A Comparison of Different Machine Transliteration Models
Table 18: Ranking performance of each search method.
['[EMPTY]', 'EKSet BPS', 'EKSet BKS', 'EKSet MKS', 'EJSet BPS', 'EJSet BKS', 'EJSet MKS']
We examined the relationship between the search method and the transliteration ranking. The RTC represents correct transliterations ranked by each search method. The NTC represents test data ranked, that is, the coverage of each search method. The ratio of RTC to NTC represents the upper bound of performance and the difference between RTC and NTC is the number of errors. NTC was smaller with a BKS and an MKS because a BPS retrieves web documents whenever possible. The results also show that a BKS was more effective than an MKS.