MPEG4 presentation

1
MPEG4 presentation

• MPEG past, present future
• Technical information
• Implementation

2
MPEG1

• Coding of moving pictures and associated audio
  for digital storage media at up to about 1,5
  Mbit/s
• Examples VCD MP3

3
MPEG2

• Generic Coding of Moving Pictures and Associated
  Audio
• Coding at 1.5 15MBit/s
• Examples Camcorders, homevideo equipment, DVDs

4
MPEG3

• Designed for HDTV
• Incorporated in MPEG2, standard abandoned

5
Usage areas

• Mobile devices
• Low bit-rate
• Studio use
• High bit-rate
• On the web
• High and low bit-rate
• Games

6
Technical information

• Objects are organized in a hierarchal fashion.
• Each object has its own description element.
• Allows handling of the object

7
Technical information

• One or more primitive media objects can be
  combined.
• Techniques from the Virtual Reality model
  language.

Compound media object
Voice
Talking person
Background
Image
Primitive media objects
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Video objects

• Divide video components
• Person and background
• Camera position information

9
Media streams

• One or more media streams
• Descriptors for the objects and the stream.

Media stream
Decompression
Composition
Scene description
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Scene description

• How to group the objects
• Directed acyclic graph
• How to position the objects
• Special attributes

Scene
Room
Person




11
Future MPEG standards

• MPEG7
• Multimedia content description interface
• Aim to create standard for describing the
  multimedia content data
• MPEG21
• Multimedia Framework
• identify and define the key elements needed to
  support the multimedia delivery chain

12
MPEG relations
MPEG2
MPEG1
MPEG2
MPEG4
MPEG7
13
Implementation

• Divx -)
• 3ivx
• Opendivx