数字扬声器中三阶动态失配整形技术的实现  

Implementation of Three-order Mismatch-shaping Dynamic Element Matching Techniques in Digital Loudspeaker

作　　者：蔡野锋[1] 马登永[1,2] 沐永生[1] 杨军[1] 周建明[2] 柴国强[2] 

机构地区：[1]中国科学院声学研究所通信声学实验室,北京100190 [2]苏州上声电子有限公司,江苏苏州215133

出　　处：《电声技术》2012年第1期23-25,共3页Audio Engineering

摘　　要：为了进一步降低数字扬声器系统中由阵元通道之间的频响差异引入的噪声,在参考前人研究工作的基础上,给出了三阶动态失配整形算法的设计和实现方法,在全消声室内测试了此算法的信噪比性能,并与二阶动态失配整形算法做了比较。实验表明,三阶动态失配整形算法信噪比性能要优于二阶动态失配整形算法。In order to further reduce the noise level, which is introduced by the inconsistencies among the frequency re- sponses of the loudspeakers in digital loudspeaker system, three - order mismatch - shaping dynamic element matching （DEM） algorithm is designed and implemented based on previous studies. The experiment results obtained in the anechoic room show that the signal - to - noise ratio （SNR） performance of three - order mismatch - shaping DEM is better than that of second - order mismatch - shaping DEM.

关 键 词：数字扬声器 动态单元匹配 失配整形 

分 类 号：TN643[电子电信—电路与系统]