Editing MPEG transport stream (section)

==Overview==
[[Image:MPEG Transport Stream HL.svg|thumb|right|400px|Multiple MPEG programs are combined then sent to a transmitting antenna. The receiver parses and decodes one of the streams.]]

A transport stream encapsulates a number of other substreams, often [[packetized elementary stream]]s (PESs) which in turn wrap the [[Elementary stream|main data stream]] using the MPEG codec or any number of non-MPEG codecs (such as [[Dolby Digital|AC3]] or [[DTS (sound system)|DTS]] audio, and [[MJPEG]] or [[JPEG 2000]] video), text and pictures for subtitles, tables identifying the streams, and even broadcaster-specific information such as an [[electronic program guide]]. Many streams are often mixed together, such as several different television channels, or multiple [[DVD-Video#Chapters and angles|angles]] of a movie.

Each stream is chopped into (at most) 188-byte sections and interleaved together.  Due to the tiny packet size, streams can be interleaved with less latency and greater error resilience compared to [[MPEG program stream|program streams]] and other common containers such as [[Audio Video Interleave|AVI]], [[QuickTime File Format|MOV]]/[[MP4]], and [[Matroska|MKV]], which generally wrap each frame into one packet. This is particularly important for videoconferencing, where large frames may introduce unacceptable audio delay.

Transport streams tend to be broadcast as [[constant bitrate]] (CBR) and filled with padding bytes when not enough data exists.{{efn|The [[Blu-ray]] format does not require CBR.}}