摘要
详细分析只读式光盘读写电路的原理,对其中的关键部分A/D转换和D/A转换电路进行深入的研究,并进行了实验仿真。实验结果表明,在音频数字系统中,将模拟信号转换为数字信号,并以数字信号的形式进行处理、传输或存储,可避免在记录的过程中各种失真,使重放时的音乐质量得到极大的改善。
The paper detailedly analyzes the read/write circuit principle of CD - ROM, deeply researches the key part of it - A/D and D/A conversion circuit, and it is simulated by experiments. The result shows that the analogue signals are tured into discrete digital signals, and it＇s processing, transmission and storage are in form of discrete digital signals. Recording based on this form can avoid all kind of distortions during the course of recording, so the quality of music could be improved greatly when it is replayed.
出处
《长沙航空职业技术学院学报》
2008年第4期42-47,共6页
Journal of Changsha Aeronautical Vocational and Technical College
基金
2006年湖南省教育厅科学研究项目<基于MEMS-DMs的自适应光束整形模型研究>(项目号:06C105)阶段性研究成果
关键词
读写原理
A/D和D/A变换
EFM调制
实验仿真
Read - writing Principle
A/D and D/A Transforming
EFM confection
simulating experiment
