View
73
Download
0
Category
Tags:
Preview:
Citation preview
What is Mult imedia?
Derived from the word “Multi” and “Media”Multi
Many, Multiple,
MediaTools 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.
Definit ion of Mult imedia
Multimedia is a combination of text, graphic, sound, animation, and video that is delivered interactively to the user by electronic or digitally manipulated means.
TEXT
AUDIO
GRAPHIC
VIDEO
ANIMATION
Elements of Mult imedia
TEXTTEXT
AUDIO
GRAPHIC
VIDEO
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
Elements of Mult imedia
GRAPHICTEXT
AUDIO
GRAPHIC
VIDEO
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).
Elements of Mult imedia
AUDIOTEXT
AUDIO
GRAPHIC
VIDEO
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.
Elements of Mult imedia
ANIMATIONTEXT
AUDIO
GRAPHIC
VIDEO
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.
Elements of Mult imedia
VIDEOTEXT
AUDIO
GRAPHIC
VIDEO
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.
Interactive Multimedia
When the user is given the option of controlling the elements.
Hyper MediaA combination of hypertext, graphics,
audio, video, (linked elements) and interactivity culminating in a complete, non-linear computer-based experience.
Linear VS Non-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
LINEAR
Linear VS Non-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
NON-LINEAR
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).
Authoring Tools Example:
Macromedia Authorware Macromedia Director Macromedia Flash Microsoft Power Point
Importance of Multimedia
There are a number of fields where multimedia could be of use. Examples are:-BusinessEducationEntertainmentHomePublic Places
Importance of Multimedia
BusinessUse and Applications
Sales / Marketing PresentationTrade show productionStaff Training ApplicationCompany Kiosk
Importance of Multimedia
EducationUse and Applications
Courseware / SimulationsE-Learning / Distance LearningInformation Searching
Importance of Multimedia
EntertainmentUse and Applications
Games (Leisure / Educational)MoviesVideo on Demand
Online
Importance of Multimedia
HomeUse and Applications
TelevisionSatellite TVSMS services (chats, voting, reality TV)
S E A R C H E N G I N E
“Searching The Internet Requires Part Skills, Part Luck & Little Bit Of Art”
Search Engine
Search engine is a software program that searches for sites based on words that you designate as search terms
Search engines look thru’ their own database of info to find what you are looking for
Search engines don’t search the entire web page, thus they make overlook the info
Examples of Search Engine
• Conventional (library catalog) : Search by keyword, title, author, etc.
• Text-based (Lexis-Nexis, Google, Yahoo!): Search by keywords. Limited search using queries in natural language.
• Multimedia (QBIC, WebSeek, SaFe) : Search by visual appearance (shapes, colors,… ).
• Question answering systems (Ask, NSIR, Answerbus) : Search in (restricted) natural language
• Clustering systems (Vivísimo, Clusty)• Research systems (Lemur, Nutch)
What does it take to build a search engine?
• Decide what to index• Collect it• Index it (efficiently)• Keep the index up to date• Provide user-friendly query facilities
What else?
• Understand the structure of the web for efficient crawling
• Understand user information needs• Preprocess text and other unstructured
data• Cluster data• Classify data• Evaluate performance
They search the Internet or select pieces of the Internet based on important words.
They keep an index of the words they find, and where they find them.
They allow users to look for words or combinations of words found in that index.
Working of Search Engine
Akhil Kaushik 30
Working of Search Engine
To find information on the hundreds of millions of Web pages that exist, a search engine employs special software robots, called spiders, to build lists of the words found on Web sites.
When a spider is building its lists, the process is called Web crawling.
The usual starting points are lists of heavily used servers and very popular pages.
The spider will begin with a popular site, indexing the words on its pages and following every link found within the site.
In this way, the spidering system quickly begins to travel, spreading out across the most widely used portions of the Web.
Spiders return to already crawled websites looking for updates or changes.
Working of Search Engine
Akhil Kaushik 33
Building the Index
There are two key components involved in making the gathered data accessible to users:
The information stored with the dataThe method by which the information
is indexed
Building a Search
The Boolean operators most often seen are: AND - All the terms joined by "AND" must appear in the pages or
documents. OR - At least one of the terms joined by "OR" must appear in the
pages or documents. NOT - The term or terms following "NOT" must not appear in the
pages or documents. Quotation Marks - The words between the quotation marks are
treated as a phrase, and that phrase must be found within the document or file.
FOLLOWED BY - One of the terms must be directly followed by the other.
NEAR - One of the terms must be within a specified number of words of the other.
It is a search tool that sends user requests to several other search engines and /or databases and aggregates the result into a single list or displays them according to their source
It enable users to enter search criteria once & access several search engines simultaneously
It has a virtual database to compile the result Ex: www.dogpile.com
Meta Search Engine
Akhil Kaushik 36
Recommended