Ken-ichi Iwata

72 papers B 28C 9Journal 31Unranked 4

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	Asymmetric Encoding-Decoding Schemes for Lossless Data Compression. CoRR Hirosuke Yamamoto, Ken-ichi Iwata
2025	B	`conf`	A Lower Bound of Worst-Case Redundancy of $k$-Symbol Delay Decodable Codes. ISIT Kengo Hashimoto, Ken-ichi Iwata
2025	B	`conf`	Extensions of Asymmetric Binary Systems and Rayleigh's Theorem. ISIT Ken-ichi Iwata, Kengo Hashimoto, Hirosuke Yamamoto
2025	J	`jnl`	Optimal Codes in the Class of 2-Bit Delay Decodable Codes. IEEE Trans. Inf. Theory Kengo Hashimoto, Ken-ichi Iwata
2025	J	`jnl`	Properties of Optimal IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Kengo Hashimoto, Ken-ichi Iwata
2024	B	`conf`	AIFV Codes Allowing 2-bit Decoding Delays for Unequal Bit Cost. ISIT Ken-ichi Iwata, Kengo Hashimoto, Takahiro Wakayama, Hirosuke Yamamoto
2024	B	`conf`	An Asymmetric Encoding - Decoding Scheme for Lossless Data Compression. ISIT Hirosuke Yamamoto, Ken-ichi Iwata
2024	C	`conf`	Asymptotic Optimality of the Asymmetric Encoding-Decoding Scheme. ISITA Hirosuke Yamamoto, Ken-ichi Iwata
2024	J	`jnl`	Encoding and Decoding Algorithms of ANS Variants and Evaluation of Their Average Code Lengths. CoRR Hirosuke Yamamoto, Ken-ichi Iwata
2024	J	`jnl`	Properties of IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Kengo Hashimoto, Ken-ichi Iwata
2024	J	`jnl`	Reduction of Sufficient Number of Code Tables of CoRR Kengo Hashimoto, Ken-ichi Iwata
2023	J	`jnl`	Properties of k-bit Delay Decodable Codes. CoRR Kengo Hashimoto, Ken-ichi Iwata
2023	J	`jnl`	The Optimality of AIFV Codes in the Class of 2-bit Delay Decodable Codes. CoRR Kengo Hashimoto, Ken-ichi Iwata
2022	C	`conf`	Enumeration and Coding of Binary AIFV-m Code Trees. ISITA Genta Onishi, Kengo Hashimoto, Ken-ichi Iwata, Hirosuke Yamamoto
2022	J	`jnl`	Foreword. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Ken-ichi Iwata, Hiroshi Kamabe
2022	B	`conf`	Joint Coding for Discrete Sources and Finite-State Noiseless Channels. ISIT Ken-ichi Iwata, Hirosuke Yamamoto
2022	J	`jnl`	Optimality of Huffman Code in the Class of 1-Bit Delay Decodable Codes. IEEE J. Sel. Areas Inf. Theory Kengo Hashimoto, Ken-ichi Iwata
2022	J	`jnl`	Optimality of Huffman Code in the Class of 1-bit Delay Decodable Codes. CoRR Kengo Hashimoto, Ken-ichi Iwata
2021	B	`conf`	AIVF Codes Based on Iterative Algorithm and Dynamic Programming. ISIT Ken-ichi Iwata, Hirosuke Yamamoto
2021	B	`conf`	On the Optimality of Binary AIFV Codes with Two Code Trees. ISIT Kengo Hashimoto, Ken-ichi Iwata
2020	B	`conf`	A Universal Data Compression Scheme based on the AIVF Coding Techniques. ISIT Hirosuke Yamamoto, Koki Imaeda, Kengo Hashimoto, Ken-ichi Iwata
2020	B	`conf`	An Algorithm for Constructing the Optimal Code Trees for Binary Alphabetic AIFV-m Codes. ITW Ken-ichi Iwata, Hirosuke Yamamoto
2020	J	`jnl`	Modular Arithmetic Erasure Channels and Their Multilevel Channel Polarization. IEEE Trans. Inf. Theory Yuta Sakai, Ken-ichi Iwata, Hiroshi Fujisaki
2020	B	`conf`	On a Redundancy of AIFV-m Codes for m =3, 5. ISIT Ryusei Fujita, Ken-ichi Iwata, Hirosuke Yamamoto
2019	B	`conf`	An Iterative Algorithm to Optimize the Average Performance of Markov Chains with Finite States. ISIT Ryusei Fujita, Ken-ichi Iwata, Hirosuke Yamamoto
2019	B	`conf`	Countably Infinite Multilevel Source Polarization for Non-Stationary Erasure Distributions. ISIT Yuta Sakai, Ken-ichi Iwata, Hiroshi Fujisaki
2019	J	`jnl`	Countably Infinite Multilevel Source Polarization for Non-Stationary Erasure Distributions. CoRR Yuta Sakai, Ken-ichi Iwata, Hiroshi Fujisaki
