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[hts-users:00433] training error


Hi mailing-list,

we're trying to build a HMM synthesis for french using about 300 sentences and we have some problems during training

According to log file, the training went fine for the mono (using mono.list) part (5 iterations of HERest).

But when it starts the full context training, *some* of the cmp/lab files give this kind of error :

  Processing Data: sentence_0016_00.cmp; Label sentence_0016_00.lab
  Unable to traverse 530 states in 482 frames
  WARNING [-7324]  StepBack: Bad data or over pruning
  in /home/user/work/HTS-2.0/htk-3.4/HTKTools/HERest


(BTW :  Processing Data: sentence_0016_00.cmp; Label sentence_0016_00.lab didn't cause any error at all for mono part of training)

We did the same training but using only 20 sentences (*and among these, they were some of the sentences which caused the above error*) and it worked fine, no error at all (of course, the synthesis results were very poor)

This should mean that the error isn't caused by "Bad data".

Moreover, log file says :

  HERest  ML Updating: Transitions Means Variances MixWeights

  System is PLAIN
  29829 Logical/29829 Physical Models Loaded, VecSize=78
  1 MMF input files
  Pruning-Off
  Processing Data: sentence_0001_00.cmp; Label sentence_0001_00.lab

  ...

Which sounds to us like pruning is OFF, so the error shouldn't be caused by "over pruning"

So what could be the reason for the "Unable to traverse 530 states in 482 frames" error ?

we use HTS 2.0 rc2 + SPTK 3.0 + HTK 3.4

Thanks a lot

Alexis

Follow-Ups
[hts-users:00434] Re: training error, Heiga ZEN (Byung Ha CHUN)