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?????? MPEG

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MPEG Moving Picture Experts Group ( ) – PowerPoint PPT presentation

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Title: ?????? MPEG


1
?????? MPEG
  • Moving Picture Experts Group
  • ???????
  • ????? ???
  • ??? ???(???)

2
outline
  • MPEG?????
  • MPEG??
  • MPEG-1,2,3 ??
  • MPEG-4 ????????
  • MPEG-7 ?????????
  • ????????
  • MPEG-21 ???REL???
  • References ????

3
What is MPEG?
  • MPEG (pronounced M-peg), which stands for Moving
    Picture Experts Group, is the name of a family of
    standards used for coding audio-visual
    information (e.g., movies, video, music) in a
    digital compressed format.
  • Moving Picture Experts Group???????????,???1988?,
    ???????CD??????????,????????????????????,???????
    ??MPEG?

4
The major advantage of MPEG
  • MPEG files are much smaller for the same quality.
    This is because MPEG uses very sophisticated
    compression techniques
  • ??????,???????,????????

5
MPEG Families
  • MPEG-1 CD-ROM,Video-CD,CD-I
  • MPEG-2 DVB , HDTV , DVD
  • MPEG-3 (??MPEG-2??)
  • MPEG-4 ???????????????????
  • ????(WWW)
  • MPEG-7 ????????,?????Meta
  • MPEG-21 ?????,?????,????????
  • ???????
  • MPEG-X ISO/IEC???MPEG-x????????,
  • MPEG-1?MPEG-2?MPEG-4?
    ITU-T??
  • ?????????,?H.26X?????,
  • ??,H.261?H.262?H.263?H.26
    L)?

6
MPEG-1(ISO/IEC 11172 )
  • ??- 1992?
  • ??- CD-ROM,Video-CD,CD-I?
  • ??-?221Mbits/sec?NTSC?????1.2Mbits/sec,?????2001?
    ????????4-5 Mbits /sec,????????,??????????????

7
MPEG-2(ISO/IEC 13818)
  • ??- 1994?
  • ??- DVB?HDTV?DVD????3Mbps-10Mbps??????????????
  • ????- CCIR6OI??(????????????????????)
  • ??- ?????????????,?????????,???7?????(?DVD??8?????
    ???)?

8
MPEG-3(MPEG-1 Audio Layer 3 )
  • ?????20Mbits-40Mbits/sec?
  • MPEG-2???????,?????HDTV,??????HDTV???MPEG-3,??????
    ????

9
MPEG-4(ISO/IEC 14496)
  • ????? 1998, ?????in 1999
  • ??????
  • Digital television
  • Interactive graphics applications (synthetic
  • content)
  • Interactive multimedia (World Wide Web,
    distribution of and access to content)

10
MPEG-4 ??(1)
  • ???? (visual scene)
  • ?????????????,?????????????????????,?????????????
    ?

11
MPEG-4 ??(2)
  • ???????????????????,??????????
  • ?????? (Visual Object Sequence,??VS)
  • ???? (Video Object,??VO)
  • ????? (Video Object Layer,??VOL)
  • ??????? (Group of Video Object Planes,??GOV)
  • ?????? (Video Object Planes,??VOP)

12
MPEG-4 ??
  • ???????,??????????????????,????/???????3D?????????
    ????????
  • ??????????????????????????(WWW)??
  • ???????,???4800-64000bits/sec??
  • ???????,??frame??????????,??????????????????

13
????,???????.htm
14
???????31??5?,1998?5?
15
???????????,???????????,??????????????
  • MPEG-1?MPEG-2?MPEG-4

16
Where are MPEG-5 , -6?
  • Early on in MPEG's work, the numbers 5 and 6 were
    not assigned to work items, an official term for
    current and future projects. After starting such
    a new work item, the questions had logic of a
    sort "shall the number for the
  • next job be 5, which follows 4, or should it
    be 8, attractive in its own binary way, to follow
    1,2 and 4?"
  • After some thought, MPEG members decided that
    their new work item was so different from what
    had gone before that they threw both ideas
    overboard and chose 7 as the lucky number (poor 6
    never had a chance). --R.K.

IEEE Spectrum February 1999 Volume 36 Number
2 http//www.m4if.org/resources/IEEESpectrum/mpegs
b2.htm
17
MPEG-7 (ISO/IEC 15938) ??
  • July 2001??
  • ?????multimedia content description interface
  • ?????Dublin Core????
  • ??XML???????????,
  • ?XML Schema??DDL(Description Definition
    Language)????
  • ?????????????,???????????????????????????????????

