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Title:
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GRACEFUL DEGRADATION OF MOBILE VIDEO QUALITY OVER WIRELESS NETWORK |
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Author(s):
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Hussein Muzahim Aziz , Lars Lundberg |
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ISBN:
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978-972-8924-86-7 |
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Editors:
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Hans Weghorn, Jörg Roth and Pedro Isaías |
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Year:
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2009 |
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Edition:
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Single |
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Keywords:
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Streaming video, duplicate frames, multichannel, dropping rate, switching stream and MOS. |
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Type:
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Short Paper |
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First Page:
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175 |
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Last Page:
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180 |
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Language:
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English |
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Cover:
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Full Contents:
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click to dowload 
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Paper Abstract:
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Real-time video transmission over wireless channels has become an important topic in wireless communication because
of the limited bandwidth of wireless network that should handle high amount of video frames. Video frames must arrive
at the client before the playout time with enough time to display the contents of the frames. Real-time video transmission
is particularly sensitive to delay as it has a strict bounded end-to-end delay constraint; video applications impose stringent
requirements on communication parameters, such as frame lost and frame dropped due to excessive delay are the primary
factors affecting the user-perceived quality. In this study we investigate ways of obtaining a graceful and controlled
degradation of the quality, by introducing redundancy in the frame sequence and compensating this by limiting colour
coding and resolution. The effect of that is to use double streaming mechanism, in this way we will obtain less freezing at
the expense of limited colours and resolution. Our experiments, applied to scenarios where users can observe three types
of dropping load for real time video streaming, the analytical measurements tools are used in this study to evaluate the
video quality is the mean opinion score and we will demonstrate this and argue that the proposed technique improves the
use perceived of the video quality. |
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