Enrolling and matching

As with any biometric, the process begins with enrolling the subject. Once the subject is enrolled, the system can obtain the voice sample of the subject and determine whether or not there is a match.

In this section, we’ll step through the process of what happens from enrollment to matching. We will compare the different types of systems, either text dependent or text independent. Then, we’ll look at matching methods that use either template matching or feature analysis.

Let’s start with the enrollment process.

Registering with a system

A voice recognition system goes through the phases shown in the following screenshot:

Figure 8.9 – Voice recognition process

To enroll in a voice recognition system, the process goes through the following steps:

1. The subject is prompted to repeat a short passphrase or sequence of numbers.
2. The voice must pass through an ADC, and then the algorithm...