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2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)最新文献

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A multi-channel high precision current matching LED Driver for intelligent dimming 用于智能调光的多通道高精度电流匹配LED驱动器
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432760
Poki Chen, Hsien-Chih Liu, Ya-Wen Yang, Ya-Ying Li, F. Budiman
{"title":"A multi-channel high precision current matching LED Driver for intelligent dimming","authors":"Poki Chen, Hsien-Chih Liu, Ya-Wen Yang, Ya-Ying Li, F. Budiman","doi":"10.1109/ISPACS.2015.7432760","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432760","url":null,"abstract":"In this paper, a LED Driver with precise current matching is proposed. Through the help of artful layout schemes, the accurately matched LED currents are achieved with high tolerance to process, temperature and voltage (PVT) variations. Even with high voltage MOSFETs, the maximum current mismatch among LED channels is measured to be merely -0.385%~0.372% which is almost one-order better than those of the conventional ones. The temperature coefficient of this circuit is as low as 20ppm/°C over -40°C ~125°C range for 20mA LED driving current. This circuit was fabricated in TSMC 0.25μm 1P3M process with a chip size of 1.15*1.9mm2.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129458911","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: 2
Digital image watermarking against photo to cartoon effects 数字图像水印针对照片到卡通效果
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432768
Piyanart Chotikawanid, T. Amornraksa
{"title":"Digital image watermarking against photo to cartoon effects","authors":"Piyanart Chotikawanid, T. Amornraksa","doi":"10.1109/ISPACS.2015.7432768","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432768","url":null,"abstract":"This paper presents an image watermarking method against photo to cartoon effects based on the modification of reflectance component of a host color image. In the embedding process, the reflectance component of the saturation color component in HSV color space of a host image is used to convey a same size binary watermark. In the extraction process, each embedded bit is blindly extracted by subtracting the predicted original reflectance component from the watermarked one. The quality of watermarked image is evaluated by weighted peak signal-to-noise ratio (wPSNR), while the accuracy of extracted watermark is evaluated by normalized correlation (NC). The performance of the proposed method is evaluated and compared with the previous watermarking method. The results show improvement in terms of NC at comparable wPSNR under various types of photo to cartoon effects.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123530938","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
Layered lossless video coding based on Slepian-Wolf theorem 基于Slepian-Wolf定理的分层无损视频编码
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432852
T. Nakachi, T. Fujii
{"title":"Layered lossless video coding based on Slepian-Wolf theorem","authors":"T. Nakachi, T. Fujii","doi":"10.1109/ISPACS.2015.7432852","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432852","url":null,"abstract":"In this paper, we propose a layered lossless video coding scheme based on the Slepian-Wolf (SW) theorem. Motion JPEG2000 is performed as the base layer coder for real-time streaming and a SW coder is used as the enhancement layer coder. The computation burden is shifted to the network side so this scheme achieves low-complexity encoding. The proposed SW coder significantly improves the prediction accuracy of Side Information (SI). In addition to accurate prediction, SW exploits Discrete Wavelet Transform (DWT) to improve lossless coding performance. Simulation results show that the proposed scheme gives higher coding performance than the existing JPEG2000 lossless mode.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114842351","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
Development of multimedia system for supporting education in rural areas 农村多媒体辅助教育系统的开发
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432850
Y. Bandung, Harry Chandra Tanuwidjaja, L. B. Subekti, K. Mutijarsa
{"title":"Development of multimedia system for supporting education in rural areas","authors":"Y. Bandung, Harry Chandra Tanuwidjaja, L. B. Subekti, K. Mutijarsa","doi":"10.1109/ISPACS.2015.7432850","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432850","url":null,"abstract":"In Indonesia, the condition of education still tends to be unbalanced. The quality of education in urban areas is generally far better than the quality of education in rural areas. Education processes in rural areas face some problems like limited teaching resources, slight teaching tools, and monotonous teaching method. Therefore, an idea is emerged, a thinking to create a system in order to improve the quality of education in rural areas. Virtual Classbox 4.1 is a distance learning system developed to improve the quality of education in rural areas with video conferencing technology. Virtual Classbox 4.1 is designed based on Design Science in Information System Research. In order to produce a great system, a scientific guidance must be used. Remarkable system need astounding design, like a good house needs a strong foundation. Because of that, Design Science in Information System Research, which is very well known in information system design research world, is used.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114863297","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: 4
Downlink NOMA with SIC using unified user grouping for non-orthogonal user multiplexing and decoding order 采用统一用户分组的SIC下行NOMA，实现非正交用户复用和解码顺序
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432825
Keita Yakou, K. Higuchi
{"title":"Downlink NOMA with SIC using unified user grouping for non-orthogonal user multiplexing and decoding order","authors":"Keita Yakou, K. Higuchi","doi":"10.1109/ISPACS.2015.7432825","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432825","url":null,"abstract":"In this paper, we propose a practical method for user grouping and decoding-order setting in a successive interference canceller (SIC) for downlink non-orthogonal multiple access (NOMA). While the optimal user grouping and decoding order, which depend on the instantaneous channel conditions among users within a cell, are assumed in previous work, the proposed method uses user grouping and a decoding order that are unified among all frequency blocks. The proposed decoding order in the SIC enables the application of NOMA with a SIC to a system where all the elements within a codeword for a user are distributed among multiple frequency blocks (resource blocks). The unified user grouping eases the complexity in the SIC process at the user terminal. The unified user grouping also reduces the complexity of the efficient downlink control signaling in NOMA with a SIC. The unified user grouping and decoding order among frequency blocks in principle reduce the achievable throughput compared to the optimal one. However, based on numerical results, we show that the proposed method does not significantly degrade the system-level throughput in downlink cellular networks.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126248525","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: 15
