Faculty Profiles - HARA Sunao

MISC - HARA Sunao

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D-9-4 Individual behavior analysis by comparing GPS logs with others

Seto Ryo, Abe Masanobu, Hara Sunao

Proceedings of the IEICE General Conference 2014 ( 1 ) 88 - 88 2014.3

A development of a smart-device application for environmental sound collection based on crowdsourcing approach

Sunao Hara, Akinori Kasai, Masanobu Abe, Noboru Sonehara

IEICE Technical Report 113 ( 479 ) 29 - 34 2014.3

Authorship：Lead author Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

In this study, we aimed to construct environmental sound database for various sounds as Wisdom of the crowds. For example, considering environmental noise-pollution problems as a kind of the environmental sound, we need to consider not only signature sound, e.g. car noise and railway noise, but also life-space noise, e.g. festivity noise on streets or in parks. However, daily/widely sound collection is difficult to substantiate by few participant. Therefore, we aimed to measure environmental sound covered a vast area by applying crowdsourcing approach. First, we develop a prototype application which is run on the smart device with Android OS, and then we develop a prototype server system for collection and browsing the collected sound data. Then, we calibrated noise level measured by smart devices and carried out a sound collection experiment for validate an accuracy of sensors on the smart devices. As a result of the experiment, we collected nine hundred minutes of sound data, and analyzed the relationships between the measured noise level and some subjective evaluations.

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Evaluation of HMM-based speech synthesis using high-frequency component of speech waveform

349 - 352 2014

Relationship between the size of speech database and subjective scores on phone-sized unit selection speech synthesis

331 - 334 2014

Sound-map construction method based on symbolization for environmental sounds collected by crowd-sensing

1535 - 1538 2014

Estimation of fuel consumption using an acoustic signal and multi-sensing signals of smartphone

NANBA Shohei, HARA Sunao, HARA Sunao

IEICE technical report. Signal processing 113 ( 28 ) 1 - 6 2013.5

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

Fuel-consumption meters are equipped with many vehicles, however, they can only show the fuel-consumption/-efficiency value but not allow to use for other purpose, e.g., gathering, analyzing, etc. One of a method to output vehicles data is to use a diagnostic connector having compliant with OBD2 standards, that can output several vehicles' signals, such as, velocity, revolution of engine, and fuel consumption. However, because the protocols depend on manufactures or types of the vehicles, the method is not easy to use for the public. In this study, we aim to estimate the fuel consumption using acoustic signals and several sensor's signals equipped with a smartphone. An estimation of a number of revolutions of engine and an estimation of torque are needed for the estimation of fuel consumption. For the estimation of the number of revolutions, we analyze the acoustic signals from the engine by fast Fourier transform and calculate the estimation value from acoustic signal reducing road-noise approximated as a Gamma mixture distribution. For the estimation of the torque, we use physics of the car with the outputs of several sensors and the vehicle's data. We finally get the fuel consumption refer to a table of fuel-consumption rate, which is created in advance, by the estimated number of revolutions and the estimated torque. As a result of a experiment for the estimation of fuel-consumption, we can achieved a acceptable values of instantaneous fuel consumption, although values of average fuel comsumption have some errors.

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The Individual Feature Analysis of the Network of the Stay Extracted from GPS Data

FUJIOKA Daisuke, HARA Sunao, ABE Masanobu

IEICE technical report. Life intelligence and office information systems 112 ( 466 ) 179 - 184 2013.3

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

In this paper, we propose a novel technique for behavior analysis focusing on a structure of a personal "stay" network obtained by GPS data. We analyzed network features, which is called scale-free property, small-world property and cluster-state property, for six subjects. We also analyzed a distribution of a feature. that is called "motif, and then compared with other networks based on these features. We evaluated biases of a degree of a hub and a unique number of connection nodes, and clarified a difference between distributions of each subjects' networks.

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Examination of an event sampling process with the similar impression from the others' life log

HAMANO Kazuto, ABE Masanobu, HARA Sunao, FUJIOKA Daisuke, MOTIZUKI Rika, WATANABE Tomoki

IEICE technical report. Life intelligence and office information systems 112 ( 466 ) 173 - 178 2013.3

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

When we tell a story of our experience, we try to describe the story replacing our experience with other's one that can recall a similar impression to help understanding of the story. In this paper, we study about an extraction method of a common sense of impressive event between people having different backgounds and experiences. First, we showed several emotional words to the subjects and then asked them to recall the events matching the words. Using the recalled events, we compared two method for evaluate the similarity of the events; a method is based on quantification of the events by his/her emotion with five point scale, and the another one is based on decision the similarity of the event by discussion between two subjects. Experimental result suggested that the decision of the similarity by discussion is heavily affected by the strong emotion of the event.

