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Unformatted text preview: ne numbers in place of an old number, or vacancy status of a particular flight or train is often taken care of by an automatic answering machine. 3. Video games are made exciting and interesting by playing an event-based sound from a set of prerecorded sounds. 4. Talking alarm clocks. For example, every hour the clock speaks out what is the time by selecting the appropriate voice message corresponding to that hour from the set of prerecorded voice messages. Else the clock may speak "its time to wake up" at the time set for alarm. 5. Talking toys and home appliances also employ a voice reproduction system. 6. Often personal computers with audio facility are used for automated multimedia presentations during exhibitions. Speech Synthesizer A speech synthesizer converts text information into spoken sentences. To produce speech, these devices combine basic sound units called phonemes. From a given text information, sequence of words are combined into phonemes, amplified, and output through the speaker attached to the system. Speech synthesizers are still in their infancy because currently they can produce only limited unique sounds with only limited vocal inflections and phrasing. However, they are very useful in a wide range of applications. Their typical uses include: 1. For reading out text information to blind persons. For example, a recently published book may be scanned using a scanner, converted into text using OCR software, and read out to blind persons using a speech synthesizer. This will allow blind persons to know the latest information published in a book as soon as it is printed, rather than wait for the book to appear in Braille. 2. For allowing those persons who cannot speak to communicate effectively. For example, the person simply types the information and the speech synthesizer converts it into spoken words. 3. For translation systems that convert an entered text into spoken words in a selected language. For example, a foreigner coming to India may enter a text that he/she wants to communicate to an Indian and the speech syn...
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This document was uploaded on 04/07/2014.

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