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2022 30th European Signal Processing Conference (EUSIPCO)最新文献

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Learning-Based Scattering Transform for Explainable Classification 基于学习的可解释分类散射变换
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909816
M. Thomas, Fillatre Lionel, Deruaz-Pepin Laurent
Vessel noise classification is generally considered as a challenging task due to its need for robustness and reliability. Thus, classification in this domain mainly relied on expert feature. Raw waveform architectures have been historically avoided, despite their performances in other domains. This paper proposes a Learning-based Scattering Transform (LST) that efficiently learns temporal dependencies within cyclostationary signals, such as vessel noises. The LST is implememented as a Convolutional Neural Network (CNN) with short filters whose structure mimics a multiscale signal decomposition. By this way, the architecture of our neural network is intrinsically explainable. Numerical simulations compare our method to an other explainable model and classic convolutional neural networks.
船舶噪声分类是一项具有挑战性的任务,因为它需要鲁棒性和可靠性。因此,该领域的分类主要依赖于专家特征。尽管原始波形架构在其他领域表现出色,但它们在历史上一直被避免使用。本文提出了一种基于学习的散射变换(LST)方法,可以有效地学习周期平稳信号(如船舶噪声)中的时间依赖性。LST是由卷积神经网络(CNN)实现的,该网络带有短滤波器,其结构模拟了多尺度信号分解。通过这种方式,我们的神经网络架构在本质上是可解释的。数值模拟将我们的方法与另一种可解释模型和经典卷积神经网络进行了比较。
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引用次数: 0
Relationship Between Speakers' Physiological Structure and Acoustic Speech Signals: Data-Driven Study Based on Frequency-Wise Attentional Neural Network 说话人生理结构与声语音信号的关系:基于频率型注意神经网络的数据驱动研究
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909649
Kai Li, Xugang Lu, M. Akagi, J. Dang, Sheng Li, M. Unoki
Quantitatively revealing the relationship between speakers' physiological structure and acoustic speech signals by considering the properties of resonance and antiresonance can help us to extract effective speaker discriminative information (SDI) from speech signals. The conventional quantification method based on F-ratio only considers the power of acoustic speech in each frequency band independently. We propose a novel frequency-wise attentional neural network to learn the nonlinear combined effect of the frequency components on speaker identity. The learned results indicate that antiresonance frequency induced by the nasal cavity is another essential factor for speaker discrimination that the F-ratio method could not reveal. To further evaluate our findings, we designed a non-uniform subband processing strategy based on the learned results for speaker feature extraction and did automatic speaker verification (ASV). The ASV results confirmed that further emphasizing the spectral structure around the antiresonance frequency region can enhance speaker discrimination.
通过考虑共振和反共振特性,定量揭示说话人生理结构与声语音信号的关系,有助于从语音信号中提取有效的说话人判别信息(SDI)。传统的基于f比的量化方法只单独考虑每个频段的声语音功率。我们提出了一种新的基于频率的注意力神经网络来学习频率分量对说话人身份的非线性组合效应。学习结果表明,鼻腔引起的反共振频率是F-ratio法无法揭示的另一个说话人识别的重要因素。为了进一步验证我们的研究结果,我们设计了一种基于学习结果的非均匀子带处理策略用于说话人特征提取,并进行了自动说话人验证(ASV)。ASV结果证实,进一步强调反共振频率区域周围的频谱结构可以增强说话人的识别能力。
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引用次数: 1
Indoor UAV Height Estimation with Multiple Model-Detecting Particle Filters 基于多模型检测粒子滤波的室内无人机高度估计
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909934
Hechuan Wang, Xiaokun Zhao, M. Bugallo
The precision of indoor localization, especially height estimation, is critical to unmanned aerial vehicle (UAV) navigation to avoid crashes because indoor environments are narrow and complex. The lack of satellite-based navigation signals makes this task very challenging. Moreover, objects in indoor environments could be randomly shaped and in motion, making map-based navigation unreliable. There exist solutions utilizing advanced sensor arrays such as laser scanners or multiple cameras, but the UAVs' weight load and computational resources are limited. In this paper, we propose a filtering-based method that allows for estimation of the height of the UAV by stand -alone range finders. Model-detecting particle filters are used to detect changes in objects while estimating the height of the UAV simultaneously. Multiple filters are utilized to speed up the computation. Numerical experiments show that the proposed method is more accurate than other methods.
