A top-level architecture of the system is given in Figure 11.1 . Live content is received from satellites or ﬁ ber from content providers. This is then decoded and the video and audio are processed in the MediaFLO Transcode and Multiplex System (MTMS). In quite a stark contrast to the multiple hierarchies of a “ mobile channel multiplex ” followed by “ transport stream multiplex ” used in MPEG-2-based systems, the multiplexing in MediaFLO technology is stream-based. These streams are provided by the FLO air interface and are explained later in the chapter. Each audio and video after encoding thus gets assigned to a stream and the bandwidth used is based on the variable data rates generated by the encoders, making it very efﬁ cient in statistical multiplexing. Moreover, the streams are combined in the FLO air interface by time division multiplexing and provide power-saving options to a receiver.