Skill Area 212 Introduction to Multimedia Internet and
MultiMedia for SC 2
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Skill Area 212.1 Familiarise with common Multimedia Elements 1.
Define Multimedia
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What is Multimedia? Is more than one concurrent presentation
medium (on CD-ROM or a Web site). Although still images are a
different medium than text, multimedia is typically used to mean
the combination of text, sound, and/or motion video. Some people
might say that the addition of animated images produces
multimedia.
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Text and sound Text, sound, and still or animated graphic
images Text, sound, and video images Video and sound Multiple
display areas, images In live situations, the use of a speaker or
actors and "props" together with sound, images, and motion
video
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Skill Area 212.1 Familiarise with common Multimedia Elements 2.
Identify different multimedia elements: Text Graphics Sound Video
Animation
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Text Words and symbols in any form, spoken or written, are the
most common system of communication. Because of this, they are
vital elements of multimedia menus, navigation systems, and
content. From the beginning of history, humans have used graphics
and text to communicate experiences, knowledge, and feelings.
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Text With multimedia technology, text can be combined with
other media in a powerful and meaningful way to present information
and express moods.
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Text Text Should be: Appropriate for the target audience. Easy
to read Serif typecast are preferred for printed materials. Sans
serif typefaces are preferred for on- screen display.
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Text Text Should be: Formatted consistently throughout the
presentation.
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Graphics Graphics are an important part of the communication
process. They can be used to: Highlight information Set a mood or
tone Provide examples Serve as backgrounds
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Graphics The two types of graphic used in multimedia are raster
and vector. Vector graphics are made up of arcs and lines. Raster
graphics are made of dots. Raster Vector
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Graphics When using graphics, the multimedia designer must:
Determine the best balance between the size and quality. Use
appropriate graphics for the intended purpose and audience.
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Graphics When using graphics, the multimedia designer must:
Choose appropriate file formats. Standard for the Internet: JPEG(
Joint Photographer Experts Group) GIF ( Graphics Interchange File
Format) PNG ( Portable Network Graphics)
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Graphics When using graphics, the multimedia designer must:
Choose appropriate file formats. Most popular TIFF (Tagged Image
File Format) BMP ( Bitmap) PCX ( Windows Paint) PICT (
Macintosh)
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Graphics Graphics editing programs allow designers to draw,
paint, or edit images. A combination of different graphic programs
may be used in creating multimedia presentations.
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Sound Sounds in multimedia presentations could include: Music
Narrations Sound Effects Original recordings
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Sound Sound waves are vibrations that are created when we
speak. Sound waves are analog signals because they are continuous,
fluctuating waves with no interruptions.
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Sound Computers are digital machines, meaning that they
represent data with 1s and 0s. To use sound on the computer, the
sound waves must be converted from analog to digital form, or
digitalized. This conversion process is called sampling.
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Sound Audio File Formats AU (Audio) used on computers running
UNIX OS MP3 (Mpeg-1 audio layer) - very compressed file that is
popular for music stored in portable players. MIDI (Musical
Instrument Digital Interface) creating and or playing music with
instruments.
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Sound Audio File Formats WAV (Waveform) format developed
jointly by IBM and Microsoft as the native format for Windows sound
files. WMA (Windows Media Audio) - format developed by Windows to
compete with the MP3 format.
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Video Videos allow the audience to view actual events instead
of just reading about or listening to them. Sources for videos
include web sites and stock film companies.
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Video Videos vary in quality Videos can be used in: CD-ROMS
Games Presentations Video simulations Video conferences
Websites.
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Video Video Format The file format of the video determines:
Which program can open and play How much storage space it occupies.
How fast it travels over an Internet connection.
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Video Video File Formats AVI (Audio Video Interleave) Windows
format, plays in Windows Media Player Very good quality, even at
smaller resolutions Popular format for videos stored on a
computer.
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Video Video File Formats MOV (Movie) Apple format, plays in the
QuickTime Player Very good quality Popular format for videos
downloaded from the Internet.
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Video Video File Formats MPEG ( Moving pictures Expert Group)
The standard for compression and storage of audio and motion video
for use on the World Wide Web. Creates video small file sizes.
Popular format for videos downloaded from the Internet. Its biggest
advantage is that It will play in many different media
players.
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Video Video File Formats WMV ( Windows Media Video) Proprietary
video format developed by Microsoft. Plays in Windows Media Player.
Popular format for streaming video viewed over the Internet.
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Video Video File Formats FLV ( Flash Video) New file format
widely used on the Internet. Plays in Adobe Flash Player. Very
small file size. Popular format for streaming video viewed over the
Internet
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Animation 2-D and 3-D animations are useful in multimedia in
the areas of entertainment, education, and training. They can be
used to create simplified illustrations of a simulation or
dramatization.
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Animation They can be much easier to understand because they
are less complex than video. 2-D animations have smaller file sizes
that video files which means quicker loading or downloading of the
files.