Packetized Elementary Stream (PES) is a specification in the MPEG-2 Part 1 (Systems) (ISO/IEC 13818-1) and ITU-T H.222.0[1][2] that defines carrying of elementary streams (usually the output of an audio or video encoder) in packets within MPEG program streams and MPEG transport streams.[3] The elementary stream is packetized by encapsulating sequential data bytes from the elementary stream inside PES packet headers.
A typical method of transmitting elementary stream data from a video or audio encoder is to first create PES packets from the elementary stream data and then to encapsulate these PES packets inside Transport Stream (TS) packets or Program Stream (PS) packets. The TS packets can then be multiplexed and transmitted using broadcasting techniques, such as those used in an ATSC and DVB.
Transport Streams and Program Streams are each logically constructed from PES packets. PES packets shall be used to convert between Transport Streams and Program Streams. In some cases the PES packets need not be modified when performing such conversions. PES packets may be much larger than the size of a Transport Stream packet.[3]
- ^ ITU-T (November 2014). "H.222.0 Summary". Retrieved 2015-11-17.
- ^ ITU-T. "H.222.0 : Information technology - Generic coding of moving pictures and associated audio information: Systems". Retrieved 2010-06-03.
- ^ a b "ISO/IEC 13818-1 — Information technology — Generic coding of moving pictures and associated audio information: Systems" (PDF) (second ed.). 2000-12-01. Retrieved 2009-07-25.