4 |
Source multiplexing |
4.1 Organization of the MPEG-1 multiplex: system layer
Audio and video encoders deliver as their output elementary streams (ES) which are the constituents of the so-called compression layer. Each elementary stream carries access units (AU) which are the coded representations of presentation units (PU), i.e. decoded pictures or audio frames depending on the nature of the elementary stream.
These bitstreams, as well as other streams carrying other private data, have to be combined in an organized manner and supplemented with additional information to allow their separation by the decoder, synchronization of picture and sound, and selection by the user of the particular components of interest. Part I (system) of ISO/IEC ...
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