Operational evaluation modeling of automatic speaker verification systems
David E. Crabbs, John R. Clymer · NCSU Libraries Repository (North Carolina State University Libraries) · 1984
This study uses operational evaluation techniques to model a system which processes human speech to verify the identity persons seeking access to a facility resource. The system consists of hardware and software for accepting analog speech; extracting time, frequency, and amplitude characteristics; producing compact digital templates containing the features for speaker identification; and cross-referencing templates with reference patterns establish the degree of similarity between utterence and a set of utterences for the person whose identity is being claimed. decision algorithm is implemented determine whether the speaker is valid or imposter based on the degree of similarity observed.A conceptual model has been tested and used to simulate variations in system attributes in order to optimize system performance. Performance is evaluated in terms of number of imposters who can defeat system, and the number of rejected valid speakers.