由于室内环境狭窄而复杂,室内定位尤其是高度估计的精度对无人机导航避免碰撞至关重要。由于缺乏卫星导航信号,这项任务非常具有挑战性。此外,室内环境中的物体可能是随机形状和运动的,这使得基于地图的导航不可靠。现有的解决方案利用先进的传感器阵列,如激光扫描仪或多个摄像头,但无人机的重量负载和计算资源有限。在本文中,我们提出了一种基于滤波的方法,该方法允许使用独立测距仪估计无人机的高度。模型检测粒子滤波器用于检测目标的变化,同时估计无人机的高度。利用多个滤波器来加快计算速度。数值实验表明,该方法比其他方法具有更高的精度。
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引用次数: 1
Edge Machine Learning in 3GPP NB-IoT: Architecture, Applications and Demonstration 3GPP NB-IoT中的边缘机器学习:架构、应用和演示
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909793
D. Vukobratović, Milan Lukić, I. Mezei, D. Bajović, Dragan Danilovic, Milos Savic, Zarko Bodroski, S. Skrbic, D. Jakovetić
The emergence of cellular Internet of Things (IoT) standards such as NB-IoT brings novel opportunities for low-cost wide-area IoT applications. Augmenting massive IoT deployments with Machine Learning (ML) algorithms deployed at the edge enables design and implementation of a novel intelligent IoT services. In this paper, we present an architectural outlook and an overview of our recent activities that target integration of ML modules into the cellular IoT architecture. The three-layer architecture considered in this paper embeds ML modules at the edge devices (ML-EDGE), within the core network (ML-FOG) and at the cloud servers (ML-CLOUD), thus balancing between the system response time and accuracy. We discuss alignment of the proposed architecture with ongoing trends in 3GPP architecture evolution. We design, integrate and demonstrate edge ML use cases relying on our real-world deployment of about 150 static and mobile nodes integrated into the NB-IoT network.
蜂窝物联网(IoT)标准(如NB-IoT)的出现为低成本广域物联网应用带来了新的机遇。通过在边缘部署机器学习(ML)算法来增强大规模物联网部署,可以设计和实施新型智能物联网服务。在本文中,我们提出了一个架构展望,并概述了我们最近的活动,目标是将ML模块集成到蜂窝物联网架构中。本文考虑的三层架构将机器学习模块嵌入边缘设备(ML- edge)、核心网络(ML- fog)和云服务器(ML- cloud),从而在系统响应时间和准确性之间取得平衡。我们讨论了拟议的体系结构与3GPP体系结构演进的持续趋势的一致性。我们设计、集成和演示边缘机器学习用例,依赖于我们在NB-IoT网络中集成的约150个静态和移动节点的实际部署。
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引用次数: 0
Integration of Bi-dimensional Empirical Mode Decomposition With Two Streams Deep Learning Network for Infrared and Visible Image Fusion 基于双流深度学习网络的二维经验模态分解红外与可见光图像融合
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909631
Manoj K. Panda, B. Subudhi, T. Veerakumar, V. Jakhetiya
Image fusion is a technique that combines the complementary details from the images captured from different sensors into a single image with high perception capability. In the fusion process, the significant details from different source images are combined in a meaningful way. In this article, we propose a unique and first effort of infrared and visible image fusion technique with bi-dimensional empirical mode decomposition (BEMD) induced VGG-16 deep neural network. The proposed BEMD strategy is incorporated with a pre-trained VGG-16 network that can effectively handle the vagueness of infrared and visible images and retain deep multi-layer features at different scales on the frequency domain. A novel fusion strategy is proposed here to analyze the spatial inter-dependency between these features and precisely preserve the correlative information from the source images. The minimum selection strategy is explored in the proposed algorithm to keep the standard details with reduced artifacts in the fused image. The competency of the proposed algorithm is estimated using qualitative and quantitative assessments. The efficiency of the proposed technique is corroborated against fifteen existing state-of-the-art fusion techniques and found to be efficient.
