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2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)最新文献

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Study of multistage digital oscilloscope trigger circuit 多级数字示波器触发电路的研究
Shotaro Sakurai, Seiya Takigami, Takashi Ida, Yuki Ozawa, N. Tsukiji, Y. Kobori, Haruo Kobayashi, Ryoji Shiota
This paper describes a general equation of the input and output relation in N-stage configuration of a trigger circuit, which outputs a sine wave (or a cosine wave) with a zero phase at the timing when a trigger signal input is applied. Its conventional configuration employs two or three stages of a track hold circuit and an analog multiplier with some glue circuits, and it is targeted for a digital oscilloscope. Our N-stage trigger circuit can average non-ideal characteristics of each phase with N stages, and it is expected that a high precision trigger circuit can be realized. This may lead to analog circuit realization with low supply voltage; in other words, each analog circuit is not precise but the whole trigger circuit is precise. Also, its application as a pre-stage of the successive approximation time-to-digital converter for one-shot timing measurement is proposed.
本文给出了n级触发电路输入输出关系的一般公式,当触发信号输入时,n级触发电路输出一个相位为零的正弦波(或余弦波)。它的传统配置采用两到三级轨道保持电路和模拟乘法器与一些胶电路,它是针对数字示波器。我们的N级触发电路可以用N级平均每相的非理想特性,有望实现高精度的触发电路。这可能导致模拟电路在低电源电压下实现;换句话说,每个模拟电路不是精确的,但整个触发电路是精确的。此外,还提出了将其作为连续近似时间-数字转换器的前置级用于单次定时测量。
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引用次数: 0
A Region Histogram of Oriented Optical Flow (RHOOF) feature for apex frame spotting in micro-expression 面向光流区域直方图(RHOOF)特征在微表情顶点框定位中的应用
Haoyuan Ma, Gaoyun An, Shengjie Wu, Feng Yang
Micro-expressions are the momentary facial expressions that reveal genuine emotional state of people. However, the detection and recognition of micro-expression have been greatly challenging. The apex frame which indicates the most expressive state of a micro-expression will be very helpful for further research on micro-expression. But labeling the apex frame manually is very time-consuming. In this paper, we propose a novel Region Histogram of Oriented Optical Flow (RHOOF) feature to spot the apex frame automatically. First, a set of facial landmarks are detected and then 5 Regions Of Interest (ROIs) are selected from facial region based on the frequency of occurrence of action units. Finally, we extract optical flow fields frame-by-frame and compute HOOF in these ROIs. Experiments are conducted on two ideal spontaneous micro-expression databases, i.e., CASME and CASME II. Improvements of 30.77% and 19.04% are achieved respectively in CASME and CASME II when compared to the BS-RoIs.
微表情是反映人们真实情绪状态的瞬间面部表情。然而,微表情的检测和识别一直是一个巨大的挑战。显示微表情最具表现力状态的顶点框架将有助于进一步研究微表情。但是手工标记顶点架非常耗时。本文提出了一种新的定向光流区域直方图(RHOOF)特征来自动识别顶点框架。首先,检测一组面部标志,然后根据动作单元出现的频率从面部区域中选择5个感兴趣区域(roi)。最后,我们逐帧提取光流场,并计算这些roi中的蹄度。在两个理想的自发微表情数据库CASME和CASME II上进行了实验。与BS-RoIs相比,CASME和CASME II分别改善了30.77%和19.04%。
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引用次数: 23
A parameterized wifi fingerprint database construction method 一种参数化wifi指纹数据库构建方法
Tian Sun, Ao Peng, Biyu Tang, Lingxiang Zheng, Hao Li, G. Ou
In Wi-Fi fingerprinting localization system, good positioning accuracy requires accurate fingerprint database, but too much heavy labor was involved in the collection of accurate fingerprint. Therefore, the collection, calibration and maintenance of fingerprint database in Wi-Fi positioning has always been one of the research hotspots. In this paper, a parameterized fingerprint construction system is proposed to obtain an accurate fingerprint database, and the collection and periodic maintenance of fingerprints is relatively efficient. In the proposed scheme, Wi-Fi signal collected in actual environment and wireless signal propagation theory is used to model APs in the interested area by using the least squares fitting method to construct a fingerprint database which matches the surrounding environment. At the end of the paper, an experiment was carried out at Haiyun teaching building of Xiamen University. Compared with the original fingerprints, the positioning accuracy of optimized fingerprints obtained by the proposed scheme is improved by 48%.
