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首页> 外文期刊>International Journal of Information Technology and Computer Science >Video Quality Analysis of Distributed Video Coding in Wireless Multimedia Sensor Networks
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Video Quality Analysis of Distributed Video Coding in Wireless Multimedia Sensor Networks

机译：无线多媒体传感器网络中分布式视频编码的视频质量分析

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摘要

Multimedia communications in wireless sensor networks is a very challenging task. Video coding with high computational complexity and great contribution to the energy consumption of nodes and video transmission over erroneous wireless channel are the main reasons of these challenges. Distributed Video Coding has high potential for being deployed in these networks due to its unique features like as independent frame coding and low complexity encoding operations. The purpose of this study is to understand and evaluate the distributed video coding performance facing the transmission characteristics in wireless multimedia sensor networks. To this end, the comparative analysis of the coding in respect of main factors of video transmission (i.e., bit rate and error resiliency) in the Wireless Multimedia Sensor Networks (WMSN) has been done. We have used both the objective and subjective criteria for checking the video quality and applied the Gilbert-Elliot channel model for capturing the bit-level error in WMSN. Therefore, unlike previous works, our results are more realistic. In addition, based on this model we have investigated the impact of protection of frames by Reed-Solomon error control scheme. The results show that paying attention to coding parameters and protecting key frames, have a great impact on increasing the quality of the receiving video and will reduce the energy consumption and delays due to low number of requests from the feedback channel.
机译：无线传感器网络中的多媒体通信是一项非常具有挑战性的任务。这些挑战的主要原因是，具有很高的计算复杂度并且对节点的能耗有很大贡献的视频编码以及通过错误的无线信道进行视频传输。分布式视频编码由于其独特的功能（例如独立的帧编码和低复杂度的编码操作）而具有在这些网络中部署的巨大潜力。这项研究的目的是了解和评估面向无线多媒体传感器网络中传输特性的分布式视频编码性能。为此，已经完成了关于无线多媒体传感器网络（WMSN）中视频传输的主要因素（即，比特率和差错弹性）的编码的比较分析。我们已经使用了客观和主观标准来检查视频质量，并使用Gi​​lbert-Elliot信道模型来捕获WMSN中的比特级错误。因此，与以前的作品不同，我们的结果更加真实。此外，基于此模型，我们研究了Reed-Solomon错误控制方案对帧保护的影响。结果表明，注意编码参数和保护关键帧，对于提高接收视频的质量有很大影响，并且由于来自反馈通道的请求数量少，将减少能耗和延迟。

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