JITTER BUFFER

在voice over IP(VoIP)中，抖动缓冲器是一个共享的数据区域，在这个数据区域中，每隔一段均匀的间隔，语音包会被收集，存储 并发到语音处理器。包到达时间的变化，称作抖动，将会由于网络 拥 塞，定时漂移或路由变更而产生。抖动缓冲器放于语音连接的接收端，它有意地延迟到达的包，如此一来，终端用户就会感受到一个清晰的，没有什么声音失真的连 接。抖动缓冲器有两种，静态的和动态的。静态抖动缓冲器是基于硬件的，它是由厂家来配置的。而动态抖动缓冲器是基于软件的，它由网管配置以适应网络延迟的 改变。

 

In voice over IP (VoIP ), a jitter buffer is a shared data area where voice packets can be collected, stored, and sent to the voice processor in evenly spaced intervals. Variations in packet arrival time, called jitter , can occur because of network congestion, timing drift, or route changes. The jitter buffer, which is located at the receiving end of the voice connection, intentionally delays the arriving packet s so that the end user experiences a clear connection with very little sound distortion. There are two kinds of jitter buffers, static and dynamic. A static jitter buffer is hardware-based and is configured by the manufacturer. A dynamic jitter buffer is software-based and can be configured by the network administrator to adapt to changes in the network's delay.

 

Reference:

http://www.4oa.com/whatis/sort03158/238920.html

http://searchunifiedcommunications.techtarget.com/sDefinition/0,,sid186_gci906844,00.html