When audio output is to be produced the computer

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

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, soft-copy output. 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 uses include: 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. 2. Automatic answering machines. For example, telephone enquiries for new telepho...
View Full Document

This document was uploaded on 04/07/2014.

Ask a homework question - tutors are online