An Information-Spectrum Approach to Rate-Distortion Function with Side Information. - Ken-ichi Iwata; Jun Muramatsu (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

A New Approach of DCA by using BWT. - Bo Zhao; Ken-ichi Iwata; Shuichi Itoh; Toshihiko Kato (DCC, 2005)

State-space digital filters with minimum L2-sensitivity subject to L2-scaling constraints. - Takao Hinamoto; Ken-ichi Iwata; Wu-Sheng Lu (ICASSP (4), 2005)

Minimization of L2-sensitivity for a class of 2D state-space digital filters subject to L2-scaling constraints. - Takao Hinamoto; Ken-ichi Iwata; Wu-Sheng Lu (ISCAS (3), 2005)

On multiple-access communication system for general correlated sources with an array of general independent channels. - Ken-ichi Iwata (ISIT, 2005)

Information-Spectrum Characterization of Broadcast Channel with General Source. - Ken-ichi Iwata; Yasutada Oohama (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

Information-Spectrum Characterization of Multiple-Access Channels with Correlated Sources. - Ken-ichi Iwata; Yasutada Oohama (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

Optimal Synthesis of a Class of 2-D Digital Filters with Minimum L2-Sensitivity and No Overflow Oscillations. - Takao Hinamoto; Ken-ichi Iwata; Osemekhian I. Omoifo; Shuichi Ohno; Wu-Sheng Lu (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

L2-sensitivity minimization of one- and two-dimensional state-space digital filters subject to L2-scaling constraints. - Takao Hinamoto; Ken-ichi Iwata; Wu-Sheng Lu (IEEE Trans. Signal Process., 2006)

An Effective Optimization of Reference Pixel Arrangement in the Lossless Coding for HDTV image. - Yuya Yamaguchi; Takashi Otsuki; Ken-ichi Iwata; Shuichi Itoh (ACIS-ICIS, 2010)

On the achievable redundancy rate of fixed length source code for general sources. - Mitsuharu Arimura; Ken-ichi Iwata (ISIT, 2010)

The minimum achievable redundancy rate of fixed-to-fixed length source codes for general sources. - Mitsuharu Arimura; Ken-ichi Iwata (ISITA, 2010)

A prefix-free coding for finite-state noiseless channels with small coding delay. - Ken-ichi Iwata; Takuya Koyama (ISITA, 2010)

An Improvement in Lossless Data Compression via Substring Enumeration. - Ken-ichi Iwata; Mitsuharu Arimura; Yuki Shima (ACIS-ICIS, 2011)

Coding theorems on the worst-case redundancy of fixed-length coding for a general source. - Hiroki Koga; Mitsuharu Arimura; Ken-ichi Iwata (ISIT, 2011)

On variable-to-fixed length coding of a general source with infinite alphabet. - Mitsuharu Arimura; Ken-ichi Iwata (ISITA, 2012)

On the maximum redundancy of CSE for I.I.D. sources. - Ken-ichi Iwata; Mitsuharu Arimura; Yuki Shima (ISITA, 2012)

Redundancy-Optimal FF Codes for a General Source and Its Relationships to the Rate-Optimal FF Codes. - Mitsuharu Arimura; Hiroki Koga; Ken-ichi Iwata (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

A Characterization of Optimal FF Coding Rate Using a New Optimistically Optimal Code. - Mitsuharu Arimura; Hiroki Koga; Ken-ichi Iwata (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Quantizer design for outputs of binary-input discrete memoryless channels using SMAWK algorithm. - Ken-ichi Iwata; Shin-ya Ozawa (ISIT, 2014)

Suboptimal quantizer design for outputs of discrete memoryless channels with a finite-input alphabet. - Yuta Sakai; Ken-ichi Iwata (ISITA, 2014)

Evaluation of Maximum Redundancy of Data Compression via Substring Enumeration for k-th Order Markov Sources. - Ken-ichi Iwata; Mitsuharu Arimura; Yuki Shima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

Lossless Data Compression via Substring Enumeration for k-th Order Markov Sources with a Finite Alphabet. - Ken-ichi Iwata; Mitsuharu Arimura (DCC, 2015)

Feasible regions of symmetric capacity and Gallager's E0 function for ternary-input discrete memoryless channels. - Yuta Sakai; Ken-ichi Iwata (ISIT, 2015)

Relations between conditional Shannon entropy and expectation of ℓα-norm. - Yuta Sakai; Ken-ichi Iwata (ISIT, 2016)

A dynamic programming algorithm to construct optimal code trees of AIFV codes. - Ken-ichi Iwata; Hirosuke Yamamoto (ISITA, 2016)

Extremal relations between shannon entropy and ℓα-norm. - Yuta Sakai; Ken-ichi Iwata (ISITA, 2016)

A generalized erasure channel in the sense of polarization for binary erasure channels. - Yuta Sakai; Ken-ichi Iwata (ITW, 2016)

Extremal Relations Between Shannon Entropy and ℓα-Norm. - Yuta Sakai; Ken-ichi Iwata (CoRR, 2016)

Relations Between Conditional Shannon Entropy and Expectation of ℓα-Norm. - Yuta Sakai; Ken-ichi Iwata (CoRR, 2016)

Sharp Bounds Between Two Rényi Entropies of Distinct Positive Orders. - Yuta Sakai; Ken-ichi Iwata (CoRR, 2016)

Lossless Data Compression via Substring Enumeration for k-th Order Markov Sources with a Finite Alphabet. - Ken-ichi Iwata; Mitsuharu Arimura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016)

Optimal quantization of B-DMCs maximizing α-mutual information with monge property. - Yuta Sakai; Ken-ichi Iwata (ISIT, 2017)

