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低码率应用中的一种视频码率控制方法 被引量:1
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作者 唐田野 于鸿洋 刘钊 《信号处理》 CSCD 北大核心 2006年第6期920-923,共4页
针对低码率视频应用,该文根据信源的线性模型,在满足码率约束的条件下,提出一种使宏块量化参数集中的优化策略。通过该方法,可以使宏块失真度分布更加集中,图像质量更加均匀,更符合人眼视觉特性;同时减少了编码码流中用于表征宏块间量... 针对低码率视频应用,该文根据信源的线性模型,在满足码率约束的条件下,提出一种使宏块量化参数集中的优化策略。通过该方法,可以使宏块失真度分布更加集中,图像质量更加均匀,更符合人眼视觉特性;同时减少了编码码流中用于表征宏块间量化参数变化的句法比特数。仿真表明,在低码率及甚低码率的视频应用中,该方法能改善主客观视觉质量。 展开更多
关键词 低码率 码率控制 信源线性模型
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An analysis of large-scale wireless sensor networks with energy-saving problem
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作者 Lina Yuan Jing Gong 《International Journal of Technology Management》 2014年第8期109-111,共3页
Energy saving is the nature of the optimal balance between the optimization of performance and energy consumption.Due to the node' s mobility of large-scale wireless sensor networks and the depletion of electrical en... Energy saving is the nature of the optimal balance between the optimization of performance and energy consumption.Due to the node' s mobility of large-scale wireless sensor networks and the depletion of electrical energy causing the failure of communication path and network segmentation mong nodes,and because energy consumption of nodes is mainly its communication, to design the routing with energy saving, low latency, extensibility and improving the fault-tolerance is particularly important.Based on the large-scale wireless sensor networks,mainly through introducing the methods of nonlinear modeling,this paper analyzes the fine-grained mapping between the system of energy consumption and software, builds and optimizes the software model of energy consumption and energy consumption-balance model of service quality, and commits to form an effective energy saving to lay a foundation for construction of low energy consumption of wireless sensor network. Research achievement has significant theoretical and application value in public safety, disaster prevention, ecological and environmental protection, urban management, smart home, intelligent transportation, medical and health care, industrial monitoring, green agriculture and other fields. 展开更多
关键词 wireless sensor networks(WSNs) energy saving balance model of service quality.
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