1. Multimedia is a combination of text, art, sound, animation, and video.
What is Multimedia?
Multimedia is a combination of text, art, sound, animation, and video.
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2. Multimedia Components Simplified
Multimedia can be viewed as they combination of audio, video, data and how they interact with the user (more than the sum of the individual components)
Audio
Multimedia
Video
Data
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3. Forces Driving Communications That Facilitate Multimedia Communications
Evolution of communications and data networks
Increasing availability of almost unlimited bandwidth demand
Availability of ubiquitous access to the network
Ever increasing amount of memory and computational power
Sophisticated terminals
Digitization of virtually everything
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4. New Information System Paradigm
Integration
Multimedia
Integrated
Communication
Processing
Broadband Link
Workstation, PC
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5. Elements of Multimedia Systems
Two key communication modes
Person-to-person
Person-to-machine
Transport
Use
Interface
Processing
Storage and
Retrieval
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6. Multimedia Networks
The world has been wrapped in copper and glass fiber and can be viewed as a “hair ball” with physical, wireless and satellite entry/exit points.
Physical: LAN-WAN connections
Wireless: Cellular telephony, wireless PC connectivity
Satellite: INMARSAT, THURYA, ACeS etc
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7. Multimedia Communication Model
Partitioning of information objects into distinct types, e.g., text, audio, video
Standardization of service components per information type
Creation of platforms at two levels – network service and multimedia communication
Define general applications for multiple use in various multimedia environments
Define specific applications, e.g. e-commerce, tele-training, … using building blocks from platform and general applications
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8. Requirements User Requirements Network Requirements
Fast preparation and presentation
Dynamic control of multimedia applications
Intelligent support to users
Standardization
Network Requirements
High speed and variable bit rates
Multiple virtual connections using the same access
Synchronization of different information types
Suitable standardized services along with support
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9. ATM-BISDN and SS7 have enabled the switching based communications capabilities over the PSTN that support the necessary services
ATM-BISDN-SS7 will evolve to all optical “switchless” networks based on packet transfer
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10. Packet Transfer Concept
Allows voice, video and data to be dealt with in a common format
More flexible than circuit switching which it can emulate while allowing the multiplexing of varied bit rate data streams
Dynamic allocation of bandwidth
Handle Variable Bit Rate (VBR) directly
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11. Considerations
Buffering required for constant bit rate data such as audio
Re-sequencing and recovery capabilities must be provided over networks where packets may be received either in an order different from that transmitted or dropped
In an ATM network some packets can be dropped while others may not (i.e. voice vs bank transfer data packets)
Optimum packet lengths for voice video and data differ in an ATM network
IP packets over the internet may arrive in a different order or be dropped.
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12. Quality of Service (QoS)
The set of parameters that defines the properties of media streams Can define four QoS layers:
User QoS: Perception of the multimedia data at the user interface (“qualitative”)
Application QoS: Parameters such as end-to-end delay (“quantitative”)
System QoS: Requirements on the communications services derived from the application QoS
Network QoS: Parameters such as network load and performance
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13. Applications of Multimedia
Business - Business applications for multimedia include presentations training, marketing, advertising, product demos, databases, catalogues, instant messaging, and networked communication.
Schools - Educational software can be developed to enrich the learning process.
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14. Home - Most multimedia projects reach the homes via television sets or monitors with built-in user inputs.
Public places - Multimedia will become available at stand-alone terminals or kiosks to provide information and help.
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15. It can contain up to 80 minutes of full-screen video or sound.
CD-ROM is the most cost-effective distribution medium for multimedia projects.
It can contain up to 80 minutes of full-screen video or sound.
CD burners are used for reading discs and converting the discs to audio, video, and data formats.
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16. Digital Versatile Disc (DVD)
Multilayered DVD technology increases the capacity of current optical technology to 18 GB.
DVD authoring and integration software is used to create interactive front-end menus for films and games.
DVD burners are used for reading discs and converting the disc to audio, video, and data formats.
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17. Multimedia Communications
Multimedia communications is the delivery of multimedia to the user by electronic or digitally manipulated means.
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18. Multimedia Communications
Audio Communications
(Telephony, sound, Broadcast)
Multimedia
Communications
Video Communications
(Video telephony,
TV/HDTV)
Data, text, image
(Data Transfer, fax…)
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19. Multimedia Terms
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20. Alternative Types of Media used in Multimedia Applications
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21. Multimedia Networks and Their Services
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22. Multimedia Networks and Their Services
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