CAJ | 학술논문

鉴于语音识别性能与所选用的语音特征参数密切相关,提出一种系统性的实用的特征参数优化方法--基于方差的正交实验设计法.首先进行因素(语音特征参数)和水平的选择,再根据数理统计与正交性原理,从大量的实验点中挑选适量的具有代表性、典型性的点构造正交表进行正交实验,最后通过计算对正交实验结果进行分析,找出最优的特征参数组合.与目前参数的简单组合方案相比较,新方法的误识率下降了5.6%,响应时间减少了181.37ms.实验结果表明,正交实验设计用于语音特征参数优化是有效的,对后续研究具有指导意义.
감우어음식별성능여소선용적어음특정삼수밀절상관,제출일충계통성적실용적특정삼수우화방법--기우방차적정교실험설계법.수선진행인소(어음특정삼수)화수평적선택,재근거수리통계여정교성원리,종대량적실험점중도선괄량적구유대표성、전형성적점구조정교표진행정교실험,최후통과계산대정교실험결과진행분석,조출최우적특정삼수조합.여목전삼수적간단조합방안상비교,신방법적오식솔하강료5.6%,향응시간감소료181.37ms.실험결과표명,정교실험설계용우어음특정삼수우화시유효적,대후속연구구유지도의의.
The performance of speech recognition depends on the choice of speech parameters.A systematic and practical method of the parameters selection based on the variance orthogonal test design was proposed.Firstly,chose factors (speech parameters) and levels.And then according to the principle of mathematical statistics and orthogonality,picked out proper and representative points from a large number experimental points to construct orthogonal table.Finally,calculated and analysed the experimental results,and the optimal set of process parameter values was discovered.Moreover,the word error rate is reduced 5.6 % and response time is reduced 181.37ms when compared with that of the traditional parameter selection method.The experiment results show that the application of orthogonal test design is effective in parameter optimization.The conclusion provides guidance for the subsequent research.