2019	B	`conf`	Enumeration and Coding of Compact Code Trees for Binary AIFV Codes. ISIT Kengo Hashimoto, Ken-ichi Iwata, Hirosuke Yamamoto
2018	B	`conf`	An Optimality Proof of the Iterative Algorithm for AIFV-m Codes. ISIT Ryusei Fujita, Ken-ichi Iwata, Hirosuke Yamamoto
2018	B	`conf`	Asymptotic Distribution of Multilevel Channel Polarization for a Certain Class of Erasure Channels. ISIT Yuta Sakai, Ken-ichi Iwata, Hiroshi Fujisaki
2018	J	`jnl`	Asymptotic Distribution of Multilevel Channel Polarization for a Certain Class of Erasure Channels. CoRR Yuta Sakai, Ken-ichi Iwata, Hiroshi Fujisaki
2018	B	`conf`	Dynamic Programming Approach of Optimal Upgradation Algorithm for an Auxiliary Random Variable of a Bernoulli Random Variable. ISIT Yuta Sakai, Ken-ichi Iwata
2018	J	`jnl`	Extremality Between Symmetric Capacity and Gallager's Reliability Function E IEEE Trans. Inf. Theory Yuta Sakai, Ken-ichi Iwata
2018	J	`jnl`	Modular Arithmetic Erasure Channels and Their Multilevel Channel Polarization. CoRR Yuta Sakai, Ken-ichi Iwata, Hiroshi Fujisaki
2017	B	`conf`	An iterative algorithm to construct optimal binary AIFV-m codes. ITW Hirosuke Yamamoto, Ken-ichi Iwata
2017	B	`conf`	Optimal quantization of B-DMCs maximizing α-mutual information with monge property. ISIT Yuta Sakai, Ken-ichi Iwata
2017	J	`jnl`	Proceedings of Workshop AEW10: Concepts in Information Theory and Communications. CoRR Kees A. Schouhamer Immink, Stan Baggen, Ferdaous Chaabane, Yanling Chen, Peter H. N. de With, Héla Gassara, Hamed Gharbi, Adel Ghazel, Khaled Grati, Naira M. Grigoryan, Ashot N. Harutyunyan, Masayuki Imanishi, Mitsugu Iwamoto, Ken-ichi Iwata, Hiroshi Kamabe, Brian M. Kurkoski, Shigeaki Kuzuoka, Patrick Langenhuizen, Jan Lewandowsky, Akiko Manada, Shigeki Miyake, Hiroyoshi Morita, Jun Muramatsu, Safa Najjar, Arnak V. Poghosyan, Fatma Rouissi, Yuta Sakai, Ulrich Tamm, Joost van der Putten, Fons van der Sommen, A. J. Han Vinck, Tadashi Wadayama, Dirk Wübben, Hirosuke Yamamoto
2017	J	`jnl`	Sharp Bounds on Arimoto's Conditional Rényi Entropies Between Two Distinct Orders. CoRR Yuta Sakai, Ken-ichi Iwata
2017	B	`conf`	Sharp bounds on Arimoto's conditional Rényi entropies between two distinct orders. ISIT Yuta Sakai, Ken-ichi Iwata
2016	J	`jnl`	A Generalized Erasure Channel in the Sense of Polarization for Binary Erasure Channels. CoRR Yuta Sakai, Ken-ichi Iwata
2016	C	`conf`	A dynamic programming algorithm to construct optimal code trees of AIFV codes. ISITA Ken-ichi Iwata, Hirosuke Yamamoto
2016	B	`conf`	A generalized erasure channel in the sense of polarization for binary erasure channels. ITW Yuta Sakai, Ken-ichi Iwata
2016	J	`jnl`	Extremal Relations Between Shannon Entropy and ℓ CoRR Yuta Sakai, Ken-ichi Iwata
2016	C	`conf`	Extremal relations between shannon entropy and ℓα-norm. ISITA Yuta Sakai, Ken-ichi Iwata
2016	J	`jnl`	Lossless Data Compression via Substring Enumeration for IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Ken-ichi Iwata, Mitsuharu Arimura
2016	J	`jnl`	Relations Between Conditional Shannon Entropy and Expectation of ℓ CoRR Yuta Sakai, Ken-ichi Iwata
2016	B	`conf`	Relations between conditional Shannon entropy and expectation of ℓα-norm. ISIT Yuta Sakai, Ken-ichi Iwata
2016	J	`jnl`	Sharp Bounds Between Two Rényi Entropies of Distinct Positive Orders. CoRR Yuta Sakai, Ken-ichi Iwata
2015	B	`conf`	Feasible regions of symmetric capacity and Gallager's E0 function for ternary-input discrete memoryless channels. ISIT Yuta Sakai, Ken-ichi Iwata
