[hts-users:03633] Re: Duration mean rounding

[Dietmar Schabus <schabus@xxxxxx>]

Ah, yes. I didn't understand the meaning of "diff". Thank you very much 
for your explanation!


On 2013-02-21 16:29, 那兴宇 wrote:
> Duration is rounded sequentially, not individually. The variable 'diff'
> is used to store the difference between rounded value and mean value of
> the previous states. The actual rounded value is 'dur+diff', other than
> 'dur'.
>
> --
> Xingyu Na (那兴宇)
> http://www.idiap.ch/~xna/
>
>
> At  2013-02-21  23:16:16,"Dietmar  Schabus"  <schabus@xxxxxx>  wrote:
> > Hi  all,
> >
> > I'm  trying  to  understand  the  duration  modeling  in  detail.  When  I  look  at
> > the  .dur  files  created  by  HMGenS,  I  sometimes  see  some  unexpected  numbers:
> >
> > t^P6-sil+x=x@    ...    -1.state[2]:  duration=5  (frame),  mean=5.174239e+00
> > t^P6-sil+x=x@    ...    -1.state[3]:  duration=11  (frame),  mean=1.025650e+01
> > t^P6-sil+x=x@    ...    -1.state[4]:  duration=22  (frame),  mean=2.222014e+01
> > t^P6-sil+x=x@    ...    -1.state[5]:  duration=6  (frame),  mean=6.575937e+00
> > t^P6-sil+x=x@    ...    -1.state[6]:  duration=2  (frame),  mean=1.950120e+00
> >
> > In  general,  the  number  of  frames  is  the  rounded  mean.  But  sometimes,
> > like  in  the  fourth  row  here,  it  seems  to  be  floored  rather  than  rounded.
> > Sometimes  it  also  seems  ceiled.
> >
> > I  am  using  HTS  2.2,  and  in  HGen.c  (lines  796  etc.)  I  see:
> >
> > dur  =  (rFlags&RNDDUR)  ?  GaussDeviate(mean[i][k],sqrt(1.0/ivar[i][k]))  /*
> > random  duration  sampling  */
> >                                                                :  mean[i][k]+rho/ivar[i][k];
> >                    genInfo->durations[i][j]  =  (int)(dur+diff+0.5);
> >
> > I  don't  see  where  RNDDUR  would  be  set,  so  I  assume  I  am  not  randomly
> > sampling  (not  100%  sure  though,  where  should  I  look?).
> > I  am  calling  HMGenS  with  -r  1.0,  so  rho  should  be  0.0
> > So  I  would  expect  7  frames  and  not  6  in  the  fourth  row  above.
> >
> > Does  anybody  understand  what's  going  on?
> >
> > Thank  you,  Dietmar
> >
> > --
> > ----------------------------------------------------------------------
> > Dipl.-Ing.  Dietmar  Schabus  |  Researcher
> > phone  +43  1  5052830-48  |  fax  -99  |  schabus@xxxxxx  |
> > http://userver.ftw.at/~schabus/
> >
> > FTW  Telecommunications  Research  Center  Vienna
> > Donau-City-Straße  1/3  |  1220  Vienna  |  Austria  |  www.ftw.at