音字转换系统中字词频的智能调整

音字转换是汉字的语音输入系统的一个主要组成部分，音字转换的速度和准确性直接影响整系统的性能。本文提出在音字转换过程中利用字词的概率统计信息进行辅助判决的方法，优化字词的选择，提高音字转换的速度，考虑到人们用词的时变性，提出一种在使用过程中对字词频进行智能调整的算法，并引入遗忘机制以适应词频的减量变化。

AN ALGORITHM FOR INTELLIGENT ADJUSTING PROBABILITY OF THE WORDS IN CHINESE PHONETIC-TO-WORD CONVERSION SYSTEM

Chinese phonetic-to-word conversion sub-system is an important part of Chinese speech inputting system.The conversion speed and precision directly affect the performance of the whole system.An auxiliary decision method which take use of the statistics information of the Chinese word is presented in this paper.It improves the speed of the Chinese phonetic-to-word conversion system,and the selection procedure of Chinese word can be largely optimized. Since there exist timevarying characteristic when the words are used,an intelligent adjustment algorithm for the statistics probability of a word is proposed to solve this problem.A forgetting factor is also introduced in our system to adapt the decreasing of the probability of the words.When the algorithm fulfill in our system, it imporves the words selection time by 40 percent,and improves the input speed by 20%.