sharpen focus
Crop and realign photos
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Digital Video
Is becoming increasingly accessible for personal enjoyment as well as professional use
Used to review the movement of athletes and determine how to perfect their abilities
Used to study pedestrian and traffic patterns
Forensic graphics
Used to create animations and exhibits to use in courts of law
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39. Digital Video (continued)
Video-editing software
Allows professional and amateur videographers to edit bad footage out and rearrange the good footage
Storyline
Allows videographer to arrange video scenes sequentially and
Specify the transition effects between each scene
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Interactive Media
Digital media presentations that involve user interaction for education, training, or entertainment
Typically combines digital audio and digital video for a full digital media experience
Virtual reality
Occurs when interactive media incorporates 3D graphic animation
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43. Education and Training
Interactive media is being used in many education environments
In the traditional classroom setting
In distance learning
In museums
In skills training
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44. Commercial Applications of Interactive Media
Role of interactive media
In Web-based e-commerce
Provides fundamental technology for 3D product viewing
Used to provide product support and customer training
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46. Interactive Video Games
Video game consoles
High-powered multiprocessor computers designed to support 3D interactive multimedia
Video game development requires a team effort from specialists in a variety of areas
Game designers
Artists, sound designers
Programmers, and testers
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Interactive TV
A 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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Summary
Digital audio
Includes both digital music and digital sound
Sound wave
Can be represented with numbers, digitally, through a process called analog-to digital conversion (ADC)
Digital graphics
Computer-based media applications that support
Creating, editing, and viewing 2D and 3D images and animation
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Summary (continued)
Digital photos
Acquired from a digital camera or scanner
Photo-editing software
Provides editing tools for manipulating, enhancing, and repairing digital photographs
Interactive media
Multimedia presentations that involve user interaction for education, training, or entertainment
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