中文摘要：

针对藏语读音首先看后加字，然后根据元音的位置关系决定读音，而且元音比辅音携带更多听觉感知信息的特点，提出了一种改进的 HTK系统藏语孤立词语音识别技术．在识别特征参数中，增加更能表征元音特征的共振峰参数提高语音识别的正确性，通过循环迭代方法提高语音训练速度，利用藏文字母拉丁转写方法解决藏文和语音识别系统编码不一致的问题．在二次开发的H T K平台进行实验，正确率达到92.83％，实验结果表明元音特征在藏语音识别中起到重要作用．

英文摘要：

Aiming at Tibetan pronunciation firstly look after hong jia zi , then its pronunciation is determined by the position of vowel , and a vowel carry more auditory perception information than a consonant in speech ,a Tibetan isolated word speech recognition technology of improved HTK system is proposed in this paper . The accuracy of speech recognition is improved by increasing a formant parameter in the recognition characteristic parameters , the formant parameter can characterize vowel features very well , the speech training speed is raised by cycle iteration , Tibetan letters transformation Latin alphabet solves inconsistent problem that Tibetan and speech recognition system code . The test is executed on the secondary developing HTK platform , the correct rate reaches 92.83% . Experimental result indicates that vowel features play an important role in Tibetan speech recognition .