Table 6 Perplexities of bigram and trigram phoneme and word level language models on the training text (speech database transcriptions for phonemes, lyrics text for words) and on test lyrics texts.
Language model | Training text |
|
|
|---|---|---|---|
Phoneme bigram | 11.5 | 11.8 | 11.3 |
Phoneme trigram | 6.4 | 8.4 | 8.3 |
Word bigram | 90.2 | 147.1 | 97.8 |
Word trigram | 53.7 | 117.8 | 77.5 |
OOV % | 5.9 | 2.2 | 2.5 |
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