The basic core system of HTS version 2.3 is released as a patch code to HTK version 3.4.1. The patch code is released under the Modified BSD license. However, it should be noted that once you apply the patch to the HTK source code, you must obey the license of HTK. Using and distributing this software in the form of patch code to HTK and its documentation is free (without restriction including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of this work, and to permit persons to whom this work is furnished to do so) subject to the conditions in the following license:
/* ----------------------------------------------------------------- */ /* The HMM-Based Speech Synthesis System (HTS) */ /* developed by HTS Working Group */ /* http://hts.sp.nitech.ac.jp/ */ /* ----------------------------------------------------------------- */ /* */ /* Copyright (c) 2001-2015 Nagoya Institute of Technology */ /* Department of Computer Science */ /* */ /* 2001-2008 Tokyo Institute of Technology */ /* Interdisciplinary Graduate School of */ /* Science and Engineering */ /* */ /* All rights reserved. */ /* */ /* Redistribution and use in source and binary forms, with or */ /* without modification, are permitted provided that the following */ /* conditions are met: */ /* */ /* - Redistributions of source code must retain the above copyright */ /* notice, this list of conditions and the following disclaimer. */ /* - Redistributions in binary form must reproduce the above */ /* copyright notice, this list of conditions and the following */ /* disclaimer in the documentation and/or other materials provided */ /* with the distribution. */ /* - Neither the name of the HTS working group nor the names of its */ /* contributors may be used to endorse or promote products derived */ /* from this software without specific prior written permission. */ /* */ /* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND */ /* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, */ /* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ /* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */ /* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS */ /* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, */ /* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED */ /* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */ /* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */ /* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, */ /* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY */ /* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE */ /* POSSIBILITY OF SUCH DAMAGE. */ /* ----------------------------------------------------------------- */
Although the patch code is free, we still offer no warranties and no maintenance. We will continue to endeavor to fix bugs and answer queries when can, but are not in a position to guarantee it. We will consider consultancy if desired, please contacts us for details.
If you are using HTS in commercial environment, even though no license is required, we would be grateful if you let us know as it helps justify ourselves to our various sponsors. We also strongly encourage you to
- refer to the use of HTS in any publications that use HTS
- report bugs, where possible with bug fixes, that are found
It should be also noted that the license of HTS will not necessarily be the same as the license of database, scripts, or slides.