Akisato Kimura

Universal Source Coding Over Generalized Complementary Delivery Networks

This paper deals with a universal coding problem for a certain kind of multiterminal source coding network called a generalized complementary delivery network. In this network, messages from multiple correlated sources are jointly encoded, and each decoder has access to some of the messages to enable it to reproduce the other messages. Both fixed-to-fixed length and fixed-to-variable length lossless coding schemes are considered. Explicit constructions of universal codes and the bounds of the error probabilities are clarified by using methods of types and graph-theoretical analysis.

Universal coding for correlated sources with complementary delivery

This report deals with a universal coding problem for a certain kind of multiterminal source coding system that we call the complementary delivery coding system. Both fixed-to- fixed length and fixed-to-variable length lossless coding schemes are considered. Explicit constructions of universal codes and the bounds of the error probabilities are clarified via type-theoretical and graph-theoretical analyses.

Universal source coding for multiple decoders with side information

A multiterminal lossy source coding problem, which includes various problems such as the Wyner-Ziv problem and the complementary delivery problem as special cases, is considered. It is shown that any point in the achievable rate-distortion region can be attained even if the source statistics are not known.

Universal coding for lossy complementary delivery problem

This paper deals with a universal lossy coding problem for a certain kind of multiterminal source coding network called a complementary delivery system. A universal coding scheme based on Wyner-Ziv codes is proposed. While the proposed scheme cannot attain the optimal rate-distortion trade off in general, the rate-loss is upper bounded by a universal constant under some mild conditions. Moreover, the proposed scheme allows us to apply (non-universal) Wyner-Ziv codes to construct a universal lossy complementary delivery code.