* [[Acknowledgements]] [#v999b499] The following people and related organizations have contributed to the development of HTS in various ways. It is their work that makes it all possible. In no special order: - ''Keiichi Tokuda''~ Overall concept and design. - ''Heiga Zen''~ Throwing away all old codes of HTS and rewriting them as HTS version 1.0, 1.1, 1.1b, 1.1.1, and 2.0. Current maintainer of HTS. - ''Junichi Yamagishi''~ Testing out various clustering and adaptation algorithms. - ''Takayoshi Yoshimura''~ Development of the first version of HTS. - ''Masatsune Tamura''~ Implementation of various speaker adaptation algorithms for HMM-based speech synthesis. - ''Shinji Sako''~ Applying HMM-based speech synthesis to audio-visual speech. - ''Noboru Miyazaki''~ Implementation of the first version of MSD-HMM trainer for pitch pattern modeling. - ''Tetsuya Yamada''~ Testing out various HMM training algorithms for HMM-based speech synthesis. - ''Takashi Masuko''~ Discussions in detail and implementing speech parameter generation algorithms. - ''Takao Kobayashi''~ Discussions and supervising students working on speech synthesis. - ''Tadashi Kitamura''~ Discussions and supervising students working on speech synthesis. - ''Satoshi Imai''~ Supervising students working on speech synthesis. - ''Alan Black''~ Discussions about all aspects of speech synthesis, helping us to use Festival, and supplying speech databases. - ''Tomoki Toda''~ Discussions and implemantation of GV-based parameter generation algorithms. - ''Takashi Nose''~ Testing out the version 2.0. - ''Steve Young, Phil Woodland, Mark Gales, and Other HTK developers''~ Development of HTK. and many other important contributors (we had to leave them out since they are too many).