Truyền thông đa phương tiện Multimedia Communications

3/22/2012

Multimedia Communications

Associate Prof. Nguyen Chan Hung, Ph.D.
Vice-Head | Department of Telecommunication System |
School of Electronics and Telecom.
Head of Research and Development Laboratory of
Multimedia Technology (RDLAB)
Hanoi University of Science and Technology (HUST)
Tel: +84-0904186221 | Fax: +84-4-38692241
E-mail: ,
URL: />
20/2/2012

Prof. Nguyen Chan Hung - HUST

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Course syllabus
Introduction to Multimedia & Multimedia
Communications
Video coding/compression techniques
Emerging multimedia communication
systems
Digital TV
IPTV
IP Multimedia Subsystem (IMS)
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Materials
The Internet
Lecture slides
RFC (www.ietf.org), Standards (ISO, ITU)
Research papers
Others

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Multimedia communication – A BIG
PICTURE
Objectives:
◦ To understand the concept of Multimedia and its
importance
◦ To be familiar with Multimedia products
◦ To be aware of the networking evolution.
◦ To understand the network types.
◦ To discuss multimedia requirements in the

communication systems.
◦ To understand the basics of a multimedia
communication system.
◦ To illustrate multimedia networks.
◦ To know the Internet protocol suite for multimedia
communications.
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Multimedia communication in
Vietnamese market
A potential emerging market…
Digital TV / Pay-TV booming
◦
◦
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VTC
DTH (VTV), K+, AVG
Viettel

DTV Technologies:

◦
◦
◦
◦
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DVB-T/T2
DVB-C/C2,
DVB-S/S2
DVB-H
DMB

IPTV:
◦

VNPT MyTV, VTC, local trials

Mobile Communications
◦
◦

3G: Viettel, Mobiphone,Vinaphone, etc…
Services: MobiTV, Traffic Camera, VideoPhone, etc..

Web Video: Clip.vn
Music network: Zing mp3, sannhac, etc
Education: FPT Arena

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What is Multimedia?
Derived from the word “Multi” and “Media”
◦ Multi
Many, Multiple,

◦ Media
Tools that is used to represent or do a certain things,
delivery medium, a form of mass communication –
newspaper, magazine / tv.
Distribution tool & information presentation – text,
graphic, voice, images, music and etc.

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Definition of Multimedia
Multimedia is a combination of text, graphic,
sound, animation, and video that is delivered

interactively to the user by electronic or
digitally manipulated means.
GRAPHIC
TEXT

VIDEO
AUDIO
ANIMATION
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Elements of Multimedia
GRAPHIC
TEXT

TEXT
VIDEO
AUDIO
ANIMATION

A broad term for something that contains words to express
something.
Text is the most basic element of multimedia.
A good choice of words could help convey the intended message
to the users (keywords).
Used in contents, menus, navigational buttons

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Elements of Multimedia
GRAPHIC
TEXT

TEXT
VIDEO
AUDIO
ANIMATION

Example

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Elements of Multimedia
GRAPHIC

TEXT

GRAPHIC
VIDEO
AUDIO
ANIMATION

Two-dimensional figure or illustration
Could be produced manually (by drawing, painting,
carving, etc.) or by computer graphics technology.
Used in multimedia to show more clearly what a
particular information is all about (diagrams, picture).

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Elements of Multimedia
GRAPHIC
TEXT

GRAPHIC
VIDEO

AUDIO
ANIMATION

Example

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Elements of Multimedia
GRAPHIC
TEXT

AUDIO
VIDEO
AUDIO
ANIMATION

Produced by vibration, as perceived by the
sense of hearing.
In multimedia, audio could come in the form of
speech, sound effects and also music score.

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Elements of Multimedia
GRAPHIC
TEXT

AUDIO
VIDEO
AUDIO
ANIMATION

Example

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Elements of Multimedia
GRAPHIC
TEXT

ANIMATION
VIDEO
AUDIO

ANIMATION

The illusion of motion created by the consecutive
display of images of static elements.
In multimedia, animation is used to further enhance /
enriched the experience of the user to further
understand the information conveyed to them.

