SDMA: Saliency-driven mutual cross attention for multi-variate time series

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The integration of rich sensory technologies into critical applications, such as gesture recognition and building energy optimization, has highlighted the importance of intelligent time-series analytics. To accommodate this demand, uni-variate approaches have been extended for multi-variate scenarios, but naive extensions have led to a deterioration in model performances due to their limited ability to capture the information recorded in different variates and complex multi-variate time series patterns' evolution over time. Furthermore, real-world time series are often contaminated with noisy information. In this paper, we note that a time series often carries robust localized temporal events that could help improve model performance by highlighting the relevant information; however, the lack of sufficient data to train for these events makes it impossible for neural architectures to identify and make use of these temporal events. We, therefore, argue that a companion process helping identify salient events in the input time series and driving the model's attention to the associated salient sub-sequences can help with learning a high-performing network. Relying on this observation, we propose a novel Saliency-Driven Mutual Cross Attention (SDMA) framework that extracts localized temporal events and generates a saliency series to complement the input time series. We further propose an architecture that accounts for the mutual cross-talk between the input and saliency series branches where input and saliency series attend each other. Experiments show that the proposed mutually-cross attention framework can offer significant boosts in model performance when compared against non-attentioned, conventionally attentioned, and conventionally cross-attentioned models.

Original languageEnglish (US)
Title of host publicationProceedings of ICPR 2020 - 25th International Conference on Pattern Recognition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages7242-7249
Number of pages8
ISBN (Electronic)9781728188089
DOIs
StatePublished - 2020
Event25th International Conference on Pattern Recognition, ICPR 2020 - Virtual, Milan, Italy
Duration: Jan 10 2021Jan 15 2021

Publication series

NameProceedings - International Conference on Pattern Recognition
ISSN (Print)1051-4651

Conference

Conference25th International Conference on Pattern Recognition, ICPR 2020
Country/TerritoryItaly
CityVirtual, Milan
Period1/10/211/15/21

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition

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