2015	B	`conf`	Lossless Data Compression via Substring Enumeration for k-th Order Markov Sources with a Finite Alphabet. DCC Ken-ichi Iwata, Mitsuharu Arimura
2014	J	`jnl`	Evaluation of Maximum Redundancy of Data Compression via Substring Enumeration for IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Ken-ichi Iwata, Mitsuharu Arimura, Yuki Shima
2014	B	`conf`	Quantizer design for outputs of binary-input discrete memoryless channels using SMAWK algorithm. ISIT Ken-ichi Iwata, Shin-ya Ozawa
2014	C	`conf`	Suboptimal quantizer design for outputs of discrete memoryless channels with a finite-input alphabet. ISITA Yuta Sakai, Ken-ichi Iwata
2013	J	`jnl`	A Characterization of Optimal FF Coding Rate Using a New Optimistically Optimal Code. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Mitsuharu Arimura, Hiroki Koga, Ken-ichi Iwata
2013	J	`jnl`	Redundancy-Optimal FF Codes for a General Source and Its Relationships to the Rate-Optimal FF Codes. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Mitsuharu Arimura, Hiroki Koga, Ken-ichi Iwata
2012	C	`conf`	On the maximum redundancy of CSE for I.I.D. sources. ISITA Ken-ichi Iwata, Mitsuharu Arimura, Yuki Shima
2012	C	`conf`	On variable-to-fixed length coding of a general source with infinite alphabet. ISITA Mitsuharu Arimura, Ken-ichi Iwata
2011	—	`conf`	An Improvement in Lossless Data Compression via Substring Enumeration. ACIS-ICIS Ken-ichi Iwata, Mitsuharu Arimura, Yuki Shima
2011	B	`conf`	Coding theorems on the worst-case redundancy of fixed-length coding for a general source. ISIT Hiroki Koga, Mitsuharu Arimura, Ken-ichi Iwata
2010	C	`conf`	A prefix-free coding for finite-state noiseless channels with small coding delay. ISITA Ken-ichi Iwata, Takuya Koyama
2010	—	`conf`	An Effective Optimization of Reference Pixel Arrangement in the Lossless Coding for HDTV image. ACIS-ICIS Yuya Yamaguchi, Takashi Otsuki, Ken-ichi Iwata, Shuichi Itoh
2010	B	`conf`	On the achievable redundancy rate of fixed length source code for general sources. ISIT Mitsuharu Arimura, Ken-ichi Iwata
2010	C	`conf`	The minimum achievable redundancy rate of fixed-to-fixed length source codes for general sources. ISITA Mitsuharu Arimura, Ken-ichi Iwata
2006	J	`jnl`	L IEEE Trans. Signal Process. Takao Hinamoto, Ken-ichi Iwata, Wu-Sheng Lu
2006	J	`jnl`	Optimal Synthesis of a Class of 2-D Digital Filters with Minimum IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Takao Hinamoto, Ken-ichi Iwata, Osemekhian I. Omoifo, Shuichi Ohno, Wu-Sheng Lu
2005	B	`conf`	A New Approach of DCA by using BWT. DCC Bo Zhao, Ken-ichi Iwata, Shuichi Itoh, Toshihiko Kato
2005	J	`jnl`	Information-Spectrum Characterization of Broadcast Channel with General Source. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Ken-ichi Iwata, Yasutada Oohama
2005	J	`jnl`	Information-Spectrum Characterization of Multiple-Access Channels with Correlated Sources. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Ken-ichi Iwata, Yasutada Oohama
2005	—	`conf`	Minimization of L ISCAS (3) Takao Hinamoto, Ken-ichi Iwata, Wu-Sheng Lu
2005	B	`conf`	On multiple-access communication system for general correlated sources with an array of general independent channels. ISIT Ken-ichi Iwata
2005	—	`conf`	State-space digital filters with minimum L ICASSP (4) Takao Hinamoto, Ken-ichi Iwata, Wu-Sheng Lu
2002	J	`jnl`	An Information-Spectrum Approach to Rate-Distortion Function with Side Information. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Ken-ichi Iwata, Jun Muramatsu