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Improvements of Acoustic Features for Speech Separation

Improvements of Acoustic Features for Speech Separation

引用

2016联合国际信息技术、机械与电子工程国际会议

作者： Lujun Li Chuxiong Qin dan Qu China National Digital Switching System Engineering & Technological R&D Center

ISBN: (纸本)9781510830028

Acoustic features chosen from the input utterances play crucial roles in speech separation. In this paper, we propose a novel complementary feature approach that performs speech separation by combining five promising features, including Gammatone filterbank power spectra(GF) and multi-resolution cochleagram(MrCG) proposed recently especially for speech separation, as a super-vector fed into deep neural network(dNN). Additionally, based on the complementary features, we do experiments with two dNN training strategies, which are restricted Boltzmann machine(rBM) pre-training and dropout combined with rectified Linear Units(re LU), to optimize the performance of dNN. The experiment results, obtained in IEEE and TIMIT corpora using four different noises at low SNr levels of 0d B and-5d B, indicate that complementary features and rBM model improve all evaluation metrics. By contrast, dropout combined with re LU system specializes in noise suppression and objective intelligibility more.

关键词： speech separation dNN complementary features rBM pre-training dropout

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Improved Propagator Method for Joint Angle and doppler Estimation Based on Structured Least Squares

Improved Propagator Method for Joint Angle and Doppler Estim...

引用

2016 8th IEEE International Conference on Communication Software and Networks(ICCSN 2016)

作者： Likai Guo Ying Wu China National Digital Switching System Engineering & Technological R&D Center

A new propagator method for joint angle and doppler estimation based on structured least squares(SLS)is *** defining a new propagator matrix the proposed approach reduces the loss of array *** addition,SLS which will take the specific relationship between two parts of the equation into account is utilized to enhance the estimation performance when solving the rotational invariance matrix *** results are provided verifying the effectiveness of the proposed method.

关键词： array singnal processing joint angle and doppler estimation Structured Least Squares(SLS)

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Energy efficiency resource allocation in downlink cell-free massive MIMO system

Energy efficiency resource allocation in downlink cell-free ...

引用

IEEE International Symposium on Intelligent Signal Processing and Communication systems (ISPACS)

作者： Ying Hu Fei Zhang Chunguo Li Yi Wang rui Zhao School of Information Science and Engineering Southeast University Nanjing China School of Electronics and Information Jiangsu University of Science and Technology Zhenjiang China School of Electronics and Communication Engineering Zhengzhou University of Aeronautics Zhengzhou China China National Digital Switching System Engineering &Technological R&D Center Zhengzhou China College of Information Science and Engineering Huaqiao University Xiamen China

In this paper, a downlink cell-free Massive MIMO system (CF-M-MIMO-S) is considered. The CF-M-MIMO-S is a distributed M-MIMO-S, where access points (APs) with very great quantity of antennas, and a much smaller number of independent users are distributed randomly. Firstly, an approximate expression for the capacity with perfect channel state information and conjugate beamforming scheme is derived. Secondly, an energy-efficient (EE) resource allocation strategy is advanced, which is aim to maximize system EE. Specifically, the power consumption include transmitting power, calculation power and circuit power. Simulation results indicate that the throughput of derived approximate expression is very close to theoretical value. It is also demonstrated The effectiveness of proposed algorithm and the trade-off between EE and the quantity of Aps is, meanwhile, the performance of throughput of the proposed algorithm is very well.

关键词： Signal processing Communication systems

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LOW-COMPLEXITY BEAMFOrMING dESIGNS OF SUM SECrECY rATE MAXIMIZATION FOr THE GAUSSIAN MISO MULTI-rECEIVEr WIrETAP CHANNEL

LOW-COMPLEXITY BEAMFORMING DESIGNS OF SUM SECRECY RATE MAXIM...

引用

IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Yanqun Tang Caiyao Sheng Yunpeng Hu Hongyi Yu Xiaoyi Zhang National Digital Switching System Engineering & Technology R & D Center Zhengzhou China 450000

ISBN: (纸本)9781479999897

This paper studies the beamforming design for sum secrecy rate (SSr) maximization in the Gaussian multiple-input single-output multi-receiver wiretap channel (MISO-MrWC). The optimization problem of finding the optimal beamforming algorithm is non-convex and intractable to solve using low-complexity methods. Motivated by the thinking of zero-forcing (ZF) and signal-to-leakage-plus-noise ratio (SLNr), we propose three low-complexity beamforming algorithms for finding a local SSr optimum. The simulation results show that the SLNr-based beamforming algorithm outperforms the other two algorithms with ZF preprocessing.

关键词： Sum secrecy rate beamforming design low complexity ZF SLNr zero frequency multiple-input single-output Beamforming Gauss Non-Convex

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Cooperation incentive mechanism for selfish users based on trust degree

Cooperation incentive mechanism for selfish users based on t...

引用

International Conference on Information Science and Technology (ICIST)

作者： Wen Wang Kaizhi Huang Yi Zou China National Digital Switching System Engineering Technological R&D Center Zhengzhou

In multiuser networks, selfish users refuse to provide other users with their own energy and computing resources. In order to encourage selfish users to offer their resources, a cooperation incentive mechanism based on users trust degree evaluation is proposed. The mechanism helps relays to decide whether to participate in the cooperation or not by comparing trust value. Selfish users with lower trust value will be rejected on higher probability, while cooperation can improve trust value and their own communication security. Several experiments demonstrate the effectiveness of the proposed scheme in this paper. Selfish users actively participate in the cooperation comparing situations without encouragement. At the same time, the communication quality of the users is close to the cooperation with selfless relays.

