Transcript Multimedia Definition and Aspects

Multimedia
Definition and Aspects
1
T.Sharon-A.Frank
What is Multimedia?
2
T.Sharon-A.Frank
Modern Multimedia (1)
3
• The same story, information, etc, can be
represented in different media:
– text, images, sound, animation, video …
• All media can be represented digitally as a
structured collection of bits:
– manipulated by programs, stored, transmitted
over networks …
• Digital media can be combined and integrated
into multimedia. T.Sharon-A.Frank
Modern Multimedia (2)
• Combination of media is actually
commonplace (e.g., TV news) and natural –
we perceive the world through all our senses
at once.
• Novelty of digital multimedia is that all media
can be treated as data.
• Programs can manipulate data in response to
user input, so digital multimedia can be
interactive.
4
T.Sharon-A.Frank
Characteristics of Modern Multimedia
Four necessary characteristics:
1. Digital Media
2. Multiple Media
3. Integrated Media
4. Interactive with Human Control
5
T.Sharon-A.Frank
Multiple Media Conversion
maps
audio
pictures
ABC
text
video
graphics
6
T.Sharon-A.Frank
Device Proliferation
7
T.Sharon-A.Frank
Multimedia Workstation
Communication
CD-ROM
Frame
Grabber
Voice
Recognition
Unit
Video
Speech
Synthesis
Unit
8
Graphics
T.Sharon-A.Frank
Audio
Fax
x
Multimedia Overall Configuration
AUTHORING
Videodisc player
Removable media
PLAYBACK
CD-ROM
Scanner
Speakers
Video display card
Touch screen
Sound digitizer
Videodisc player
Desktop Multimedia Publishing
Camcorder, camera
or videodisc player
Video or TV Monitor
Videotape recorder
Audio mixer
CD-ROM
Speakers
10
High quality
video card
T.Sharon-A.Frank
Sound digitizer
Multimedia Application Types
• Local MM
– Stand-alone
• Networked and Distributed MM
– Network based
– Group communication oriented
– Need QoS (Quality of Service)
11
T.Sharon-A.Frank
Online/Offline MM Delivery
• Online Delivery:
– Uses a network (usually the Internet) to send
information from one computer to another.
– Web is commonest form of online delivery of
multimedia.
• Offline Delivery:
– Removable storage medium is used to carry the
data: CD-ROM, DVD.
12
T.Sharon-A.Frank
Linearity vs. Non-Linearity
Linear Text
13
T.Sharon-A.Frank
Hypertext/Hypermedia
Linearity
• Film: fixed order of
frames defines a
single playback
sequence.
• Book: physical
arrangement of text
and pages implies a
linear reading
order.
14
T.Sharon-A.Frank
Non-Linearity
• Hypermedia: links between pages permit
multiple arbitrary reading orders.
• Flash: jumps between frames, controlled
by interactivity, permits branching and
loops.
15
T.Sharon-A.Frank
Hypertext
Hypertext is non linear
text. It reflects the way
we think and write
---- definitions -------------------------------------------models--------Link
Thinking Models
16
Writing Models
T.Sharon-A.Frank
Node
Hypertext on the WWW – HTML
17
T.Sharon-A.Frank
Hypermedia Example
18
T.Sharon-A.Frank
Hypermedia
Multimedia
19
Hypermedi
a
T.Sharon-A.Frank
Hypertext
So what was the message?!
20
T.Sharon-A.Frank
Communication History
Wheel
3200-3500
B.C
Paper
105 AD
Telephone
1876
Automobile
~1900
Powered Flight
1903
Computer
1945
Printing Press
1450s
Radio
1901
Fax
1843
Television
1927
The Internet
1973
http://www.cbc4kids.ca/general/the-lab/history-of-invention/default.html
21
T.Sharon-A.Frank
Boundaries Between:
Computing, Communications and Entertainment
Communication
Devices
Consumer
Entertainment
Devices
Public Switched
LANs & WANs
Network
CATV &
Broadcast TV
Computing
Devices
22
T.Sharon-A.Frank
Multimedia Technology
Fueling Convergence of Domains
Tele-computers
Video Phones
Computer-based
Text-display
Video conferencing
phone
Portable
Telephones
Computers
Cellular phones
23
Interactive TV
Computing
Devices
Communication
Devices
LANs & WANs
Public Switched
Network
Televisions
VCRs
Consumer
Entertainment
Devices
CATV &
Broadcast TV
802.3, 802.5, x.25
POTS, ISDN
Analog Coax
FDDI, ATM, 802.6
B-ISDN
FTTC/FTTH
T.Sharon-A.Frank
Multimedia in Communication Terms
Media
Order
Media B/W
Low
(10 B/S)
Medium
(10 KB/S)
High
(10 MB/S)
GB/S???
Linear
Passive
BATCHY
Text, Documents
Plain Book
Graphs
Lecture, Slides
Voice
Maps
Graphics
Color Display
Photographs
Recorded Audio
Sound
Television
Films (2D, 3D)
Video
Audio +
Moving Visuals
Batch Multimedia
Non-Linear
Interaction
REAL-TIME
Advanced Book + Index, Cross
References, Photos, Appendices
Visual Glossary
Slide Show + Narration
Computerized Chess Games
Slide Show + music
Audiovisual Show
Pinball Machine
Personal Computer
Desktop Publishing (DTP)
Hypertext
TV Zapping
Desktop Video (DTV)
Video Game
Multimedia / Hypermedia
High Definition TV (HDTV)
Teleconferencing
Virtual Reality
So what’s behind the picture?!
25
T.Sharon-A.Frank