Digital Media for Work and Leisure
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Transcript of Digital Media for Work and Leisure
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Digital Media for Work and Leisure
Digital Music and Audio Digital Graphics Digital Photography and Video Interactive Media
Please discontinue use of cell phone and turn off ringer
Chapter 6
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Digital Media
Digital Media encompasses digital technologies of all kinds that serve and support digital music, video, and graphics.
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6.1
Digital Music and Audio
• Digital audio• Digital music• Synthesizer• Sampler• Sequencer
• MIDI• Podcast• Media player software• Satellite Radio
Key Terms
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Digital Audio and Music
Digital audio is any type of sound, including voice, music, and sound effects, recorded and stored digitally as a series of 1s and 0s.
Digital music is a subcategory of digital audio that involves recording and storing music.
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Digitizing Sound
Digital Music File 100101000100100100010010010010110001010101010100100100101001010001001001000100100100101100010101010101001001001010010100010010010001001001001011000101010101010010010010
30
20
10
0
-10
-20
-30 10 20
ampl
itude
Milliseconds (ms)
1. An analog sound wave is…
-10
-20
-30
30
20
10
0
10 20
2. “sampled” at regular time slice, and
10
-18
-10
-20
-30
30
20
10
0
30
-10
-28
-4
20
12
-4
-10
02
-1-3
42
-10
-18
0
20
3. stored as a sequence of numeric values… (30,-10,-28,-4,20,…)
A sound wave is sampled at predefined time intervals (sampling rate) the amplitude for each sample is stored as a binary number.
The sampling rate for audio CDs is 44,100 samples per second, whereas the sampling rate of your voice on a digital cell phone is 8000 times per second.
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Digital Sound For Professionals
Digital Voice Recorders are used in many professions to capture dialogue for future reference.
Digital audio is used in Science, Law Enforcement, Entertainment and Communications
Digital audio techniques are used in speech and voice recognition.
http://www.ntnu.no/gemini/2003-06e/19.htm
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Digital Sound For Professionals
Forensic audio uses digital processing to denoise, enhance, edit, and detect sounds to assist in criminal investigations.
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Digital Music & SoundSound Production Studio
Westlake Audio Studio in Hollywood, CA uses
millions of dollars worth of digital audio
equipment to produce music CDs, sound
tracks for motion pictures, and many
other audio services.
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Digital Music Production Tools
A synthesizer electronically produces sounds designed to be similar to the sounds of real instruments; they can also produce new sounds unlike any that a traditional instrument could produce.
A sampler digitally records real musical instrument sounds and allows them to be played back at various pitches using an electronic keyboard.
A sequencer allows musicians to create multitrack recordings with a minimal investment in equipment.
http://www.yamaha.com/musicproduction/
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MIDI
The musical instrument digital interface (MIDI) protocol provides a standard language for digital music devices to use in communicating with each other.
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Podcasting
A podcast is an MP3 audio file that contains a recorded broadcast distributed over the Internet.
A podcast aggregator is software that allows you to subscribe to podcasts.
http://www.podcastalley.com/ http://www.ipodder.org/
Record your own podcasts:http://www.jakeludington.com/podcasting/20050222_recording_a_podcast.html Windows: http://audacity.sourceforge.net/ Mac: http://www.apple.com/ilife/garageband/
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Discussion: Mainstream Media
vs. Consumer Generated Media
A blogger interview also see
http://www.current.tv
Dan Rather on http://www.cbsnews.com
PROS&
CONS
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Digital Audio File FormatsFile
ExtensionFormat Description
.aac
.m4pAdvanced Audio Coding
Apple compressed audio file format. A new compressed file format that is more efficient than MP3. Used with Apple’s iTunes music service.
.au Audio Audio file format used mostly on Unix and Apple operating systems.
.cda Compact Disc Audio
Used to store music on traditional music CDs using a storage technology different from typical computer files.
.mid MIDI File format containing MIDI commands to control keyboard synthesizers and other electronic instruments.
.mp3 MP3 A popular compressed audio file format used on file sharing networks and the Internet. Compresses .cda files by a factor of 10 - 14. http://entertainment.howstuffworks.com/mp31.htm
.ra Real Audio Format designed for streaming audio over the Web.
.wav Waveform Audio Windows PC audio file format.
.wma Windows Media Audio
Microsoft Windows compressed audio file format. A new compressed file format that is more efficient than MP3 and provides the distributor with control over copying of the file. Used with most Internet music services other than Apple iTunes.
Town.mid
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Digital Music Media
CDs, CD-Rs, CD-RWs, Mini-disksFlash MemoryHard Drive
Creative's Sound Blaster Wireless Music (listed at $250) is the first digital media receiver to offer music-file
navigation via a remote control with a large LCD. The idea is that once you've configured the small, modem-size base
unit to work with your Wi-Fi network, you'll be able to stream music over the system to any stereo or even a set
of powered speakers.
http://reviews.cnet.com/4521-6531_7-5021436-2.html?tag=dir.top
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Players and Software
Media player software such as iTunes, Windows Media Player, and RealPlayer, allows users to organize and play digital music, audio, and video files on PCs and media devices.
