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Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)最新文献

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Real-Time Estimation of Direction of Arrival of Speech Source Using Three Microphones. 基于三个传声器的语音源到达方向实时估计。
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2020-10-01 Epub Date: 2020-09-23 DOI: 10.1109/sips50750.2020.9195217
Serkan Tokgöz, Anton Kovalyov, Issa Panahi
{"title":"Real-Time Estimation of Direction of Arrival of Speech Source Using Three Microphones.","authors":"Serkan Tokgöz,&nbsp;Anton Kovalyov,&nbsp;Issa Panahi","doi":"10.1109/sips50750.2020.9195217","DOIUrl":"https://doi.org/10.1109/sips50750.2020.9195217","url":null,"abstract":"<p><p>In this paper, we present a real-time noise-robust direction of arrival (DOA) estimation technique using only the three built-in microphones of the modern Android-based smartphone. The proposed method eliminates the 'front-back' ambiguity caused by the symmetry of the two microphones reported previously and improves the performance of DOA estimation in noisy speech environments. Our method enhances the spatial awareness of hearing-impaired users by displaying the precise DOA angle of speech source on their smartphone screen. For increased efficiency, noise-robustness, and accuracy of the proposed DOA estimation method, a spectral pre-filtering technique and a Voice Activity Detector (VAD) based post-filtering are used along with a modified generalized cross-correlation (GCC) technique. Real recorded and simulated data under realistic noisy conditions are used in the evaluations of the proposed algorithm. Real-time implementation of the proposed system is carried out on an Android-based smartphone without any additional hardware or external microphone attachments. Experimental results show the performance of the proposed method versus those without pre or post-filtering under three different noisy conditions with 0dB to 10dB signal to noise ratios (SNRs).</p>","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"2020 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/sips50750.2020.9195217","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39011513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Optimization of Calibration Algorithms on a Manycore Embedded Platform 多核嵌入式平台标定算法的优化
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2018-10-01 DOI: 10.1109/SiPS.2018.8598369
Nicolas Sourbier, J. Nezan, C. Tasse, J. Hascoet
{"title":"Optimization of Calibration Algorithms on a Manycore Embedded Platform","authors":"Nicolas Sourbier, J. Nezan, C. Tasse, J. Hascoet","doi":"10.1109/SiPS.2018.8598369","DOIUrl":"https://doi.org/10.1109/SiPS.2018.8598369","url":null,"abstract":"This paper presents the porting and the optimization of full polarization, direction independent calibration algorithm for radio-interferometry, on an embedded many-core platform. In astronomy, calibration algorithms consist of solving for the unknown complex antenna gains using a known model of the sky. Calibration is a key computation to provide images of the sky at good quality and high resolutions. In the context of the Square Kilometer Array (SKA) project, real-time and low power execution of the calibration is challenging. In this paper, we show that the CohJohnes algorithm provides good properties for being executed efficiently on the new generation of many-core embedded platforms. Experimental results are provided using the Kalray MPPA Bostan platform running 288 64-bit VLIW cores and delivering up to 845 GFLOPS at 12W.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"12 1","pages":"164-169"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77412225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A signal denoising technique based on wavelets modulus maxima lines and a self-scalable grid classifier 基于小波模极大值线和自扩展网格分类器的信号去噪技术
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2015-12-03 DOI: 10.1109/SiPS.2015.7344974
R. M. G. Machado, H. O. Mota
{"title":"A signal denoising technique based on wavelets modulus maxima lines and a self-scalable grid classifier","authors":"R. M. G. Machado, H. O. Mota","doi":"10.1109/SiPS.2015.7344974","DOIUrl":"https://doi.org/10.1109/SiPS.2015.7344974","url":null,"abstract":"This paper presents the description of a signal processing technique using the Wavelets Transform and a self-scalable grid classifier. The procedure is based on the cycle-spinning approach applied to the Translation-invariant Wavelet Transform. It exploits the characteristics of the Wavelets modulus maxima propagation along decomposition levels (scales) as the criterion to select the relevant coefficients. Selection was performed by a data classifier inspired on a Self-organizing Map but with enhancements to incorporate self-scalability and multiple instance learning capabilities. The procedure was employed for the processing of Partial Discharge signals, which is a technique for the diagnostics of high-voltage equipment. We performed comparisons with standard form classifiers based on the Multilayer Perceptron and Support Vector Machines. The results show that the technique allows the same orders of accuracy and generalization of those classifiers, but with the advantages of self-scalability, dimensional independence, low processing cost and high degree of parallelization.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"16 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80211137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Spectral Management of Multiple Wireless Signals Based Cognitive Radio 基于认知无线电的多无线信号频谱管理
