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

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Adaptively compensated multiband spectral subtraction for robust noise reduction 自适应补偿多波段谱减法鲁棒降噪
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432753
B. Rohman, C. Wael, K. Paramayudha
{"title":"Adaptively compensated multiband spectral subtraction for robust noise reduction","authors":"B. Rohman, C. Wael, K. Paramayudha","doi":"10.1109/ISPACS.2015.7432753","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432753","url":null,"abstract":"An adaptively compensated multiband spectral subtraction (MBSS) is presented in this paper. In this research, the adaptive compensation in the MBSS utilizes artificial neural network. The purpose of this compensation is to improve the quality of speech signal after denoising of MBSS step. This compensation is calculated adaptively depend on the MBSS parameters, estimated noise, and difference between input and estimated speech signal. The neural network used was Multi-Layer Perceptron consisted of three hidden layers. The proposed neural network was trained by three speech signals contaminated by white gaussian noises with SNR 0dB and 30dB. For investigating the performance, the proposed method was tested by five noised speech signals with SNR 0dB to 10dB. The result of experiment is examined and evaluated by SNR and PESQ scores. Based on the examination, the proposed speech enhancement method exposed the better performance than the origin MBSS algorithm.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"47 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":"116973538","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
Resource allocation for device-to-device communications based on graph-coloring 基于图形着色的设备间通信资源分配
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432814
Changhee Lee, Sung-Min Oh, Jaesheung Shin
{"title":"Resource allocation for device-to-device communications based on graph-coloring","authors":"Changhee Lee, Sung-Min Oh, Jaesheung Shin","doi":"10.1109/ISPACS.2015.7432814","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432814","url":null,"abstract":"In device-to-device (D2D) systems, neighboring D2D pairs provide unavoidable interference when a same resource is allocated to multiple D2D pairs. And, this interference acts as a major bottleneck which significantly deteriorates the link quality and prevents from achieving the spatial reuse gain. Hence, in this paper, we introduce the graph-coloring theory and propose a resource allocation algorithm for D2D systems in order to properly avoid dominant interference from neighboring D2D pairs. Throughout simulations results, we show that the proposed scheme provides fairly good performance compared to the optimal resource allocation, while drastically reducing the computational complexity, and performance gain over conventional schemes with respect to sum rate of D2D pairs. Moreover, the results on the outage probability illustrate that the proposed scheme improves the link quality compared to that of conventional schemes.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"24 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":"115513145","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: 5
Performance evaluation of concatenated coding with diversity reception for body area network 体域网分集接收级联编码性能评价
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432819
B. Sansoda, S. Choomchuay
{"title":"Performance evaluation of concatenated coding with diversity reception for body area network","authors":"B. Sansoda, S. Choomchuay","doi":"10.1109/ISPACS.2015.7432819","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432819","url":null,"abstract":"In wireless communication, it is of significance that the receiving information should be identical to the transmitted information. With this regards, an application of error correction coding (ECC) is one suitable method for maintaining the information precision between the transmission channels. With similar objectives, the diversity techniques are used to moderate the devaluation in the error performance due to the fading impairment by using multiple communication branches. This paper, we propose the application of concatenate codes combined with space diversity technique as maximal ratio combining. We focused on the bit error rate (BER) performance and the impact of Rician fading channel on wireless body area network (WBAN). The finding shows that the proposed scheme can provide considerable improvement on the BER performance compared with that of the traditional system. The concatenate code with MRC outperformed conventional ones, either RS or convolutional codes. At 10-4 of BER, the designed scheme is better than RS code by 1.3 dB and convolutional code by 2.2 dB.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"79 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":"114731638","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
Virtual prototyping of DSP systems using a PSV-S approach 使用PSV-S方法的DSP系统虚拟样机
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432840
A. Langi