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Elements of Multimedia
GRAPHIC
TEXT

ANIMATION
VIDEO
AUDIO
ANIMATION

Example

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Elements of Multimedia
GRAPHIC
TEXT

VIDEO
VIDEO
AUDIO
ANIMATION

Is the technology of capturing, recording, processing,
transmitting, and reconstructing moving pictures.
Video is more towards photo realistic image sequence /
live recording as in comparison to animation.
Video also takes a lot of storage space. So plan carefully
before you are going to use it.
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Interactive Multimedia
When the user is given the option of
controlling the elements.

Hyper Media
A combination of hypertext, graphics,
audio, video, (linked elements) and
interactivity culminating in a complete,
non-linear computer-based experience.
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Example
Interactive Multimedia

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Example
Hyper Media
Main Page
1.

Video link

2.

Image link

3.

Audio Link

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Linear VS NonNon-Linear
LINEAR
A Multimedia Project is identified as Linear when:
◦ It is not interactive
◦ User have no control over the content that is being showed to
them.
Example:
◦ A movie

◦ A non-interactive lecture / demo show

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Linear VS NonNon-Linear
NONNON-LINEAR
A Multimedia Project is identified as Non-Linear when:
◦ It is interactive
◦ Users have control over the content that is being showed to them.
◦ Users are given navigational control
Example:
◦ Games
◦ Courseware
◦ Interactive CD

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Authoring Tools
Use to merge multimedia elements (text, audio,
graphic, animation, video) into a project.
Designed to manage individual multimedia
elements and provide user interaction (if
required).

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Authoring Tools
Examples
◦

Macromedia
Authorware

◦

Macromedia
Director

◦

Macromedia Flash

◦

Microsoft Power
Point

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Importance of Multimedia
There are a number of fields where
multimedia could be of use. Examples are:◦
◦
◦
◦
◦

Business
Education
Entertainment
Home
Public Places

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Importance of Multimedia
Business
◦ Use and Applications
Sales / Marketing Presentation
Trade show production
Staff Training Application
Company Kiosk

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Importance of Multimedia
Education
◦ Use and Applications
Courseware / Simulations
E-Learning / Distance Learning
Information Searching

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Importance of Multimedia
Entertainment
◦ Use and Applications
Games (Leisure / Educational)
Movies
Video on Demand
Online

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Importance of Multimedia
Home
◦ Use and Applications
Television

Satellite TV
SMS services (chats, voting, reality TV)

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Importance of Multimedia
Public Places
◦ Use and Applications
Information Kiosk
Smart Cards, Security

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Multimedia Products
1.
2.
3.

4.
5.
6.

Briefing Products
Reference Products
Database Products
Education and Training Products
Kiosk
Entertainment and Games

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Multimedia Products
Briefing Products
•

Small, straightforward, linear products used to present
information quickly and concisely.

•

Characteristic of briefing product:
Short Development Cycle
Limited Number of Presentations
Usage of text to present information with limited use of
graphic, audio and video.
Have few navigational controls. (mouse click and button
press to move from one page to another)
Content and the format are suitable for the audience and
fulfill the purpose of the presentation.
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Multimedia Products
Briefing Products
•

Good briefing presentation depends on:
The understanding of the presented subject.
Seamless integration of content.
Consistent layout

•

Example:

Corporate Presentation
Sales Presentation
Educational Lectures

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Multimedia Products
Reference Products
•

Often used for answering specific questions or for general browsing of
information. (stored on CD/ DVD ROM)

•

Characteristic of reference product:
Used by wide range of user (small – adult)
Have navigational menu, book marking, searching, printing utility

•

2 Basic classes of reference product:
Generalized Content (dictionary/encyclopedia)
Broad treatment of content at a limited depth
Detailed Content
Focus on specific area and provide extensive information.
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Multimedia Products
Reference Products
•

Good usability and success depends on:
The developers understanding the body of information and
how the end user will want to access it.
Help function should always available to explain how to
access and use the information

•

Examples are electronic forms of:
Encyclopedia
Dictionaries

Cookbooks, Historical, Informative
Scientific surveys.
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Multimedia Products
Reference Products
•

Example:

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Multimedia Products

Database Products
•

Similar to reference product in a sense that large amount of information
are made available to the end user.

