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Toru Nakashika

4 accepted papers

2019

STFT Spectral Loss for Training a Neural Speech Waveform Model

ICASSP 2019accepted

This paper proposes a new loss using short-time Fourier transform (STFT) spectra for the aim of training a high-performance neural speech waveform model that predicts raw continuous speech waveform samples directly. Not only amplitude spectra but also phase spectra obtained from generated speech wav…

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2018

Parallel-Data-Free Dictionary Learning for Voice Conversion Using Non-Negative Tucker Decomposition

ICASSP 2018accepted

Voice conversion (VC) is a technique where only speaker-specific information in source speech is converted while preserving the associated phonological information. Nonnegative Matrix Factorization (NMF)-based VC has been researched because of the natural-sounding voice it produces compared with con…

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2016

Modeling deep bidirectional relationships for image classification and generation

ICASSP 2016accepted

This paper presents a novel probabilistic model that represents a joint probability of two visible variables with a deep architecture, called a deep relational model (DRM). The model stacks several layers from one visible layer on to another visible layer, sandwiching hidden layers between them. As…

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2016

Speaker adaptive model based on Boltzmann machine for non-parallel training in voice conversion

ICASSP 2016accepted

In this paper, we present a voice conversion (VC) method that does not use any parallel data while training the model. VC is a technique where only speaker specific information in source speech is converted while keeping the phonological information unchanged. Most of the existing VC methods rely on…

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