Topic_5_FT - DISTRIBUTEDMULTIMEDIA SERVICES REALTIMESYSTEMS...

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DISTRIBUTED MULTIMEDIA  SERVICES  REAL-TIME SYSTEMS Presented by: Mads Slott Maarlev 40031702 Christian Kongsbak Refshauge 40031726 Yu Chin Hung (Lenno) 51249432 Wong Man Chung (Kevin) 51169550
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AGENDA Introduction Background Technical Issues Consequence of violating hard, soft and firm real- time systems. Multimedia issue. Distributed issue. Two video player issue.
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INTRODUCTION Exstensive use and higher demand. Eksampels on Distributed Multi-media Services. Internet telephony Video Conferencing Video on demand Requires carefully scheduling and data handling.  Eksampel Voice and Video in the use of skype.
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BACKGROUND Distributed Multimedia Services. Multimedia: ”An integrated digital medium combining several  media presented in an interactive manner”. The main task is to combine f. example individual  audio and video samples generated and consumed in  real time due to an externally determined schedule.
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BACKGROUND Real-Time Services: A service that is said to occur immediately, and without  the any noticeable delay for the user,  it is said to be  real time. Requirements when working with real-time  systems: Timeliness.  Simultaneity or simultaneous processing. Predictability. Dependability or trustworthiness.
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BACKGROUND. Different of systems: Soft-real-time. Allow a certain amount of latency. Online streaming of football matches. Firm-real-time  Allowed to crose a certain amount of deadlines,before  system terminates A automobile navigation system.  Hard realtime service. No latency what so ever I allowed. The flight surveillance system air traffic control  tower.
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REAL-TIME ISSUE
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CONSEQUENCE OF VIOLATING HARD,  SOFT AND FIRM REAL-TIME SYSTEMS soft real-time  system is one in which performance is  degraded but not destroyed by failure to meet response- time constraints.  hard real-time  system is one in which failure to 
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Topic_5_FT - DISTRIBUTEDMULTIMEDIA SERVICES REALTIMESYSTEMS...

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