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152 CHAPTER 5 ■ SPEECH

5.2 Speech Recognition

In this section, I’ll show you two ways to create a speech recognition engine: the first using Java
and the second using JNI. In these two examples, I’ll show the two ways of speech recognition:
one using continuous dictation, and one using command and control. Also, because I’m going
to use two different implementations, I’ll create an interface that both will implement.
A class diagram of the classes I’ll create in this section is shown in Figure 5-4.

Figure 5-4. Recognition classes

Code Objective
The objective of this section is to create an interface that standardizes behavior between the
two implementing speech recognition classes.

Code Discussion

This interface includes five methods. The open() and close() methods allocate and deallocate
the same way that the JVoice interfaces implementation classes do. The start() method starts
the recording device(), while the stop() method stops the recording device. Finally, the listen()
method returns a String of the spoken phrase or word. See Example 5-11.