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Nonlinear phenomena can be analyzed via linear techniques using operator-theoretic approaches. Data-driven method called the extended dynamic mode decomposition (EDMD) and its variants, which approximate the Koopman operator associated with…

Machine Learning · Computer Science 2022-05-18 Hiroaki Terao , Sho Shirasaka , Hideyuki Suzuki

Generating emotion-specific talking head videos from audio input is an important and complex challenge for human-machine interaction. However, emotion is highly abstract concept with ambiguous boundaries, and it necessitates disentangled…

Computer Vision and Pattern Recognition · Computer Science 2025-04-03 Xuli Shen , Hua Cai , Dingding Yu , Weilin Shen , Qing Xu , Xiangyang Xue

Decomposing multivariate time series with certain basic dynamics is crucial for understanding, predicting and controlling nonlinear spatiotemporally dynamic systems such as the brain. Dynamic mode decomposition (DMD) is a method for…

Signal Processing · Electrical Eng. & Systems 2025-07-15 Ryohei Fukuma , Yoshinobu Kawahara , Okito Yamashita , Kei Majima , Haruhiko Kishima , Takufumi Yanagisawa

Emotional expressions are the behaviors that communicate our emotional state or attitude to others. They are expressed through verbal and non-verbal communication. Complex human behavior can be understood by studying physical features from…

Computer Vision and Pattern Recognition · Computer Science 2021-09-15 Liam Schoneveld , Alice Othmani , Hazem Abdelkawy

Automatic speech emotion recognition (SER) is a challenging task that plays a crucial role in natural human-computer interaction. One of the main challenges in SER is data scarcity, i.e., insufficient amounts of carefully labeled data to…

Sound · Computer Science 2021-08-17 Sarala Padi , Seyed Omid Sadjadi , Dinesh Manocha , Ram D. Sriram

Emotional text-to-speech (E-TTS) is central to creating natural and trustworthy human-computer interaction. Existing systems typically rely on sentence-level control through predefined labels, reference audio, or natural language prompts.…

Computation and Language · Computer Science 2025-09-26 Sirui Wang , Andong Chen , Tiejun Zhao

In automatic emotion recognition (AER), labels assigned by different human annotators to the same utterance are often inconsistent due to the inherent complexity of emotion and the subjectivity of perception. Though deterministic labels…

Sound · Computer Science 2024-04-02 Wen Wu , Chao Zhang , Philip C. Woodland

Emotion recognition is a critical task in human-computer interaction, enabling more intuitive and responsive systems. This study presents a multimodal emotion recognition system that combines low-level information from audio and text,…

Audio and Speech Processing · Electrical Eng. & Systems 2025-01-23 Shamin Bin Habib Avro , Taieba Taher , Nursadul Mamun

Deep learning models for speech rely on large datasets, presenting computational challenges. Yet, performance hinges on training data size. Dataset Distillation (DD) aims to learn a smaller dataset without much performance degradation when…

This work explores the effect of gender and linguistic-based vocal variations on the accuracy of emotive expression classification. Emotive expressions are considered from the perspective of spectral features in speech (Mel-frequency…

Sound · Computer Science 2022-10-28 Zachary Dair , Ryan Donovan , Ruairi O'Reilly

In this paper a signal denoising scheme based on Empirical mode decomposition (EMD) is presented. The denoising method is a fully data driven approach. Noisy signal is decomposed adaptively into intrinsic oscillatory components called…

Information Theory · Computer Science 2014-06-02 Mina Kemiha

Despite previous success in generating audio-driven talking heads, most of the previous studies focus on the correlation between speech content and the mouth shape. Facial emotion, which is one of the most important features on natural…

Computer Vision and Pattern Recognition · Computer Science 2021-05-21 Xinya Ji , Hang Zhou , Kaisiyuan Wang , Wayne Wu , Chen Change Loy , Xun Cao , Feng Xu

Emotion understanding is a critical yet challenging task. Most existing approaches rely heavily on identity-sensitive information, such as facial expressions and speech, which raises concerns about personal privacy. To address this, we…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Deng Li , Bohao Xing , Xin Liu , Baiqiang Xia , Bihan Wen , Heikki Kälviäinen

In the era of advanced artificial intelligence and human-computer interaction, identifying emotions in spoken language is paramount. This research explores the integration of deep learning techniques in speech emotion recognition, offering…

Sound · Computer Science 2023-10-20 Hanan Hamza , Fiza Gafoor , Fathima Sithara , Gayathri Anil , V. S. Anoop

This paper introduces Dynamic Programming Encoding (DPE), a new segmentation algorithm for tokenizing sentences into subword units. We view the subword segmentation of output sentences as a latent variable that should be marginalized out…

Computation and Language · Computer Science 2020-08-04 Xuanli He , Gholamreza Haffari , Mohammad Norouzi

Expressive voice conversion (VC) conducts speaker identity conversion for emotional speakers by jointly converting speaker identity and emotional style. Emotional style modeling for arbitrary speakers in expressive VC has not been…

Audio and Speech Processing · Electrical Eng. & Systems 2024-05-06 Zongyang Du , Junchen Lu , Kun Zhou , Lakshmish Kaushik , Berrak Sisman

Extracting coherent patterns is one of the standard approaches towards understanding spatio-temporal data. Dynamic mode decomposition (DMD) is a powerful tool for extracting coherent patterns, but the original DMD and most of its variants…

Machine Learning · Computer Science 2021-02-22 Naoya Takeishi , Keisuke Fujii , Koh Takeuchi , Yoshinobu Kawahara

Dynamic Mode Decomposition (DMD) is a data-driven and model-free decomposition technique. It is suitable for revealing spatio-temporal features of both numerically and experimentally acquired data. Conceptually, DMD performs a…

Fluid Dynamics · Physics 2020-12-18 Tim Krake , Stefan Reinhardt , Marcel Hlawatsch , Bernhard Eberhardt , Daniel Weiskopf

Although automatic emotion recognition (AER) has recently drawn significant research interest, most current AER studies use manually segmented utterances, which are usually unavailable for dialogue systems. This paper proposes integrating…

Audio and Speech Processing · Electrical Eng. & Systems 2023-08-15 Wen Wu , Chao Zhang , Philip C. Woodland

Speech emotion conversion is the task of converting the expressed emotion of a spoken utterance to a target emotion while preserving the lexical content and speaker identity. While most existing works in speech emotion conversion rely on…

Audio and Speech Processing · Electrical Eng. & Systems 2024-01-09 Navin Raj Prabhu , Bunlong Lay , Simon Welker , Nale Lehmann-Willenbrock , Timo Gerkmann