Multimedia System And All Topics For Presentation

Multimedia Systems

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Introduction to Multimedia

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Objectives of Course
•Be aware of factors involved in multimedia
systems performance, integration and
evaluation
•They will be required to understand the
principles of multimedia creation and
processing and the main features of
multimedia systems

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Course Detail
•Course Name –Multimedia Technology,
Credit Hour –03
•How this course will proceed
•Stream 1: Lectures will be delivered Assignments,
Quizzes, Exams
•Book: Digital Multimedia
•By: Nigel Chapman and JennyChapman
•Stream 2: Practical Assignments will be given
Tools will be introduced and Tutorials may be scheduled
(on demand)
•Tools: Adobe Products, Corel Products, video editing
tools

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Introduction to Multimedia
Lets start with a story…
It was a dark and stormy night
•Novel
•Radio Play
•Theatre
•Film
•Computer

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Digital Multimedia
•The same story, information, etc can be
represented in different media
–Text, images, sound, moving pictures
•All media can be represented digitallyas a
structured collection of bits
–Manipulated by programs, stored, transmitted over
networks
•Digital media can be combined into
multimedia

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What is Multimedia?
•Multimedia can have a many definitions
these include:
•Multimedia means that computer information
can be represented through audio, video, and
animation in addition to traditional media (i.e.,
text, graphics drawings, images).

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What is Multimedia?
•An interactive computer-mediated
presentation that includes at least two
of the following elements:
–Text
–Sound
–Still graphic images
–Motion graphics
–Animation

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Multimedia: a working definition
–A combination of two or more categories of
information having different transport signal
characteristics
–Typically, one medium is a continuous medium
while another is discrete
–Image, audio, video and graphics are examples
of media

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Multimedia Application Definition
•A Multimedia Application is an
Application which uses a collection of
multiple media sources e.g. text,
graphics, images, sound/audio, animation
and/or video.

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Applications
•Examples of Multimedia Applications
include:
World Wide Web
Video conferencing
Video-on-demand
Interactive TV
Home shopping
Games
Digital video editing and production systems
Multimedia Database systems

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Applications of Multimedia
Interactivity
That goes beyond the simple control offered by VCR
Where you can change the story by altering the events that occur
Where you can choose to have transcription if there is hearing impairment
User input may control a multimedia production, but only within limits set by
the multimedia producer
Forensic Multimedia
Where jury members can examine the events from different angle
Entertainment
Games | Starship, T-2, Doom and its bloody off springs, Prince of Persia
Movies | …
Education
Cinemania Encyclopedia Britannica
Cinemania, Encyclopedia, –CBTs : Computer Based Trainings
Simulations

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Visualization
•How to represent a particular data, information etc..
Pie Charts / Bar Charts generated from a spreadsheet
Three Dimensional Data Representations
Time Varying Presentations for complex dynamic systems
Atmospheric dynamic to represent a tropical storm
•Creativity
Target Audience
Keen Observations
Lots of exposure to similar area
In depth Analysis
Re Creation in a better way
Open to Criticism

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Scientific Analysis, Research and
Presentations

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Linearity
Film: fixed order
of frames defines
a single playback
sequence
Book: physical
arrangement of
text and pages
implies a linear
reading order

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Non-Linearity
•Flash: jumps between
frames, controlled by
interactivity, permit
branching and loops
•Hypermedia: links
between pages permit
multiple arbitrary
reading orders

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What is Hypertext and Hypermedia?
•Hypertext is a text which contains links
to other texts.
•Hypermedia is not constrained to be
text-based. It can include other media,
e.g., graphics, images, and especially the
continuous media –sound and video.

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Hypermedia

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Example Hypermedia Applications
•The World Wide Web (WWW) is the
best example of hypermedia
applications.
•PowerPoint
•Adobe Acrobat

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Delivery of Multimedia
Online Delivery
Uses a network to send information from computer, often server
machine providing centralized storage of bulky data, to another,
usually a personal computer on somebody’s desk.
The network can be LAN, Internet (World Wide Web)
Offline Delivery
Uses some removable storage medium
CD ROMs / DVDs

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Multimedia Production
Making of Multimedia requires software not only for preparation of individual
media elements, but for their integration into finished production.
Authoring Systems
•Programs that allow a designer to assemble different media elements
in space and time, and add interactive behavior to them.
Story Boards
•Mean of making and communicating multimedia designs.
•Used in large animation studios, and by music videos and
advertisement producers, to plan the construction of a piece of work,
and to communicate its structure among the team producing it.
•A sequence of still picture showing the composition of shots at key
points in production.
•So it plans the work, which can be used to organize its subsequent
development.
•Linear in behavior like a comic strip.

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Initial Story Board

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After Multimedia Production

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User Interface
•Means by which choices can be presented to users can vary
enormously.
•Menus, Dialog Boxes, Outlined Buttons and so on…

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Multimedia Systems
•A Multimedia System is a system capable of
processing multimedia data and applications.
•A Multimedia System is characterized by the
processing, storage, generation, manipulation
and performance of Multimedia information.

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Characteristics of a Multimedia
System
•A Multimedia system has four basic characteristics:
•Multimedia systems must be computer controlled.
•Multimedia systems are integrated.
•The information they handle must be represented
digitally.
•The interface to the final presentation of media is
usually interactive.

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Challenges for Multimedia Systems
•Distributed Networks
•Temporal relationship between data
–Sequencing within the media
•playing frames in correct order/time
frame in video.
Synchronization—inter-media scheduling
E.g.Video and Audio —Lip synchronization is
clearly important for humans to watch playback
of video and audio and even animation and
audio.

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Desirable Features for a Multimedia
System
•Given the above challenges the following feature a desirable
for a Multimedia System:
•Very High Processing Power —needed to
deal with large data processing and real time
delivery of media.

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•Multimedia Capable File System —needed to
deliver real-time media —e.g. Video/Audio
Streaming.
•Special Hardware/Software needed –e.g
RAID (Redundant Array of Independent Disks)
technology.
•Data Representations —File Formats that
support multimedia should be easy to handle yet
allow for compression/decompression in real-time.

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•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.

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Storage and Memory —large storage units
(of the order of 50 -100 Gb or more) and large
memory (50 -100 Mb or more).
Software Tools —user friendly tools needed
to handle media, design and develop
applications, deliver media.

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Components of a Multimedia System
•Now let us consider the Components required for a
multimedia system:
•Capture devices —Video Camera, Video
Recorder, Audio Microphone, Keyboards,
sensors etc.
•Storage Devices —Hard disks, CD-ROMs,
DVD,etc

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•Communication Networks —Ethernet, Token
Ring, FDDI(Fiber Distributed Data Interface),
ATM,Intranets, Internets.
•Display Devices —CD-quality speakers, Hi-Res
monitors, Colour printers etc.

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A Course-on-Demand System
Multimedia
Database
Network
On-line facilitator
user
Database server
Courseware
developer