Transcript Multimedia on the Web

Lesson 5
MULTIMEDIA
Multimedia on the Web has expanded
rapidly as broadband connections
have allowed users to connect at
faster speeds. Almost all Web sites,
including corporate sites, feature
multimedia content and interactive
objects use multimedia.
 Object-oriented
programming is the
term for the programming concept in
which a program is handled as a
collection of individual items that
perform separate functions, rather
than as a sequence of statements that
performs a specific task.
Programming Languages

C++ is the language is considered the best language for creating large
applications.

Java is an object-oriented programming language developed by Sun
Microsystems that is often used when data needs to be shared across a
network.

Java Applet is a miniature Java program that is downloaded into a Web
browser when a user requests a Web page.

Java applets and ActiveX allow information to be downloaded and run
on your system. These security risk is something you must be aware of
when using active content such as Java applets and ActiveX objects.

JavaScript is considered an event-driven scripting language and must
reside within HTML documents to run. It is a scripting language that is the
Microsoft version of JScript.

Web pages that use ActiveX can include animation, audio and video.

VBScript is a scripting language that is vendor-specific to Microsoft and
may not be supported by browsers other than Windows Internet Explorer
HTML5

HTML5’s major goal is to eliminate the use of
browser plug-ins.

Why is the acceptance of HTML5 in the Web
community a benefit to users of mobile devices?
The use of HTML5 can help conserve battery
power.
Plug-ins

Plug is a program installed in the browser to
extend its basic functionality

Plug-ins retrieve a small portion of a file at a time
and deliver enough information to build a
continuous stream to data to eliminate transfer
delays when files are played from a browser .

There primary goal is to provide efficient
integration of multimedia formats with the browser
and computer.
Compression

Data Compression is needed to
reduce the size of data file transfer
on the internet.

Lossless compression is when all the
original data can be recovered
when the file is decompressed

Lossy Compression is a compression
in which some of the information is
permanently eliminated.
Plug-in Installation

Offline installation is the plug-in
installation that requires the user to
download the plug-in file, quit the
browser and start the installation
file.

Online installation usually occurs
with the browser open.
Types of Plug-Ins

Audio and video files are compressed before they are
transferred across the Internet to shorten the amount of
time required to download them.

Codec is the term for algorithm used by video and audio
player plug-ins to compress and decompress files.

Vector graphics produced graphics image files that are
small, download quickly, and are easily resized without
affecting image quality. These are mathematical
statements that describe a series of points to be
connected to create an image.

Silverlight= plug-ins that was developed by Microsoft and is
a software development tool used to write and run
Internet applications.

Quicktime created by Apple Computer for running video
and audio files.

QuickTime Virtual Reality (QTVR) is the following products
that can be sued to expand a two-dimensional
photograph into a three-dimensional environment.

Add-ons are extensions and plugins used to extend the functionality
of the Firefox Web browser.

Viewer= an application used to
retrieve a file when the program
needed to open the file type is not
installed on your computer.

Portable Document Format (PDF)
retains formatting information
through all platforms and
downloads quickly from the Web




An element on a Web page that
contains data and procedures for
how that item will react when
activated.
PS is the following graphics file formats
that is written in a page description
language that is unreadable, and can
be printed only on a specific type of
printer.
Most browsers are able to save all
images, fonts and scripts referenced
by the HTML on a page.
Copyright law protects original works
of authorship online as well as in print.
Video File Formats
File Name Extension
Description
.avi
Standard video files for Windows
.mov & .qt
Standard formats for QuickTime movies. Made
by Macintosh
Mp4
Standard format for movies on the internet
.ogg
Video format designed for HTML5 video
.webm
Royalty-free, open video and audio format
designed for HTML5 video
Audio Files

MIDI is the name for the standard
computer interface that allows
computers to create and play
electronic music.

Waveform (WAV) format is the
native sound format for Windows.

Ogg Vorbis= is the following audio
file formats is a free, open-source
alternative to the MP3 format
Graphics

.png
open-source format commonly
used for photographs

.gif limited to 256 colors commonly
used for drawings in HTML documents

.jpg or .jpeg- supports 16 million colors
commonly used for photographs and
it’s a lossy compression.

Tif or .tiff – supports 24-bit color
palettes common for desktop
publishing
Document

.txt-plain ASCII text file

.pdf – read on any platform

.doc or .docx – Microsoft Word
format

.odt- open office writer format

.rtf – compatible with many
applications on any platform