Chapter 1 Imm
-
Upload
r93alhajri -
Category
Documents
-
view
230 -
download
0
Transcript of Chapter 1 Imm
-
7/31/2019 Chapter 1 Imm
1/37
Chapter 1
Introduction To Multimedia
Muddassar Ali
International University of Technology Twintech (IUTT) Yemen
-
7/31/2019 Chapter 1 Imm
2/37
Muddassar Ali 2
Contents What is Multimedia?
History of MM
Media Types
Elements of MM
MM Applications
Multimedia Systems
Characteristics of a Multimedia System
Challenges for Multimedia Systems
Components of a Multimedia System
Desirable Features for a Multimedia System
Trends in MM
-
7/31/2019 Chapter 1 Imm
3/37
Muddassar Ali 3
What is Multimedia??The word multimedia is composed of twoparts: the prefix multi and media
Multi = Plural, more than one, many
Media = Medium of Communication
-
7/31/2019 Chapter 1 Imm
4/37
Muddassar Ali 4
What is Multimedia??
Still Images
AudioVideo
Animation
Text
Multimedia is a combination of Content forms:
http://en.wikipedia.org/wiki/Image:Crystal_128_camera.pnghttp://upload.wikimedia.org/wikipedia/commons/9/91/Crystal_Clear_app_aktion.pnghttp://en.wikipedia.org/wiki/Image:Crystal_Clear_app_camera.pnghttp://en.wikipedia.org/wiki/Image:Crystal_128_camera.pnghttp://en.wikipedia.org/wiki/Image:Crystal_Clear_app_kaboodle.pnghttp://en.wikipedia.org/wiki/Image:Crystal_Clear_action_playlist.png -
7/31/2019 Chapter 1 Imm
5/37
Muddassar Ali 5
What is Multimedia??Definition:
Multimedia is the field concerned with the
computer-controlled integration of text,
graphics, drawings, still and moving images
(Video), animation, audio, and any other
media where every type of information can berepresented, stored, transmitted and processed
digitally.
-
7/31/2019 Chapter 1 Imm
6/37
Muddassar Ali 6
ExamplesPresentations involving audio and videoclips are considered as Multimedia
presentation.
Education Softwares that involves
animations, sound and text are calledMultimedia softwares.
-
7/31/2019 Chapter 1 Imm
7/37
Muddassar Ali 7
History of Multimedia Newspaper: perhaps thefirstmass communication medium,
uses text, graphics, and images.
Motion pictures: In 1830s in order to observe motion too
rapid for perception by the human eye.
Wireless radio transmission: Guglielmo Marconi, at Italy, in
1895.
Television: the new medium for the 20th century, established
video as a commonly available medium and has changed the
world of mass communications.
-
7/31/2019 Chapter 1 Imm
8/37
Muddassar Ali 8
History of Multimedia 1829: Typewriter Introduced
1899: Magnetic Recording Introduced
1926: First Television 1931: First Stereo Recordings
1941: First TV Commercial
1948: Cable TV
-
7/31/2019 Chapter 1 Imm
9/37
Muddassar Ali 9
History of Multimedia 1959: First copy machine (by Xerox)
1961: Spacewars (1st video game)
1963: Mouse invented 1964: Compact cassette tape
1975: Bill Gates starts MICROSOFT
1977: Visual Effects category added to Oscar
awards
-
7/31/2019 Chapter 1 Imm
10/37
Muddassar Ali 10
History of Multimedia 1978: Video Laser Disk
1979: National Computer Graphics Associationorganized
1980: Disney uses computer graphics for themovie TRON
1980: Sony Walkman
1982: Adobe
1983: 1st CD Player
1984: 1st computer generated 30 secondcommercial used for Super Bowl
-
7/31/2019 Chapter 1 Imm
11/37
Muddassar Ali 11
History of Multimedia 1986: The Great Mouse Detective (1st animated
film to be aided by computer graphics)
1988: Disney & Pixar develop CAPS (ComputerAnimation Paint System)
1989: 8MM Videotape introduced by Sony
1989Tim Berners-Lee proposed the WorldWide Web
-
7/31/2019 Chapter 1 Imm
12/37
Muddassar Ali 12
History of Multimedia 1991MPEG-1 was approved as an international standard for
digital
1992JPEG was accepted as the international standard fordigital image
1992The first MBone audio multicast on the Net was made.
