Study on utilization and effectiveness of linguistic information in the word recognition based on phoneme, syllable or character sequence with errors

点击翻译按钮获取中文摘要

It is widely recognized that linguistic information must be used in the stage of word recognition based on phoneme, syllable or character recognition. However,the following questions have not been well investigated:1)What kinds of errors in phoneme,syllable or character recognition cause errors in word recognition? 2)When using a word dictionary as linguistic information, what is the relationship between the relationship between the phoneme,syllable or character recognition score, the word recognition score, and the vocabulary size? 3)When using transition probability as linguistic information, what is the relationship between them? In order to answer these problems, ,.it is particularly important to investigate the properties of phoneme,syllable or character pairs in distinguishing words within a short distance, where the distance between a pair of words is based on the phoneme,syllable or character pair differences between the two words. In this research, we investigate the properties of phoneme, syllable or character pairs in distinguishing word pairs with short distance in the 5317 Japanese popular words. Then we carry out performance evaluation in word recognition based on phoneme, syllable or character sequence with errors when using a word dictionary as linguist information. Next, we propose high speed algorithm for computing number of word pairs with short distance when using transition probability as linguistic information. In a similar fashion, we carry out the performance evaluation when using the transition probability.