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With the popularity of high-efficiency video coding (HEVC) standard, a video server usually transcodes a video stream to HEVC for its higher compression ratio. In this paper, a fast H.264/advanced video coding (AVC) to HEVC transcoding method is proposed. In the HEVC encoding procedure, a coding unit (CU), which is a motion-homogeneous block, is first checked based on the analysis of the decoded information...
An Internet-based security monitoring platform including a server and some clients is described in this paper for multimedia content authentication. Contents existed in the database of the server, can be discovered by the video hash copy detection technology and will be prevented from uploading. Watermark can be embedded into the videos when they are uploaded to the server in order to protect the...
Recently, Khan et al. showed that Wang et al.'s dynamic ID-based remote user authentication scheme is not feasible for real-life implementations such as without preserving anonymity of a user during authentication, user cannot choose the password he/she wants, no provision for revocation of lost or stolen smart card, and can not provide session key agreement. Consequently, an improved version of dynamic...
In this paper, we describe a probability model to analyze the effect of neighbor number size based on two performance metrics: video quality and distribution delay. Some simulation is done to prove the theory model. The theoretical analysis and the simulation both show that increasing the neighbor number size does little to the system video quality when the buffer size is large enough, but can reduce...
This paper presents an effective network-aware peer selection algorithm to alleviate the topology mismatch issue in BitTorrent. By utilizing the characteristic of hierarchical network topology, the Tracker in BitTorrent classifies the peers into three clusters: local, intra-ISP and inter-ISP clusters based on peers' traceroute results, and then chooses close peers within the first two clusters. Thus,...
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