1993The University of Illinois National Center for
Supercomputing Applications produced NCSA Mosaicthefirst full-fledged browser.
-
7/31/2019 Chapter 1 Imm
13/37
Muddassar Ali 13
History of Multimedia 1994Jim Clark and Marc Andreessen created the Netscape
program.
1996DVD video was introduced; high quality full-lengthmovies were distributed on a single disk.
1998Hand-held MP3 devices first made inroads into
consumerist tastes in the fall of 1998, with the introduction of
devices holding 32MB of flash memory. 2000WWW size was estimated at over 1 billion pages.
-
7/31/2019 Chapter 1 Imm
14/37
Muddassar Ali 14
Classification of Media Types
-
7/31/2019 Chapter 1 Imm
15/37
Muddassar Ali 15
Captured Versus Synthesised Media
-
7/31/2019 Chapter 1 Imm
16/37
Muddassar Ali 16
Discrete Versus Continuous Media
-
7/31/2019 Chapter 1 Imm
17/37
-
7/31/2019 Chapter 1 Imm
18/37
Elements of MultimediaElements of Multimedia are:
1. Text
2. Graphics3. Sound
4. Video
5. Animation
Muddassar Ali 18
-
7/31/2019 Chapter 1 Imm
19/37
Elements of MultimediaText: characters representing words and
symbols. The use of different styles, fonts and
colors can be used to emphasize specificpoints.
Graphics: visual representation of an object.Examples include conventional artwork,computer-generated artwork, photographs orcaptured video frames.
Muddassar Ali 19
-
7/31/2019 Chapter 1 Imm
20/37
Elements of MultimediaSound: vibration as perceived by hearing. This
may include speech, audio effects (e.g.
applause), ambient sound (e.g. the backgroundsound of the sea etc.) and music.
Video: presentation of moving picturesrepresenting actual events.
Muddassar Ali 20
-
7/31/2019 Chapter 1 Imm
21/37
Muddassar Ali 21
Elements of Multimedia
Animation: moving sequence of still images.It consists of a series of still images shown in
rapid succession. It is an illusion of motion. Ittricks our mind into thinking that stationaryartwork is truly moving.
-
7/31/2019 Chapter 1 Imm
22/37
Muddassar Ali 22
Multimedia Applications
AMultimedia Application is an Application
which uses a collection of multiple media
sources e.g. text, graphics, images,
sound/audio, animation and/or video.
-
7/31/2019 Chapter 1 Imm
23/37
Multimedia Applications
Examples of Multimedia Applications include:
World Wide Web
Hypermedia Video conferencing
Interactive TV
Games Virtual reality
Digital video editing and production systems
Multimedia Database systemsMuddassar Ali 23
-
7/31/2019 Chapter 1 Imm
24/37
Muddassar Ali 24
Hypertext?? Hypertextis a text which
contains links to other
texts. The term wasinvented by Ted Nelson
around 1965.
Hypertext is thereforeusually non-linear (as
indicated in fig).
-
7/31/2019 Chapter 1 Imm
25/37
Muddassar Ali 25
HyperMedia? HyperMedia is not constrained to
be text-based. It can include
other media, e.g., graphics,
images, and especially thecontinuous media - sound and
video. Apparently, Ted Nelson
was also the first to use this term.
The World Wide Web (WWW) is the
best example of hypermedia
applications.
-
7/31/2019 Chapter 1 Imm
26/37
Muddassar Ali 26
Multimedia Systems
AMultimedia System is a system capable of
processing multimedia data and applications.
AMultimedia System is characterized by
processing, storage, generation and
manipulation of Multimedia information.
