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

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High efficient hardware allocation framework of arbitrary inverse transform coding blocks in H.265 H.265中任意反变换编码块的高效硬件分配框架
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432732
Chi-Chia Sun, Heng-Chi Lai, Sin-Kun Lin, M. Sheu, Mladen Berekovic
{"title":"High efficient hardware allocation framework of arbitrary inverse transform coding blocks in H.265","authors":"Chi-Chia Sun, Heng-Chi Lai, Sin-Kun Lin, M. Sheu, Mladen Berekovic","doi":"10.1109/ISPACS.2015.7432732","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432732","url":null,"abstract":"In this paper, a high efficient arbitrary transform blocks hardware allocation framework is proposed, which can adapt the prediction tree structure and then improve the utilization ratio as well as a parallel hardware design to improve the data throughput. This method will configure an appropriate combination of five different size inverse transform units: Fast IDST, 4×4 IDCT, 8×8 IDCT, 16×16 IDCT and 32×32 IDCT. If the input video stream changed, it will reconfigure the combination and allocated the hardware resources to retain a high utilization ratio in hardware framework. Experiments show that the performance of the proposed method is improved from 48.8% to 96.2% under various conditions. The proposed method can enhance the efficiency of H.265 decoder.","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":"128731383","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
Minimum Euclidean distance for continuous phase modulation with time-limited phase shaping pulses 用限时相位整形脉冲连续相位调制的最小欧氏距离
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432846
Richard Hsin-Hsyong Yang, Chia-Kun Lee
{"title":"Minimum Euclidean distance for continuous phase modulation with time-limited phase shaping pulses","authors":"Richard Hsin-Hsyong Yang, Chia-Kun Lee","doi":"10.1109/ISPACS.2015.7432846","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432846","url":null,"abstract":"Recently, CPM signals employ information sequence with time-limited phase shaping pulse (CPM-TL) have been shown to achieve power and bandwidth efficient transmission. It is well known that minimum Euclidean distance could be used to estimate the error performance of CPM for moderate and large signal to noise ratio. In this paper, we further investigate the minimum Euclidean distance of CPM-TL with more time-limited phase shaping pulses (PSP) and compared with conventional CPM with time-unlimited PSP (CPM-TU). CPM-TL scheme has the advantages that any real number modulation index (h) could be applied and the resultant trellis structure of CPM guarantees the maximum constraint length allowed by the number of states in the MLSD receiver. Previous work showed that conventional CPM schemes with h > 1 could not achieve larger Euclidean distance with bandwidth expansion. However, we found that CPM-TL scheme could obtain significantly larger Euclidean distance for h > 1. Good CPM-TL schemes outperform previous work are given for the same complexity and similar bandwidth with up to 5 dB coding gain over MSK. Also, CPM-TU schemes have weak modulation indexes for all the PSP and modulation levels yet numerical results show that CPM-TL schemes with odd constraint length have no weak modulation index in many cases.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"66 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":"122536689","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 simplified statistical analysis of the Affine Projection Algorithm 仿射投影算法的简化统计分析
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432836
S. Koike
{"title":"A simplified statistical analysis of the Affine Projection Algorithm","authors":"S. Koike","doi":"10.1109/ISPACS.2015.7432836","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432836","url":null,"abstract":"This paper develops a statistical analysis of the Affine Projection Algorithm (APA) for adaptive filters to theoretically calculate filter convergence behavior. Assuming that the number of tap weights of the adaptive filter is sufficiently large, we derive simple difference equations that only require matrix computations. In experiments with some examples, it is observed that simulated and theoretically calculated filter convergence curves are generally in good agreement that justifies the approximations used and shows the validity of the analysis for practical use.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"46 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":"124303793","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
Spatial performance of color clustered VLC-MIMO due to incompleteness of color filters 彩色滤波器不完备性对彩色聚类VLC-MIMO空间性能的影响
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432807
Kotaro Abe, C. Ahn, T. Omori, K. Hashimoto
