数字扬声器系统中失配整形技术的设计与实现  

Design and Implementation of Mismatch-shaping Dynamic Element Matching Techniques in Digital Loudspeaker System

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》2011年第2期20-23,共4页Audio Engineering

摘　　要：为了改善数字扬声器系统中由扬声器单元之间频响不一致引入的非线性谐波失真,在参考前人研究工作的基础上,给出了基于3 bit△∑调制编码方式的3种DEM(Dynamic Element Matching)失配整形算法的设计和实现方法,并在全消声室内测试了3种算法的谐波抑制能力,同时基于测试结果评价了这些算法的性能。To overcome the nonlinear harmonic distortion, which is introduced by the inconsistencies between the frequency response of the loudspeaker units in digital loudspeaker system, three mismatch-shaping dynamic element matching algorithms are designed and implemented based on the 3 bit modulation coding, in reference to previous studies. The ability of harmonic suppression of these algorithms is tested in anechoic room and the performance of these algorithms is evaluated based on the experiment results.

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]