Seminar Presentation Multimedia Audio Video Communication Standards

Seminar Presentation Multimedia Audio / Video Communication Standards Instructor: Dr. Imran Ahmad By: Ju Wang November 7, 2003 1

In this presentation …… o o There are many standards in multimedia world MPEG’s standards are well-known and are used everywhere This organization – Moving Picture Experts Group, was established in 1988 MPEG family’s standards…… 2

Outline o o o o MPEG – 1 MPEG – 2 MPEG – 4 MPEG – 7 MPEG – 21 A comparison of them Other standards 3

MPEG-1 o o o Code of moving pictures and associated audio for digital media at up to 1, 5 Mbit/s Became an international standard in 1993 Remarkable achievement 4

Why need MPEG-1 o o v CD-ROM enabled users to have hundreds of Megabyte storages Interactive video applications on CD 1. 5 Megabit/s was the transfer rate of CD at that time (single speed) 5

MPEG-1 brought us o Video CD o MP 3 – MPEG-1 Audio Layer 3 6

Five parts in MPEG-1 o Part 1 – the system Video decoder Digital Storage Medium specific decoder MPEG-1 system decoder MPEG-1 Stream Decoded Video Clock control Audio decoder Decoded Audio 7

Five parts in MPEG-1 o o Part 2, video Part 3, audio Part 4, testing Part 5, technique report for the implementation 8

Outline o MPEG – 1 o MPEG – 2 o o o MPEG – 4 MPEG – 7 MPEG – 21 A comparison of them Other standards 9

MPEG-2 o o Generic coding of moving pictures and associated audio information Started in 1990, became international standard in 1995 10

MPEG-2’s goal o Improve the audiovisual quality of MPEG-1 o Support digital TV o Compatible with MPEG-1 11

MPEG-2 brought us o o v DVD HDTV Because MPEG-2’s performance, the MPEG-3, whose goal was enabling HDTV, was abandoned 12

Ten parts in MPEG-2 o o o 1. System 2. Video 3. Audio 4, 5. correspond to those in MPEG-1 6. Digital Storage Media Command control 7. Advanced audio 13

10 Parts in MPEG-2 o o o 9. Real time interface for system decoder 10. Conformance test 11. IPMP in MPEG-2 14

MPEG-2 vs. MPEG-1 o Video quality n n o Audio quality n n o MPEG-1: VCD MPEG-2: DVD / DTV MPEG-1: two (stereo) MPEG-2: multichannel Bitrates n n MPEG-1: 0. 8 – 2 M MPEG-2: 2 – 8 M 15

Outline o MPEG – 1 MPEG – 2 o MPEG – 4 o o o MPEG – 7 MPEG – 21 A comparison of them Other standards 16

MPEG-4 o o Coding of audiovisual object Became international standard in 1998 (version 1) 17

MPEG-4’s goal o o Provide high quality audiovisual over a large range of bitrates Enable higher level of interaction with media content 18

MPEG-4’s scope o Satisfy the needs of n n n content authors service providers end users 19

MPEG-4’s feature o o Use “media object” to represent audiovisual content Facilitate content-based interaction Improve the video compression efficiency Work in a wide range of bitrate 64 kbps – 4 mbps 20

MPEG-4’s features o Provide robustness to information errors and loss, resolution scalability, and object scalability 21

MPEG-4’s applications o o o o Internet multimedia Interactive video game Interpersonal communication Interactive storage media Wireless multimedia Broadcasting applications And more… 22

Outline o MPEG – 1 MPEG – 2 MPEG – 4 o MPEG – 7 o o o MPEG – 21 A comparison of them Other standards 23

MPEG-7 o o Multimedia Content Description Interface Initiated in 1996, and became an international standard in 2002 24

MPEG-7’s goal o Search, access, filter, retrieve, and manage audiovisual information n n o o Digital multimedia spreads Transmission speeds increase and storage costs fall Allow higher interoperability Support a broad range of applications 25

MPEG-7’s Feature o Provide a set of audiovisual description tools n n n describe the “meaning” of the multimedia content The descriptions do not relay on the way the content is coded or stored This description can be passed to, or accessed by other tools or applications 26

