On Tuesday, November 11, we held a welcome party for four third-year students who recently joined our laboratory: Nakamura, Ueki, Naijou, and Suzuki.
2025 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS 2025)
At the 2025 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS 2025), held in Bandung from November 4 to 7, Mr. Yamamura and Ms. Morikawa presented the following papers.
- Naoya Yamamura, Chenyu Zhao, Hiroshi Tsutsui, Takeo Ohgane, “Evaluation of Bit-Width Effects in Fixed-Point FPGA-Optimized MFCC Computation via Software Simulation for HMM-Based Phrase Speech Recognition,” Proceedings of International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), Nov. 2025.
- Yuzuki Morikawa, Chenyu Zhao, Hiroshi Tsutsui, Takeo Ohgane, “Accuracy Evaluation of a Streaming-Based Resource-Efficient Mel Filter Bank Architecture with Fixed-Point Based Design Approaches,” Proceedings of International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), Nov. 2025.
2025 Joint Convention, the Hokkaido Chapters of the Institutes of Electrical and Information Engineers
Mr. Shimizu, Mr. Iura, Mr. Yamamura, Mr. Hori, and Mr. Kawashima presented their works at 2025 Joint Convention, the Hokkaido Chapters of the Institutes of Electrical and Information Engineers, which was held at Muroran Institute of Technology on Nov 2nd-3rd.
- Kodai Shimizu, Hiroshi Tsutsui, Takeo Ohgane, "An Evaluation of Parking Status Change Detection Using GMM-Based Analysis of Background-Subtraction Difference Distributionsfor Parking Lot Monitoring Systems in Snowy Conditions," Joint Conference of Electrical, Electronics and Information Engineers in Hokkaido, pp. 25-26, Nov. 2025 (in Japanese). [URL]
- Taiyoh Kawashima, Yuito Ishisaki, Hiroshi Tsutsui, Takeo Ohgane, "Experimental Evaluation of Energy Consumption for a LoRa-based Environmental Sensing System,"Joint Conference of Electrical, Electronics and Information Engineers in Hokkaido, p. 217, Nov. 2025 (in Japanese). [URL]
- Takayuki Iura, Hiroshi Tsutsui, Takeo Ohgane, "Evaluation of the Effect of Loudspeaker Placement on Active Noise Control Performance for Indoor Reduction of Outdoor Noise," Joint Conference of Electrical, Electronics and Information Engineers in Hokkaido, p. 112, Nov. 2025 (in Japanese). [URL]
- Taishin Hori, Chenyu Zhao, Hiroshi Tsutsui, Takeo Ohgane, "An Evaluation of Parameters for Log-Mel Spectrum Calculation in Anomalous Sound Detection Using Spiking Neural Networks," Joint Conference of Electrical, Electronics and Information Engineers in Hokkaido, p. 113, Nov. 2025 (in Japanese). [URL]
- Naoya Yamamura, Chenyu Zhao, Hiroshi Tsutsui, Takeo Ohgane, "Evaluation of Bit-Width Effects in Fixed-Point FPGA-Optimized MFCC Computation via Software Simulation for HMM-Based Phrase Speech Recognition Using Delta Features," Joint Conference of Electrical, Electronics and Information Engineers in Hokkaido, p. 114, Nov. 2025 (in Japanese). [URL]
A student networking event was held during this convention. Students made presentations about their university, research activity, and student activity. From our laboratory, Ms. Morikawa, the treasurer of IEEE Hokkaido University Student Branch gave a presentation on the activities of the IEEE Student Branch and the benefits of establishing a branch.
Lab orientation/tour for 3rd-year undergraduate students, 2025
We will conduct a laboratory orientation for third-year undergraduate students as per the following schedule:
- Location: 11-12, IST Building 11th floor
- Date and Time: Oct 17 (Fri) at 13:00-, 14:00-
(Please try to join us at an earlier time if possible. We may not conduct the session after 14:00 if there are no participants.)