Hierarchical inter mode decision for HEVC HEVC的分层模式间决策
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432853
Huanqang Zeng, Wenjie Xiang, C. Cai, J. Chen, K. Ma
{"title":"Hierarchical inter mode decision for HEVC","authors":"Huanqang Zeng, Wenjie Xiang, C. Cai, J. Chen, K. Ma","doi":"10.1109/ISPACS.2015.7432853","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432853","url":null,"abstract":"The newest video coding standard-high efficiency video coding (HEVC) can achieve higher coding efficiency, but at the expense of tremendous computational complexity. To address this problem, a fast inter mode decision algorithm, called the hierarchical inter mode decision (HIMD), is proposed in this paper. For each coding tree unit (CTU), the proposed HIMD algorithm determines the optimal mode in time by checking the early termination condition, which is developed based on the observation that the relationship between the rate-distortion (RD) cost and the size of prediction mode is a uni-modal function (only one minimum value). Experimental results have shown that compared with the exhaustive mode decision in HEVC, the proposed HIMD algorithm is able to achieve a reduction of computational complexity by 45.81% on average, while incurring only 0.07dB loss in Bjontegaard delta peak signal-to-noise ratio (BDPSNR) and 2.04% increment on the Bjontegaard delta bit rate (BDBR).","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130268715","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: 2
Establishment of Wi-Fi Display session between source and sink device in wireless Android screencasting Android无线截屏源和接收设备之间Wi-Fi显示会话的建立
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432854
Yacob W. Sitorus, Gabriel Frans, Prasetiyo, T. Adiono, A. H. Salman, Nur Ahmadi
{"title":"Establishment of Wi-Fi Display session between source and sink device in wireless Android screencasting","authors":"Yacob W. Sitorus, Gabriel Frans, Prasetiyo, T. Adiono, A. H. Salman, Nur Ahmadi","doi":"10.1109/ISPACS.2015.7432854","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432854","url":null,"abstract":"Wireless technology has been rapidly developing. Wi-Fi Alliance several years ago presented Wi-Fi Direct, a new feature that makes it possible to connect devices using ad-hoc network. Since then this technology has been developed and now comes Wi-Fi Display (WFD). This technology is utilized to implement the system of wireless Android screencasting. This system will cast/mirror the Android screen to other screen using a wireless connection. To establish the WFD session, there are respectively two processes: The Wi-Fi Direct connection establishment and the negotiation process.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131078749","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
Adaptive sky detection and preservation in dehazing algorithm 消雾算法中的自适应天空检测与保存
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432849
S. Dai, Jean-Philippe Tarel
{"title":"Adaptive sky detection and preservation in dehazing algorithm","authors":"S. Dai, Jean-Philippe Tarel","doi":"10.1109/ISPACS.2015.7432849","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432849","url":null,"abstract":"Single image defogging and/or dehazing algorithms usually emphasize the small intensity variations of the sky, when it is heterogeneous. This leads to a dramatic aspect of the restored image. This sky problem is probably one of the biggest defects of all the state-of-the-art dehazing algorithms. It was proposed to handle the sky problem by hard or smooth threshold of the sky area and to process the detected sky area differently not to emphasize too much the contrast of the sky heterogeneity. But the threshold value needed to be set by the user. We thus here propose a rule for selecting the threshold value as a function of the histogram of the image to process. This rule shows nice improvements on different kinds of images as shown in our experiments on a database of 1500 images.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133519273","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: 14
Analysis method of periodic solution using Haar wavelet transform for autonomous nonlinear circuits 自主非线性电路周期解的Haar小波变换分析方法
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432775
Tatsuya Nakabayashi, M. Mochizuki, S. Moro
{"title":"Analysis method of periodic solution using Haar wavelet transform for autonomous nonlinear circuits","authors":"Tatsuya Nakabayashi, M. Mochizuki, S. Moro","doi":"10.1109/ISPACS.2015.7432775","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432775","url":null,"abstract":"Recently, much attemtion has been paid to the methods for circuit analysis using wavelet transform. In particular, we have proposed the analysis methods using Haar wavelet transform. Haar wavelet can be easily treated, be adapted to time varying and nonlinear circuits and we can be easily derived differential and integral operator matrices by using block pulse functions. Furthermore, it can analyze a region near singular points more precisely. Therefore, we consider that it is suitable to analyze nonlinear time-varying circuits. In this paper, we propose the method to analyze the numerical solution of the periodic solution of the autonomous nonlinear circuit.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132765021","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: 7
Performance evaluation for AF relay TFI-OFDM systems AF中继TFI-OFDM系统的性能评价
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432832
Y. Ida, Kota Imafuku, Takahiro Matsumoto, S. Matsufuji
{"title":"Performance evaluation for AF relay TFI-OFDM systems","authors":"Y. Ida, Kota Imafuku, Takahiro Matsumoto, S. Matsufuji","doi":"10.1109/ISPACS.2015.7432832","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432832","url":null,"abstract":"Amplify-and-forward (AF) relay transmissions can achieve a low power long distance communication. The problem of the AF method is that the channel state information (CSI) between source-relay (SR) and relay-destination (RD) should be obtained simultaneously in the destination node. The pilot signal is inserted to obtain the CSI, and the time frequency interferometry (TFI) method can reduce the number of pilot signals and the channel estimation (CE) power. This paper proposes the low power CE for AF relay transmissions in an orthogonal frequency division multiplexing based on the TFI method.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126003613","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
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