18
MPEG-7 (ISO/IEC 15938)??
  • ????????????,?
  • ??????????????
  • ???????????????
  • ???????

19
MPEG-7??
  • XML???,??????????????
  • ??(binary)??,??????????streaming delivery??

20
MPEG-7 ????
  • ????(Description tools)
  • Descriptors(D)?????????????????
  • Description Schemes(DS)??D?D???D?DS???DS?DS??????
    ???
  • Description Definition Language(DDL)?????????(Des
    cription tools)?
  • ????(System tools)????????, ??????????????,?????
    ????????,????????????

21
MPEG-7 DSs
  • DSs????????????????,?regions?segments?objects?even
    ts??,??????metadata???????????????????,????D?D?D?D
    S?DS?DS?????????,??DSs???????????(audio)???(visual
    )DSs?????????????,?Multimedia DSs???????(????????)
    ???????????DSs???????????,??????DSs????????????

22
MPEG-7 Multimedia Description Schemes(MDS)
  • ???????(audio-visual)??metadata???,???????????????
    ???????????
  • Descriptors-???????????????????,??????????????????
    ??

23
MPEG-7 MDS??????
  • Basic Elements????
  • Content Description????
  • Content Management????
  • Content Organization????
  • Navigation and Access?????
  • User Interaction?????

24
Overview of the MPEG-7 Multimedia DSs
25
MPEG-7 DDL??????
  • 1.XML Schema structural language components
  • 2.XML Schema datatype language components
  • 3.MPEG-7 specific extensions
  • Array and matrix datatypes ????????
  • ?????
  • Built-in primitive time datatypes ?????
  • ?????

26
MPEG-7 main elements
27
(No Transcript)
28
Description unit
29
Abstract representation of possible applications
using MPEG-7
30
MPEG-7 ????
31
MPEG-7 ????
  • ????????????(??????)?
  • ???????????(?????????????)?
  • ???????????(?????????)?
  • ????????????????????(Segmentation in
    regions,region motion tracking)?
  • ??????????(????????)?
  • ?????????????(Object?Event)?
  • ???????????(?????)?
  • ???????
  • ????????????(???????????)?

32
Example of a Hierarchical Summary of a video of a
soccer game providing a multiple level key-frame
hierarchy. The Hierarchical Summary denotes the
fidelity (i.e., f0, f1) of each key-frame with
respect to the video segment referred to by the
key-frames at the next lower level.
33
MPEG-7???
  • ????????????
  • ????MPEG-7 ????????,??????????????????????
    MPEG-7 ?????????????

34
MPEG-21(ISO/IEC 21000 )
  • started at the May-June 2000 meeting in Geneva
  • MPEG-21???????????????????(Scalable Video Coding
    SVC)????UMA(Universal Multimedia Access
    )???,??????????Part 13 Scalable Video Coding????
  • 2005?1??MPEG?????????,??MPEG-21
    SVC?????HHI?H.264-based SVC????????
  • ??????????????

35
REL(Rights Expression Language)
  • ?MPEG-21????, ???????????, ??XrML??????????XrML?XM
    L???Right????

36
The REL Data Model
MPEG-21 Overview v.5 http//www.chiariglione.org/m
peg/standards/mpeg-21/mpeg-21.htm
37
MPEG REL????
??????110?,12.25.2004,42
38
? MPEG-21 ???
  • ????????????
  • ????????
  • ???? ???????? ????(????) ????(????)
    ??????????(?????) ?????????? ??/????(?????)
    ???????? ??,??,??,??????? ??????? ??????
    ?????

39
????
  • ???(2002)?MPEG-7?????????????????????????????
  • ??(2005)? MPEG-7??????????????,2,48-52?
  • ??(2007)?????????MPEG???????? 6,90-91?
  • Paul Fernandez, Mark Nadeski and Gene
    Lin(2003)?????????MPEG-4 ??????http//www.ti.com.t
    w/articles/detail.asp?sno16catalog2
  • ???????????(2002)???????????????????100,52-58?

40
????
  • ???? ???????????????(2004)???????????????????????,
    110,40-52?
  • ???(1998)???????????-MP3 ???????,31(5),33-35?
  • IT???????
  • http//www.sina.com.cn
  • http//www.mpeg.org/
  • http//www.chiariglione.org/mpeg
  • MPEG www.hoyo.idv.tw/data/mpeg.htm
  • http//www.eetchina.com/ART_8800307907_675277_TA_a
    1ab654d.HTM
  • http//www.hope.com.tw/Art/Show2.asp?O20031205115
    4363711
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