论文首先阐述了IP电话的基本原理，技术构成和各种可能的设计方案，在此基础上对静音检测技术进行研究的重要性。在目前国际上新出现的各种有关静音检测算法的基础上，针对VOIP的要求和DSP芯片的特点，对其进行了理论上的改进和实现技术上的优化。-Paper first describes the basic principles of IP telephony, technical composition and a variety of possible designs, in this based on silence detection technology, the importance of research. In the current international emerging all relevant silence detection algorithm based on the requirements for VOIP and the characteristics of DSP chips, theoretically its improvement and implementation of optimization technology.