[hts-users:01581] Re: GV causes clipping

["Nicholas Volk" <nvolk@xxxxxxxxxx>]

Thanks for the reply. Prettu much what I expected but just wnated to check
I wasn't missing something obvious...
I'm using hts_engine. Changing the factor from 1.0 to, say, 0.5 solves the
problem.

br,
  Nicholas


> Hi,
>
> Nicholas Volk wrote:
>
>> I'm applied global variance to a 22kHz male voice. There's some
>> occasional
>> clipping when using gv. Without GV the results are fine. (Without gv the
>> min and max of the waveform are around +-20000, not far from SLT demo
>> voice.)
>> Have you had this clipping problem with any voices?
>
> This is because the use of GV enhances dynamic ranges of speech
> parameter trajectories.  It sometimes over-enhancement and causes
> overflow.
>
> BTW, which are you using, hts_engine or HMGenS?
>
> Regards,
>
> Heiga ZEN (Byung Ha CHUN)
>
> --
> Heiga ZEN (Byung Ha CHUN)
> Speech Technology Group
> Cambridge Research Lab
> Toshiba Research Europe
> phone: +44 1223 436975
>
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