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2013-01-01 DOI: 10.12720/IJSPS.1.2.290-295
Ammar Abdul, Hamed Khader, A. Shabani, M. Beg
{"title":"Spectral Management of Multiple Wireless Signals Based Cognitive Radio","authors":"Ammar Abdul, Hamed Khader, A. Shabani, M. Beg","doi":"10.12720/IJSPS.1.2.290-295","DOIUrl":"https://doi.org/10.12720/IJSPS.1.2.290-295","url":null,"abstract":"Intelligent radio resource management (RRM) policies could be applied to minimize the harmful effects of interference and an uneven load distribution. RRM should provide efficient spectrum and channel allocation mechanisms, modulation selection algorithms, power control and load balancing. Spectrum sensing is a key enabling technology for a broad class of cognitive radio systems involving spectrum agility. In order to identify spectral opportunities, spectrum sensing is needed by the secondary users (SU). In this paper a spectral management and sensing for three types of wireless signals within the IEEE802 family (Wi-Fi, Zig-Bee and Bluetooth) are presented. Then SU efficiently exploit the idle spectrum and vacate it when required by primary user (PU). A simulation system is built and Energy Detector technique is used for sensing the spectrum. The results shows that delay times for changing the status between exploiting and vacating the channels are too low. The error detection is occurred in limited range of SNR because of using fixed threshold level. ","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"16 1","pages":"290-295"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91397932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesizing hardware from dataflow programs: An MPEG-4 simple profile decoder case study 从数据流程序合成硬件:一个MPEG-4简单配置文件解码器案例研究
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2008-11-17 DOI: 10.1109/SIPS.2008.4671777
J. Janneck, Ian D. Miller, D. Parlour, Ghislain Roquier, M. Wipliez, M. Raulet
{"title":"Synthesizing hardware from dataflow programs: An MPEG-4 simple profile decoder case study","authors":"J. Janneck, Ian D. Miller, D. Parlour, Ghislain Roquier, M. Wipliez, M. Raulet","doi":"10.1109/SIPS.2008.4671777","DOIUrl":"https://doi.org/10.1109/SIPS.2008.4671777","url":null,"abstract":"The MPEG Reconfigurable Video Coding working group is developing a new library-based process for building the reference codecs of future MPEG standards, which is based on dataflow and uses an actor language called CAL. The paper presents a code generator producing RTL targeting FPGAs for CAL, outlines its structure, and demonstrates its performance on an MPEG-4 Simple Profile decoder. The resulting implementation is smaller and faster than a comparable RTL reference design, and the second half of the paper discusses some of the reasons for this counter-intuitive result.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"9 1","pages":"287-292"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91349215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 122
Analysis of Forwarding Mechanisms on Fine-Grain Gradient Sinking Model in WSN WSN中细粒梯度下沉模型转发机制分析
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2008-05-01 DOI: 10.1007/S11265-007-0103-4
Sun Limin, Hongsong Zhu, Duan Bin, Xiaowei Li, S. Yi
{"title":"Analysis of Forwarding Mechanisms on Fine-Grain Gradient Sinking Model in WSN","authors":"Sun Limin, Hongsong Zhu, Duan Bin, Xiaowei Li, S. Yi","doi":"10.1007/S11265-007-0103-4","DOIUrl":"https://doi.org/10.1007/S11265-007-0103-4","url":null,"abstract":"","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"19 4 1","pages":"145-159"},"PeriodicalIF":0.0,"publicationDate":"2008-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83153367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Rapid Abstract Control Model for Signal Processing Implementation 用于信号处理实现的快速抽象控制模型
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387584
Kannan Gaddam, N. Chandrachoodan, S. Srinivasan
{"title":"Rapid Abstract Control Model for Signal Processing Implementation","authors":"Kannan Gaddam, N. Chandrachoodan, S. Srinivasan","doi":"10.1109/SIPS.2007.4387584","DOIUrl":"https://doi.org/10.1109/SIPS.2007.4387584","url":null,"abstract":"Evaluating different architectures is an important step in implementing signal processing algorithms in hardware. Often specific resource or memory requirements and performance can be estimated only through simulation. This can be difficult when detailed system descriptions are used. There is a need for quick simulation and estimation of performance. The Rapid Abstract Control (RAC) model is presented as an approach to solve this problem. Simple primitives are defined that can be used to construct models for simulation. The Single Scale Retinex (SSR) algorithm is used to demonstrate the effectiveness of the modeling approach.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"26 1","pages":"418-423"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75417095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Luby Transform Coding Aided Iterative Detection for Downlink SDMA Systems 下行SDMA系统的Luby变换编码辅助迭代检测
