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Step 5 - Coding the (Audio) Data

Create Codetrain.scp

HTK calls this last step in data preparation the "parameterizing the raw speech waveforms into sequences of feature vectors".  All this means is that HTK is not as efficient in processing wav files as it is with its internal format.  Therefore, you need to convert you audio wav files to another format called MFCC format (which refers to Mel Frequency Cepstral Coefficients; which are more generally referred to as 'feature vectors').

You use the HCopy tool to convert your wav files to MFCC format.  You have 2 options.  You could execute the HCopy command by hand for each audio file you created in Step 3, or you can create a file containing a list of each source audio file and the name of the MFCC file it will be converted to, and use that file as a parameter to the HCopy command.  We will use the second approach in this example.  Create the following 'codetrain.scp' script file in your 'voxforge/manual' folder:  codetrain.scpcodetrain.scp

Config file

The HCopy command performs the conversion from wav format to MFCC.  To do this, a configuration file (config) which specifies all the needed conversion parameters is required.  Create a file called wav_config in your 'voxforge/manual' folder and add the following:

SOURCEFORMAT = WAV
TARGETKIND = MFCC_0_D
TARGETRATE = 100000.0
SAVECOMPRESSED = T
SAVEWITHCRC = T
WINDOWSIZE = 250000.0
USEHAMMING = T
PREEMCOEF = 0.97
NUMCHANS = 26
CEPLIFTER = 22
NUMCEPS = 12

If you would like more details on the contents of the config file, please see the HTK documentation. 

Create a new directory called 'mfcc' in your 'voxforge/train' folder.  Then execute HCopy from your 'voxforge/manual' folder as follows:

$HCopy -A -D -T 1 -C wav_config -S codetrain.scp

The result is the creation of a series of mfc files corresponding to the files listed in your codetrain.scp script in the "voxforge/train/mfcc" folder.  Be sure to monitor the output of the HCopy command to ensure that all wav files get processed properly.  Most problems are related to file paths or audio files in a non-wav format.

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untitled
By Stewie - 11/16/2011 - 1 Replies

I was also in trouble about that issue

HCopy -A -D -T 1 -C ./input_files/wav_config -S ../codetrain.scp 

HTK Configuration Parameters[14]
  Module/Tool     Parameter                  Value
#                 RAWENERGY                  FALSE
#                 TRACE                          0
#                 ESCALE                  1.000000
#                 ENORMALISE                 FALSE
#                 ZMEANSOURCE                 TRUE
#                 NUMCEPS                       12
#                 NUMCHANS                      24
#                 PREEMCOEF               0.970000
#                 USEHAMMING                  TRUE
#                 WINDOWSIZE         250000.000000
#                 TARGETRATE         100000.000000
#                 TARGETKIND          MFCC_E_D_N_Z
#                 SOURCERATE                   625
#                 SOURCEFORMAT                 WAV

  ERROR [+1019]  SetConfParms: incompatible TARGETKIND=MFCC_E_D_N_Z for coding
 FATAL ERROR - Terminating program HCopy

But, I could sort of solve it, after I made all wav files; sample1 to sample31 following in step3.

Why don't you make all sample voice wav files, I guess you just made only one or some files same as me, didn't you.

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unable to set MFCC_E_D_N_Z as target for coding
By ashwin - 6/22/2011 - 1 Replies

i am not able to set MFCC_E_D_N_Z as the target for coding the wav files.

I get the following ERROR:

HCopy -A -D -T 1 -C ./input_files/wav_config -S ../codetrain.scp

HTK Configuration Parameters[14]
  Module/Tool     Parameter                  Value
#                 RAWENERGY                  FALSE
#                 TRACE                          0
#                 ESCALE                  1.000000
#                 ENORMALISE                 FALSE
#                 ZMEANSOURCE                 TRUE
#                 NUMCEPS                       12
#                 NUMCHANS                      24
#                 PREEMCOEF               0.970000
#                 USEHAMMING                  TRUE
#                 WINDOWSIZE         250000.000000
#                 TARGETRATE         100000.000000
#                 TARGETKIND          MFCC_E_D_N_Z
#                 SOURCERATE                   625
#                 SOURCEFORMAT                 WAV

  ERROR [+1019]  SetConfParms: incompatible TARGETKIND=MFCC_E_D_N_Z for coding
 FATAL ERROR - Terminating program HCopy


Please Help me out

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Configuration file
By gbernardi - 3/3/2011 - 1 Replies

Hi, I don't understand why it is not a problem that the configuration files we use for coding the data and the one used by HcompV do not have the same TARGETKIND...

