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Ryuichiro Higashinaka

10 accepted papers

2025

Anomaly Detection in Human-Robot Interaction Using Multimodal Models Constructed from In-the-Wild Interactions

IROS 2025

In recent years, numerous studies have been conducted on dialogue robots powered by large language models,enabling sophisticated interactions such as providing guidance and engaging in small talk. However, the interaction performance remains imperfect, and the robots sometimes cause problems during

Cited by 0SourceScholar
2025

Investigating the Impact of Incremental Processing and Voice Activity Projection on Spoken Dialogue Systems

COLING 2025main

The naturalness of responses in spoken dialogue systems has been significantly improved by the introduction of large language models (LLMs), although many challenges remain until human-like turn-taking can be achieved. A turn-taking model called Voice Activity Projection (VAP) is gaining attention b…

2025

Universal Post-Processing Networks for Joint Optimization of Modules in Task-Oriented Dialogue Systems

AAAI 2025technical

Post-processing networks (PPNs) are components that modify the outputs of arbitrary modules in task-oriented dialogue systems and are optimized using reinforcement learning (RL) to improve the overall task completion capability of the system. However, previous PPN-based approaches have been limited…

2024

Collecting and Analyzing Dialogues in a Tagline Co-Writing Task

COLING 2024main

The potential usage scenarios of dialogue systems will be greatly expanded if they are able to collaborate more creatively with humans. Many studies have examined ways of building such systems, but most of them focus on problem-solving dialogues, and relatively little research has been done on syste…

Cited by 1SourcePDFScholar
2024

I Remember You!: SUI Corpus for Remembering and Utilizing Users’ Information in Chat-oriented Dialogue Systems

COLING 2024main

To construct a chat-oriented dialogue system that will be used for a long time by users, it is important to build a good relationship between the user and the system. To achieve a good relationship, several methods for remembering and utilizing information on users (preferences, experiences, jobs, e…

Cited by 2SourcePDFScholar
2024

JMultiWOZ: A Large-Scale Japanese Multi-Domain Task-Oriented Dialogue Dataset

COLING 2024main

Dialogue datasets are crucial for deep learning-based task-oriented dialogue system research. While numerous English language multi-domain task-oriented dialogue datasets have been developed and contributed to significant advancements in task-oriented dialogue systems, such a dataset does not exist…

2023

Enhancing Task-oriented Dialogue Systems with Generative Post-processing Networks

EMNLP 2023long main

Recently, post-processing networks (PPNs), which modify the outputs of arbitrary modules including non-differentiable ones in task-oriented dialogue systems, have been proposed. PPNs have successfully improved the dialogue performance by post-processing natural language understanding (NLU), dialogue…

Cited by 0SourceScholar
2022

Adaptive Natural Language Generation for Task-oriented Dialogue via Reinforcement Learning

COLING 2022main

When a natural language generation (NLG) component is implemented in a real-world task-oriented dialogue system, it is necessary to generate not only natural utterances as learned on training data but also utterances adapted to the dialogue environment (e.g., noise from environmental sounds) and the…

2022

Investigating person-specific errors in chat-oriented dialogue systems

ACL 2022short

Creating chatbots to behave like real people is important in terms of believability. Errors in general chatbots and chatbots that follow a rough persona have been studied, but those in chatbots that behave like real people have not been thoroughly investigated. We collected a large amount of user in…

Cited by 4SourcePDFScholar
2018

Neural Confnet Classification: Fully Neural Network Based Spoken Utterance Classification Using Word Confusion Networks

ICASSP 2018accepted

This paper describes neural ConfNet classification, a novel fully neural network based spoken utterance classification method that uses word confusion networks (ConfNets). Our motivation is to establish a spoken utterance classification method that can precisely understand natural language and robus…

Cited by 0SourceScholar