Visits (tours) to the lab are also possible. The available time slots are as follows:
- Location: ICN Lab., IST Building 11th floor
- Date and Time: Students will definitely be available during the following hours.
(Refrain from visiting before the end of the experiment; School of Engineering Timetable)- Oct 16 (Thu) 16:30-, after the end of the experiment
- Oct 22 (Wed) 16:30-, after the end of the experiment
- Oct 23 (Thu) 16:30-, after the end of the experiment
If the above times are not suitable, please contact (or visit) us directly.
Hokuyukai Alma Mater Networking Event 2025
Mr. Yuito Ishisaki made a poster presentation entitled “A Measurement of Packet Delivery Rate and Signal Strength in LoRa Communication in Urban and Suburban Areas of Sapporo” at Hokuyukai Alma Mater Networking Event (in Japanese).
Introduction of Media Network Course for Freshmen (Sep. 2025)
On Tuesday, September 30th, an introductory session for freshmen was held. Students from our research laboratory also participated as representatives of the Media Network Course. We provided an overview of the course, explained the research laboratory through panel presentations, and demonstrated equipment to the freshmen.
Here shows contents of demonstration exhibit.
- Real-time display of flight data using Raspberry Pi and software wireless device (aircraft position tracking)
- Real-time audio feature visualization system based on FPGA and Raspberry Pi
- Chapit, a voice recognition robot from Raytron
IEEE R10 Humanitarian Technology Conference (HTC) 2025
At the IEEE R10 HTC 2025, held at Chiba University of Commerce from September 29 to October 1, Mr. Ishisaki delivered the following presentations.
- Yuito Ishisaki, Kyotaro Kunii, Hiroshi Tsutsui, Takeo Ohgane, “A Measurement of Packet Delivery Rate and Signal Strength in LoRa Communication in Urban and Suburban Areas of Sapporo,” Proceedings of IEEE R10 Humanitarian Technology Conference (IEEE R10 HTC), Sep. 2025.
The Institute of Electronics, Information and Communication Engineers Society Conference 2025
On Spetember 8, D1 student Chenyu Zhao presented the following paper at the 2025 Society Conference held at Okayama University Tsushima campus.
- Chenyu Zhao, Yuzuki Morikawa, Hiroshi Tsutsui, Takeo Ohgane, “Design of a Streaming-Based Resource-Efficient Mel Filter Bank Architecture for Real-Time Mel Spectrum Extraction on FPGA,” IEICE Society Conference, p. 118, A-14-15, Sep. 2025.
Temporary suspension of services due to planned power outage (Sep 13 – 16, 2025)
A planned power outage will be conducted at Hokkaido University’s Sapporo Campus on Sunday, September 14th, from 8:00 AM to 6:00 PM. As a result, all lab services will be suspended
from 1:00 PM on Saturday, September 13th, until 10:00 AM on Tuesday, September 16th.
The service suspension period may vary, and some services might be running slightly, or they might not be running at all.
2025 International Symposium on Multimedia and Communications (ISMAC 2025)
At the 2025 International Symposium on Multimedia and Communications (ISMAC 2025), held on Panglao Island from August 20 to 22, Mr. Zhao and Ms. Sakaki delivered the following two presentations.
- Chenyu Zhao, Hiroshi Tsutsui, Takeo Ohgane, “Design and Implementation of a Real-Time Acoustic Feature Visualization System on Raspberry Pi Platform Utilizing Fixed-Point FPGA-Based Mel Spectrum Extraction,” Proceedings of International Symposium on Multimedia and Communication Technology (ISMAC), Aug. 2025.
- Haruka Sakaki, Kenshiro Tanaka, Chenyu Zhao, Hiroshi Tsutsui, Takeo Ohgane, “Comparative Evaluation of CNN, VGG16, Conformer, and YAMNet Models for Skateboard Riding Sound Detection,” Proceedings of International Symposium on Multimedia and Communication Technology (ISMAC), Aug. 2025.
