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

By Ian Pitt

Developments in know-how have made it attainable for speech output for use as opposed to the extra ordinary visible interface in either household and advertisement units. Speech can be utilized in events the place visible awareness is occupied, reminiscent of whilst riding a automobile, or the place a role is advanced and conventional visible interfaces usually are not potent, equivalent to programming a video recorder. Speech is also hired in professional diversifications for visually impaired people.

However, using speech has no longer been universally profitable, in all likelihood as the speech interplay is poorly designed. Speech is essentially assorted from textual content, and many the issues may possibly come up as a result of simplified text-to-speech conversion. Design of Speech-based Devices considers the issues linked to speech interplay, and provides useful solutions.

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Extra resources for Design of Speech-based Devices: A Practical Guide

Sample text

Halliday defines new information as follows. It is new, he suggests, ... not in the sense that it cannot have been previously mentioned, although it is often the case that it has not, but in the sense that the speaker presents it as not being recoverable from the preceding discourse. (Halliday, 1967a, p. 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.

For instance, the speaker will make judgements as to what information will be new to the listener, and will present that information appropriately according to the kind of rules outlined above. The human speaker will also instinctively know when it is appropriate to pause to allow time for the information to "sink in". Human dialogue is also interactive, so if the speaker makes incorrect assumptions (such as assuming that information is new when it is not) this will become apparent within the dialogue and the participants will attempt to repair the error.

Prosody is used to signal the start and end of the list, and to give the listener an approximate idea of the length of the list and the position of the current item within it (see Chapter 6). If an attempt to copy a group of files is unsuccessful, DOStalk will return a "failure" tone accompanied, where appropriate, by the phrase "System error". If some of the specified files were copied but not others, pressing More Information will elicit a message of the form "x out of y files copied", where x is the number of files successfully copied and y is the number of files that match the specification.

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