[hts-users:00354] about " decision trees"

["lei liu" <wenshiliu@xxxxxxxxx>]

Hi,

 

I  have  read the " tree-dur.inf"  ,"tree-lf0.inf" ," tree-mcep.inf"  in  the  " HTS voices for Festival" .

 

and    I  found  there is only one tree for  duratoin ( state 2) ,

 

but for f0 and mcep , there are 5 trees (state 2 ,3 4, 5, 6 ) .

 

why?

 

-----------------------

in  the  "inf "  file,   the tree is as followed:

 

pau[2]
{ 
     -1 Pos_C-Syl_in_C-Phrase(Bw)==1                           -2               -9   

}

 

-1 is the index of the node ,

-2 is the index of node->yes

-9 is the index of node-> no

 

why  the  index are all the negative?

------------------------------------------

 

There is only one tree for every state in the "inf" file.

does it mean the tree is used by all the phoneme.

 

for example ,

 

the phoneme  'a'  , 'b' , 'c'.

the second states of  'a' ,'b','c'   are used to generate the tree of state 2 in the "tree-mcep.inf",

and then they use the same tree to generate voice.

 

before i read the "inf"  file ,

 

I  thought that   there  is a tree for  one  phoneme.

for example

 

the phoneme  '   b - a+ c   '     '   a - a+ c   '     '   b - a+ a  ' .................   ,

the second states of them  are use to generate the tree  for   phoneme  a ' s state 2

 

and also

' a -b+ c'   ' a -b+ b' ...................

there is a tree for them.

 

-------------------

 

Best regards