Succeeding with Technology Digital Media for Work and Leisure Digital Music and Audio Digital Graphics Digital Photography and Video Interactive Media

Succeeding with Technology

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

song I Turn My Camera On from the album Gimme Fiction by Spoon.


Digital Media

Digital Media encompasses digital technologies of all kinds that serve and support digital music, video, and graphics.


6.1

Digital Music and Audio

• Digital audio• Digital music• Synthesizer• Sampler• Sequencer

• MIDI• Podcast• Media player software• Satellite Radio

Key Terms


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.


Digitizing Sound Example

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.


Digitizing SoundDefinitions you need to know

Analog to Digital Conversion (ADC)A process where sound waves are

represented with numbers or digitally converted

Also known as Sampling

Digital to Analog Conversion (DAC)A process where digitized sound is

transformed back into its analog form


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


Digital Sound For Professionals

Forensic audio uses digital processing to de-noise, enhance, edit, and detect sounds to assist in criminal investigations.

Abby’s lab-NCI

S


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.


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/


MIDI

The musical instrument digital interface (MIDI) protocol provides a standard language for digital music devices to use in communicating with each other.


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/ Course Port – Podcast Flash Cards


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


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


Players and Software

Media player software such as iTunes, Windows Media Player, and RealPlayer, and soon the latest ZUNE allows users to organize and play digital music, audio, and video files on PCs and media devices. Microsoft rolls out three new Zunes


Digital Music Distribution Channels

Purchase new on CDInternet music services

Per-songMonthly Subscription

Satellite RadioIllegal methods

File sharing networksCopying CDs $9.99 pm

$12.95 pm

$14.95 pmor 99 cents

99 cents

Record companies win music sharing trial

New ZUNE


Digital Music Services

Click to Compare


6.2

Digital Graphics

• Digital graphics• Pixels• Bit-mapped graphics• Vector graphics

• Scientific visualization• CAD• 3D Modeling Software

Key Terms


Digital Graphics

Digital graphics refers to computer-based media applications that support creating, editing, and viewing 2D and 3D images and animation.


Digitizing Graphics

Digital images are made up of a grid of small points called pixels (short for picture element).


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.

Click for Resize Example


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


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.


Vector Graphics Software

Vector Graphics Software, or drawing software, provides tools to create, arrange, and layer graphical objects on the screen to create pictures.


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.


3-D Modeling Software

3D Modeling is sometimes referred to as Ray Tracing. http://www.irtc.org/


Real or computer generated?http://www.strata.com/showcase.asp


http://www.this-wonderful-life.com/index.htm

Real or computer generated?


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

COMING SOON: The Nightmare Before Christmas Digital 3D

Another Example: Total Immersion D’Fusio

n


Defines avar for blinking eyelid.


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.


6.3

Digital Photography and Video

• Photo-editing Software• Video-editing Software

Key Terms

I’m Stopping Here, But read carefully on your own. You’ll see at least four questions

from the next two sections on your exam.


Digital Photography

Digital photos are created, or acquired, using a digital camera or scanner and are saved as bit-mapped images.


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.


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.


Valuable Viewing, Sharing, and Printing Services

http://photos.yahoo.comhttp://picasa.google.comwww.kodakgallery.comhttp://mobile.yahoo.com/photoshttp://target.photos.yahoo.com


Digital Video

Digital video cameras, called digital camcorders, are available in a wide range of prices with wide-ranging capabilities.

Camcorder Buying Guide


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


Portable Digital Video Hardware

Portable Media Player (PMP)


6.4

Interactive Media

• Interactive media• Video game consoles• Interactive TV

Key Terms


Interactive Media

Interactive media refers to digital media presentations that involve user interaction for education, training, or entertainment.

Example: Digital Media for Work and Leisure, Army’s Virtual World


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


Interactive Media in E-commerce

http://www.toyota.com/prius


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.


Portable Gaming Hardware

PlayStation PortableNintendo DS


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


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


Chapter 6 Questions?

Don’t forget to turn your phone on!!

Documents

Succeeding with Technology Digital Media for Work and Leisure Digital Music and Audio Digital Graphics Digital Photography and Video Interactive Media