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  • 7/23/2019 Mpeg Standards44444


    Moving Picture Experts Group

    From Wikipedia, the free encyclopedia

    MPEG logo

    "MPEG" redirects here. For the guild, see Motion Picture Editors Guild. For theunaliated company that licenses patent pools for some MPEG standards, seeMPEG L.

    The Moving Picture Experts Group(MPEG) is a working groupof experts that was formed by

    ISOand IECto set standards for audioand video compressionand transmission!"#It wasestab$ished in "%&& by the initiative of 'iroshi asuda(ippon Te$egraph and Te$ephone) and

    *eonardo Chiarig$ione!+#, who has been from the beginning the Chairman of the group The first

    -.E/ meeting was in -ay "%&& in Ottawa, Canada!0#!1#!2#3s of $ate +442, -.E/ has grown toinc$ude approximate$y 024 members per meeting from various industries, universities, and

    research institutions -.E/5s officia$ designation is ISO6IEC 7TC"6SC+% 8/"" 9 Coding of

    moving pictures and audio(ISO6IEC 7oint Technica$ Committee ", Subcommittee +%, 8orking/roup "")!:#!;#!!%#
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    # $%er%ie&

    ' (u) Groups * +ooperation &ith other groups

    o *.# oint -ideo eam

    o *.' oint +olla)orati%e eam on -ideo +oding

    / (tandards

    0 (tandardi1ation process

    2 (ee also

    3 4otes

    5 E6ternal links

    [edit] Overview

    +ompression methodology

    The -.E/ compression methodo$ogy is considered asymmetricas the encoderis more comp$ex

    than the decoder!"#The encoder needs to be a$gorithmicor adaptivewhereas the decoder is5dumb5 and carries out fixed actions!"#This is considered advantageous in app$ications such as

    broadcasting where the number of expensive comp$ex encoders is sma$$ but the number ofsimp$e inexpensive decoders is $arge The -.E/5s (ISO5s) approach to standardi

  • 7/23/2019 Mpeg Standards44444


    which means better designs can evo$ve and users have greater choice, because encoders of

    different $eve$s of cost and comp$exity can exist, yet a comp$iant decoder operates with a$$ of


    -.E/ a$so standardi

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    [edit] Standards

    The -.E/ standards consist of differentParts Eachpartcovers a certain aspect of the who$e

    specification!":#The standards a$so specifyProfilesandLevelsProfilesare intended to define a

    set of too$s that are avai$ab$e, andLevelsdefine the range of appropriate va$ues for the properties

    associated with them!";#Some of the approved -.E/ standards were revised by $ateramendments and6or new editions -.E/ has standardi


  • 7/23/2019 Mpeg Standards44444


    features.!''!'*!'/(e%eral ne& higher:eciency %ideo standards ;ne&er thanMPEG:' -ideo= are included, nota)ly>

    o MPEG:/ Part ';or (imple and d%anced (imple ProAle= and

    o MPEG:/ -+;or MPEG:/ Part #C or D.'2/=. MPEG:/ -+ may )e used

    on D9 9-9and lu:ray 9iscs, along &ith -+:#and MPEG:'.

    In addition, the fo$$owing standards, whi$e not se=uentia$ advances to the video encoding

    standard as with -.E/9" through -.E/91, are referred to by simi$ar notation>

    MPEG:3;'CC'=> Multimedia content description interface. ;?($@?E+ #0 Multimedia framework (M!G-"1#. ;?($@?E+ '#CCC= MPEGdescri)es this standard as a multimedia frameworkand pro%ides forintellectual property management and protection.

    -oreover, more recent$y than other standards above, -.E/ has started fo$$owing internationa$standards each of the standards ho$ds mu$tip$e -.E/ techno$ogies for a way of app$ication!+2#

    !+:#!+;#!+!+%#(For examp$e, -.E/93 inc$udes a number of techno$ogies on mu$timedia app$ication


    MPEG:;'CC3=> Multimedia application format (M!G-$#. ;?($@?E+ '*CCC=;e.g., Purpose for multimedia application formats,!*CMPEG music playerapplication format, MPEG photo player application format and others=

    MPEG:;'CC2=> M!G s%stems tec&nologies. ;?($@?E+ '*CC#= ;e.g., inaryMPEG format for ML,!*#Fragment 7e8uest Hnits, itstream (ynta69escription Language ;(9L= and others=

    MPEG:+;'CC2=> M!G video tec&nologies. ;?($@?E+ '*CC'= ;e.g., ccuracyre8uirements for implementation of integer:output 565 in%erse discretecosine transform!*'and others=

    MPEG:9;'CC3=> M!G audio tec&nologies. ;?($@?E+ '*CC*= ;e.g., MPEG(urround!**, ($+:(patial udio $)Iect +oding and H(+:HniAed (peech andudio +oding=

    MPEG:E;'CC3=> Multimedia Middleware. ;?($@?E+ '*CC/= ;a.k.a. M*W= ;e.g.,rchitecture, !*/Multimedia application programming interface ;P?=,

    +omponent model and others= 'upplemental media tec&nologies;'CC5=. ;?($@?E+ ' Media

    streaming application format protocols &ill )e re%ised in MPEG:M Part / :MPEG e6tensi)le middle&are ;MM= protocols.!*0

    MPEG:-;'C##=> Media contet and control. ;?($@?E+ '*CC0= ;a.k.a.?nformation e6change &ith -irtual Worlds= !*2!*3;e.g., %atar characteristics,(ensor information, rchitecture!*5!*

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    MPEG:M;'C#C=> M!G e)tensible Middleware (M)M#. ;?($@?E+ '*CC2= !/C!/#!/';e.g., MM architecture and technologies,!/*P?, MPEG e6tensi)le middle&are;MM= protocols!//=

    MPEG:H;'C#C=> *ic& media user interfaces. ;?($@?E+ '*CC3=!/0!/2;e.g.,Widgets=

    MPEG groups of standards!'2!'3!'5!/3!/5


    for a

    group of















    +oding of mo%ing

    pictures andassociated audio fordigital storage media.+ommonly limited toa)out #.0 M)it@salthough speciAcationis capa)le of muchhigher )it rates



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    MPEG:MPEG systemstechnologies



    MPEG:+MPEG %ideotechnologies



    MPEG:9 MPEG audiotechnologies






    ;none=(upplemental mediatechnologies


    PW? : Preliminary Work ?tem 4P or 4W?P : 4e& Proposal @ 4e& Work ?tem Proposal ;e.g., ?($@?E+ 4P '*CC3=

    W? : ppro%ed ne& Work ?tem ;e.g., ?($@?E+ W? #0///:#/=

    W9 : Working 9raft

    +9 : +ommittee 9raft ;e.g., ?($@?E+ +9 '*CCC:0=

    F+9 : Final +ommittee 9raft ;e.g., ?($@?E+ F+9 '*CCC:#'=

    9?( : 9raft ?nternational (tandard