Unformatted text preview: entation more understandable. Additionally, a full-fledged
multimedia presentation with audio, video, image and animation can be prepared and
made using this facility to make the presentation more lively and interesting and also to
greatly simplify the job of the presenter.
Screen image projectors have become a common presentation equipment today. They are
commonly used with portable notebook computers to quickly setup a modern
presentation facility at any place with great ease. Like monitors, screen image projectors
provide a temporary, soft-copy output.
Voice Response Systems
Just as a voice recognition system allows a user to talk to a computer, similarly, a voice
response system enables a computer to talk to a user. A voice response system has an
audio-response device that produces audio output. Obviously, the output is temporary,
Voice response systems are basically of two types - voice reproduction system and
speech synthesizer. They are briefly described below.
Voice Reproduction System
A voice reproduction system produces audio output by selecting an appropriate audio
output from a set of prerecorded audio responses. The set of pre-recorded audio responses
may include words, phrases or sentences spoken by human beings; music or alarms
generated by musical instruments; or any other type of sound. The actual analog
recordings of the pre-recorded sounds are first converted into digital data and then
permanently stored on the computer's disk or in its memory chip. When audio output is to
be produced, the computer selects the appropriate sound from the set of pre-recorded
sounds, the selected sound is converted back into analog form, which is then routed to a
speaker to produce the audio output.
Voice reproduction systems are very useful in a wide range of applications. Their typical
1. Audio help for guiding how to operate a system. For example, banking industry
uses voice reproduction systems in automatic teller machines to provide step-by-step
guidance to customers on how to transact with the bank using an ATM.
Automatic answering machines.
For example, telephone enquiries for new
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This document was uploaded on 04/07/2014.
- Spring '14