MPEG-7’s feature o Allow different granularity in the description n n n Creation: author, title Usage: copyright Low level feature: color, texture Conceptual: event Collection of object Interaction: user preference 27

MPEG-7’s feature o The description can be extracted n n Automatically – only for some low level features, like color, textual Manually – for most high level features e. g. there are three persons in the scene 28

MPEG-7’s scope 29

MPEG-7’s main elements o Descriptive tools n n o o Descriptors Description schema Description definition language System tools 30

MPEG-7’s applications o o o Broadcast media selection Multimedia editing Home entertainments Multimedia searching, filter Much more… 31

Outline o MPEG o MPEG – 21 o o o – – 1 2 4 7 A comparison of them Other standards 32

MPEG-21 o o o Multimedia Framework Part 2 & 3 became international standard this year The rest of other parts are under developing 33

MPEG-21’s vision & goal o o Enable transparent and augmented use of multimedia resources across a wide range of network and devices to meet the needs for all users. Its goal is to describe a big picture of how different elements to build an infrastructure for delivery and consumption of multimedia content relate to each other. 34

MPEG-21’s framework o o o For all electronic creation, production, delivery and trade of content Seek existing standards where appropriate Based on two essential concepts: n n Digital items Users 35

MPEG-21’s digital items & Users o Digital Items n o Can be anything from an element piece content (a single picture), to a complete collection of audiovisual work Users n n Can be anyone, from authors, to vendors to end users Users are equal, in the sense that they all have their rights and interests in digital items 36

MPEG-21’s applications o o o Digital library Broadcast usage Multimedia publishing & release Trade transactions Much more… 37

Outline o MPEG MPEG o A comparison of them o Other standards o o – – – 1 2 4 7 21 38

A comparison MPEG Standard Targeted Usage MPEG-1 MPEG-2 MPEG-4 Coding of audio/visual content MPEG-7 Providing metadata that describes multimedia content MPEG-21 Providing a framework for the all-electronic creation, production, delivery and trade of content. Within the framework we can use the other MPEG standards where appropriate. 39

A comparison o o o MPEG-1/2/4 all aim at coding of audiovisual content MPEG-1/2 are frame-based, and MPEG-2 compatible with MPEG-1 MPEG-4 is media object-based 40

A comparison o o MPEG-7 will not replace the first three, it gives the contents ‘meaning’ by describing them MPEG-21 is much broader, dealing with units that consist of multiple resources 41

Outline o MPEG – 1 MPEG – 2 MPEG – 4 MPEG – 7 MPEG – 21 A comparison of them o Other standards o o o 42

Other standards o o o H. 242, by CCITT. H. 320, by CCITT Quick. Time, by Apple computer, Inc. RIFF, by Microsoft and IBM RTP Much more… 43

References o MPEG home page: http: //www. chiariglione. org/mpeg/ o MPEG-1: http: //www. chiariglione. org/mpeg/standards/mpeg-1. htm o MPEG-2: http: //www. chiariglione. org/mpeg/standards/mpeg-2. htm o MPEG-4: http: //www. chiariglione. org/mpeg/standards/mpeg-4. htm o MPEG-7: http: //www. chiariglione. org/mpeg/standards/mpeg-7. htm o MPEG-21: http: //www. chiariglione. org/mpeg/standards/mpeg-21. htm o From MPEG-1 to MPEG-21: Creating an Interoperable Multimedia Infrastructure: http: //www. chiariglione. org/mpeg/from_mpeg-1_to_mpeg-21. htm o Riding the Media Bits: http: //www. chiariglione. org/ride/ o ISO/IEC JTC 29 Programme of Work: http: //www. itscj. ipsj. or. jp/sc 29/29 w 42911. htm o Standards in multimedia: http: //cui. unige. ch/OSG/info/Multimedia. Info/mmsurvey/standards. html o MPEG-2 FAQ at Berkeley Multimedia Research Center: http: //bmrc. berkeley. edu/frame/research/mpeg 2 faq. html 44

The end o Thanks n n o To the organizations like MPEG To everyone here today Questions 45