信号、噪声通过线性工作系统设备过程中信噪比的变化

Change of SNR While Signal and Noise Are Passing Through Linear Working System Equipment

本文就信号、噪声通过线性工作系统设备过程中信噪比变化的问题，提出一个简单和实用的模型，建立相应的计算公式，并在视频领域和音频领域对公式展开讨论，进一步阐述公式的实用性，可作为工作系统的设计和调整的参考，以祈获得更好的社会效益和经济效益．

In this paper the author puts forward a simple nad practical model for studying the change in SNR while signal and noise are passing through linear system equipment,and establishes the formula for its corresponding calculation,Then the author further discusses and explains its practicality in audio and video field.It is suggeted that the model and the formula be ueed in working system designing and adjustment for beeter social benefits and ecomoic results.