Design of Speech-based Devices: A Practical Guide by Ian Pitt

By Ian Pitt

Developments in know-how have made it attainable for speech output for use in preference to the extra traditional visible interface in either household and advertisement units. Speech can be utilized in occasions the place visible consciousness is occupied, reminiscent of while using a vehicle, or the place a role is advanced and standard visible interfaces usually are not powerful, equivalent to programming a video recorder. Speech is additionally hired in professional diversifications for visually impaired people.

However, using speech has now not been universally winning, in all probability as the speech interplay is poorly designed. Speech is essentially various from textual content, and many the issues may well come up as a result of simplified text-to-speech conversion. Design of Speech-based Devices considers the issues linked to speech interplay, and gives sensible solutions.

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However, even if such information is removed we may still be left with a lengthy list of file data which is apparently all of one kind and which cannot be presented briefly. Such commands will have to be dealt with in another way, and this issue is addressed in Chapter 6. 4 The Role of Expectation As Grice pointed out, speech communication depends for its efficiency on the participants having a shared context. As a result, it is reasonable 89 to assume that each participant will have certain expectations as to what might - or could - be said next at each stage within a dialogue.

204) Thus, the new information around which a tone group is built may contain entirely new information - information that the listener has not encountered before - or information that has been presented previously but has not been mentioned for some time and which the speaker feels zz it necessary to re-introduce into the discourse. A valid test of what is and is not new information can be obtained by applying the criterion, "Present in the listener's consciousness" (Chafe, 1970). If a speaker judges that a piece of information he or she wishes to convey is not currently in the listener's consciousness, it should be presented as new information.

These guidelines can be applied to most responses generated by interactive systems, and we will look at some practical examples in later chapters. Unfortunately, this approach does not adequately deal with commands that produce list-like responses, such as requests for a list of the files in a directory. Some of the information produced by such commands can be regarded as responses to separate, specific questions. For example, if a directory-listing command automatically provides information on filesizes or disk-usage, we could remove this information and provide it only in response to specific requests.

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