Introduction to Multimedia

1. Introduction to Multimedia
Sherin Rappai
VI Sem BCA ’D’

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3. Multimedia is an interactive media and provides
multiple ways to represent information to the user in a
powerful manner. It provides an interaction between
users and digital information. It is a medium of
communication. Some of the sectors where multimedia
is used extensively are education, training, reference
material, business presentations, advertising and
documentaries.
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 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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5. Definition of
multimedia

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 Multimedia is a representation of information in an attractive and interactive manner with the use
of a combination of text, audio, video, graphics and animation.
 In other, words we can say that Multimedia is a computerized method of presenting information
combining textual data, audio, visuals (video), graphics and animations.
TEXT
AUDIO
GRAPHIC
VIDEO
ANIMATION

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 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.
 All multimedia productions contain some amount of text. The text can have
various types of fonts and sizes to suit the profession presentation of the
multimedia software.

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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).
Graphics make the multimedia application attractive. In many cases
people do not like reading large amount of textual matter on the screen.
Therefore, graphics are used more often than text to explain a concept,
present background information etc.
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9.  There are two types of Graphics:
o Bitmap images- Bitmap images are real images that can be captured
from devices such as digital cameras or scanners. Generally, bitmap
images are not editable. Bitmap images require a large amount of
memory.
o Vector Graphics- Vector graphics are drawn on the computer and
only require a small amount of memory. These graphics are editable.
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 A multimedia application may require the use of speech, music and sound
effects. These are called audio or sound element of multimedia.
 Audio are of analog and digital types. Analog audio or sound refers to the
original sound signal. Computer stores the sound in digital form.
Therefore, the sound used in multimedia application is digital audio.
 There are two basic type of audio or sound; analog and digital.
 • The original sound signal is termed as Analog audio.
 • The digital sampling of the original sound is termed as Digital audio.
 • Common file types for Audio include: MP3, WAV, WMA
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 Animation is a process of making a static image look like it is moving. An
animation is just a continuous series of still images that are displayed in a
sequence.
 The animation can be used effectively for attracting attention. Animation
also makes a presentation light and attractive. Animation is very popular
in multimedia application.
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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 Is the technology of capturing, recording, processing, transmitting, and reconstructing moving
pictures.
 The term video refers to the moving picture, accompanied by sound such as a picture in
television.
 Video is more towards photo realistic image sequence / live recording as in comparison to
animation.
 Video also takes a lot of storage space.
 Video element of multimedia application gives a lot of information in small duration of time.
 Digital video is useful in multimedia application for showing real life objects. Video have
highest performance demand on the computer memory and on the bandwidth if placed on the
internet.
 Digital video files can be stored like any other files in the computer and the quality of the video
can still be maintained. The digital video files can be transferred within a computer network. The
digital video clips can be edited easily.
 Common file types for Video include AVI, WMV, FLV, MOV, MP4
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14.  A multimedia presentation is basically a digital show whose content is
expressed through various media types like text, image, sound, video etc.
 The end users who use or watch the presentation are called viewers or
the target audience.
 Before presentation can be viewed, it has to be created. The process of
creation of presentation using multimedia elements is known as multimedia
production.
 The professionals or developers who prepare multimedia presentation are
called multimedia author.
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15.  Use of multiple media: multimedia presentation uses multimedia
elements such as text, image, graphics, video, animation etc.
Text, image (still pictures from digital camera and scanner), graphics (sketches,
diagrams and portraits) are called static multimedia elements.
 Motion picture recorded on film (combination of audio and video), motion video
recorded on magnetic media), audio, animation (display artificial scenarios) are
called time-varying multimedia element.
A multimedia presentation contains at least one static element and at least one
time-varying element.
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16.  Non-linearity: non-linearity means user can instantly navigate to different parts of the
presentation and display the frames in any way he/she chooses, without considerable
delay.
 Interactive: non-linearity is possible when user interactivity is supported by
presentation. A set of interactive elements such as buttons, menu, and hyperlink should
be provided so that user can view the part of presentation in which he is interested.
 Integrity: there may be several media types present and playing simultaneously, they
must be part of a single entity called presentation then it is known as integrity.
 Digital representation: audio and video cassette players use media recorded on
magnetic tape which create consider delay to view part of the presentation because
these are sequential access devices.
 If presentation is stored in a computer using random storage device such as hard disk,
and compact disk part of presentation can be accessed without delay. If presentation is
digitally stored we can use softwares to manipulate presentation, which is a big
advantage over storing presentation in analog format.
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