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۱An Efficient Hardware Implementation for H.264 Binary Arithmetic Encoder
نویسنده(ها): ،
اطلاعات انتشار: چهاردهمین کنفرانس بین المللی سالانه انجمن کامپیوتر ایران، سال
تعداد صفحات: ۵
Binary Arithmetic Coding (BAC) is among the techniques used in H.264 video coding standard to improve the coding efficiency. BAC includes an iterative process of renormalization with up to seven iterations for coding each symbol. Since BAC is also a computational intensive unit in H.264 encoder, various hardware realizations have been proposed for it in the literature. In this paper, we propose a hardware implementation for BAC, which uses lookup table to avoid the iterative coding process and achieves coding rate of one symbol per clock at 260 MHz clock rate. Post synthesize simulation results indicate that the proposed architecture is a resource and speed efficient hardware for H.264 binary arithmetic encoder.<\div>

۲Comparing The Benefits of Controlled Sink Mobility with Random, Predictable and Geographic Mobility in Wireless Sensor Networks
نویسنده(ها): ،
اطلاعات انتشار: کنفرانس بین المللی علوم و مهندسی، سال
تعداد صفحات: ۶
Todays, the use of high speed network communications as well as power, simplicity and low cost have been presented as a new approach in many scientific researches.Wireless sensor networks consist of a large number of low–cost and small size sensor nodes, which can be embedded in environments in order to accomplish a specific mission by measuring specific parameters such as pressure or temperature. In Recent research, sink mobility in wireless sensor networks can be divided into two main categories: static and dynamic sink movement whereas the speed of the network can be controlled or random or predictable or geographic. In this article, we discuss these methods and do count the advantages and disadvantages of each methods.The rest of this paper is organized as follows. In section1 discuss about wireless sensor networks and its limitations and the importance of mobility models. After that, mobility models are reviewed and classified in section 2. Also, a discussion regarding the studied mobility models is presented. Finally, the paper is concluded in the last section.<\div>
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