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387580
Chun-Yi Wei, Thanh Dang Nguyen, N. Wu, J. Akhtman, Lie-liang Yang, L. Hanzo
{"title":"Luby Transform Coding Aided Iterative Detection for Downlink SDMA Systems","authors":"Chun-Yi Wei, Thanh Dang Nguyen, N. Wu, J. Akhtman, Lie-liang Yang, L. Hanzo","doi":"10.1109/SIPS.2007.4387580","DOIUrl":"https://doi.org/10.1109/SIPS.2007.4387580","url":null,"abstract":"A Luby Transform (LT) coded downlink Spatial Division Multiple Access (SDMA) system using iterative detection is proposed, which invokes a low-complexity near-Maximum-Likelihood (ML) Sphere Decoder (SD). The Ethernet-based Internet section of the transmission chain inflicts random packet erasures, which is modelled by the Binary Erasure Channel (BE), while the wireless downlink imposes both fading and noise. A novel Log-Likelihood Ratio based packet reliability meric is used for identifying the channel-decoded packets, which are likely to be error-infested. Packets having residual errors must not be passed on to the LT decoder for the sake of avoiding LT-decoding-induced error propagation. The proposed scheme is capable of maintaining an infinitesimally low packet error ratio in the downlink of the wireless Internet for Eb/N0 values in excess of about 3dB.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"176 1","pages":"397-402"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79779220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Symbol Error Probability Analysis of an FFH/MFSK Receiver with Noise-Normalization Combining in a Fading Channel with Partial-Band Jamming 部分频带干扰下衰落信道中噪声归一化组合FFH/MFSK接收机的符号误差概率分析
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387576
Jian Zheng, Yi-Sheng Zhu, Li-ping Zhu
{"title":"Symbol Error Probability Analysis of an FFH/MFSK Receiver with Noise-Normalization Combining in a Fading Channel with Partial-Band Jamming","authors":"Jian Zheng, Yi-Sheng Zhu, Li-ping Zhu","doi":"10.1109/SIPS.2007.4387576","DOIUrl":"https://doi.org/10.1109/SIPS.2007.4387576","url":null,"abstract":"A new analysis method for the error performance analysis of Nakagami-fading channels is proposed. Two forms of the bit error rate (BER) expressions are derived for a noncoherent fast frequency-hopped M-ary orthogonal frequency-shift-keying (FFH/MFSK) spread spectrum (SS) receiver over frequency non-selective slow Nakagami-fading channels. The FFH/MFSK system employs noise-normalization combining in the presence of partial-band interference (PBI) and additive white Gaussian noise (AWGN). The probability density function (pdf) and characteristics function (CF) based approaches are used for analysis of the error performance. Numerical results show the effects of arbitrarily values of fading parameter and diversity level on system performance.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"48 1","pages":"377-381"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81514500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Low Complexity Real-Time Video Transcoders for Video Upload and Retrieval Applications 用于视频上传和检索应用的低复杂度实时视频转码器
Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387574
K. Ozawa, Hironori Ito, Kazuteru Watanabe, Kazuhiro Koyama, A. Murashima
{"title":"Low Complexity Real-Time Video Transcoders for Video Upload and Retrieval Applications","authors":"K. Ozawa, Hironori Ito, Kazuteru Watanabe, Kazuhiro Koyama, A. Murashima","doi":"10.1109/SIPS.2007.4387574","DOIUrl":"https://doi.org/10.1109/SIPS.2007.4387574","url":null,"abstract":"This paper proposes low complexity real-time video transcoders for video upload and retrieval applications. The proposed transcoders consist of both picture type conversion and syntax conversion in the compressed domain, and can highly reduce the computation amount in comparison with that of the conventional tandem transcoding method, in which decoding and re-encoding are necessary. The proposed syntax conversion can provide loss-less conversion, while the conventional tandem method is lossy conversion. Timestamp adjustment method is also proposed to avoid audio visual de-synchronization problem due to picture type conversion, when the stream is transmitted via constant bandwidth network. Complexity evaluation results based on DSP implementation confirm that the complexity of the proposed transcoders is very low and is less than 1/3 of that of the conventional tandem transcoder.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"1 1","pages":"368-372"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81601245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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