Takeshi KUMAKI


Hierarchical-Masked Image Filtering for Privacy-Protection
Takeshi KUMAKI Takeshi FUJINO 
Publication:   
Publication Date: 2017/10/01
Vol. E100-D  No. 10  pp. 2327-2338
Type of Manuscript:  Special Section PAPER (Special Section on Security, Privacy and Anonymity in Computation, Communication and Storage Systems)
Category: Privacy, anonymity, and fundamental theory
Keyword: 
privacysurveillance cameramaskhierarchical operationcipher processingprototype system
 Summary | Full Text:PDF(4.4MB)

Development of Compression Tolerable and Highly Implementable Watermarking Method for Mobile Devices
Takeshi KUMAKI Kei NAKAO Kohei HOZUMI Takeshi OGURA Takeshi FUJINO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/03/01
Vol. E97-D  No. 3  pp. 593-596
Type of Manuscript:  LETTER
Category: Information Network
Keyword: 
watermarkmax-plus algebramorphological wavelet transformJPEGcompression tolerancemobile device
 Summary | Full Text:PDF(525.8KB)

Software-Based Parallel Cryptographic Solution with Massive-Parallel Memory-Embedded SIMD Matrix Architecture for Data-Storage Systems
Takeshi KUMAKI Tetsushi KOIDE Hans Jurgen MATTAUSCH Masaharu TAGAMI Masakatsu ISHIZAKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2011/09/01
Vol. E94-D  No. 9  pp. 1742-1754
Type of Manuscript:  PAPER
Category: Fundamentals of Information Systems
Keyword: 
matrix-processing architectureSIMDbit-serial and word-parallelCAMtable-lookup codingcryptographic algorithmAES
 Summary | Full Text:PDF(1.1MB)

Integration Architecture of Content Addressable Memory and Massive-Parallel Memory-Embedded SIMD Matrix for Versatile Multimedia Processor
Takeshi KUMAKI Masakatsu ISHIZAKI Tetsushi KOIDE Hans Jurgen MATTAUSCH Yasuto KURODA Takayuki GYOHTEN Hideyuki NODA Katsumi DOSAKA Kazutami ARIMOTO Kazunori SAITO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/09/01
Vol. E91-C  No. 9  pp. 1409-1418
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Processors Based on Novel Concepts in Computation)
Category: 
Keyword: 
content addressable memoryCAMmatrix-processing architectureSIMDbit-serial and word-paralleltable-lookup codingDCTHuffman codingJPEG
 Summary | Full Text:PDF(624KB)

Acceleration of DCT Processing with Massive-Parallel Memory-Embedded SIMD Matrix Processor
Takeshi KUMAKI Masakatsu ISHIZAKI Tetsushi KOIDE Hans Jurgen MATTAUSCH Yasuto KURODA Hideyuki NODA Katsumi DOSAKA Kazutami ARIMOTO Kazunori SAITO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2007/08/01
Vol. E90-D  No. 8  pp. 1312-1315
Type of Manuscript:  LETTER
Category: Image Processing and Video Processing
Keyword: 
DCTfast DCTmatrix-processing engineSIMDbit-serial and word-parallel
 Summary | Full Text:PDF(485KB)

Real-Time Huffman Encoder with Pipelined CAM-Based Data Path and Code-Word-Table Optimizer
Takeshi KUMAKI Yasuto KURODA Masakatsu ISHIZAKI Tetsushi KOIDE Hans Jurgen MATTAUSCH Hideyuki NODA Katsumi DOSAKA Kazutami ARIMOTO Kazunori SAITO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2007/01/01
Vol. E90-D  No. 1  pp. 334-345
Type of Manuscript:  PAPER
Category: Image Processing and Video Processing
Keyword: 
content addressable memoryCAMHuffman codingparallel processingpipelinecode word table
 Summary | Full Text:PDF(2.1MB)

Scalable FPGA/ASIC Implementation Architecture for Parallel Table-Lookup-Coding Using Multi-Ported Content Addressable Memory
Takeshi KUMAKI Yutaka KONO Masakatsu ISHIZAKI Tetsushi KOIDE Hans Jurgen MATTAUSCH 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2007/01/01
Vol. E90-D  No. 1  pp. 346-354
Type of Manuscript:  PAPER
Category: Image Processing and Video Processing
Keyword: 
multiportcontent addressable memoryCAMparallel processingSIMDcategorizationbit parallel block paralleltable-lookup-codingHuffman coding
 Summary | Full Text:PDF(1.6MB)