Search Results for author: Kei Akuzawa

Found 11 papers, 0 papers with code

Multimodal Sequential Generative Models for Semi-Supervised Language Instruction Following

no code implementations29 Dec 2022 Kei Akuzawa, Yusuke Iwasawa, Yutaka Matsuo

This paper proposes using multimodal generative models for semi-supervised learning in the instruction following tasks.

Instruction Following

Conditional Deep Hierarchical Variational Autoencoder for Voice Conversion

no code implementations6 Dec 2021 Kei Akuzawa, Kotaro Onishi, Keisuke Takiguchi, Kohki Mametani, Koichiro Mori

Variational autoencoder-based voice conversion (VAE-VC) has the advantage of requiring only pairs of speeches and speaker labels for training.

Voice Conversion

Estimating Disentangled Belief about Hidden State and Hidden Task for Meta-RL

no code implementations14 May 2021 Kei Akuzawa, Yusuke Iwasawa, Yutaka Matsuo

Therefore, the meta-RL agent faces the challenge of specifying both the hidden task and states based on small amount of experience.

Inductive Bias Meta Reinforcement Learning

Information Theoretic Regularization for Learning Global Features by Sequential VAE

no code implementations1 Jan 2021 Kei Akuzawa, Yusuke Iwasawa, Yutaka Matsuo

However, by analyzing the sequential VAEs from the information theoretic perspective, we can claim that simply maximizing the MI encourages the latent variables to have redundant information and prevents the disentanglement of global and local features.

Disentanglement

Stablizing Adversarial Invariance Induction by Discriminator Matching

no code implementations25 Sep 2019 Yusuke Iwasawa, Kei Akuzawa, Yutaka Matsuo

An adversarial invariance induction (AII) shows its power on this purpose, which maximizes the proxy of the conditional entropy between representations and attributes by adversarial training between an attribute discriminator and feature extractor.

Attribute Domain Generalization +2

Adversarial Invariant Feature Learning with Accuracy Constraint for Domain Generalization

no code implementations29 Apr 2019 Kei Akuzawa, Yusuke Iwasawa, Yutaka Matsuo

However, previous domain-invariance-based methods overlooked the underlying dependency of classes on domains, which is responsible for the trade-off between classification accuracy and domain invariance.

Domain Generalization

Invariant Feature Learning by Attribute Perception Matching

no code implementations ICLR Workshop LLD 2019 Yusuke Iwasawa, Kei Akuzawa, Yutaka Matsuo

An adversarial feature learning (AFL) is a powerful framework to learn representations invariant to a nuisance attribute, which uses an adversarial game between a feature extractor and a categorical attribute classifier.

Attribute

Domain Generalization via Invariant Representation under Domain-Class Dependency

no code implementations27 Sep 2018 Kei Akuzawa, Yusuke Iwasawa, Yutaka Matsuo

Learning domain-invariant representation is a dominant approach for domain generalization, where we need to build a classifier that is robust toward domain shifts induced by change of users, acoustic or lighting conditions, etc.

Domain Generalization

Expressive Speech Synthesis via Modeling Expressions with Variational Autoencoder

no code implementations6 Apr 2018 Kei Akuzawa, Yusuke Iwasawa, Yutaka Matsuo

Recent advances in neural autoregressive models have improve the performance of speech synthesis (SS).

Expressive Speech Synthesis

Neuron as an Agent

no code implementations ICLR 2018 Shohei Ohsawa, Kei Akuzawa, Tatsuya Matsushima, Gustavo Bezerra, Yusuke Iwasawa, Hiroshi Kajino, Seiya Takenaka, Yutaka Matsuo

Existing multi-agent reinforcement learning (MARL) communication methods have relied on a trusted third party (TTP) to distribute reward to agents, leaving them inapplicable in peer-to-peer environments.

counterfactual Multi-agent Reinforcement Learning +3

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