Why Designing a Speech-Recognition Application Is Challenging

Think back to the AirTran example in Chapter 1. It was very short, wasn't it? Look how many points of discussion it raised—and we're only scratching the surface. Speech-recognition applications are powerful because they are apparently simple. Touchtone systems really are simple because callers know that their responses are limited to pressing any of 12 keys. And in a person-to-person conversation, people can reasonably expect that the person on the other end of the line can understand most spoken ideas. Speech-recognition systems fit somewhere in the middle. They have a seemingly natural interface, but the recognition application doesn't yet converse on a human level.

Callers don't ...

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