 

Any suggestions?

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problem with the last part!
By Hossein Khaki - 2/8/2011 - 1 Replies

Hi

I do all first 5 steps correctly but when I want to do the 5st step for this command "

$HCopy -A -D -T 1 -C wav_config -S codetrain.scp 

I find these errors:

HCopy -A -D -T 1 -C wav_config -S codetrain.scp 

HTK Configuration Parameters[11]
 Module/Tool     Parameter                  Value
#                 NUMCEPS                       12
#                 CEPLIFTER                     22
#                 NUMCHANS                      26
#                 PREEMCOEF               0.970000
#                 USEHAMMING                  TRUE
#                 WINDOWSIZE         250000.000000
#                 SAVEWITHCRC                 TRUE
#                 SAVECOMPRESSED              TRUE
#                 TARGETRATE         100000.000000
#                 TARGETKIND              MFCC_0_D
#                 SOURCEFORMAT                 WAV

../train/wav/sample1.wav -> ../train/mfcc/sample1.mfc 
 ERROR [+6251]  Only standard PCM, mu-law & a-law supported
 ERROR [+6213]  OpenWaveInput: Get[format]HeaderInfo failed
 ERROR [+6313]  OpenAsChannel: OpenWaveInput failed
 ERROR [+6316]  OpenBuffer: OpenAsChannel failed
 ERROR [+1050]  OpenParmFile: Config parameters invalid
FATAL ERROR - Terminating program HCopy

 

by the way I think all parameter about my wave file is correct! here are the parameters:

codec: Uncompressed 16-bit PCM audio
channels: Mono
Sample rate: 48000 Hz
Bitrate: N/A
Please tell me where could I find the problem?
thanks

 

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Doubt regarding the output of hcopy
By Tom George - 11/28/2010 - 2 Replies

I used to hcopy command to extract the features of a wave file. But instead of getting numerical output i got a mfc file of illegible characters. 

Can anyone help me solve this problem?

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problems with wav format
By j17 - 9/27/2010 - 2 Replies

 

Hello everybody,

It is the first time I use HTK for speech recognition, and I'm trying to learn how to build an HMM model. But, I have one problem and I do not how to solve it. It is related to my speech files. I have converted my source files from RAW format to WAV in order to use them with HTK (using sox under UNIX), and before typing HCopy to create the mfc files, I would like to listen my wav files, using play, but an error occurs. Could anybody help me? Thank you.

play prueba.wav
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:3513:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:3513:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:3513:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:3985:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2184:(snd_pcm_open_noupdate) Unknown PCM default
sox: Failed writing default: cannot open audio device

 

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Problem with copy
By bejimed - 8/13/2010 - 1 Replies

can anyone help me 

this is the error i got

thank you

Copy -A -D -T 1 -C wav_config -S codetrain.scp
  ERROR [+5010]  SetScriptFile: Cannot open script file codetrain.scp
  ERROR [+5020]  InitShell: SetScriptFile failed on file codetrain.scp
  ERROR [+1000]  HCopy: InitShell failed
 FATAL ERROR - Terminating program HCopy

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Hcopy output
By novision - 5/20/2010 - 2 Replies

Hii all,


I am trying to make a decoder for myself. I need the feature parameters from htk.

