>>304
話者適応は英語で Speaker Adaptation です。
HMM音声合成ツールキット HTS 2.0以降に
その機能があるのでソースを読めばわかると思います。

HMM-based Speech Synthesis System (HTS) - History
http://hts.sp.nitech.ac.jp/?History#z5d7dda6
>December 29, 2006
>　HTS version 2.0 was finally released :-)
>　The new features are
>　* 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.