[hts-users:00897] Re: help in parameter generation algorithm

[Keiichi Tokuda <tokuda@xxxxxxxxxxxx>]

From: Mohammed Samir <msamirhb@xxxxxxxxx>
Subject: [hts-users:00896] help in parameter generation algorithm
Date: Wed, 31 Oct 2007 03:27:25 -0700 (PDT)
Message-ID: <515892.3197.qm@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

> In the paper of SPEECH PARAMETER GENERATION ALGORITHM
> FOR HMM-BASED SPEECH SYNTHESIS
> in equation number 6  
> it is written that "the logarithm of P(O|Q, model) can
> be written as"
> log P(O|Q,model)= -1/2 OT U-1 O + OT U-1 M + K 
> 
> first why we use the logarithm (is this for order and
> accracy)?

It is just to make the equation look simple.

> what is the mathematical rules used to achieve this
> assigment?(is it the infinie sieres (Maclarin) of the
> logarithm?)

There is no approximation here.

Keiichi Tokuda
tokuda@xxxxxxxxxxxx
http://www.sp.nitech.ac.jp/~tokuda/