Hiroki OKA


A Failsoft Scheme for Mobile Live Streaming by Scalable Video Coding
Hiroki OKADA Masato YOSHIMI Celimuge WU Tsutomu YOSHINAGA 
Publication:   
Publication Date: 2021/12/01
Vol. E104-D  No. 12  pp. 2121-2130
Type of Manuscript:  Special Section PAPER (Special Section on Parallel, Distributed, and Reconfigurable Computing, and Networking)
Category: 
Keyword: 
live video streamingmobile cooperative cachingpeak avoidancetraffic reductionD2Dscalable video coding
 Summary | Full Text:PDF

A Compact Digital Signature Scheme Based on the Module-LWR Problem
Hiroki OKADA Atsushi TAKAYASU Kazuhide FUKUSHIMA Shinsaku KIYOMOTO Tsuyoshi TAKAGI 
Publication:   
Publication Date: 2021/09/01
Vol. E104-A  No. 9  pp. 1219-1234
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Cryptography and Information Security
Keyword: 
lattice cryptographydigital signatureslearning with rounding
 Summary | Full Text:PDF | (Errata[Uploaded on February 1,2022])

Faster Rotation-Based Gauss Sieve for Solving the SVP on General Ideal Lattices
Shintaro NARISADA Hiroki OKADA Kazuhide FUKUSHIMA Shinsaku KIYOMOTO 
Publication:   
Publication Date: 2021/01/01
Vol. E104-A  No. 1  pp. 79-88
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
shortest vector problemGauss Sieveideal latticegeneralization
 Summary | Full Text:PDF

On the Complexity of the LWR-Solving BKW Algorithm
Hiroki OKADA Atsushi TAKAYASU Kazuhide FUKUSHIMA Shinsaku KIYOMOTO Tsuyoshi TAKAGI 
Publication:   
Publication Date: 2020/01/01
Vol. E103-A  No. 1  pp. 173-182
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
latticelearning with errorslearning with roundingBlum-Kalai-Wasserman algorithm
 Summary | Full Text:PDF

A Method to Derive SSO Design Rule Considering Jitter Constraint
Koutaro HACHIYA Hiroyuki KOBAYASHI Takaaki OKUMURA Takashi SATO Hiroki OKA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/04/01
Vol. E89-A  No. 4  pp. 865-872
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
simultaneous switching outputsimultaneous switching noisejitterASIC
 Summary | Full Text:PDF

Small Planar Packaging System Combined with Card-On-Board Packaging for High-Speed, High-Density Switching Systems
Tohru KISHIMOTO Keiichi YASUNA Hiroki OKA Katsumi KAIZU Sinichi SASAKI Yasuo KANEKO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/10/25
Vol. E81-B  No. 10  pp. 1894-1902
Type of Manuscript:  PAPER
Category: Communication Systems and Transmission Equipment
Keyword: 
planar packagingcard-on-board packagingmultichip modulecoaxial ZIF connectorATM switching system
 Summary | Full Text:PDF

Evaluation of Board-to-board High-speed Signal transmission Limit in a Rack System
Nobuaki SUGIURA Hiroki OKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/04/25
Vol. E78-B  No. 4  pp. 591-596
Type of Manuscript:  PAPER
Category: Communication Systems and Transmission Equipment
Keyword: 
signal transmissionnoiseevaluationconnector
 Summary | Full Text:PDF

Suitable Conditions for Connections through the Plated Through Hole of Printed Circuit Boards
Hiroki OKA Nobuaki SUGIURA Kei-ichi YASUDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/03/25
Vol. E78-C  No. 3  pp. 304-310
Type of Manuscript:  PAPER
Category: Components
Keyword: 
plated through hole (PTH)printed circuit board (PCB)simulation analysis modelsignal reflection characteristicsPTH diameterPTH pitchhigh-speed connectors
 Summary | Full Text:PDF