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1. (WO2018130284) ANOMALY DETECTION OF MEDIA EVENT SEQUENCES

Pub. No.:    WO/2018/130284    International Application No.:    PCT/EP2017/050573
Publication Date: Fri Jul 20 01:59:59 CEST 2018 International Filing Date: Fri Jan 13 00:59:59 CET 2017
IPC: G06F 17/30
G06F 11/14
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
Inventors: FU, Jing
LAN, Xiaoyu
MENG, Liyi
Title: ANOMALY DETECTION OF MEDIA EVENT SEQUENCES
Abstract:
A method and detector for detecting anomalies among media event sequences are disclosed. One method includes obtaining a first profile of media event data over a first time period, where the first profile is a first distribution of different media event sequences. Each sequence is associated with a number of occurrences of the sequence and the first profile having a first profile vector. The method further includes obtaining a second profile of media event data over a second time period less than the first time period. The second profile is a second distribution of the different media sequences and the second profile having a second profile vector. The method also includes comparing the first profile vector and the second profile vector, and determining one of a presence and absence of at least one anomaly in the second profile vector of media event data based on the comparison.