No Need for a Lexicon? Evaluating the Value of the Pronunciation Lexica in End-to-End Models
Table 5: WER of CIP vs. Graphemes For Mulit-dialect
['Dialect', 'IN', 'GB', 'ZA', 'NG', 'KE']
In this section, we compare the performance of phones vs. graphemes for a multi-dialect English system. Both systems use a 5x1024 encoder with single-head attention, followed by a 2x1024 decoder. For the phoneme systems, we use a unified phone set and a unified L, but a language-specific G for each language. The table shows that across the board the phoneme system is worse than the grapheme system.