•

Focus on storing and accessing the actual data (multimedia data such
as text, graphic, audio, animation and video)

•

Characteristics of Database Products are:
Manages multimedia data (large data)
Descriptive finding methods
Content based search
Simultaneous access
Online database
Relational consistency in data management.
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Multimedia Products
Database Products
•

Examples are:
Google Search
Google Earth

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Multimedia Products
Education and Training Products
•

Similar to textbook or training manuals but have added media such as
audio, animation and video.

•

Make up a significant share of the multimedia market ranging from prekindergarten to postgraduate offerings from technical to corporate
training products.

•

2 categories of reference product:
Instructor Support Products
Standalone or Self-Paced Products
Combination Products

•

Shares the same characteristics as Reference Product

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Multimedia Products
Education and Training Products
•

Example

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Multimedia Products
Kiosk Products
•

A product which is usually stationed at public places and allow the user
to find information interactively and also other types of transaction.

•

Characteristics of Kiosk Products:Limited target users and usage.
User friendly and easily used by user.
Fast response.

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Multimedia Products
Kiosk Products
•

Categories of Kiosk
Point Of Information
Provide certain information (example map, timetable etc)
Point Of Sales System
Allow users to purchase or make orders

•

Example of Kiosk Products:Instant Photo Booth
Banking Kiosk (money deposit, cheque)
University Information Kiosk

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Multimedia Products

Entertainment & Games
•

Most popular

•

Shipped in the form of Interactive CD / DVD ROM.

•

Characteristics of E & G Products:Immersive.
Requires constant feedback and interaction with the user.
Challenging and sometimes intriguing for user
Enabled online play for more than one user experience.

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MULTIMEDIA
COMMUNICATIONS

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Trends of next generation ICT applications
and services
Facts
◦ Network grows fast in size, capacity
and diversity
◦ Multimedia traffic becomes the largest
portions of the whole Internet traffic.
◦ Terminal become Smarter
Higher Mobility
Hand-held
Ubiquitous
Support multimedia applications
(camera, mp3, streaming)

◦ Convergences
Network convergence
Service & Application convergence
Device convergence
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University of Science and Technology

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Trends of ICT
Multimedia applications are converging toward a new form: Unified
Communication & Unified Messaging, where all traditional
communication services are combined and deliver to any device.
P2P networking is becoming a major trend that affect multimedia
applications and Internet architecture. Many of P2P mechanisms is
being reused in Grid Computing, Cloud Computing and
Ubiquitous Computing
P2P is spreading to mobile multimedia applications run over
broadband wireless infrastructure such as 3G, LTE, WiFi, WiMax thus
require significant modification in protocols.
When smart terminals are equipped with sensors (GPS, G-sensors,
etc), the system can detect and predict user’s context to deliver
appropriate information in the right time, at the right place
Ubiquitous Information System
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University of Science and Technology

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Multimedia Requirements
To develop schemes for multi-access networks which

can provide performance guarantees.
To develop a distribute route-selection strategy for
point-to-point networks.
Real-time multimedia applications require guaranteed
performance communication services, such as
throughput, delay, jitter and loss rate.
The characteristics of a source, such as peak and
average rate, are known at channel establishment
time.
Channel parameters have to be predicted in live
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Communication Service for
Multimedia
Quality-of-service (QoS) support and group communication system:
◦ Establishment and take-down of appropriately configured channels;
◦ Negotiation of QOS levels between end-systems, intermediate systems,
and network control; and....
◦ Control of the agreed QOS level
Bandwidth, delay, delay jitter (variance), and reliability.

Audio/Video groups can:
◦ have static or dynamic memberships during their lifetime,
◦ have centrally (typically sender) or distributed (typically receiver) controlled

membership,
◦ consist of members with homogeneous or be heterogeneous characteristics
and requirements.

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Multimedia Application Environment

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Multimedia Hardware/Software
Audio/Video Hardware
Digital Video (DV)
Analog to Digital devices
Built-in Hardware
Digital Video Software
Multimedia Software

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Multimedia File types
Some examples of types:
◦
◦
◦
◦
◦

Text Files: .txt, .doc, .rtf
Audio Files: .au, .aif, .wav, .mp3,
Graphic files: .jpg, .gif, .tif, .bmp, .pict, .pcx
Moving video files: .mov, .avi, .mpg, .mpeg, .mp4, 3gp, flv, mkv
Animation: .fli, .flc

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