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. msccomputerscience.com

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 msccomputerscience.com

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 msccomputerscience.com

New Information System Paradigm Integration Multimedia Integrated Communication Processing Broadband Link Workstation, PC msccomputerscience.com

Elements of Multimedia Systems Two key communication modes Person-to-person Person-to-machine Transport Use Interface Processing Storage and Retrieval msccomputerscience.com

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 msccomputerscience.com

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 msccomputerscience.com

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 msccomputerscience.com

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 msccomputerscience.com

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 msccomputerscience.com

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. msccomputerscience.com

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 msccomputerscience.com

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. msccomputerscience.com

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. msccomputerscience.com

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. msccomputerscience.com

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. msccomputerscience.com

Multimedia Communications Multimedia communications is the delivery of multimedia to the user by electronic or digitally manipulated means. msccomputerscience.com

Multimedia Communications Audio Communications (Telephony, sound, Broadcast) Multimedia Communications Video Communications (Video telephony, TV/HDTV) Data, text, image (Data Transfer, fax…) msccomputerscience.com

Multimedia Terms msccomputerscience.com

Alternative Types of Media used in Multimedia Applications msccomputerscience.com

Multimedia Networks and Their Services msccomputerscience.com

Multimedia Networks and Their Services msccomputerscience.com