-
7/31/2019 Chapter 1 Imm
27/37
Muddassar Ali 27
Characteristics of a Multimedia SystemA Multimedia System has 4 Basic characteristics:
-
7/31/2019 Chapter 1 Imm
28/37
Muddassar Ali 28
Challenges for Multimedia Systems The key issues multimedia systems need to
deal with are:
How to represent and store temporal information.
How to strictly maintain the temporal relationships
on play back/retrieval
-
7/31/2019 Chapter 1 Imm
29/37
Muddassar Ali 29
Challenges for Multimedia Systems Data has to be represented digitally so many initial source of
data needs to be digitise -- translated from analog source to
digital representation.
The data is large several Mb easily for audio and video --
therefore storage, transfer (bandwidth) and processing
overheads are high.
-
7/31/2019 Chapter 1 Imm
30/37
Muddassar Ali 30
Components of a Multimedia SystemComponents (Hardware and Software) required for a multimedia
system:
Capture devices -- Video Camera, Video Recorder, Audio
Microphone, Keyboards, mice, graphics tablets, 3D inputdevices, tactile sensors, VR devices. Digitising/Sampling
Hardware
Storage Devices -- Hard disks, CD-ROMs, Jaz/Zip drives,
DVD, etc Communication Networks -- Ethernet, Token Ring, FDDI,
ATM, Intranets, Internets.
-
7/31/2019 Chapter 1 Imm
31/37
Muddassar Ali 31
Components of a Multimedia SystemComputer Systems -- Multimedia Desktopmachines, Workstations, MPEG/VIDEO/DSP
HardwareDisplay Devices -- CD-quality speakers,HDTV,SVGA, Hi-Res monitors, Colour printers etc.
-
7/31/2019 Chapter 1 Imm
32/37
Muddassar Ali 32
Desirable Features for a Multimedia System Very High Processing Power -- needed to deal with large
data processing and real time delivery of media. Special
hardware commonplace.
Multimedia Capable File System -- needed to deliver real-
time media -- e.g. Video/Audio Streaming. Special
Hardware/Software needed e.g RAID technology.
Data Representations/File Formats that support
multimedia -- Data representations/file formats should be
easy to handle yet allow for compression/decompression in
real-time.
-
7/31/2019 Chapter 1 Imm
33/37
Muddassar Ali 33
Desirable Features for a Multimedia System
Efficient and High I/O -- input and output to the file
subsystem needs to be efficient and fast. Needs to allow for
real-time recording as well as playback of data. e.g. Direct to
Disk recording systems.
Special Operating System -- to allow access to file system
and process data efficiently and quickly. Needs to support
direct transfers to disk, real-time scheduling, fast interrupt
processing, I/O streaming etc.
-
7/31/2019 Chapter 1 Imm
34/37
Muddassar Ali 34
Desirable Features for a Multimedia System
Storage and Memory -- large storage units (of the order of 50
-100 Gb or more) and large memory (50 -100 Mb or more).
Large Caches also required and frequently of Level 2 and 3
hierarchy for efficient management.
Network Support -- Client-server systems common as
distributed systems common.
Software Tools-- user friendly tools needed to handle media,design and develop applications, deliver media.
-
7/31/2019 Chapter 1 Imm
35/37
-
7/31/2019 Chapter 1 Imm
36/37
Muddassar Ali 36
Trends in MultimediaCurrent big applications areas in Multimedia include:
World Wide Web -- Hypermedia systems -- embrace nearly
all multimedia technologies and application areas. Ever
increasing popularity.
MBone -- Multicast Backbone: Equivalent of conventional
TV and Radio on the Internet.
Enabling Technologies -- developing at a rapid rate to
support ever increasing need for Multimedia. Carrier,Switching, Protocol, Application, Coding/Compression,
Database, Processing, and System Integration Technologies at
the forefront of this
-
7/31/2019 Chapter 1 Imm
37/37
Muddassar Ali
END OF CHAPTER
Any Questions???