An elementary video is a type of elementary stream defined by a MPEG communication protocol output by an encoder. This format relies on the codec or data carrier in the stream.
Elementary video streams that are processed contain similar start codes found in an MPEG-2 elementary stream. Elementary videos encoding is done using a codec that uses the MPEG-2 standard, unlike audio that uses MPEG-1.
When encoding a video file, it is broken into packets with headers that signify presentation time stamps that allow the streams to play in sync when later decoded.
MPEG-2 use is in DVD’s and Digital Video Broadcast to code for moving pictures and their associated audio information. It is also possible to send elementary videos over digital signals after encoding them in this format.
With the elementary data streaming of the MPEG-2 and few enhancements, these videos are also of use in some HDTV transmission systems.