{"title":"Spatial performance of color clustered VLC-MIMO due to incompleteness of color filters","authors":"Kotaro Abe, C. Ahn, T. Omori, K. Hashimoto","doi":"10.1109/ISPACS.2015.7432807","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432807","url":null,"abstract":"Recently, visible light communication(VLC) is widely researched due to the spreading of LED usage. It satisfies demands of ubiquity and high speed communication. However, it is impossible to transmit the phase information and frequency information due to limitation of LED. From this reason, the achievable transmission rate is worse than that of wireless communications. To solve this problem, color clustered MIMO(multiple-input multiple-output) system that takes advantage of independency of the three primary colors of the light has been proposed. However, color filters which use on this system are supposed ideal one that extracts only a desired signal. Realistic color filters have the incompleteness which extract signals except a desired signal. Therefore, in this paper, we evaluate and clarify the spatial performance of color clustered VLC-MIMO system with incompleteness of color filters.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"28 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":"125638725","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
An application of OFDM-IDMA to uplink multiuser visible light communication system OFDM-IDMA在上行多用户可见光通信系统中的应用
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432806
Asato Kuriharat, C. Ahn, T. Omori, K. Hashimoto
{"title":"An application of OFDM-IDMA to uplink multiuser visible light communication system","authors":"Asato Kuriharat, C. Ahn, T. Omori, K. Hashimoto","doi":"10.1109/ISPACS.2015.7432806","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432806","url":null,"abstract":"Wireless visible light communication system uses LED illumination for data transmission. It is important for a performance index to evaluate a variation of communication quality with the number of users. Although CDMA (Code Division Multiple Access) is a representative of a conventional multiple access in a wireless communication, the maximum number of users is limited due to the length of the spread code, ISI (Inter-Symbol Interference) and MAI (Multiple Access Interference). To solve these problems, we propose the OFDM-IDMA (Orthogonal Frequency Division Multiplexing - Interleave Division Multiple Access), which has robustness for the above-mentioned problems. Moreover, we can improve the robustness by using multi carrier modulation. Therefore we apply the OFDM-IDMA system to visible light communication system. The simulation result shows that BER performance of an optical OFDM-IDMA with multiuser situation is the approximately same as that of single user.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"197 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":"129031596","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: 6
On high efficient cloud video transcoding 关于高效的云视频转码
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432759
J. Huang, Chung-Yi Wu, Jiann-Jone Chen
{"title":"On high efficient cloud video transcoding","authors":"J. Huang, Chung-Yi Wu, Jiann-Jone Chen","doi":"10.1109/ISPACS.2015.7432759","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432759","url":null,"abstract":"A multimedia server has to provide bandwidth compatible best QoS perception for end users. It has to perform transcoding to serve users under different network environments and with different devices. In this paper, we proposed a stability-driven hierarchical scheduling algorithm for a cloud-based video streaming system to speed up the video transcoding process for real-time service applications. It helps to coordinate the system operations and dynamically adjust the number of slots so that the cloud clusters can finish the process more efficiently. Experimental results showed that the proposed scheduling control methods help to maintain good system load balancing. The resource utilization of the entire cloud clusters can be as high as 98%, and the total transcoding time can be reduced by 10%-19%.","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":"132272662","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
Wireless protocol design for smart home on mesh wireless sensor network 基于网状无线传感器网络的智能家居无线协议设计
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432816
Maulana Yusuf Fathany, T. Adiono
{"title":"Wireless protocol design for smart home on mesh wireless sensor network","authors":"Maulana Yusuf Fathany, T. Adiono","doi":"10.1109/ISPACS.2015.7432816","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432816","url":null,"abstract":"This paper proposes a formulation scheme for communication data protocol at the application layer that can adapt to heterogeneous smart objects which may arise in the case of Smart Home application. Mesh-based design WSN is an attempt to realize the Smart Home concept, where DigiMesh topology is chosen as the basic topology in experimental setup of WSN. Mobile device is the main object as monitoring and controlling devices. Mapping the address and description of each bit in a predetermined protocol, then can be implemented in various condition. With the dynamic characteristics of the design of this protocol, the power cost can be reduced to a minimum. Protocol design has been successfully tested in scenario of monitoring and controlling function. Application of the CheckSum method is also reported to help in the detection error of data packet.","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":"123159568","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: 32
Low complexity receiver for continuous phase modulation using 3RC-TL phase shaping pulses 采用3RC-TL相位整形脉冲的低复杂度连续相位调制接收机