Sharp bounds on Arimoto's conditional Rényi entropies between two distinct orders. - Yuta Sakai; Ken-ichi Iwata (ISIT, 2017)

An iterative algorithm to construct optimal binary AIFV-m codes. - Hirosuke Yamamoto; Ken-ichi Iwata (ITW, 2017)

Proceedings of Workshop AEW10: Concepts in Information Theory and Communications. - Kees A. Schouhamer Immink; Stan Baggen; Ferdaous Chaabane; Yanling Chen 001; Peter H. N. de With; Héla Gassara; Hamed Gharbi; Adel Ghazel; Khaled Grati; Naira M. Grigoryan; Ashot N. Harutyunyan; Masayuki Imanishi; et al. (CoRR, 2017)

An Optimality Proof of the Iterative Algorithm for AIFV-m Codes. - Ryusei Fujita; Ken-ichi Iwata; Hirosuke Yamamoto (ISIT, 2018)

Dynamic Programming Approach of Optimal Upgradation Algorithm for an Auxiliary Random Variable of a Bernoulli Random Variable. - Yuta Sakai; Ken-ichi Iwata (ISIT, 2018)

Asymptotic Distribution of Multilevel Channel Polarization for a Certain Class of Erasure Channels. - Yuta Sakai; Ken-ichi Iwata; Hiroshi Fujisaki (ISIT, 2018)

Extremality Between Symmetric Capacity and Gallager's Reliability Function E0 for Ternary-Input Discrete Memoryless Channels. - Yuta Sakai; Ken-ichi Iwata (IEEE Trans. Inf. Theory, 2018)

An Iterative Algorithm to Optimize the Average Performance of Markov Chains with Finite States. - Ryusei Fujita; Ken-ichi Iwata; Hirosuke Yamamoto (ISIT, 2019)

Enumeration and Coding of Compact Code Trees for Binary AIFV Codes. - Kengo Hashimoto; Ken-ichi Iwata; Hirosuke Yamamoto (ISIT, 2019)

Countably Infinite Multilevel Source Polarization for Non-Stationary Erasure Distributions. - Yuta Sakai; Ken-ichi Iwata; Hiroshi Fujisaki (ISIT, 2019)

On a Redundancy of AIFV-m Codes for m =3, 5. - Ryusei Fujita; Ken-ichi Iwata; Hirosuke Yamamoto (ISIT, 2020)

A Universal Data Compression Scheme based on the AIVF Coding Techniques. - Hirosuke Yamamoto; Koki Imaeda; Kengo Hashimoto; Ken-ichi Iwata (ISIT, 2020)

An Algorithm for Constructing the Optimal Code Trees for Binary Alphabetic AIFV-m Codes. - Ken-ichi Iwata; Hirosuke Yamamoto (ITW, 2020)

Modular Arithmetic Erasure Channels and Their Multilevel Channel Polarization. - Yuta Sakai; Ken-ichi Iwata; Hiroshi Fujisaki (IEEE Trans. Inf. Theory, 2020)

On the Optimality of Binary AIFV Codes with Two Code Trees. - Kengo Hashimoto; Ken-ichi Iwata (ISIT, 2021)

AIVF Codes Based on Iterative Algorithm and Dynamic Programming. - Ken-ichi Iwata; Hirosuke Yamamoto (ISIT, 2021)

Joint Coding for Discrete Sources and Finite-State Noiseless Channels. - Ken-ichi Iwata; Hirosuke Yamamoto (ISIT, 2022)

Enumeration and Coding of Binary AIFV-m Code Trees. - Genta Onishi; Kengo Hashimoto; Ken-ichi Iwata; Hirosuke Yamamoto (ISITA, 2022)

Foreword. - Ken-ichi Iwata; Hiroshi Kamabe (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022)

Optimality of Huffman Code in the Class of 1-Bit Delay Decodable Codes. - Kengo Hashimoto; Ken-ichi Iwata (IEEE J. Sel. Areas Inf. Theory, 2022)

Properties of k-bit Delay Decodable Codes. - Kengo Hashimoto; Ken-ichi Iwata (CoRR, 2023)

The Optimality of AIFV Codes in the Class of 2-bit Delay Decodable Codes. - Kengo Hashimoto; Ken-ichi Iwata (CoRR, 2023)

AIFV Codes Allowing 2-bit Decoding Delays for Unequal Bit Cost. - Ken-ichi Iwata; Kengo Hashimoto; Takahiro Wakayama; Hirosuke Yamamoto (ISIT, 2024)

An Asymmetric Encoding - Decoding Scheme for Lossless Data Compression. - Hirosuke Yamamoto; Ken-ichi Iwata (ISIT, 2024)

Asymptotic Optimality of the Asymmetric Encoding-Decoding Scheme. - Hirosuke Yamamoto; Ken-ichi Iwata (ISITA, 2024)

Encoding and Decoding Algorithms of ANS Variants and Evaluation of Their Average Code Lengths. - Hirosuke Yamamoto; Ken-ichi Iwata (CoRR, 2024)

Reduction of Sufficient Number of Code Tables of k-Bit Delay Decodable Codes. - Kengo Hashimoto; Ken-ichi Iwata (CoRR, 2024)

Properties of k-Bit Delay Decodable Codes. - Kengo Hashimoto; Ken-ichi Iwata (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

Properties of Optimal k-Bit Delay Decodable Alphabetic Codes. - Kengo Hashimoto; Ken-ichi Iwata (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2025)

Optimal Codes in the Class of 2-Bit Delay Decodable Codes. - Kengo Hashimoto; Ken-ichi Iwata (IEEE Trans. Inf. Theory, 2025)