基于音频信号的量化噪声教学实验  

Teaching Experiment of Quantization Noise Based on Audio Signal

作　　者：王建秋 刘康 张书强 陈光宇 许可 WANG Jianqiu;LIU Kang;ZHANG Shuqiang;CHEN Guangyu;XU Ke(College of Electronic Science and Technology,National University of Defense Technolgy,Changsha 410073,China;College of Information and Communication,National University of Defense Technolgy,Wuhan 430000,China;China Xi′an Satellite Control Center,Xi′an 710043,China)

机构地区：[1]国防科技大学电子科学学院,长沙410073 [2]国防科技大学信息通信学院,武汉430000 [3]西安卫星测控中心,西安710073

出　　处：《电气电子教学学报》2022年第5期96-99,共4页Journal of Electrical and Electronic Education

基　　金：国防科技大学本科教改重点课题(U2020102);国防科技大学一般课题(U2019015,U2019013)。

摘　　要：量化噪声的产生及其特性,是“数字信号处理”课程中一个贴近工程实践的重要知识点。有别于传统理论讲授模式,设计了一个“量化噪声响起来,看得见”的教学实验,分别通过截尾和舍入两种量化方式对音频信号进行处理,不仅可以让学生直观感受量化噪声的存在与特性,还可以更深刻理解量化方式、量化位数等因素对量化噪声特性的影响。The generation and characteristics of quantization noise is an important knowledge point in the course of Digital Signal P rocessing and sticks to engineering practice. Different from the conventional theory-teaching method, this paper designs a teaching experiment of “quantization noise is audible and visible”. The audio signal is processed by two quantization methods of truncation and rounding, which not only allows students to intuitively feel the existence and characteristics of quantization noise, but also enables students to have a deeper understanding of the influence of quantization methods, quantization bits and other factors on the characteristics of quantization noise.

关 键 词：量化噪声 量化方式 量化位数 

分 类 号：TN911[电子电信—通信与信息系统]