Professor 
Associate Professor 
Visiting Researcher 
Each member of the Human Interface Laboratory has own interests and does independent research activities: Prof. Masahide Sugiyama:
Prof. Jie Huang:

[sugiyama01:2008] 
M. Sugiyama. On Search Efficiency Comparison of ℓ p Distancebased
Time Series Active Search Algorithm. Trans. of IEICE, J91D(8):2071–
2079, Aug. 2008. 
Active search (TAS) algorithm for query search in timeseries data can be formulated
using ℓ p distance metrics with an arbitrary real number p 1. This paper derives
an estimation formula of number of distance calculations and shows analytically and
experimentally that ℓ 1 distance gives the minimum number of distance calculations
among ℓ p distance in TAS. TAS algorithm has been proposed in order to find specified
queries in timeseries data efficiently. TAS algorithm makes use of calculated distance
value to skip and reduce distance calculations. The conventional distancebased TAS is
carried out using ℓ 1 distance because ℓ 1 distance corresponds to similarity measure
between normalized histograms (output probabilities). The result of this paper gives a
positive basis that ℓ 1 distance is the best distance among ℓ p distance. 
[jhuang01:2008] 
K. Tanno, A. Saji, S. Ito, J. Huang, and W. Hatano. A precise sound
image panning method for side areas using 5.1 channel audio systems. In AES
35th Int. Conf. AES, Feb. 2009. 
5.1 channel home theater systems have been widely used for home audio systems and also
for high reality game audio systems. In this research, we have conducted two experiments
to improve the precision and clarity of sound image creation and reproduction in the
side areas. The experimental setup was to change the intensity ratios between the two
left speakers, L and SL, and ask the listeners about the directions and clarity of the
sound images. From the results, we found the traditional amplitude panning method
in the side areas is not linear and asymmetrical, and the motion is almost obtained on
the middle range of intensity ratios. Based on the localization curve obtained in this
experiment, we can compensate the nonlinearity and asymmetry of sound panning. We
also added the frequency characteristics of HRTF to the sound signals assigned to L and
SL speakers by amplitude panning method. This changes of frequency characteristics
can increase the reality of the sound signals to the near ear, and improve the precision
and clarity of sound images in the side areas. 

[sugiyama02:2008] 
K. Watanabe and M. Sugiyama. Automatic Correspondence Calculation
between Text and Speech for Authoring Digital Talking Book. In Proc.
of CBMI2008, pages 55  161, June 2008. 
The present paper proposes applying the VoicePause (VP) method to authoring DAISY
talking books used by visually impaired people. The proposed method enables authors
to automatically calculate the time information of sentencebased correspondence between
Japanese text and the corresponding audio data, reducing the time required to
perform searches. While there have been several related studies that calculate the time
information of the correspondence, they require the input audio data to have a specific
speech style and to be short in duration. Therefore, in the present paper, the proposed
VP method was used to determine the average gap time and the sentence detection rate
for databases having different speech styles and for input audio data having long durations.
The experimental results show that the average gap time was approximately 0.38
sec and the sentence detection rate was approximately 94% and these are independent
of speech style. The proposed VP method performs well and is efficient compared with
methods proposed in previous studies. 

[sugiyama03:2008] 
K. Sugai and M. Sugiyama. A New Implementation of Similar Segment
Search in an Arbitrary Number of TimeSeries. In Proc. of CIT, pages 13
 118, July 2008. 
This paper proposes a new implementation of a similar segment search algorithm in
an arbitrary number of timeseries. Recursive Diamond Division Search (RDDS) can
theoretically search for similar segments in any arbitrary number of timeseries. Previous
implementations were based on the number of loops, which corresponded to the number
of the given timeseries; RDDS2 and RDDS3 were implemented for two timeseries
and three timeseries, respectively. This new implementation RDDSn can process an
arbitrary number of timeseries. For three timeseries, RDDSn with n = 3 achieves the
same processing time as RDDS3. The new implementation is evaluated with 3, 4 and
5 timeseries to show its effectiveness. 
[sugiyama04:2008] 
K. Sugai, H. Hashimoto, and M. Sugiyama. Evaluation of End
Boundary Processing in RDDS Similar Segment Search Algorithm. In Proc.
of ASJ Spring Meeting, pages 2–5–4, Japan, Mar. 2009. ASJ 
[sugiyama05:2008] 
K. Sugai and M. Sugiyama. Similar Segment Search in Multiple
TimeSeries Using RDDS Clustering Techniques. In Proc. of ASJ Spring Meeting,
pages 2–5–3, Japan, Mar. 2009. ASJ. 
[sugiyama06:2008] 
Masahide Sugiyama. Similar Segment Clustering of RDDS Outputs.
In Proc. of ASJ Spring Meeting, pages 21021, Japan, Mar. 2008. ASJ. 
[jhuang02:2008] 
Jie Huang. Sound localization for robot navigation. INTECH, Vienna,
2009. 
[sugiyama07:2008] 
Masahide Sugiyama, 2008. Reviewer of ASJ Transaction 
[sugiyama08:2008] 
Masahide Sugiyama, 2008. Reviewer of IEICE Transaction 
[sugiyama09:2008] 
Masahide Sugiyama, 2008. Board member of IEEE Sendai Chapter 
[jhuang03:2008 
Mari Anzai. Spatial perception with different types of sound stimuli,
University of Aizu, 2008. Thesis Advisor: Huang, J 
[jhuang04:2008] 
Kentaro Kogure. Elevation perception with smoothed HRTFs, University
of Aizu, 2008. Thesis Advisor: Huang, J 
[jhuang05:2008] 
Naomi Tayama. 3D sound creation by a horizontally arranged 5
channel loudspeaker system, University of Aizu, 2008. Thesis Advisor: Huang, J 
[jhuang06:2008] 
Yuki Tomotaki. Creation of frontal sound images with loudspeakers
located near the ears, University of Aizu, 2008. Thesis Advisor: Huang, J 
[jhuang07:2008] 
Takuya Maeda. Environmental sound analysis and generation, University
of Aizu, 2008. Thesis Advisor: Huang, J 
[jhuang08:2008] 
Kensuke Kusaura. Approximation of HRTFs by Gaussian distribution
curves, University of Aizu, 2008. Thesis Advisor: Huang, J and Guo, M 