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Collecting onsite received signal strength (RSS) is commonly employed in RSS-based positioning systems to achieve more accurate estimations. However, it requires a time-consuming site survey and a great amount of manual efforts. This study proposes a novel approach to reduce the need of massive RSS collection by quantifying the importance of each RSS-measured location. The proposed approach, namely...
This paper presents a framework for ZigBee indoor positioning with an ensemble approach. This approach exploits the complementary advantages of various algorithms, weights the estimation results, and combines them to improve accuracy. This is achieved by dynamically analyzing the diverse patterns of inputs and combining base positioning algorithms with spatial dependent weights. The experiments were...
Ultrasound radiation force (USRF) is commonly used to facilitate the efficiency of targeted bubble adhesion. Studying the property of adherent bubbles provides opportunities for the further control of targeted drug delivery and release. Previous reports show that USRF provides better targeting efficiency as USRF transmitting frequency close to bubbles' resonance frequency. However, low-frequency ultrasound...
In this paper we focus on the design methodology to propose a design that is more flexible than ASIC solution and more efficient than the processor-based solution for H.264 video decoder. We explore the memory access bandwidth requirement and different software/hardware partitions so as to propose a configurable architecture adopting a DEM (Data Exchange Mechanism) controller to fit the best tradeoff...
In this paper we propose some optimization techniques to achieve the goal of real-time decoding of the new generation video such as VC-1, H.264, and AVS on embedded processors. We optimize the VC-1/H.264/AVS video decoders from a variety of viewpoints including algorithmic complexity reduction, memory access minimization, branch minimization, and zero skipping. We have reduced about 80% ~ 90% of complexity...
A proxy convertible authenticated encryption (CAE) scheme allows an original signer to delegate his signing power to a proxy signer such that the proxy signer can generate an authenticated ciphertext on behalf of the original signer. The generated authenticated ciphertext can only be decrypted and verified by the specific recipient instead of everyone else for the purpose of confidentiality. Integrating...
In this paper, we propose a joint algorithm/code-level optimization scheme to make it feasible to perform real-time H.264/AVC video decoding software on ARM-based platform for mobile multimedia applications. In the algorithm-level optimization, we propose various techniques like fast interpolation scheme, zero-skipping technique for texture decoding, fast boundary strength decision for in-loop filtering,...
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