MPEG program stream: Difference between revisions

Revision as of 18:43, 5 April 2010

Revision as of 11:00, 3 June 2010

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| standard = ISO/IEC 11172-1, ISO/IEC 13818-1

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'''Program stream''' ('''PS''' or '''MPEG-PS''') is a [[container format (digital)|container format]] for [[multiplexing]] [[digital audio]], [[video]] and more. The PS format is specified in [[MPEG-1]] Part 1 (ISO/IEC 11172-1) and [[MPEG-2]] Part 1, Systems (ISO/IEC standard [13818-1<ref name="mpeg2systems-neuron">{{citation |url=http://neuron2.net/library/mpeg2/iso13818-1.pdf |title=ISO/IEC 13818-1]:2000 - Information technology -- Generic coding of moving pictures and associated audio information: Systems |format=PDF |publisher=neuron2.net |date=2000-12-01 |accessdate=2010-06-03}}</ref>/ITU-T H.222.0<ref>{{cite web |url=http://www.itu.int/dms_pubrec/itu-t/rec/h/T-REC-H.222.0-200605-I!!SUM-HTM-E.htm |title=H.222.0 Summary |author=ITU-T |date=2006-05 |accessdate=2010-06-03}}</ref><ref>{{cite web |url=http://www.itu.int/rec/T-REC-H.222.0 |title=H.222.0 : Information technology - Generic coding of moving pictures and associated audio information: Systems |author=ITU-T |accessdate=2010-06-03}}</ref>). The MPEG-2 Program Stream is analogous and similar to ISO/IEC 11172 Systems layer and it is forward compatible.<ref name="iso13818">ISO (2000-12-01) [http://neuron2.net/library/mpeg2/iso13818-1.pdf ISO/IEC 13818-1 : 2000, Second edition] Page X, Retrieved on 2009-07-25</ref><ref>[http://books.google.com/books?id=L7N0LQvBKtYC&lpg=PA39&ots=P9VPn4q1zA&dq=mpeg%20program%20stream%20specification&hl=cs&pg=PA39 Data Broadcasting, MPEG-2 Transport Basics, MPEG-2 Program Stream], Retrieved on 2009-07-25</ref>

Program streams are created by combining one or more [[Packetized Elementary Stream]]s (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 code]]s which would make over the air reception difficult, but has less overhead. Program stream coding layer allows only one [[MPEG transport stream#Programs|program]] of one or more elementary streams to be combined into a single stream, in contrast to transport stream, which allows multiple programs.<ref name="iso13818" />