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Digital Music Distribution Channels
Purchase new on CDInternet music services
Per-songMonthly Subsciption
Satellite RadioIllegal methods
File sharing networksCopying CDs $9.99 pm
$12.95 pm
$14.95 pmor 99 cents
99 cents
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Digital Music Services
Click to Compare
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6.2
Digital Graphics
• Digital graphics• Pixels• Bit-mapped graphics• Vector graphics
• Scientific visualization• CAD• 3D Modeling Software
Key Terms
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Digital Graphics
Digital graphics refers to computer-based media applications that support creating, editing, and viewing 2D and 3D images and animation.
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Digitizing Graphics
Digital images are made up of a grid of small points called pixels (short for picture element).
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Digitizing Graphics
Colors for pixels are expressed using numbers that represent combinations of intensities of red, blue, and green, with one byte (256 levels of intensity) for each. Using three bytes provides 16,777,216 (224) possible colors.
How many bits does your PC use for color? Check your display properties. Demo tool: http://lit.cs.fsu.edu/colormap.exe
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Vector graphics files store geometric descriptions that define all the shapes in the image.
Graphics File Formats
Bit-mapped graphics files store the color of each pixel in the image.
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Uses of Digital Graphics
Creative Expression Presenting Information Communicating Ideas Exploring New Ideas
Scientific visualization uses computer graphics to provide visual representations that improve our understanding of some phenomenon.
Electrons in a nanotube
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Uses of Digital Graphics
Entertainment Documenting Life Designing Real-World
Objects Computer-assisted
design (CAD) software assists designers, engineers, and architects in designing three-dimensional objects.
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Vector Graphics Software
Vector Graphics Software, or drawing software, provides tools to create, arrange, and layer graphical objects on the screen to create pictures.
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3D Modeling Software 3D Modeling Software provides graphics
tools that allow artists to create pictures of realistic 3D models.Objects are created using a wire framework.Surface textures are applied to the objects.Light source is defined.The scene is rendered – lighting, shapes,
and surfaces are calculated to create a 3D appearance on a 2D display.
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3-D Modeling Software
3D Modeling is sometimes referred to as Ray Tracing. http://www.irtc.org/
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Real or computer generated?http://www.strata.com/showcase.asp
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http://www.this-wonderful-life.com/index.htm
Real or computer generated?
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Computer Animation
2D AnimationAnimated GIFsMacromedia Flash
3D AnimationInvolves rendering 24 3D images per second.Expensive SoftwareAvars are used to provide hinges for movements
of characters. http://www.pixar.com/howwedoit/index.html
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Defines avar for blinking eyelid.
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Digital Animation Software
Softimage/XSI v3.0 $13,000 http://www.softimage.com/products/face_robot/video_gallery
3ds + Reactor = $1,795 http://www4.discreet.com/showandtell/showandtell.php?id=465#
Lightwave 3D, $1,595 http://www.newtek.com/products/lightwave/lw-gallery/videos/index.html
Renderman $ 5,500 https://renderman.pixar.com/
Check links for cool demos.
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6.3
Digital Photography and Video
• Photo-editing Software• Video-editing Software
Key Terms
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Digital Photography
Digital photos are created, or acquired, using a digital camera or scanner and are saved as bit-mapped images.
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Photo Editing
Photo-editing software, such as Adobe Photoshop Elements and Microsoft Picture It!, includes special tools and effects that you can use to improve or manipulate bit-mapped photograph images.
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http://www.worth1000.com
Today’s technology makes it easy to create realistic looking faked photos – thus photos are no longer trusted as evidence in court.
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Valuable Viewing, Sharing, and Printing Services
http://photos.yahoo.comhttp://picasa.google.comwww.kodakgallery.comhttp://mobile.yahoo.com/photoshttp://target.photos.yahoo.com
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Digital Video
Digital video cameras, called digital camcorders, are available in a wide range of prices with wide-ranging capabilities.
Camcorder Buying Guide
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Video Editing
Video-editing software allows professional and amateur videographers to edit bad footage out and rearrange the good footage to produce a professional-style video production.
Video editing storyline
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Portable Digital Video Hardware
Portable Media Player (PMP)
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6.4
Interactive Media
• Interactive media• Video game consoles• Interactive TV
Key Terms
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Interactive Media
Interactive media refers to digital media presentations that involve user interaction for education, training, or entertainment.
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Interactive Media in Education
Authorware provides a toolkit for creating interactive 2-D tutorials and training for delivery on computer.
Software from companies like Mind Avenue provide tools for creating 3-D tutorials and training.
http://www.mindavenue.com
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Interactive Media in E-commerce
http://www.toyota.com/prius
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Game Consoles
Video game consoles, such as the Nintendo GameCube, the Sony Playstation 2 (PS2), and Microsoft’s Xbox, are high-powered multiprocessor computers designed to support 3D interactive multimedia.
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Portable Gaming Hardware
PlayStation PortableNintendo DS
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Interactive TV
Interactive TV is a digital television service that includes one or more of the following:Video on demandPersonal video recorderT-CommerceInternet access on TVVideo games over TV
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The Media Center PC
Windows XP Media Center Edition runs on media PCs to provide the following services:Television Receiver Electronic program guideWeb browserPersonal video recorderDVD PlayerDigital Music PlayerDigital Personal Photo and Video Library
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Chapter 6 Questions?
Don’t forget to turn your phone on!!