图像融合是一种将从不同传感器捕获的图像中互补的细节组合成具有高感知能力的单一图像的技术。在融合过程中,将不同源图像的重要细节以有意义的方式结合起来。在本文中,我们首次提出了一种独特的基于二维经验模态分解(BEMD)诱导的VGG-16深度神经网络的红外和可见光图像融合技术。提出的BEMD策略与预训练的VGG-16网络相结合,可以有效地处理红外和可见光图像的模糊性,并在频域上保留不同尺度的深层多层特征。本文提出了一种新的融合策略来分析这些特征之间的空间依赖关系,并精确地保留源图像中的相关信息。该算法探索了最小选择策略,在保留标准细节的同时减少了融合图像中的伪影。所提出的算法的能力是使用定性和定量评估估计。所提出的技术的效率与现有的15种最先进的融合技术相印证,发现是有效的。
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引用次数: 0
Learning Similarity-Preserving Representations of Brain Structure-Function Coupling 脑结构-功能耦合的学习保持相似性表征
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909566
Yang Li, G. Mateos
Advances in graph signal processing for network neuroscience offer a unique pathway to integrate brain structure and function, with the goal of revealing some of the brain's organizing principles at the system level. In this direction, we develop a supervised graph representation learning framework to model the relationship between brain structural connectivity (SC) and functional connectivity (FC) via a graph encoder-decoder system. Specifically, we propose a Siamese network architecture equipped with graph convolutional encoders to learn graph (i.e., subject)-level embeddings that preserve application-dependent similarity measures between brain networks. This way, we effectively increase the number of training samples and bring in the flexibility to incorporate additional prior information via the prescribed target graph-level distance. While information on the brain structure-function coupling is implicitly distilled via reconstruction of brain FC from SC, our model also manages to learn representations that preserve the similarity between input graphs. The superior discriminative power of the learnt representations is demonstrated in downstream tasks including subject classification and visualization. All in all, this work advocates the prospect of leveraging learnt graph-level, similarity-preserving embeddings for brain network analysis, by bringing to bear standard tools of metric data analysis.
网络神经科学在图信号处理方面的进步为整合大脑结构和功能提供了一条独特的途径,其目标是在系统层面揭示大脑的一些组织原则。在这个方向上,我们开发了一个监督图表示学习框架,通过一个图编码器-解码器系统来模拟大脑结构连接(SC)和功能连接(FC)之间的关系。具体来说,我们提出了一个带有图卷积编码器的Siamese网络架构,以学习图(即主题)级嵌入,从而保留脑网络之间依赖于应用的相似性度量。通过这种方式,我们有效地增加了训练样本的数量,并通过规定的目标图级距离引入了附加先验信息的灵活性。虽然关于大脑结构-功能耦合的信息是通过从SC中重建大脑FC隐含地提取出来的,但我们的模型还设法学习了保留输入图之间相似性的表示。学习表征在主题分类和可视化等下游任务中表现出较强的判别能力。总而言之,这项工作提倡通过引入度量数据分析的标准工具,利用习得的图级、保持相似性的嵌入来进行大脑网络分析。
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引用次数: 1
Design of Single Unimodular Waveform With Good Correlation Level Via Phase Optimizations 通过相位优化设计具有良好相关电平的单模波形
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909969
Xiaohan Zhao, Yongzhe Li, R. Tao
In this paper, we focus on the unimodular waveform design with good correlation property, i.e., with low integrated sidelobe level (ISL). In contrast to existing approaches that commonly involve constraints on the moduli of waveform elements, we come up with the idea of designing the waveform via directly optimizing its phase values. Using this idea, the standard ISL-minimization based waveform design is converted as an unconstrained optimization problem with respect to the phase values of waveform elements, which avoids the repetitive procedure of projecting non-unimodular complex values into the best approximations of constant magnitudes. To this end, we first reformulate the ISL metric into a function of the phase values to be obtained for the waveform, and then solve the new unconstrained ISL-minimization-based waveform design using majorization-minimization techniques. The first-order gradient of the reformulated objective function is derived, by which the majorant of the objective is elaborated. Based on this, we finally tackle the design via iterations, at each of which we obtain a closed-form solution with fast implementations. An algorithm is proposed, with whose simpleness and effectiveness are verified by simulations.
本文主要研究具有良好相关特性的单模波形设计,即具有较低的综合旁瓣电平(ISL)。与现有的通常涉及对波形单元模量的约束的方法相反,我们提出了通过直接优化其相位值来设计波形的想法。利用这一思想,将基于is最小化的标准波形设计转换为波形单元相位值的无约束优化问题,从而避免了将非单模复数值投影到恒幅值的最佳近似值的重复过程。为此,我们首先将ISL度量重新表述为波形相位值的函数,然后使用最大化-最小化技术求解新的基于无约束ISL最小化的波形设计。导出了重新表述后的目标函数的一阶梯度,并以此阐述了目标函数的主体。在此基础上,我们最终通过迭代处理设计,在每次迭代中我们都获得了具有快速实现的封闭形式的解决方案。提出了一种算法,通过仿真验证了算法的简单性和有效性。
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引用次数: 0
Conditional Variational Graph Autoencoder for Air Quality Forecasting 空气质量预报的条件变分图自编码器
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909725
Esther Rodrigo Bonet, T. Do, Xuening Qin, J. Hofman, V. Manna, Wilfried Philips, Nikos Deligiannis
To control air pollution and mitigate its negative effect on health, it is of the utmost importance to have accurate real-time forecasting models. Existing deep-learning-based air quality forecasting models typically deploy temporal and-less often-spatial modules. Yet, data scarcity emerges as a real issue in this domain, a problem that can be solved by capturing the data distribution. In this work, we address data scarcity by proposing a novel conditional variational graph autoencoder. Our model is able to forecast air pollution by efficiently encoding the spatio-temporal correlations of the known data. Additionally, we leverage dynamic context data such as weather or satellite images to condition the model's behaviour. We formulate the problem as a context-aware graph-based matrix completion task and utilize street-level data from mobile stations. Experiments on real-world air quality datasets show the improved performance of our model with respect to state-of-the-art approaches.
