11 - MulitimediaComputing OnlineLecture11...

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Mulitimedia Computing Online Lecture – 11 Learning Objectives: * Multimedia Operating  Systems Outline of Solutions to  Some problems Instructor-in-Charge Mukesh Kumar Rohil WILPD, BITS, Pilani Rajasthan March 15, 2010 EA ZC473 Multimedia Computing Online Lecture 11 1
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Chapter To be  Discussed From text book T2: Chapter 9  -  Multimedia Operating  Systems March 15, 2010 EA ZC473 Multimedia Computing Online Lecture 11 2
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March 15, 2010 EA ZC473 Multimedia Computing Online Lecture 12 3 Multimedia Operating System … QoS Scope of Quality of Service (QoS) in Multimedia  Systems
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Multimedia Operating Systems  (MMOS) Operating System (OS) is shield of computer  hardware against all software components OS Provides comfortable environment for  execution of programs OS ensures effective utilization of computer  hardware Integration of dicrete and continuous  multimedia data demands additional services March 15, 2010 EA ZC473 Multimedia Computing Online Lecture 11 4
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MMOS . ... Special  Requirements Real-time processing of continuous media data Also the tasks without timimg restrictions Resource reservation has to cover all the  resources on a data path from source to  destination Communication and Synchronization between  single processes, real-time timing restrictions  and timing relations among different media. Main  memory is available as shared resource Memory Management has to provide access to  data with a guaranteed timing delay and efficient  data manipulation March 15, 2010 EA ZC473 Multimedia Computing Online Lecture 11 5
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MMOS . ... Special Requirements . ..  2 Device Management – ideally addressing  of camera should be performed similar to  the addressing of a keyboard in the same  system Real-time scheduling algorithms must be  suitable and / or adaptive towards  continuous media processing. File system as an integral part of  multimedia system includes disk access  algorithms, data placement and structuring March 15, 2010 EA ZC473 Multimedia Computing Online Lecture 11 6
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MMOS . ... Real Time System  (RTS) Real time process – is process which  delivers the results of processing in a  given time-span Programs for processing of data must be  available during the entire run-time of the  system System must enforce externally defined  time-constraints External events may occur  deterministically or stochastically March 15, 2010 EA ZC473 Multimedia Computing Online Lecture 11 7
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MMOS . ... Real Time Systems. ..  2 Deadlines: soft deadlines (cannot be  exactly detrmined, may be missed  sometimes without causing system failure)  and hard deadlines, determined by the  physical characteristics of the system, and 
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11 - MulitimediaComputing OnlineLecture11...

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