Speaker adaptation via VQ prototype modification
Dimitry Rtischev, D. Nahamoo, Michael Picheny · IEEE Transactions on Speech and Audio Processing · 1994
A statistical technique for vector quantizer (VQ) prototype adaptation, based on tied-mixture continuous-parameter HMM's, is derived and evaluated on the basis of experimental evidence. Performance on difficult adaptation tasks indicates that VQ-prototype adaptation via tied-mixture HMM's constitutes a useful mechanism for speaker adaptation, particularly when there are substantial channel differences or when there is a large mismatch between reference and target speaker characteristics.