基于层次分析法的电子音乐音质评价

Electronic music acoustic quality evaluation based on AHP

为准确评价电子音乐音质,采用层次分析法构建电子音乐音质评价指标体系结构。该结构将电子音乐音质评价作为目标层,将声源特性、音响器材的信号特征、声场特性、听觉特性和立体感作为准则层,将16个音质评价元素作为方案层,根据电子音乐音质评价指标体系结构各层次间元素的从属关系或并列关系,构建电子音乐音质判断矩阵。一致性检验判断矩阵,若不一致性比率小于0.1,说明判断矩阵不一致性比率在规定范围内,反之,再次构建新的判断矩阵。根据一致性检验,通过判断矩阵的最大特征值归一化后特征向量分量,获取电子音乐音质评价指标体系各层元素的权重,采用电子音乐音质评价元素权重和专家评分,评价电子音乐音质。应用实例结果表明,采用层次分析法能获取各电子音乐音质评价元素对音质的影响权重,得到准确的电子音乐音质评价结果。

For the accurate evaluation of electronic music acoustic quality,the AHP(analytic hierarchy process)is used to construct the structure of electronic music acoustic quality evaluation index system. In the structure,the electronic music acoustic quality evaluation is taken as the target layer,the acoustic source characteristics,the signal characteristics of audio equipment,the acoustic field characteristics,the auditory characteristics and the stereo feeling are taken as the criterion layer,and the 16 acoustic quality evaluation elements are taken as the scheme layer. An electronic music acoustic quality judgment matrix is constructed according to the subordination or parallel relationship of the elements between each level of the structure of electronic music acoustic quality evaluation index system. And then,the judgment matrix is subjected to check consistency. If the inconsistency ratio is less than 0.1,the inconsistency ratio of the judgment matrix is within the specified range. Otherwise,a new judgment matrix is constructed again. According to the check consistency,the element weight of each layer of the electronic music acoustic quality evaluation index system is obtained by the eigenvector component of the normalized maximum eigenvector of the judgment matrix. The weight of electronic music acoustic quality evaluation element and expert rating are adopted to evaluate the electronic music acoustic quality. The application examples show that the proposed system with AHP can obtain the influence weight of each electronic music acoustic quality evaluation element on the acoustic quality,and obtain the accurate electronic music acoustic quality evaluation result.