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音声情報案内システムにおけるBag‐of‐Wordsを用いた無効入力棄却モデルの可搬性の評価

真嶋温佳, TORRES Rafael, 川波弘道, 原直, 松井知子, 猿渡洋, 鹿野清宏

日本音響学会研究発表会講演論文集(CD-ROM) 2013 ROMBUNNO.3-9-5 2013.3

The 2nd stage activity report of ASJ students and young researchers forum

Okamoto Takuma, Okuzono Takeshi, Kidani Shunsuke, Hara Sunao, Ohta Tatsuya, Imoto Keisuke

THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN 69 ( 9 ) 519 - 520 2013

音声情報システムにおける最大エントロピー法を用いた無効入力棄却の評価

真嶋温佳, TORRES Rafael, 川波弘道, 原直, 松井知子, 猿渡洋, 鹿野清宏

日本音響学会研究発表会講演論文集(CD-ROM) 2012 ROMBUNNO.3-1-8 2012.9

Invalid Input Rejection Using Bag-of-Words for Speech-Oriented Guidance System

Majima Haruka, Fujita Yoko, Torres Rafael, Kawanami Hiromichi, Hara Sunao, Matsui Tomoko, Saruwatari Hiroshi, Shikano Kiyohiro

IPSJ SIG Notes 2012 ( 7 ) 1 - 6 2012.7

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

On a real environment speech-oriented information guidance system, a valid and invalid input discrimination is important as invalid inputs such as noise, laugh, cough and utterances between users lead to unpredictable system responses. Generally, acoustic features are used for discrimination. Comparing acoustic likelihoods of GMMs (Gaussian Mixture Models) from speech data and noise data is one of the typical methods. In addition to that, using linguistic features is considered to improve discrimination accuracy as it reflects the task-domain of invalid inputs and meaningless recognition re...

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New Speech Research Paradigm in the Cloud Era

Tomoyoshi Akiba, Koji Iwano, Jun Ogata, Tetsuji Ogawa, Nobutaka Ono, Takahiro Shinozaki, Koichi Shinoda, Hiroaki Nanjo, Hiromitsu Nishizaki, Masafumi Nishida, Ryuichi Nishimura, Sunao Hara, Takaaki Hori

IPSJ SIG Notes 2012 ( 4 ) 1 - 7 2012.7

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Recently most individuals have come to use mobile information devices, and daily upload the information obtained by such devices to Internet Cloud. Accordingly the applications of speech information processing have been changing drastically. We need to create a new paradigm for the research and development of speech information processing to adapt to this change. In this paper, we summarize the state-of-the-art speech technologies, propose how to create a research platform for this new paradigm, and discuss the problems we should solve to realize it.

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Design of a network service for developing a speech-oriented guidance system used on mobile comuputers

Sunao Hara, Hiromichi Kawanami, Hiroshi Saruwatari, Kiyohiro Shikano

IPSJ SIG Notes 2012 ( 1 ) 1 - 6 2012.7

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

In this paper we propose a novel speech service software for speech-oriented guidance systems. This software has been developed based on Takemaru-kun system, that is implemented at a community center since Nov. 2002. It is consisted of several modules, such as, Automatic Speech Recognition, Dialog Management, Text-to-Speech, Internet browser, and Computer Graphic Agent. This software and toolkit is plan to be freely distributed. It will be used as the speech service software as Software-as-a-Service (SaaS) for WWW site developers, and also used for an upgrade system of our system for advanc...

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D-9-36 DEVELOPMENT OF A SPEECH-ORIENTED GUIDANCE PLATFORM AS A SOFTWARE-AS-A-SERVICE FOR VARIOUS USAGE AND ENVIRONEMENTS

Hara Sunao, Kawanami Hiromichi, Saruwatari Hiroshi, Shikano Kiyohiro

Proceedings of the IEICE General Conference 2012 ( 1 ) 168 - 168 2012.3

Multi-band Speech Recognition using Confidence of Blind Source Separation

ANDO Atsushi, OHASHI Hiromasa, HARA Sunao, KITAOKA Norihide, TAKEDA Kazuya

IEICE technical report. Speech 111 ( 431 ) 219 - 224 2012.2

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

One of the main applications of Blind Source Separation (BSS) is to improve performance of Automatic Speech Recognition (ASR) systems. However, conventional BSS algorithm has been applied only to speech signals as a pre-processing approach. In this paper, a closely coupled framework between FDICA-based BSS algorithm and speech recognition system is proposed. In the source separation step, a confidence score of the separation accuracy for each frequency bin is first estimated. Subsequently, by employing multi-band speech recognition system, acoustic likelihood is calculated in the Mel-scale filter bank energy using the estimated BSS confidence scores. Therefore, our proposed method can reduce ASR errors which caused by separation errors in BSS and permutation errors in ICA, as in the conventional approach. Experimental results showed that our proposed method improved word correct rate of ASR by 8.2 % and word accuracy rate by 5.7 % on average.

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多様な利用環境における音声情報案内サービスソフトウェアの開発

原直

信学総大講演論文集, 2012 168 2012

Robust Acoustic Modeling Using MLLR Transformation-based Speech Feature Generation

2010 ( 5 ) 1 - 6 2011.2

MLLR変換行列により制約された音響特徴量生成による頑健な音響モデル (音声)

伊藤新, 原直, 北岡教英

電子情報通信学会技術研究報告 110 ( 357 ) 55 - 60 2010.12

Music recommendation system based on chat speech recognition

OHASHI Hiromasa, KITAOKA Norihide, HARA Sunao, TAKEDA Kazuya

IEICE technical report 110 ( 220 ) 59 - 64 2010.10

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

We developed an ambient system that plays a music suitable for the mood of a human-human conversation using words obtained from a continuous speech recognition system. Using the correspondent between a document space based on the texts related to the musics and an acoustic space that express various audio features, the continuous speech recognition results are mapped to an acoustic space. Proper names, which are not coverd by the continuous speech recognizer, are recognized by a wordspotter. In this paper, we show the result of the perfomance evaluation for the system. For read music review texts, the system obtained in MRR of 0.83, which is not bad, with high WER of 70.55%, not low F measure of 31.58. We also show an example result for chat conversations.

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