[hts-users:03326] Re: [hts-users:03323] Questions of the untied stage in the sd training.pl？

[王洋 <yangwang84@xxxxxxxxx>]

Hi, ArthurLeo,

   You asked about "{cluster, herest}, {untie, herest}, {recluster,
herest}". When we further untie, re-estimate, recluster and herest
HMMs, we usually get better re-estimation accuracy than just cluster,
herest. You may verify that the corresponding HMM definition files are
a little different. Through my informal listening test, I found the
synthesized speech is indeed a little better.

YangWang


2012/6/5 ArthurLeo <bin007.zhao@xxxxxxxxxxx>:
> Hi all，
>     When I read the SD training.pl(hts2.2 version)，I found that there is a
> untied stage, I want to know why do this stage？ why not use the before stage
> result cluster.mmf(after the herest) as the final model? why do the untied
> stage then clustered, next using herest result as the final model? what is
> the function of
> adding the untied stage? what is the benefit? Can someone give me  an
> answer? Thank you  in advance!