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Virtual Symphony Orchestra

Virtual Symphony Orchestra. System Design Review: Concurrency. Concurrent Processes. Video subsystem: Decompression of the video files Prefetching of video images Tracking subsystem: Image decompression Image processing Image analysis Audio subsystem:

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Virtual Symphony Orchestra

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  1. Virtual Symphony Orchestra System Design Review: Concurrency VSO – Virtual Symphony Orchestra | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

  2. Concurrent Processes • Video subsystem: • Decompression of the video files • Prefetching of video images • Tracking subsystem: • Image decompression • Image processing • Image analysis • Audio subsystem: • When compression is used, decompressing VSO | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

  3. Realization • Threaded programming • The program can use more than one CPU of a machine at the same time • Usage of different packages • Since the program is devided into subclasses and packages that are independent we are able to use more computers (grid computing) • Because of the observer pattern the program is easily scalable VSO | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

  4. Deployment Diagram :Server Orchestra Tracking :AudioClient :VideoClient Orchestra Orchestra Audioapplication Videoapplication VSO | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

  5. Possible Problems • Audioprocessing should take place on one local machine because it requires complete synchronization and there must not be any latency between the threads • An external timekeeper has to be established to oversee the synchronization of audio and video • If network traffic increases, the program can easily get out of sync VSO | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

  6. Possible Problems(2) • The threads of the tracking application have to be all ready before the gesture can be interpreted correctly • The computer on which the admin-view is running has to be able to playback all the videostreams at the same time (compressed videostreams) VSO | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

  7. Hardware- / Softwaremapping • We can have two computers that are providing the video data e.g. for video projectors VSO | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

  8. Possible other Scenarios There is a possible configuration with a conductor in one and several listeners in another room, enjoying a virtual trip through the orchestra VSO | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

  9. Thank you for your attention E-Mail: kern@in.tum.de VSO | System Design Review: Concurrency | Christian Klaus Kern <kern@in.tum.de>

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