{"title":"Virtual prototyping of DSP systems using a PSV-S approach","authors":"A. Langi","doi":"10.1109/ISPACS.2015.7432840","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432840","url":null,"abstract":"Virtual prototyping is natural in developing DSP systems using a product-service-value system (PSV-S) approach. Our DSP virtual prototyping approach consists of four development phases: (1) a generic DSP system, (2) a functional DSP system, (3) an architectural DSP system, and (4) a real-time DSP system. Such an approach results in a more comprehensive approach in DSP system development. The paper shows an example of prototyping a voice codec on single chip DSP processor.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"44 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":"125571199","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
On a robust ASR based on robust complex speech analysis 基于鲁棒复杂语音分析的鲁棒ASR
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432751
Keita Higa, K. Funaki
{"title":"On a robust ASR based on robust complex speech analysis","authors":"Keita Higa, K. Funaki","doi":"10.1109/ISPACS.2015.7432751","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432751","url":null,"abstract":"The European Telecommunications Standards Institute (ETSI) standardized the advanced front-end (AFE) for automatic speech recognition (ASR). In the AFE a speech enhancement is realized by an iterative Wiener filter (IWF) in which a smoothed FFT spectrum over adjacent frames is used to design the filter. On the other hand, we have previously proposed robust time-varying complex AR (TV-CAR) speech analysis and evaluated the performance of speech processing such as F0 estimation and speech enhancement. TV-CAR analysis can estimate more accurate spectrum than FFT, especially in low frequencies because of the nature of the analytic signal. In addition, TV-CAR can estimate more accurate speech spectrum against additive noise. In this paper, a time-invariant version of wide-band TV-CAR analysis based on robust Extended Least Square (ELS) approach is introduced to the IWF in the AFE and is evaluated using the CENSREC-2 database.","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":"125818503","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 design of Transimpedance Amplifier using OTA as a feedback resistor for patch-clamp measurement system 一种采用OTA作为反馈电阻的跨阻放大器的设计
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432786
M. Kubo, Hiroki Yotsuda, T. Kosaka, N. Nakano
{"title":"A design of Transimpedance Amplifier using OTA as a feedback resistor for patch-clamp measurement system","authors":"M. Kubo, Hiroki Yotsuda, T. Kosaka, N. Nakano","doi":"10.1109/ISPACS.2015.7432786","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432786","url":null,"abstract":"Patch-clamp system is commonly used to measure ion current flowing through ion channel on cell membrane. By integration of this system, it is realized high density multi-channel system. In this paper, we designed Transimpedance Amplifier (TIA) in a patch-clamp system for single channel recording. Proposed TIA use OTA (Operational Transconductance Amplifier) as a feedback resistor, the size of TIA is drastically decreased compare to previously designed TIA using poly silicon resistor. The system was fabricated using the 0.18μm CMOS process. The designed size is 200 μm by 70 μm. We confirmed by simulation and measurement that the TIA has enough performance for single channel recording. The value of OTA resistance is variable from 5 MΩ to 500 MΩ by adjusting bias voltage. The bandwidth covers at least 10.3 kHz. Input-referred noise is 0.86 pArms in bandwidth that is extremely small value in on-chip transimpedance amplifiers for patch-clamp method. Power consumption of the TIA is 52.3 μW. Input range is ±50 pA when the value of resistance is 500MΩ.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"19 5 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":"126052369","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
A CMOS image sensor with analog pre-processing capability suitable for smart camera applications 具有模拟预处理能力的CMOS图像传感器，适用于智能相机应用
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432780
C. Soell, Lan Shi, Andreas Baenisch, T. Ussmüller, R. Weigel
{"title":"A CMOS image sensor with analog pre-processing capability suitable for smart camera applications","authors":"C. Soell, Lan Shi, Andreas Baenisch, T. Ussmüller, R. Weigel","doi":"10.1109/ISPACS.2015.7432780","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432780","url":null,"abstract":"This work presents a novel CMOS sensor which is suitable for analog image processing operations and describes the benefits of analog pre-processing over digital algorithms. All needed modifications to read out a spatial NxN pixel matrix simultaneously are presented regarding pixel wiring, row decoder and column multiplexer as well as descrambling the order of the outputs. The outputs are connected via a buffer stage to the analog pre-processing circuits. As an example for such an analog computation, an averaging filter is described from design constraints to the actual implementation. Simulation results show a very low current consumption of just 55.3 μA under worst-case conditions and a computation time below 200 ns. This corresponds to a power-time product ratio of 1:18.75 compared to a digital state-of-the-art implementation.","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":"126716846","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
