* History [#af7558b8] #contents ** 2007 [#afa4796d] > ''October 1, 2007'' >> HTS version 2.0.1 and hts_engine_API version 0.9 was released.~ The new features are - Many bug fixes. - Band structure for linear transforms. - Stream-dependent variance flooring scales. - State duration model mmf structure is changed. In the previous versions we used a multi-variate Gaussian PDF to represent state duration PDFs of an HMM. However, from this version we use multi-stream structure. This is very important for the future HSMM support. Speaker-dependent demo supports LSP in addition to mcep. - API-style implementation of hts_engine. Old stand-alone hts_engine will be thrown away. > ''September 20, 2007'' >> HTS version 2.0.1RC1 was released to the hts-users ML members. > ''September 18, 2007'' >> HTS version 2.0.1RC1 was released to the internal working group members. > ''March 20, 2007'' >> Mail address of hts-users ML changed to hts-users@sp.nitech.ac.jp > ''March 7, 2007'' >> HTS website moved to http://hts.sp.nitech.ac.jp/ ** 2006 [#z5d7dda6] >''December 29:'' >> HTS version 2.0 was '''finally''' released :-)~ The new features are - Based on [[HTK-3.4>http://htk.eng.cam.ac.uk/download.shtml]]. - Compilation without [[SPTK>http://www.sp.nitech.ac.jp/~tokuda/SPTK/index.html]]. - The [[license of HTS>License]] was slightly modified. - Support gcc4. - Thousands of fixed bugs. - HRest can generate state duration densities (-g option). - Model boundaries can be given to HERest (-e option).~ We may specify a part of model boundaries (e.g, pause positions). - Reduced-memory implementation of context clustering in HHEd (-r option). - Each decision tree can have a name with regular expression (-p option).~ TB 000 {(*-a+*, *-i+*, *-u+*).state[2]} TB 000 {(*-sil+*, *-pau+*).state[3]} As a result, different two trees can be constructed for consonants and vowels, respectively. - The interface of HMGenS has been switched from ''HHEd-style'' to ''HERest-style''. - Flexible model structures in HMGenS (in the previous version, the first stream is assumed as mcep, and the others are assumed as log F0). Non-left-to-right models and full covariance matrices for state output pdfs can also be used. - EM-based parameter generation algorithm (-c option), i.e, mixture of Gaussians can be used. -- -c 0: Cholesky decomposition -- -c 1: EM (with fixed state sequence) -- -c 2: EM (phone boundaries can be given with -e option) - Random generation algorithm is also supported (set config. variable RNDPG = TRUE). - Speaker adaptation, adaptive training, and semi-tied covariance transforms are supported for multi-stream HMMs/MSD-HMMs. -- MLLRMEAN, MLLRCOV, and CMLLR-based adaptation. -- CMLLR-based adaptive training. -- Decision trees for context clustering can be used to define regression classes for adaptation. -- HMGenS can read MLLRMEAN, MLLRCOV, CMLLR, and SEMIT transforms for adaptation. - MAP adaptation is also supported. - Performance improvements in hts_engine. - Miscellaneous changes. >''December 4:'' >> HTS version 2.0RC3 was released to members of Mailing List. >''July 1:'' >> HTS version 2.0RC2 was released to members of Mailing List. >''March 3:'' >> HTS version 2.0RC1 was released to members of Mailing List. >''February 15:'' >> HTS version 2.0RC0 was released to the internal working group. ** 2003 [#ld26312a] >''December 26:'' >> HTS version 1.1.1 was released. The new features were - Based on HTK-3.2.1 - Demo script for ARCTIC database - Demo script for an original database (Japanese) - Variance flooring in demo script - Postfiltering in hts-engine - Many fixed bugs >''Oct. 14:'' >> New HTS voices trained by ARCTIC databases were released. >''June 11:'' >> HTS version 1.1b was released. >''May 9:'' >> HTS version 1.1 was released. The new features were - A small synthesis engine (to be called from Festival). - HMM file format converter for the engine. - Many fixed bugs (Thanks for reporting them). - Accompanied by HTS voices for Festival. >''January 21:'' >> Minor revision was made to HTS version 1.0. ** 2002 [#s0e2a8a8] >''December 25:'' >> HTS version 1.0 was released. //>''September:'' //>> The first paper about eigenvoice for HMM-based speech synthesis was //appeared in ICSLP'02. // //** 1999 [#v67c04e5] //> ''September:'' //>> The first paper about the current HTS framework was appeared in //Eurospeech'99. //> ''March:'' //>> The first paper about MSD-HMM was appeared in ICASSP'99. // //** 1998 [#v760e959] //> ''November:'' //>> The first paper about speaker adaptation for the HMM-based speech synthesis //using MLLR was appeared in ESCA/COCOSDA workshop on speech synthesis. // //** 1997 [#v95967aa] //> ''September:'' //>> The first paper about speaker interpolation for the HMM-based speech //synthesis was appeared in Eurospeech'97. // ** 1995 [#v5285cba] > ''May:'' >> The first paper about the speech parameter generation algorithm was appeared in ICASSP'95.