Hi all
I
also encountered this problem using LF0 with MGC.
When
GV is enabled, the amplitude is enhanced and sometimes it overflows. I don’t know
if hts_engine is using “double” as its internal data type. Maybe checking and
decreasing the total amplitude before converting to “short” will do help?
----------------------------------------------------------------------
Best wishes,
Jun Xu
Room 3-522, FIT Building,
Tsinghua University,
Beijing, China, 100084
From: xavigonzalvo@xxxxxxxxx
[mailto:xavigonzalvo@xxxxxxxxx] On Behalf Of Xavi Gonzalvo
Sent: Wednesday, July 30, 2008 7:17 PM
To: hts-users@xxxxxxxxxxxxxxx
Subject: [hts-users:01583] Re: GV causes clipping
Hi,
It happened to us with mcep.
Decreasing the weight of GV for spectrum alleviates the problem, but it doesn't
solve it as it can appear in other files.
Regards
2008/7/30 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
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please visit http://www.messagelabs.com/email
> ______________________________________________________________________
>
>