Patent ID: 11868199
Assignee: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for setting a threshold of a system for detecting an anomaly, the method comprising:
setting, by a processor, a minimum true positive rate (TPR) and a differentiation slope based on a user input;
creating, by the processor, a receiver operating characteristic (ROC) curve using anomaly data and normal data;
estimating, by the processor, a true negative rate (TNR) from the ROC curve based on the minimum TPR and the differentiation slope; and
estimating and setting, by the processor, the threshold based on the estimated TNR;
selecting, by the processor, one of at least one speech recognition engine based on the estimated threshold in response to receiving a speech signal from the outside using a microphone; and
performing, by the processor, speech recognition on the speech signal using the selected speech recognition engine,
wherein the threshold is automatically reset when a processing region of the at least one speech recognition engine is changed or a new speech recognition engine is introduced.