We have discussed the MPEG Multiplex earlier in chapter two. MPEG systems part is the control part of the MPEG standard. It addresses the combining of one or more streams of video and audio as well as other data, into a single or multiple streams which are suitable for storage or transmission. The figure below shows a simplified view of the MPEG control system.
Packetised Elementary Stream (PES)
PES stream consists of a continuous sequence of PES packets of one elementary stream. The PES packets would include information regarding the Elementary clock reference and the Elementary stream rate. The PES stream is not defined for interchange and interoperability though. Both fixed length and variable length PES packets are allowed.
The diagram 5.3illustrates the components of the MPEG Systems module: