Program stream (PS or MPEG-PS) is a
container format for
multiplexing digital audio,
video
Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) syst ...
and more. The PS format is specified in
MPEG-1
MPEG-1 is a standard for lossy compression of video and audio. It is designed to compress VHS-quality raw digital video and CD audio down to about 1.5 Mbit/s (26:1 and 6:1 compression ratios respectively) without excessive quality loss, making ...
Part 1 (ISO/IEC 11172-1) and
MPEG-2 Part 1, Systems (ISO/IEC standard 13818-1
/ITU-T H.222.0
). The MPEG-2 Program Stream is analogous and similar to ISO/IEC 11172 Systems layer and it is forward compatible.
[ISO (2000-12-01]
ISO/IEC 13818-1 : 2000, Second edition
Page X, Retrieved on 2009-07-25
Program streams are used on
DVD-Video discs and
HD DVD
HD DVD (short for High Definition Digital Versatile Disc) is an obsolete high-density optical disc format for storing data and playback of high-definition video. Supported principally by Toshiba, HD DVD was envisioned to be the successor to the ...
video discs, but with some restrictions and extensions.
[DVD - MPeg differences](_blank)
Retrieved on 2009-07-24 The filename extensions are
VOB and
EVO respectively.
Coding structure
Program streams are created by combining one or more
Packetized Elementary Streams (PES), which have a common time base, into a single stream. It is designed for reasonably reliable media such as disks, in contrast to
MPEG transport stream which is for data transmission in which loss of data is likely. Program streams have variable size records and minimal use of
start codes which would make over the air reception difficult, but has less overhead. Program stream coding layer allows only one
program of one or more elementary streams to be packaged into a single stream, in contrast to transport stream, which allows multiple programs.
MPEG-2 Program stream can contain MPEG-1 Part 2 video,
MPEG-2 Part 2 video, MPEG-1 Part 3 audio (
MP3
MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany, with support from other digital scientists in the United States and elsewhere. Origin ...
,
MP2,
MP1
MPEG-1 Audio Layer I, commonly abbreviated to MP1, is one of three audio formats included in the MPEG-1 standard. It is a deliberately simplified version of MPEG-1 Audio Layer II (MP2), created for applications where lower compression efficiency ...
) or MPEG-2 Part 3 audio.
It can also contain
MPEG-4 Part 2
MPEG-4 Part 2, MPEG-4 Visual (formally ISO/ IEC 14496-2) is a video compression format developed by the Moving Picture Experts Group (MPEG). It belongs to the MPEG-4 ISO/IEC standards. It uses block-wise motion compensation and a discrete cosine ...
video, MPEG-2 Part 7 audio (
AAC) or MPEG-4 Part 3 (AAC) audio,
but they are rarely used. The MPEG-2 Program stream has provisions for non-standard data (e.g.
AC-3 audio or subtitles) in the form of so-called private streams.
[What is a VOB file](_blank)
Retrieved on 2009-07-26 International Organization for Standardization authorized
SMPTE
The Society of Motion Picture and Television Engineers (SMPTE) (, rarely ), founded in 1916 as the Society of Motion Picture Engineers or SMPE, is a global professional association of engineers, technologists, and executives working in the m ...
Registration Authority, LLC as the registration authority for MPEG-2 format identifiers. It publishes a list of compression formats which can be encapsulated in MPEG-2 transport stream and program stream.
Coding details
See also
*
Elementary stream An elementary stream (ES) as defined by the MPEG communication protocol is usually the output of an audio encoder or video encoder. An ES contains only one kind of data (e.g. audio, video, or closed caption). An elementary stream is often referred ...
*
MPEG transport stream
References
External links
MPEG-2Official MPEG web siteBBC On MPEGRFC 3555- MIME Type Registration of RTP Payload Formats (video/MP2P, video/MP1S)
{{DEFAULTSORT:Mpeg Program Stream
Digital container formats
MPEG
MPEG-2
ITU-T recommendations