在Wi-Fi指纹定位系统中,良好的定位精度需要准确的指纹数据库,但采集准确的指纹需要耗费大量的人力。因此,Wi-Fi定位中指纹库的采集、校准和维护一直是研究热点之一。本文提出了一种参数化指纹构建系统,以获得准确的指纹数据库,指纹的采集和定期维护相对高效。该方案利用实际环境中采集到的Wi-Fi信号,结合无线信号传播理论对感兴趣区域内的ap进行建模,采用最小二乘拟合方法构建与周围环境相匹配的指纹数据库。最后,在厦门大学海云教学楼进行了实验。与原始指纹相比,优化后的指纹定位精度提高了48%。
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引用次数: 1
Multiple description coding for multi-view video with adaptive redundancy allocation 基于自适应冗余分配的多视点视频多描述编码
J. Chen, Jie Liao, H. Zeng, C. Cai
To meet the requirement of robust multi-view video transmission through error prone channels, a multi-view multiple description video coding scheme with adaptive redundancy allocation strategy is proposed in this paper. The redundancy of the codec can be adaptively adjusted according to different packet loss circumstances of the network. The effectiveness and robustness of the proposed multiple description coding scheme for multi-view video is verified by experiments on the JMVC coding platform.
为了满足多视点视频在易出错信道上的鲁棒传输需求,提出了一种具有自适应冗余分配策略的多视点多描述视频编码方案。编解码器的冗余度可以根据网络的不同丢包情况自适应调整。在JMVC编码平台上的实验验证了所提出的多描述编码方案对多视点视频的有效性和鲁棒性。
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引用次数: 4
Dynamic probabilistic shaping modulation based on fixed-to-fixed symbols projection constant composition distribution matching 基于固定到固定符号投影的恒成分分布匹配的动态概率整形调制
Shangxin Lin, Hua Shen, Zhili Lin, Lu Lin, Ze Dong
A probabilistic shaping modulation (PSM) format based on fixed-to-fixed (f2f) symbols projection constant composition distribution matching (SP-CCDM) method is proposed. The proposed PSM is an eminent coding method since the optimized redundancy rate by SP-CCDM is smaller than the one with conventional CCDM method. The change of constellation diagram under representative signal noise ratio rationalizes the root to corrupted signals during the investigation of spectral efficiency. The f2f SP-CCDM method offers an effective way to purification of received signals.
提出了一种基于固定到固定(f2f)符号投影恒定成分分布匹配(SP-CCDM)方法的概率整形调制(PSM)格式。由于SP-CCDM的优化冗余率比传统的CCDM方法小,因此所提出的PSM编码方法是一种杰出的编码方法。代表性信噪比下星座图的变化使频谱效率研究中对损坏信号的根源合理化。f2fsp - ccdm方法为接收信号的净化提供了一种有效的方法。
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引用次数: 1
Full custom design of adaptable montgomery modular multiplier for asymmetric RSA cryptosystem 非对称RSA密码系统自适应montgomery模乘法器的全定制设计
T. Adiono, Hans Ega, Hans Kasan, S. Fuada, S. Harimurti
The asymmetric RSA cryptosystem requires modulo operations in its encryption and decryption process, which is often realized with Montgomery modular multiplication. In this paper, we proposed a Montgomery multiplier hardware design using only primitive gates, adders, shifters, multiplexers, and registers. Our algorithm is also adaptable, which means that it can be reconfigured for applications with any arbitrary bits. The algorithm involves iteration, and to achieve less transistor count, we realized the iteration by feeding back the calculation results at the output back to the input, instead of connecting the gates in series. These considerations are made to allow us to create a compact custom ASIC design. The design was made with 130nm standard CMOS technology with NMOS and PMOS base width of 0.5|jm and 1 urn respectively. With the algorithm, our 8-bit multiplier ASIC design occupies an area of 0.0266mm2. The design is created and verified with Mentor Graphics™ EDA tools.
非对称RSA密码系统在加解密过程中需要进行模运算,通常用Montgomery模乘法来实现。在本文中,我们提出了一个蒙哥马利乘法器的硬件设计,仅使用原始门,加法器,移位器,多路复用器和寄存器。我们的算法还具有适应性,这意味着它可以针对任何任意位的应用程序进行重新配置。该算法涉及迭代,为了实现更少的晶体管数,我们通过将输出端的计算结果反馈到输入端来实现迭代,而不是将栅极串联起来。这些考虑使我们能够创建一个紧凑的定制ASIC设计。设计采用130nm标准CMOS工艺,NMOS基宽0.5 jm, PMOS基宽1 urn。使用该算法,我们的8位乘法器ASIC设计占地0.0266mm2。该设计是用Mentor Graphics™EDA工具创建和验证的。
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引用次数: 5
Improved detection for copy-move forgery with multi-scale sliding windows 改进的检测复制移动伪造与多尺度滑动窗口
Fengyong Li, Mingquan Xin, Jinguo Li, Jiang Yu
This work proposes an improvement solution for detecting copy-move forgery in individual image. The proposed method can significantly remove a large number of uncombined image block by using multi-scale sliding windows, so, it is different from the existing schemes. The proposed scheme consists of feature extraction, feature matching and uncombined block removing. DCT coefficient are extracted to design low-dimensional features which are considered to be more sensitive to copy region of image. Furthermore, we use fast k-means method to integrate image blocks with similar features as different clusters. Finally, multi-scale sliding windows is designed to further remove the uncombined blocks in detection results. Extensive experiments show that the proposed scheme is effective and efficient and outperforms the state-of-the-art copy-move detection methods with a lower false positive rate.
