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Multimedia System

Text No. 1 Chapter 4



What is Multimedia?• Multimedia is a medium that includes the following four

factors:

– Digitisation

• Of audio, images and other information besides characters andnumeric values, high-quality and easy-to-process information can be

integrated and used. – Networking

• Through the interconnection of computers using communication linessuch as optical fiber, large amounts of information can be exchangedaccurately at high speed.

– Interactivity

• As with the telephone, bi-directional interactive processing with ahigh response level can be performed.

– Inclusion of human interfaces

• Diverse types of information can be naturally and easily handled.



Multimedia



Multimedia

• Multimedia technology is not a single

technology, but rather a collection of

technologies for manipulating – Text (characters, digits, symbols)

– Graphics (including images and animation)

– Audio – Video



TEXT

• Characters that are used to create words,

sentences, and paragraphs, is a fundamental

element used in many multimediaapplications.

• Different text sizes, fonts, colour or styles

may be used to emphasis the text.



GRAPHICS

• A graphic, or graphic

image or still graphical

image, such as drawing,chart, or photograph.



ANIMATION

• Displays a series of still graphics in

sequence to give the look of movement.



AUDIO

• Music, Speech, or any other sound.



VIDEO• Photographic images played at speeds of 15 to 30 frames

per second (RM, MPEG, AVI, ASF, DVIX formats)



LINKS

• Interactive Multimedia is a multimediaapplication that accepts input from the user bymeans of the keyboard or pointing device such asa mouse, and performs some action in response

– interactive links

Amazon.com

Microsoft

USQ

http://www.amazon.com/

http://www.microsoft.com/

http://www.usq.edu.au/ancil/fob/75001

http://www.usq.edu.au/ancil/fob/75001

http://www.microsoft.com/

http://www.amazon.com/



Multimedia Services

• The services provided to the users of multimedia systems

• Application examples of multimedia service

– Business field

– Medical care field

– Publication field

– Education field

– Game field

– Interface technology

– Software production technology



Multimedia Education



Multimedia Entertainment



Multimedia Platform

• Hardware – Display device

– Image scanner

– Video equipment – Audio equipment

– Digital sound equipment

– Pointing device

– Storage medium – Modem



Multimedia Platform

• Operating System

– GUI adoption

– Multi-task implementation

– Provision of network functions

– Provision of multimedia functions



Multimedia Platform• Creation of multimedia titles

– Editing software

– Image

• Still image

• Animated image

– Audio

– Graphics

– Authoring tools

• Graphics drawing and editing

• Graphics painting and editing

• Image tools

• Audio/video tools

– HyperText

• Browser UI technology is based on HyperText standards

http://d/stub2-1.exe

http://d/stub2-1.exe



Multimedia Technology

• Artificial Intelligence (AI)

• Pattern recognition (OCR)

• Artificial Reality/Virtual Reality/ Computer

Graphics (AR/VR/CG)

• Agent (knowledge base)



Agents/Bots



Multimedia Applications



Pattern recognition• Voice pattern recognition

– Phoneme recognition processing – voice recognition, user-voiceanalysis

– Word recognition processing – online dictionary look-ups

– Language processing – ‘meanings’ attached to tone, diction, volume

– AI technology to exclude ‘dog words’

• Image pattern recognition (OCR) – Image input processing

– Image recognition preparation processing• Noise elimination, data emphasis, colour adjustment

– Characteristics extraction processing• Text versus graphics

• Language

– Partial recognition processing• Candidate extraction

– Total recognition processing• Candidate confirmation



Synthesis of voice and image

• Technology to create (synthesize) voices and images

• Voice synthesis technology – Editing method (edits recorded voices and creates specified

documents or conversations – disharmony sometimes apparent)

– Analysis method (analyse, encode and store as information, thenstored – household appliances, elevators)

– Rule-based method (analyse and establish rules of patterns – change base tones)

• Image synthesis method

1. Creation of the original picture (geometric representation, wireframe model, surface model)

2. Shape change (correction in 3-dimensions)

3. Image display (display in 3-dimensions, light source, shading,filtering and other adjustments)



Multimedia Application System

• Internet broadcasting

• Nonlinear image edit system

– Video tape editing – linear editing – Softcopy editing – non-linear, data compression,

previews

• Video-on-demand

– Full control of viewing on-the-fly (personalisedviewing), not just channel switching

• Other application systems



Benefits of Multimedia

• Easy to understand and easy to use

• Integrated and interactive

• Conducive to cooperative work

environment

• Flexible

• Supportive of large audience



IT Education and Multimedia



Congratulations!

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