西北师范大学学报（自然科学版）
西北師範大學學報（自然科學版）
서북사범대학학보（자연과학판）
Journal of Northwest Normal University (Natural Science)
2015年
5期
50-54
,共5页
赵尔平%王聪华%党红恩%雒伟群
趙爾平%王聰華%黨紅恩%雒偉群
조이평%왕총화%당홍은%락위군
藏语孤立词%共振峰%M el倒谱特征%循环迭代%隐马尔可夫模型%语音识别
藏語孤立詞%共振峰%M el倒譜特徵%循環迭代%隱馬爾可伕模型%語音識彆
장어고립사%공진봉%M el도보특정%순배질대%은마이가부모형%어음식별
Tibetan isolated word%formant%Mel cepstrum features%loop iteration%HMM%speech recognition
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．
針對藏語讀音首先看後加字，然後根據元音的位置關繫決定讀音，而且元音比輔音攜帶更多聽覺感知信息的特點，提齣瞭一種改進的 HTK繫統藏語孤立詞語音識彆技術．在識彆特徵參數中，增加更能錶徵元音特徵的共振峰參數提高語音識彆的正確性，通過循環迭代方法提高語音訓練速度，利用藏文字母拉丁轉寫方法解決藏文和語音識彆繫統編碼不一緻的問題．在二次開髮的H T K平檯進行實驗，正確率達到92.83％，實驗結果錶明元音特徵在藏語音識彆中起到重要作用．
침대장어독음수선간후가자，연후근거원음적위치관계결정독음，이차원음비보음휴대경다은각감지신식적특점，제출료일충개진적 HTK계통장어고립사어음식별기술．재식별특정삼수중，증가경능표정원음특정적공진봉삼수제고어음식별적정학성，통과순배질대방법제고어음훈련속도，이용장문자모랍정전사방법해결장문화어음식별계통편마불일치적문제．재이차개발적H T K평태진행실험，정학솔체도92.83％，실험결과표명원음특정재장어음식별중기도중요작용．
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 .