关键词： decision support systems

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Image segmentation based on local Chan-Vese model optimized by max-flow algorithm

Image segmentation based on local Chan-Vese model optimized ...

引用

ACIS International Conference on Software engineering, Artificial Intelligence, Networking, and Parallel/distributed Computing (SNPd)

作者： Zhongguo Li Lei Zeng Ti Wang Jian Chen Yan Bin National Digital Switching System Engineering & Technological R&D Center Zhengzhou China

Image segmentation can be used in non-destructive testing, tracking and recognition. Level set method for image segmentation has poor performance on efficiency. In this paper, we propose to use max-flow algorithm to optimize a locally improved Chan-Vese model for image segmentation in the presence of intensity inhomogeneity. The energy function of local Chan-Vese model is introduced firstly. This model consists of global term, local term and penalty term and the local term contributes the segmentation for images with intensity inhomogeneity. Then, we convert this energy function to the frame of Graph Cut whose energy function can be efficiently minimized by max-flow algorithm. As a result, the process of optimization of local Chan-Vese model can be accelerated by using max-flow algorithm. The experiments demonstrate that the proposed method can achieve satisfactory segmentation for images with intensity inhomogeneity as well as very high efficiency.

关键词： Mathematical model Image segmentation Algorithm design and analysis Nonhomogeneous media Image edge detection Computational modeling Level set

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Single-trial ErP detecting for emotion recognition

Single-trial ERP detecting for emotion recognition

引用

ACIS International Conference on Software engineering, Artificial Intelligence, Networking, and Parallel/distributed Computing (SNPd)

作者： Jingfang Jiang Ying Zeng Li Tong Chi Zhang Bin Yan National Digital Switching System Engineering & Technological R&D Center Zhengzhou China

Emotion recognition, as an important part of human-computer interaction, has been extensively researched. Various studies have already verified the relationship between emotion and the event-related potentials (ErPs). In this paper, a new methodology for emotion recognition is investigated by detecting single-trial ErPs related to some specific level of emotions. First, a spatial filter is constructed to estimate the ErP components. Then the most discriminative spatial and temporal features of the entire ErP waveform are extracted with linear discriminant analysis. The performance of this method is tested by classifying the emotional valence on three levels, the extremely negative, the moderately negative and the neutral, with the support vector machine (SVM). The result shows that the proposed method is effective.

关键词： Emotion recognition Spatial filters Electroencephalography Classification algorithms Support vector machines Covariance matrices Training

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Analysis of Measured Sea clutter Power distribution based on Goodness-of-Fit Tests

Analysis of Measured Sea clutter Power Distribution based on...

引用

IEEE Asia-Pacific Conference on Antennas and Propagation

作者： Xiaoyan du Peipei Wei Guojun Tian Dept. of Information engineering Huanghe Science and Technology University Dept. of Communication National Digital Switching System Engineering & Technology R&D Center (NDSC)

ISBN: (纸本)9781538616093

recently, refractivity from clutter (rFC) is an important means to obtain spatial reflectivity distribution. As the input of rFC, radar sea clutter power seriously affects the inversion performance. For this problem, we study its distribution to get more priori information of inversion. Using this way, inversion accuracy could be improved. In this paper, seven kinds of power probability density function (PPdF) are presented. Based on these distribution models, The experimental data measured in Bohai Sea are analyzed. In addition, the goodness-of-fit tests are used to test the degree of fitness between the experimental data and the models. The results show that these radar sea clutter power data meet log-normal distribution or meet Weibull distribution.

关键词： Power probability density function (PPdF) Goodness-of-fit tests Log-normal distribution

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design of a dual-band dual-polarized slot antenna for Ku-band video satellite application

Design of a dual-band dual-polarized slot antenna for Ku-ban...

引用

International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Huazhen Li Yi Zhang Guangqiu Zhang School of Information System Engineering National Digital Switching System Engineering &Technological R&D Center Zhengzhou China

ISBN: (纸本)9781509047444

A dual-band dual-polarized slot antenna for Ku-band video satellite application is proposed. It mainly consists of the ground with a wide slot and a reflector. The orthogonal modes are excited by slot-coupling feeding and microstrip feeding to realize dual polarization. The dual-band characteristic is realized using the multi-resonant performance of wide slot. The impedance bandwidth for two port covers the dual wide bandwidths of 10.7-11.7GHz and 11.7-12.7GHz. The gain can be up to 8.8dBi. The proposed antenna has low profile, simple structure, good port isolation and high gain. It is a good candidate for Ku-band video satellite antenna.

关键词： decision support systems

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An intensive security architecture with multi-controller for SdN

An intensive security architecture with multi-controller for...

引用

IEEE Conference on Computer Communications Workshops, INFOCOM Wksps

作者： Chao Qi Jiangxing Wu Hongchao Hu Guozhen Cheng Wenyan Liu Jianjian Ai Chao Yang National Digital Switching System Engineering & Technological R&D Center Zhengzhou Henan China

ISBN: (纸本)9781467399562

Modifying flow rule attack is a type of attack against controllers in SdN, leading to severe influence on network. In this paper, we propose Mcad-SA, an aware decision-making security architecture with multi-controller, to deal with it. It schedules the controllers in a dynamic and random way and adopts the vote results from the majority of controllers to determine valid flow rules. Theory analysis proves its validity.

关键词： Security Switches Transponders decision making robustness Computer architecture

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