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432844
Richard Hsin-Hsyong Yang, Ming-Tsai Lee, Chia-Kun Lee, Shiunn-Jang Chern
{"title":"Low complexity receiver for continuous phase modulation using 3RC-TL phase shaping pulses","authors":"Richard Hsin-Hsyong Yang, Ming-Tsai Lee, Chia-Kun Lee, Shiunn-Jang Chern","doi":"10.1109/ISPACS.2015.7432844","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432844","url":null,"abstract":"In our previous work, we presented an alternative continuous phase modulation (CPM) scheme using time-limited phase shaping pulses (PSP), named as the CPM-TL. It could achieve large coding gains over conventional CPM using time-unlimited PSP (CPM-TU) in many cases. Also, we found a useful class of binary CPM-TL schemes that employed time-limited raised cosine (RC) PSP, with pulse width equal to 3, denoted as 3RC-TL of CPM scheme. It has large coding gains over the Minimum Shift Keying (MSK) and Gaussian MSK (GMSK) that are two of most popular modulators among the family of CPM-UT scheme. The MSK and GMSK modulators of CPM-TU scheme are known to have lower complexity in receiver design and excellent power-bandwidth performance. Basically, the optimal receiver of the 3RC-TL CPM scheme requires more complexity than the MSK or GMSK (using suboptimum receiver). In this paper, we deal with the reduce-complexity problem in receiver design for the 3RC-TL of CPM-TL scheme. To do so, we decompose the CPM-TL signal into a set of pulse-amplitude modulated (PAM) waveforms, using Euler's formula, which is different from the one suggested by Laurent in 1986. We show that the complexity of PAM-based 3RC-TL receiver can be simplified, and to be implemented with the Viterbi algorithm (VA) that contains two-PAM waveforms and two states. Similarly, we also compare with the GMSK (BT=0.25) using the PAM-based receiver, that required only one PAM waveform and two states, or two PAM waveforms and four states. We found that 3 RC-TL of CPM scheme has 2.5~3.45 dB coding gains over the GMSK with simplified PAM-based receiver.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"8 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":"114545670","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 novel robust informed watermarking approach and tamper detection based on weber differential excitation descriptor 一种基于韦伯微分激励描述子的鲁棒知情水印和篡改检测方法
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432764
M. AlShaikh, L. Laouamer, Laurent Nana, A. Pascu
{"title":"A novel robust informed watermarking approach and tamper detection based on weber differential excitation descriptor","authors":"M. AlShaikh, L. Laouamer, Laurent Nana, A. Pascu","doi":"10.1109/ISPACS.2015.7432764","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432764","url":null,"abstract":"We aim through this paper to present a semi blind and informed watermarking approach based on Weber differential descriptor to build a watermark from the original image by achieving robustness and also detecting the tampered zones. We divide the original image into n by m blocks and the centered pixel is chosen to be concerned for watermark embedding in the spatial domain. The tamper detection is proved into tampered watermarked image by comparing the extracted watermark after attacks with the original watermark image. We focused also through this approach on the watermarking robustness and tested it against different scenario of attacks. The experimental results show the perfect covering of tamper issue and also the watermark robustness.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"35 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":"117295400","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
Cryptanalysis of an ADC-based Random Number Generator from a chaotic oscillator 基于adc的混沌振荡器随机数发生器的密码分析
2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) Pub Date : 2015-11-01 DOI: 10.1109/ISPACS.2015.7432793
Salih Ergun
{"title":"Cryptanalysis of an ADC-based Random Number Generator from a chaotic oscillator","authors":"Salih Ergun","doi":"10.1109/ISPACS.2015.7432793","DOIUrl":"https://doi.org/10.1109/ISPACS.2015.7432793","url":null,"abstract":"The presented work introduces the algebraic cryptanalysis of an Analog-Digital Converter (ADC) based Random Number Generator (RNG) utilizing a chaotic oscillator. The proposed attack system focuses on discovering the weak points of ADC-based RNG from security point of view. The master-slave synchronization scheme is utilized to prove the convergence of the proposed attack system. Here, the RNG structure and the observed scalar time series of the target chaotic oscillator are the only available information for cryptanalysis. The feasibility of the proposed attack system is verified by presenting numerical and simulation results. The RNG, does not fulfill the Big Crush and Diehard statistical test suites, additionally the previous and the following bits are predictable. Moreover, the same bit sequence of the RNG can be generated.","PeriodicalId":238787,"journal":{"name":"2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"31 18_suppl 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":"116789593","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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