Click here to register.

Google Summer of Code Ideas Page

Flat
Acoustic Model Conversion scripts for ISIP/HTK/Julius/Sphinx
User: kmaclean
Date: 3/6/2007 1:09 pm
Views: 11427
Rating: 31

Some speech recognition companies have trained Acoustic Models using HTK and run them under SPHINX (before  HDecode was available).   The means/variances/transition probability conversions should be relatively straightforward to accomplish.  Requirements:

1) develop some GPL code to do the acoustic model conversion (lets assume ARPA format LMs)

2) benchmark the ISIP/HTK/Julius/Sphinx recognizers using exactly the same acoustic models, pronunciations and language models.



Re: Acoustic Model Conversion scripts for ISIP/HTK/Julius/Sphinx
User: kmaclean
Date: 5/3/2007 10:50 am
Views: 720
Rating: 33

See this post for info on a Sphinx to HTK conversion script.

Ken 

Re: Acoustic Model Conversion scripts for ISIP/HTK/Julius/Sphinx
User: kmaclean
Date: 7/23/2007 2:36 pm
Views: 7579
Rating: 38

From wout's home page:

HTK to Sphinx 3 model converter

In june 2007, I tried to compare the speed and accuracy of HTK and Sphinx 3 (and ISIP Prototype and Julius) with each other. Because I had models for HTK and didn't want to have to create new models for Sphinx 3, I started working on an HTK to Sphinx 3 model converter.

I didn't have enough time to complete the comparison, but I did almost finish the converter. I say "almost", because although the converter can convert my models without problems and the Sphinx 3 accepts the models, I didn't have time to actually use the models to decode audio. This means that I don't know if there are any non-obvious bugs left in the conversion process and I don't know whether Sphinx 3 can achieve the same performance with converted HTK models as HTK can (i.e. whether the conversion process creates a loss in accuracy).

I won't be developing the converter anymore, but anyone who is interested may download, use and modify the converter for their uses. The converter can be found here.

 

PreviousNext