Throughput performance of non-orthogonal multple access with joint detection in far user 远端联合检测非正交多址的吞吐量性能
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432830
Takahiro Yazaki, Y. Sanada
{"title":"Throughput performance of non-orthogonal multple access with joint detection in far user","authors":"Takahiro Yazaki, Y. Sanada","doi":"10.1109/ISPACS.2015.7432830","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432830","url":null,"abstract":"Non-orthogonal multiple access (NOMA) can share the same frequency band with multiple mobile devices. In the conventional NOMA scheme, the possible pairs of users are limited and this limitation reduces the amount of capacity improvement. This is because only the receiver in the near user cancels the signal of the other user and then detects the desired signal. In this paper, a joint detection scheme in the far user as well as the near user of the NOMA downlink is proposed. The throughput performance for multiple users with joint detection is evaluated through multi-cell system level simulation. Numerical results obtained through computer simulation show that the proposed scheme increases the system throughput by about 0.1 bit/subcarrier and also improves user fairness.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"12 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":"127486820","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
Lightness transform method considering visual feature of elderly person 考虑老年人视觉特征的亮度变换方法
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432738
Chiaki Ueda, T. Azetsu, N. Suetake, E. Uchino
{"title":"Lightness transform method considering visual feature of elderly person","authors":"Chiaki Ueda, T. Azetsu, N. Suetake, E. Uchino","doi":"10.1109/ISPACS.2015.7432738","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432738","url":null,"abstract":"It is known that the lenticular transmittance of elderly person is lower than that of young person. This low lenticular transmittance property causes the brightness decrease of the visual field of the elderly person. In this report, the lightness transform method of the image for the elderly person is proposed. In the proposed method, the colors, which are hard to see for the elderly person, are transformed into the colors, which are easy to see, by adding them the lightness contrast. The effectiveness of the proposed method is verified by some experiments.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"34 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":"121584972","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
Random-valued impulse noise removal in color images by using switching Non-local vector median filter 基于开关非局部矢量中值滤波的彩色图像随机脉冲噪声去除
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432727
Jyohei Matsuoka, Takanori Koga, N. Suetake, E. Uchino
{"title":"Random-valued impulse noise removal in color images by using switching Non-local vector median filter","authors":"Jyohei Matsuoka, Takanori Koga, N. Suetake, E. Uchino","doi":"10.1109/ISPACS.2015.7432727","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432727","url":null,"abstract":"This paper describes a novel image filtering method for removal of random-valued impulse noise superimposed on color images. In color image filtering, generally, it is preferable to deal with the R, G, and B components of each pixel of a color image as elements of a vectorized signal as in the vector median filter rather than component-wise signals in order to prevent color shift after filtering. Furthermore, in impulse noise removal, it is essential to use switching type filtering manner as in the switching median filter to preserve the detailed part of an original image with good quality. By taking those fundamentals in consideration, in this study, we propose a switching-type vector median filter with non-local processing mainly consists of a noise detection part and a noise removal one. Concretely, we propose a noise detector which proactively finds out noise-corrupted pixels by focusing attention on isolation tendencies of pixels of interest in difference images between RGB components. Furthermore, as a noise removal filter, we propose an extended version of Non-local median filter (NL-MF), which we proposed previously for grayscale images, named Non-local vector median filter (NL-VMF) which deals with color images. The proposed method realizes superior balance between the detail-preservation based on the proactive noise detection and the noise removal by the non-local switching vector median filtering. The effectiveness and the validity of the proposed method are verified by some experiments using natural color images.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"136 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":"122649260","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
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