[hts-users:00898] Re: help in parameter generation algorithm

[Mohammed Samir <msamirhb@xxxxxxxxx>]

--- Keiichi Tokuda <tokuda@xxxxxxxxxxxx> wrote:

> 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.

thank you for answering me but I still don't
understand according to what mathematical theory  
log P(O|Q,model)= -1/2 OT U-1 O + OT U-1 M + K ?
I want the mathematical reference to refer to it
please. thank you

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