Deep canonical time warping for simultaneous alignment and representation learning of sequences
File(s)Deep_Canonical_Time_Warping (1).pdf (3.66 MB)
Accepted version
Author(s)
Trigeorgis, G
Nicolaou, M
Schuller, B
Zafeiriou, S
Type
Journal Article
Abstract
Machine learning algorithms for the analysis of time-series often depend on the assumption that utilised data are temporally aligned. Any temporal discrepancies arising in the data is certain to lead to ill-generalisable models, which in turn fail to correctly capture properties of the task at hand. The temporal alignment of time-series is thus a crucial challenge manifesting in a multitude of applications. Nevertheless, the vast majority of algorithms oriented towards temporal alignment are either applied directly on the observation space or simply utilise linear projections - thus failing to capture complex, hierarchical non-linear representations that may prove beneficial, especially when dealing with multi-modal data (e.g., visual and acoustic information). To this end, we present Deep Canonical Time Warping (DCTW), a method that automatically learns non-linear representations of multiple time-series that are (i) maximally correlated in a shared subspace, and (ii) temporally aligned. Furthermore, we extend DCTW to a supervised setting, where during training, available labels can be utilised towards enhancing the alignment process. By means of experiments on four datasets, we show that the representations learnt significantly outperform state-of-the-art methods in temporal alignment, elegantly handling scenarios with heterogeneous feature sets, such as the temporal alignment of acoustic and visual information.
Date Issued
2018-05-01
Date Acceptance
2017-04-11
Citation
IEEE transactions on Pattern Analysis and Machine Intelligence, 2018, 40 (5), pp.1128-1138
ISSN
2160-9292
Publisher
IEEE
Start Page
1128
End Page
1138
Journal / Book Title
IEEE transactions on Pattern Analysis and Machine Intelligence
Volume
40
Issue
5
Copyright Statement
© 2016 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/J017787/1
645378
EP/H016988/1
Subjects
Science & Technology
Technology
Computer Science, Artificial Intelligence
Engineering, Electrical & Electronic
Computer Science
Engineering
Time warping
CCA
LDA
DCCA
DDA
deep learning
shared representations
DCTW
RECOGNITION
Artificial Intelligence & Image Processing
0801 Artificial Intelligence and Image Processing
0806 Information Systems
0906 Electrical and Electronic Engineering
Publication Status
Published
Date Publish Online
2017-06-08