Cited by 2,259Multimodal Machine Learning ApplicationsTime Series Analysis and ForecastingSpeech and Audio Processing

Multimodal Transformer for Unaligned Multimodal Language Sequences

Open access
Tsai, Yao-Hung Hubert, Bai, Shaojie, Liang, Paul Pu, Kolter, J. Zico, Morency, Louis-Philippe, Salakhutdinov, Ruslan·2019·Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics

Abstract

Human language is often multimodal, which comprehends a mixture of natural language, facial gestures, and acoustic behaviors. However, two major challenges in modeling such multimodal human language time-series data exist: 1) inherent data non-alignment due to variable sampling rates for the sequences from each modality; and 2) long-range dependencies between elements across modalities. In this paper, we introduce the Multimodal Transformer (MulT) to generically address the above issues in an end-to-end manner without explicitly aligning the data. At the heart of our model is the directional pairwise cross-modal attention, which attends to interactions between multimodal sequences across distinct time steps and latently adapt streams from one modality to another. Comprehensive experiments on both aligned and non-aligned multimodal time-series show that our model outperforms state-of-the-art methods by a large margin. In addition, empirical analysis suggests that correlated crossmodal signals are able to be captured by the proposed crossmodal attention mechanism in MulT.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.18653/v1/p19-1656

Cites

35 of 35 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Transformer models have been shown to be useful for temporal multimodal data by automatically aligning and capturing complementary features at different time-steps.

    “Transformer models [158] have been shown to be useful for temporal multimodal data by automatically aligning and capturing complementary features at different time-steps [154, 174].”

    From MultiBench: Multiscale Benchmarks for Multimodal Representation Learning (2021) · cites this paper as [154]

    The Abstract reports that MulT captures interactions across distinct time steps, and the Experiments report strong results on multimodal time-series. But the Proposed Method’s “Discussion about Attention & Alignment” explicitly says MulT does not resolve non-alignment by aligning the streams; it uses crossmodal attention to find relevant information instead. Thus the claim’s description of automatic alignment misstates the mechanism. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • MulT merged multiple pairwise cross-modal transformers for learning attention across modalities and then fused embedding from different modalities.

    “In MulT, multiple pairwise cross-modal transformers were merged for learning attention across modalities and then fused embedding from different modalities [86].”
  • Multimodal fusion methods improve emotion recognition performance.

    “proposed many effective multimodal fusion methods to improve the emotion recognition performance (Baltruˇ saitis et al., 2018; Tsai et al., 2019; Zhao et al., 2018).”
  • Different modalities are complementary for emotion expression.

    “Previous works have shown that these different modalities are complimentary for emotion expression”
  • TinyBERT reduces the size of transformer-based models via knowledge distillation, making them suitable for mobile deployment.

    “On the other hand, lightweight natural language processing (NLP) models such as TinyBERT [232] focus on reducing the size of transformer-based models via knowledge distillation, making them suitable for mobile deployment.”

    From Multimodal fusion and vision–language models: A survey for robot vision (2026) · cites this paper as [232]

    The Introduction and Related Works sections describe MulT, a transformer for unaligned multimodal sequences, rather than TinyBERT. Searches for TinyBERT, knowledge distillation, model compression, and mobile deployment found no passage addressing the attributed claim; page numbers were not available in our copy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 3

  1. Degottex Gilles, Kane John, Drugman Thomas, Raitio Tuomo, and Scherer Stefan. 2014 Covarepa collaborative voice analysis repository for speech technologies. In ICASSP. IEEE.
  2. Dumpala Sri Harsha, Chakraborty Rupayan, and Kopparapu Sunil Kumar. 2019 Audio-visual fusion for sentiment classification using cross-modal autoencoder. NIPS.
  3. Srivastava Nitish and Salakhutdinov Ruslan R. 2012 Multimodal learning with deep boltzmann machines. In Advances in neural information processing systems, pages 2222– 2230.

Cited by

Sorted by citations

Authors
Tsai, Y.-H. H., Bai, S., Liang, P. P., Kolter, J. Z., Morency, L.-P., & Salakhutdinov, R.
Affiliations
  • Carnegie Mellon University (US)
  • Robert Bosch (United States) (US)
Venue
Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics
Published
2019
Volume
2019
Pages
6558-6569
ISSN
0736-587X (ISSN-L)
OpenAlex
W2947476638
Cited by
2,259
References
33
Citations by year
2026: 570 · 2025: 564 · 2024: 426 · 2023: 291 · 2022: 214 · 2021: 138 · 2020: 52 · 2019: 4
FWCI
32.88
Type
conference paper
Language
en
Open access
Licence
cc-by
Locations
  • Proceedings of the conference - Association for Computational Linguistics. Meeting (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (1763562, 1750439, 1722822)
  • Nvidia
  • Defense Advanced Research Projects Agency (FA8750)
  • Samsung
  • National Institute of Mental Health (R01MH096951)
  • Air Force Research Laboratory (FA8750-18-C-0014)
Topics
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Multimodal Machine Learning Applications
  • Physical Sciences › Computer Science › Signal Processing › Time Series Analysis and Forecasting
  • Physical Sciences › Computer Science › Signal Processing › Speech and Audio Processing
Keywords
multimodal transformer, cross-modal attention, long-range dependencies, facial gestures, acoustic signals, variable sampling rate, end-to-end modeling

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review