Guide to correcting aligner textgrids

Guidelines for Correcting Aligner Textgrids

            USE YOUR EYES, AND YOUR EARS!  and be conservative with changes.  Aligner has criteria for all of its boundary placement, and unless we find a blatant mistake, leave boundaries as they are.

1) Word Level – Search through tier 2.

            – Use alt + –> or iterate scrip to scan through intervals make sure words align with  speech.

            – fix mistakes:  missing words, stutters, transcription mistakes

2) Phoneme Level – Search through tier 1.

            – Use alt + –> or iterate script to look for errors (especially after “sp”).

            – If there is an error, you will not be able to alt+ –> past the boundary

                        – delete/recreate interval

                        – fix label

3) For fixing phoneme tier.  Fix if:

            -boundaries do not correspond to actual segment boundaries.

See Figure 1 now.

 

–       To recognize vowel for adjustment, look at:

• Spectrogram
  • darker area in the spectrogram
  • greater intensity (yellow line going through the middle of the spectrogram) than in consonants
  • more stable formant structure (red lines)
• Waveform
  • greater amplitude and more regular, sinusoidal waveform.
  • Waveform will usually increase significantly entering the vowel, and drop significantly entering the stop-gap before the coda consonant.  These transitions in the waveform will correlate with darkness in the spectrogram.