I have used the same wav_config file as given in the tutorial for my HTK recognition software.But when i try to see the feature parameters(.mfc file) using the command HList , it shows 26 vectors per frame instead of 25(mfcc(12) + delta (12) + 0th(1),which it should show).

sample1.mfc

------------------------------------ Samples: 0->-1 ------------------------------------
0:     -18.144   3.699   0.551   2.406   6.086   6.956   3.845   5.387  11.362   7.867
         6.097   2.205  68.196   0.183  -0.022  -0.345   0.204  -1.470  -1.194   0.097
        -0.471  -1.137  -0.228  -0.189   0.845   0.130
1:     -18.078   2.801  -0.185   3.511   2.543   3.737   6.169   5.410   7.749   7.631
         6.462   7.283  68.259  -0.076  -0.009   0.427   0.709  -1.433  -1.166   0.350
        -0.488  -2.145  -0.693  -0.609   0.688   0.029

Am i wrong here conceptually?

If not then which vectors to take while calculating the observation probabilites for continuos densities(because we have used a proto having 25 vectors in the next step).

Plz help me understand htk..

thnx

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Running HCopy
By Gothrog - 3/22/2010 - 4 Replies

This is my first time running through this example on Step5.

I may have saved the wav files with 32 bits instead of 16 bits.  Would this have done something?

$ /usr/local/bin/HCopy -A -D -T 1 -C wav_config -S codetrain.scp
/usr/local/bin/HCopy -A -D -T 1 -C wav_config -S codetrain.scp

HTK Configuration Parameters[11]
  Module/Tool     Parameter                  Value
#                 NUMCEPS                       12
#                 CEPLIFTER                     22
#                 NUMCHANS                      26
#                 PREEMCOEF               0.970000
#                 USEHAMMING                  TRUE
#                 WINDOWSIZE         250000.000000
#                 SAVEWITHCRC                 TRUE
#                 SAVECOMPRESSED              TRUE
#                 TARGETRATE         100000.000000
#                 TARGETKIND              MFCC_0_D
#                 SOURCEFORMAT                 WAV

  ERROR [+6251]  Only standard PCM, mu-law & a-law supported
  ERROR [+6213]  OpenWaveInput: Get[format]HeaderInfo failed
  ERROR [+6313]  OpenAsChannel: OpenWaveInput failed
  ERROR [+6316]  OpenBuffer: OpenAsChannel failed
  ERROR [+1050]  OpenParmFile: Config parameters invalid
 FATAL ERROR - Terminating program /usr/local/bin/HCopy

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TIMIT wav file have problems!!
By spring - 12/23/2009 - 1 Replies

Hi,ken,I ask you for help!

Today,I used Hcopy to code timit wav file ,but I got the error :ERROR[+6251] GetTIMITHeaderInfo:Bad Numbers in TIMIT format header.I try to change the "SOURCEFORMAT" to "WAV"、"HTK"、"TIMIT"，But still can't code my timit wav file.So HELPLESS!

Anybody who had used timit wav file for training?NEED your help!

May I have your email please,ken?So I can send your some of my timit wav file for analyzing!Thank you very much!

spring

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Re: need your help
By Amit Surana - 5/30/2009

Please check the path of wav files in codetrain.scp

Suppose your codetrain.scp is in voxforge/manual and wave files in voxforge/train/wav.

Then path shud be :

../train/wav/sample1.wav ../train/mfcc/sample1.mfc

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need some help
By joshua - 3/30/2009 - 3 Replies

Hi i would need some help on this, can anyone help me?

This is the error i got.

Thank you!

 

 

$ HCopy -A -D -T 1 -C wav_config -S codetrain.scp

C:\cygwin\HTK\htk-3.3-windows-binary\htk\HCopy.exe -A -D -T 1 -C wav_config -S codetrain.scp

HTK Configuration Parameters[11]

Module/Tool   Parameter                       Value

#                   NUMCEPS                        12

#                   CEPLIFTER                       22

#                   NUMCHANS                     26

#                   PREEMCOEF                     0.97000

#                   USEHAMMING                  TRUE

#                   WINDOWSIZE                   250000.000000

#                   SAVEWITHCRC                  TRUE

#                   SAVECOMPRESSED            TRUE

#                   TARGETRATE                      100000.000000

$

#                    SOURCEFORMAT                WAV

 

ERROR [+6210] OpenWaveInput: Cannot open waveform file ../train/wave/sample1.wav

FATAL ERROR - Terminating program C:\cygwin\HTK\htk-3.3-windows-binary\htk\HCopy.exe

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