Patent ID: 11876818
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. An anomaly detection method, comprising:
calculating, for a detection target data stream made up of a plurality of detection target data that are consecutive, a plurality of distances between the plurality of detection target data;
extracting a plurality of features of the detection target data stream using the plurality of distances calculated; and
calculating anomaly degree information about a degree of anomaly in the detection target data stream using the plurality of features extracted, wherein
the extracting of the plurality of features includes extracting the plurality of features each made up of L consecutive distances among the plurality of distances, wherein L is an integer greater than or equal to 2, and
the calculating of the anomaly degree information includes:
calculating supplementary information for each of the plurality of features extracted, using a difference in the feature, wherein the supplementary information is used to calculate the anomaly degree information; and
calculating the anomaly degree information for each of one or more information calculation target windows made up of N detection target data among the plurality of detection target data, using all items of supplementary information calculated from the N detection target data, wherein N is an integer greater than or equal to L+1.