History †
2015 †
December 25, 2015
HTS version 2.3 was released.
Its new features are
- HERest:
- HMGenS:
- Add DAEM-based parameter generation.
- Support DP search to determine state duration when the model alignments are given.
- HInit, HRest, HRest:
- HHEd:
- Speed up context-clustering by calculating differences between answers to current and previous questions.
- Add untying weights function in HHEd.
- Demo scripts:
- Add modulation spectrum-based postfilter.
- Support text files instead of utt files for general English database.
- Turn off spectrum normalization in STRAIGHT.
- Add LSP postfilter.
- Support mel-cepstrum based aperiodic measure generated by STRAIGHT.
- Support new HTS voice format for hts engine API.
- Integrate normal demo and STRAIGHT demo.
2014 †
December 25, 2014
HTS version 2.3 beta was released to the hts-users ML members.
2013 †
May 1, 2013
A tutorial about HMM-based speech synthesis was published on Proceedings of the IEEE: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6495700
2012 †
December 25, 2012
HTS version 2.3 alpha was released to the hts-users ML members.
2011 †
July 7, 2011
HTS version 2.2 was released.
Its new features are
- HERest:
- Support DAEM algorithm in parameter estimation step.
- HHEd:
- Support KLD-based state-mapping and cross-lingual speaker adaptation.
- Context-clustering can be started in the middle of the tree building.
- HMgeTool:
- Add ECD-based MGE traning command, HMgeTool.
- HSMMAlign:
- Add stand-alone HSMM based forced-alignment command, HSMMAlign.
- Demo scripts:
- Change sampling frequency from 16kHz to 48kHz.
- Support bark critical-band based aperiodic measure.
- Change speaker and singer of Brazilian Portuguese and Japanese song demo, respectively.
- Slides:
- Release slides as a tutorial of HMM-based speech synthesis.
March 3, 2011
HTS version 2.2 beta was released to the hts-users ML members.
2010 †
December 25, 2010
HTS version 2.2 alpha was released to the hts-users ML members.
May 14, 2010
HTS version 2.1.1 was was released.
Its new features are
- Based on HTK-3.4.1
- Many bug fixes
- HFst:
- WFST converter for forced-alignment of HSMM
- HMGenS:
- Initial GV weight for parameter generation
- Model-level alignments given from label of singing voice to determine note-level durations
- HHEd:
- Memory reduction options for context-clustering
- Demo scripts
- Context-dependent GV without silent and pause phoneme
- Demo using the Nitech Japanese database for singing voice synthesis
2009 †
December 25, 2009
HTS version 2.1.1 beta was released to the hts-users ML members.
August 27, 2009
The first HTS meeting in Interspeech 2009.
May 22, 2009
HTS-Demo for Brazilian Portuguese is released.
March 16, 2009
Prof. Keiichi Tokuda & Dr. Heiga Zen have a tutorial about HMM-based speech synthesis at Interspeech 2009.
2008 †
July 31, 2008
hts_engine website moved to http://hts-engine.sourceforge.net/
hts_engine API version 1.01 and Flite+hts_engine version 0.90 were released.
July 14, 2008
Keiichiro Oura took over the maintainer of HTS from Heiga Zen.
June 27, 2008
HTS version 2.1 and hts_engine API version 1.0 were released.
Their new features are
- HTS-2.1
- hts_engine API-1.0:
- Released under the New and Simplified BSD license
- Support LSP-type parameters including LSP, mel-LSP, and MGC-LSP
- Speech parameter generation algorithm considering GV
June 13, 2008
HTS version 2.1RC2 and hts_engine API version 0.99 were released to the hts-users ML members.
May 27, 2008
HTS voice building tools for the MARY platform was released with DFKI MARY 3.6.0.
March 24, 2008
HTS version 2.1RC1 and hts_engine API version 0.96 were released to the hts-users ML members.
January 15, 2008
HTS version 2.1beta and hts_engine_API version 0.95 were released to the hts-users ML members.
2007 †
December 7, 2007
hts_engine was ported to Java and included in DFKI MARY 3.5.
November 1, 2007
HTS version 2.1alpha was released to the hts-users ML members
October 1, 2007
HTS version 2.0.1 and hts_engine_API version 0.9 were 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.
- Demo scripts support LSP-type parameters for spectral representation in addition to cepstral ones.
- 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 †
December 29, 2006
HTS version 2.0 was finally released :-)
The new features are
December 4, 2006
HTS version 2.0RC3 was released to members of Mailing List.
July 1, 2006
HTS version 2.0RC2 was released to members of Mailing List.
March 3, 2006
HTS version 2.0RC1 was released to members of Mailing List.
February 15, 2006
HTS version 2.0RC0 was released to the internal working group.
2003 †
December 26, 2003
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, 2003
New HTS voices trained by ARCTIC databases were released.
June 11, 2003
HTS version 1.1b was released.
May 9, 2003
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, 2003
Minor revision was made to HTS version 1.0.
2002 †
December 25, 2002
HTS version 1.0 was released.
1995 †
May 9, 1995
The first paper about the speech parameter generation algorithm was appeared in ICASSP'95.
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