为了控制空气污染并减轻其对健康的负面影响,拥有准确的实时预测模型至关重要。现有的基于深度学习的空气质量预测模型通常采用时间和空间模块。然而,数据稀缺性在该领域成为一个真正的问题,这个问题可以通过捕获数据分布来解决。在这项工作中,我们通过提出一种新的条件变分图自编码器来解决数据稀缺问题。我们的模型能够通过有效地编码已知数据的时空相关性来预测空气污染。此外,我们利用动态上下文数据,如天气或卫星图像来调节模型的行为。我们将问题表述为上下文感知的基于图形的矩阵完成任务,并利用来自移动站点的街道级数据。在真实世界空气质量数据集上的实验表明,相对于最先进的方法,我们的模型的性能得到了改进。
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引用次数: 1
Robust Tensor Tracking With Missing Data Under Tensor-Train Format 缺失数据下的鲁棒张量跟踪
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909702
Thanh Trung LE, K. Abed-Meraim, N. Trung, A. Hafiane
Robust tensor tracking or robust adaptive tensor decomposition of streaming tensors is crucial when observations are corrupted by sparse outliers and missing data. In this paper, we introduce a novel tensor tracking algorithm for factorizing incomplete streaming tensors with sparse outliers under tensor-train (TT) format. The proposed algorithm consists of two main stages: online outlier rejection and tracking of TT-cores. In the former stage, outliers affecting the data streams are efficiently detected by an ADMM solver. In the latter stage, we propose an effective recursive least-squares solver to incrementally update TT-cores at each time $t$. Several numerical experiments on both simulated and real data are presented to verify the effectiveness of the proposed algorithm.
鲁棒张量跟踪或流张量的鲁棒自适应张量分解是至关重要的,当观测被稀疏的异常值和丢失的数据破坏。本文介绍了一种新的张量跟踪算法,用于在张量序列(TT)格式下分解具有稀疏离群值的不完全流张量。该算法包括两个主要阶段:在线异常值抑制和tt核心跟踪。在前一阶段,通过ADMM求解器有效地检测影响数据流的异常值。在后一阶段,我们提出了一个有效的递归最小二乘求解器,以每次$t$增量更新tt核心。在模拟和实际数据上进行了数值实验,验证了该算法的有效性。
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引用次数: 3
Boundary Enhanced Semantic Segmentation for High Resolution Electron Microscope Images 高分辨率电子显微镜图像的边界增强语义分割
Pub Date : 2022-08-29 DOI: 10.23919/eusipco55093.2022.9909919
Matthias Pollach, Felix Schiegg, Matthias Ludwig, A. Bette, Alois Knoll
This work proposes an automated semantic segmen-tation approach for high resolution scanning electron microscope images, which enables the detection of hardware Trojans and counterfeit integrated circuits. We evaluate state of the art segmentation approaches and leverage expert domain knowledge to propose a neural network architecture tailored for our use case. We further address the challenge of the limited availability of training images and evaluate which pre-trained encoder can be leveraged most effectively for the given use case. The proposed segmentation network uses expert domain knowledge to account for the importance of separating technology features on a fine-grain level by introducing a separate boundary stream. The test results compare our network to a baseline approach and to two state-of-the-art segmentation networks.
这项工作提出了一种用于高分辨率扫描电子显微镜图像的自动语义分割方法,该方法可以检测硬件木马和假冒集成电路。我们评估了最先进的分割方法,并利用专家领域的知识,为我们的用例提出了一个量身定制的神经网络架构。我们进一步解决了训练图像可用性有限的挑战,并评估了哪种预训练编码器可以最有效地用于给定的用例。所提出的分割网络通过引入单独的边界流,利用专家领域知识在细粒度水平上考虑了分离技术特征的重要性。测试结果将我们的网络与基线方法和两个最先进的分割网络进行比较。
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引用次数: 0
期刊
2022 30th European Signal Processing Conference (EUSIPCO)
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