本文提出了一种检测单个图像复制-移动伪造的改进方案。该方法利用多尺度滑动窗口,能够有效地去除大量未合并的图像块,与现有方法有所不同。该方案包括特征提取、特征匹配和非组合块去除。提取DCT系数,设计对图像复制区域更敏感的低维特征。此外,我们使用快速k-means方法将具有相似特征的图像块作为不同的聚类进行整合。最后,设计多尺度滑动窗口,进一步去除检测结果中的未合并块。大量的实验表明,该方法是有效和高效的,并且具有较低的误报率,优于最先进的复制-移动检测方法。
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引用次数: 1
A fractional-order optimization and parametric selection method of fractional differential masks 分数阶微分掩模的分数阶优化与参数选择方法
Yanzhu Zhang, Minghai Zhang, Yijie Liu, Fandi Wang
When processing the image, The first-order image de-fuzzification template which is defined by the traditional integer differential produces a wide edge, while the second-order template enhances texture and noise. In order to avoid the side effects of the integer differential template, this paper constructs the fractional differential mask and constructs the fractional differential mask, In the traditional fractional mask, by setting the parameters manually, the entropy of the image can be used to determine the abundance of the image information as an image test standard, and an entropy optimal fractional differential mask parameter is selected, The simulation results show that the mask can not only keep the low-frequency contour information of the smooth region, but also enhance the texture information of the high-frequency edge and high-frequency in the image. For the severe weather images, the method used in this paper has a good effect, can retain the image information very well.
在处理图像时,由传统整数微分定义的一阶图像去模糊化模板产生宽边缘,而二阶模板增强纹理和噪声。为了避免整数微分模板的副作用,本文构造了分数阶微分掩模,构造了分数阶微分掩模,在传统的分数阶掩模中,通过手动设置参数,利用图像的熵来确定图像信息的丰度,作为图像的测试标准,并选择了一个熵最优的分数阶微分掩模参数;仿真结果表明,掩模既能保持平滑区域的低频轮廓信息,又能增强图像中高频边缘和高频的纹理信息。对于恶劣天气图像,本文采用的方法效果较好,可以很好地保留图像信息。
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引用次数: 0
Latency reduction with short processing time and short TTI length 通过短处理时间和短TTI长度减少延迟
Xinyi Zhang
Latency is an important component in fifth generation (5G) study. In this paper, we focus on the latency reduction with short processing time and short TTI length. The maximum time advance (TA) and transport block size (TBS) are introduced to shorten the processing time. Short processing time with frame structure unchanged results into less standardization efforts but is hard to support stricter requirement on latency such as less than 1ms. Short TTI length is taken into account and 2-symbol length can achieve a tradeoff between overhead and performance gain. A short PDCCH design is proposed and a two-stage DCI is introduced to handle the large number of blind decodes within a subframe due to the change of TTI length. Both short processing time and short TTI length are an effective way to reduce latency.
延迟是第五代(5G)研究中的一个重要组成部分。在本文中,我们关注的是在短处理时间和短TTI长度的情况下降低延迟。引入最大时间提前(TA)和传输块大小(TBS)来缩短处理时间。在帧结构不变的情况下,较短的处理时间减少了标准化的工作量,但难以支持更严格的延迟要求(如小于1ms)。考虑到较短的TTI长度,2符号长度可以在开销和性能增益之间实现折衷。提出了一种简短的dccch设计,并引入了两级DCI来处理由于TTI长度变化而导致的子帧内大量盲译码。缩短处理时间和TTI长度都是减少延迟的有效方法。
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引用次数: 8
Multi-exposure image fusion quality assessment using contrast information 基于对比度信息的多曝光图像融合质量评价
Lu Xing, H. Zeng, J. Chen, Jianqing Zhu, C. Cai, K. Ma
In this paper, a novel image quality assessment (IQA) metric for the multi-exposure image fusion (MEF) is proposed by using contrast information. Specifically, the proposed approach firstly performs the measurements of contrast structure similarity and contrast saturation similarity based on the observation that human perception is sensitive to contrast information inherited in the MEF and reference images. Then, considering that different reference images contribute differently to the MEF image, the weights are adaptively assigned to each reference image according to its relevance to the MEF image. A standard deviation based pooling strategy and multi-scale scheme are subsequently used to generate the final MEF image quality score. Experimental results have shown that the proposed metric produces high consistency with human perception of the MEF image quality and outperforms the state-of-the-art quality metric.
本文提出了一种基于对比度信息的多曝光图像融合图像质量评价方法。具体而言,该方法首先基于人类感知对MEF和参考图像中继承的对比度信息敏感的观察,进行对比度结构相似度和对比度饱和度相似度的测量。然后,考虑到不同参考图像对MEF图像的贡献不同,根据参考图像与MEF图像的相关性自适应赋予权重;然后使用基于标准差的池化策略和多尺度方案生成最终的MEF图像质量分数。实验结果表明,所提出的度量与人类对MEF图像质量的感知高度一致,并且优于最先进的质量度量。
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引用次数: 4
期刊
2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)
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