Multimedia communications EG-371Dr Matt Roach

1
Multimedia CommunicationsEG 371

• Dr Matt Roach
• Lecture 3
• MPEG 7 standard

2
What is a standard

• An agreed way of working
• In-house / bespoke
• Industry standards
• International standards
• Definitions include
• What
• How

3
MPEG7

• MPEG
• Moving Pictures expert Group
• MPEG1, MPEG2, MPEG4, MPEG7
• Goals and objectives
• To address the management issues raised in
  lecture 2
• Scope
• Includes Standard description
• Does not include description production or
  description consumption
• mpeg.telecomitalialab.com/standards/mpeg-7/mpeg-7.
  htm

4
MPEG7
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MPEG7 Multimedia DS
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MPEG7 - Multimedia DS content description
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Segment DS

• Video segment
• Audio segment
• Still region
• Connected component

8
Segment DS

• Moving region
• Spatially and temporally connected

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Segment DS

• Hierarchical Search
• Tree structure
• Inherence
• Parent
• child

10
Segment DS

• Still region (SR)

11
Segment relation DS

• Video segments
• Graph structure
• Nodes
• segment
• Edges
• Relationship between two nodes

12
Segment relationship graph
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Semantic DS
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Semantic DS
15
Description definition language (DDL) adopts XML

• XML
• Extensible mark-up language
• Text based descriptive language
• Define your own tags
• XML does not do anything
• Example note in XML
• ltnotegt lttogtJoe Bloblt/togt ltfromgtMary Honkeylt/fromgt
  ltheadinggtReminderlt/headinggt ltbodygtDon't forget me
  this weekend!lt/bodygt lt/notegt