•·Expensive
•·Not always easy to configure
•·Requires special hardware
•·Not always compatible
Friday, January 27, 2017
Advantages and disadvantages of Multimedia
•Advantages of Multimedia
•The use of multimedia offers many
advantages:
•1. Enhancement of Text Only Messages:
Multimedia enhances text only presentations by adding interesting sounds and
compelling visuals.
•2. Improves over Traditional Audio-Video
Presentations: Audiences are more attentive to multimedia messages than
traditional presentations done with slides or overhead transparencies.
•3. Gains and Holds Attention: People are
more interested in multimedia messages which combine the elements of text,
audio, graphics and video. Communication research has shown that the
combination of communication modes (aural and visual) offers greater
understanding and retention of information.
•4. Good for "computer-phobics":
Those who are intimidated by computer keyboards and complex instructions are
more comfortable with pressing buttons with a mouse or on a screen.
•5. Multimedia is Entertaining as Well as
Educational:
•
Future of Multimedia
•● The
technology of multimedia design utilizes various features like animation,
video, graphics, audio and sound to impress the users.
•●
Multimedia technology is used for 3D cinema applications and mobile 3DTV
environments.
•●
Animation is also being used in titling films, creating special effects or in
web entertainment programs. Thus scope of animation is huge in context to
market.
•● In
the field of education multimedia is being used extensively especially for
online courses and trainings.
Virtual Environments
•Virtual Environments: VE sometimes called
virtual reality, is an artificial environment created with computer hardware
and software and presented to the user in such a way that is appears and feels
like a real environment. A user uses
special gloves, earphones and goggles all of which receive their input from the
computer system.
Multimedia and Web Technology
•Multimedia: implies the integration of
multiple forms of media. This includes text, graphics, audio and video.
•Types of Multimedia Presentation:
•Linear Multimedia-Linear active content progresses without
any navigation control for the viewer.
•Non-linear Multimedia:
Non
Linear content offers user interactivity to control progress as used with a
computer game or used in self-paced computer based training. Non-linear content
is also known as hypermedia content.
•Linear
Multimedia
The
users sit back and watches the presentation . The presentation normally plays
from the start to end or even loops continually to present the information. A
movie is a common type of linear multimedia.
•Non-Linear Multimedia:
●
The users control the delivery of elements – to control the what and when.
●
Users have the ability to move around or follow different path through the
information presentation.
●
Advantage: complex domain of information can be presented.
●
Disadvantage: users might lost in the massive “information highway”.
●
Useful for information archive (encyclopedia), education, training and
entertainment
•Features of Multimedia.
●
Multimedia presentations
l It may be viewed in person on stage,
projected, transmitted, or played locally with a media player.
lA broadcast may be a live or recorded
multimedia presentation.
l Broadcasts and recordings can be either
analog or digital electronic media technology.
l Digital online multimedia may be
downloaded or streamed. Streaming multimedia may be live or on- demand
•Features of Multimedia
• Multimedia games and simulations may be
used in a physical environment with special effects, with multiple users in an
online network, or locally with an offline computer, game system, or simulator
•Applications of Multimedia
Creative industries-
Creative industries use multimedia for a
variety of purposes ranging from fine arts, to entertainment, to commercial
art, to journalism, to media and software services provided for any of the
industries listed below.
An
individual multimedia designer may cover the spectrum throughout their career.
Request
for their skills range from technical, to analytical and to creative
Sunday, January 22, 2017
Evolution of Mobile Communication (Itnoyon)
First Generation
The 1st commercial automated cellular network was launched by NTT in Japan in 1979, followed by the launch of Nordic Mobile Telephone (NMT) system in Denmark, Finland, Norway and Sweden, in 1981.
The 1st commercial automated cellular network was launched by NTT in Japan in 1979, followed by the launch of Nordic Mobile Telephone (NMT) system in Denmark, Finland, Norway and Sweden, in 1981.
Year – 1970 - 1980s
Standard - AMPS (Advanced Mobile
Phone System).
Services – Only Voice
Technology – Analog
Speed - 1kbps to 2.4 kbps
Multiplexing – FDMA
Switching – circuit switching
Core Network – PSTN only
Frequency – 800- 900 MHz
RF Bandwidth - 30 kHz. The band can
accommodate 832 duplex channels, among which 21 are reserved for call setup,
and the rest for voice communication
