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Scalable Video Coding (SVC) is an extension of H.264/AVC, aiming to provide the ability to adapt to heterogeneous environments. It offers great flexibility for bitstream adaptation in multi-point applications such as videoconferencing. However, transcoding between SVC and AVC is necessary due to the existence of legacy AVC-based systems. This paper proposes a 3-stage fast SVC-to-AVC transcoder for...
H.264 video codec system requires big capacity of Frame Store (FS) for buffering reference frames. The up-to-date Phase-change Random Access Memory (PRAM) is the promising approach for on-chip caching the reference signals, as PRAM offers the advantages in terms of high density and low leakage power. However, the write endurance problem, that is a PRAM cell can only tolerant limited number of write...
Orthogonal frequency division multiplexing (OFDM) is one of the key technologies adopted in modern communication systems. However, it suffers from high peak-to-average power ratio (PAPR) problem, which limits the efficiency of the power amplifier (PA). This paper presents a novel PAPR reduction method for amplitude phase shift keying (APSK) modulation. The amplitude of the transmit signal in time...
This paper outlines a method that can be used for field reliability prediction using degradation data and environmental data. From different perspectives about the effects of dynamic environment on field reliability, we proposed two methods to relate the environmental variables to degradation process. The modeling technique and estimation method are illustrated by an example to predict the field failure...
Transformer diagnosis methods have been introduced and employed to recognize transformer internal defects since many years ago. In terms of mechanical defects in transformers, turn to turn and disc to disc short circuits in transformer windings are considered as one of the main problems in transformer active part. On the other hand, Frequency Response Analysis (FRA) is considered as a robust, sensitive...
Aimed at the industrial sorting technology problems, this paper researched correlative algorithm of image processing and analysis, and completed the construction of robot vision sense. the operational process was described as follows: the camera acquired image sequences of the metal work piece in the sorting region. Image sequence was analyzed to use algorithms of image pre-processing, Hough circle...
XML can exchange data between the heterogeneous databases and different operating systems. The data can be displayed in multiple forms, because its content and style is separated. The method to transforming relational data into XML documents and display it as requried using ADO.NET and XSL technology in .NET Framework is studied in this paper.
There are a lot of high-risk career cause people to lose their property and lives. As a teacher, we must take a variety of teaching method to improve teaching effectiveness, to ensure the safety of production and life. Ammunition technical supporting work is one of high-risk career. In order to heighten the safety consciousness of the non-commissioned officer students, we obtained the good teaching...
Mild cognitive impairment (MCI) was recognized as the prodromal stage of Alzheimer's disease (AD). Recent neuroimaging studies have shown that the cognitive and memory decline in AD and MCI patients is coupled with abnormal functions of focal brain regions and disrupted functional connectivity between distinct brain regions, as well as losses of small-world attributes. However, the causal interactions...
Phase-change Random Access Memory (PRAM) is one of the most promising technologies among emerging non-volatile memory technologies, which provides many benefits, such as high density, non-volatility and low leakage power. However, the limited write endurance of PRAM prevents it from being used as a drop-in replacement of SRAM cache. Moreover, the inherent high latency and power dissipation of write...
This paper studies the test and evaluation methods for parallel application in high-performance computers. The parallel performance of specific application could be attributed to its multiple application parameters. The basic test methods are proposed for application evaluation. The test results are analyzed to achieve application performance further. Finally, performance results are analyzed through...
This paper is focused on the research of instruction scheduling technology for clustered VLIW architecture. A novel scheduling technology is presented in this work, which exploits the tradeoff between the balancing of distribution of instructions amongst clusters and reduction of the amount of inter-cluster data communications, and guides the cluster assign and cycle schedule of instructions by estimating...
The wireless sensor network (WSN) is one new hot spot for both research and industry. However, the energy problem has been becoming a challenge in practical applications for WSN because the sensor nodes are supplied with energy by batteries which are difficult to be recharged and replaced. So many researches are taken on reducing the energy consumption of WSN nodes. Medium Access Control (MAC) layer...
Two existing DFT/FFT algorithms and a new prime-point Fast Fourier Transform algorithm are implemented with different serial and parallel processors. The evaluation results show that previous multiplication computational cost criterion is no longer applicable to the current parallel implementation. Total computational cost including add/subtract operation is one of the key factors affecting the speed...
This paper presents a high-throughput and size efficient buffer design method for an application specific NoC. The method firstly configures on chip buffer according with the mapping position of IP and the routing path of communication pairs, then computes the minimum value of buffer's size under NoC performance guarantee. Under the same buffer size, the experiments show that the method results in...
The wireless sensor network is one new hot spot for both research and industry. Currently several communication protocols have been developed for wireless sensor network, including Zigbee, wirelessHART, ISA100.11a, WIA-PA, and so on. Most of these protocols are developed based on IEEE 802.15.4. IEEE 802.15.4 was designed for low-cost and low-power wireless network which provides MAC layer and physical...
Low-rate wireless personal network (LR-WPAN) is an emerging networking technique that was obtained more and more attention for its power efficient and low data rate applications. In this paper, we give a brief overview of WPAN and wireless senor network (WSN) protocols. Then, we focus on IEEE 802.15.4 which is the fundamental of many LR-WPAN protocols. Finally, we set up a simple experiment based...
New challenges for large-scale data management and sharing have arisen due to the information evolution from massive data to "big data". Domain Scientific Data Cloud (DSDC) based on virtual data space is proposed in this paper to solve the problems of "big data" management, reusability and service in scientific field. The application of DSDC (MSDC) is also introduced, which is...
The traditional database is designed for the structured data and the complex query. In the environment of the cloud, the scale of data is very large, the data is non-structured, the request of the data is dynamic, these characteristics raise new challenges for the data's storage and administration, in this context, the NoSQL database comes into being. The article compares and analyzes the general...
So far it is still difficult to remove random-valued impulse noise excellently at any noise level for any image. In this paper, we present a novel robust two-phase denoising scheme based on smooth and texture region separation. In the first phase, all pixels are classified into two groups by using cascade window filtering: the smooth region pixels and the texture region pixels. Then we identify pixels...
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