2012 International Symposium on Intelligent Signal Processing and Communications Systems最新文献

{"title":"Digital game-based after-school-assisted learning system in English","authors":"Zhao-Heng Ma, Wu-Yuin Hwang, Shu-Yu Chen, Wei Ding","doi":"10.1109/ISPACS.2012.6473466","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473466","url":null,"abstract":"Some high school students lack a motivation to review the English vocabulary learning in second language after school. However, many studies have pointed out that the game-based learning (GBL) can improve students' learning motivations and effectiveness. We present a digital game-based learning system for high school students' after-school learning in English vocabulary. Teachers should only guide students playing the game and no teaching styles will be changed. In the whole process, students design the learning flash cards on Web by themselves, play learning flash card game on mobile device and they will reward for passing the test with the game cards. They have to play the mobile game with collecting or exchanging the game cards with other team members to finish the puzzle and get reward cards. Reward cards are used to exchange real pocket money from their parents or ask the teacher for scores.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121923003","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}

{"title":"L1-norm minimization in pixel recovery for H.264 video transmission","authors":"Ting-Lan Lin, Chang-Yi Fan, Gui-Xiang Huang, Wen-Chih Chen","doi":"10.1109/ISPACS.2012.6473500","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473500","url":null,"abstract":"We consider an application of sparse optimization in the error concealment area. State-of-the-art spatial and temporal error concealment method is improved and compared. By solving for limited numbers of significant predictors using the sparse optimization, our algorithm performs subjectively and objective better for the concealed result.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122136325","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}

{"title":"Consonant behavior of bone conducted speech in Japanese","authors":"Tatsuya Kato, T. Shimamura","doi":"10.1109/ISPACS.2012.6473538","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473538","url":null,"abstract":"Bone conducted (BC) speech can be used as a tool for speech communication in highly noisy environments. This is because BC speech is insensitive to ambient noise. On the other hand, BC speech possesses a serious problem that intelligibility of BC speech is lower than that of air conducted (AC) speech. From this point of view, the mainstream of BC speech studies was to improve the intelligibility of BC speech up to now. This has resulted in the fact that inherent properties of BC speech are not clarified. There are some reports in which how BC microphone locations with intensity or intelligibility of the recorded BC speech are related has been discussed. However, only BC vowels were treated there. Consonants have never been discussed. In this paper, we investigate consonant behavior of BC speech. Through experiments, we have found two tendencies of consonants of BC speech. One is that the amplitude of voiced consonants is larger, while that of unvoiced consonants is smaller. The other is about the manner of articulation. The amplitude of nasals is the largest. Plosives have larger amplitude and fricatives have smaller amplitudes than the other consonants.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124648063","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}

{"title":"Optimization of the hybrid asymmetric-FIR/analog square-root filters","authors":"Chia-Yu Yao, Yung-Hsiang Ho, Wei-Chun Hsia","doi":"10.1109/ISPACS.2012.6473518","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473518","url":null,"abstract":"This paper presents a method for designing asymmetric square-root (SR) FIR filters against the effects of jitter-induced interference at the receiver. The proposed method employs the linear programming to design the Nyquist filter coefficients for minimizing the power of the jitter-induced interference. The desired SR filter coefficients are obtained via the spectral factorization of the Nyquist filter polynomial. The proposed method takes the filter's stopband attenuation, the system's tolerable ISI, and the “roughness” of the analog/FIR-SR filter impulse response into account. Unlike previous publications, we show that the error-performance of a system employing a matched SR filter pair, in the presence of receiver timing jitter, is more strongly related to the roughness of the hybrid analog/FIR-SR filter's impulse response, than it is to the eye width caused by the Nyquist pulse. The design example validates the proposition that the proposed method can lead to improved error performance of a high-order QAM communication system in the presence of receiver clock jitter.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123634295","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}

{"title":"An efficient development of 3D surface registration by Point Cloud Library (PCL)","authors":"Cheng-Tiao Hsieh","doi":"10.1109/ISPACS.2012.6473587","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473587","url":null,"abstract":"This paper presents how to utilize the open source Point Cloud library (PCL) to develop a series of computational registration processes efficiently and robustly. The registration is the key process of the Digital Face-Inspection (DFI) system. In 2009, the DFI system was developed to assist dentists to detect deviations of patients' face shapes before/after an orthodontic treatment. The system combined the technologies of 3D scanning and Reverse Engineering together to achieve the goal of creating a better quality environment. Regarding the visual analysis made by the DFI system, dentists can adjust their treatments to guarantee that their treatments are on the right track. This is definitely very helpful to create a high-quality dental environment. The inputs of the DFI system are a set of point clouds generated by 3D scanning systems. The data type of point cloud present an object by a huge amount of surface points. A completed DFI process requires two scanning independent scanning routines and those scanning routines generated point cloud by their reference coordinate systems. This event causes that generated point clouds can't be applied into the deviation analysis directly. Before the analysis, the DFI system introduced the Iterative Closest Point (ICP) algorithm to align two point clouds as close as possible. This is to force two point clouds in a same coordinate system. However, the ICP algorithm is a local operation process. Therefore, a coarse registration is required for finding an optimal initial alignment. The registration includes a lot of computational algorithms and makes the DFI development very complicated. Fortunately, an open source called Point Cloud Library is available for helping us to develop this registration easily and efficiently. PCL collected hundreds of functions and algorithms for handling point cloud data in various applications. This paper demonstrates how to introduce PCL to build up the DFI system. In addition, we also presented how to utilize PCL to improve the efficiency of the DFI system.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114213858","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}

{"title":"Mean-sense behavior of filtered-X LMS algorithm in the presence of frequency mismatch","authors":"Jian Liu, Jinwei Sun, Yegui Xiao","doi":"10.1109/ISPACS.2012.6473514","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473514","url":null,"abstract":"Narrowband active noise control (ANC) systems are promising in suppressing sinusoidal noises, especially the lower frequency portion generated by rotating machines. In real-life applications, when a non-acoustic sensor is used to acquire the synchronization signal from which the primary noise frequencies are identified, the frequencies of reference sinusoids generated by the cosine wave generator usually contain errors due to sensor aging, fatigue accumulation, etc. That is frequency mismatch (FM) may exist between the reference signal and the primary noise. This paper analyzes performance degradation of the typical filtered-X LMS (FXLMS)-based narrowband ANC system in the presence of FM by investigating convergence of the system in the mean sense. The obtained analytical results enrich our understanding of influence of the FM on system performance. Computer simulations are conducted to verify the analysis results.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127916965","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}

{"title":"High-accuracy programmable timing generator with wide-range tuning capability","authors":"Ting-Li Chu, Sin-Hong Yu, Chorng-Sii Hwang","doi":"10.1109/ISPACS.2012.6473504","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473504","url":null,"abstract":"In this paper, a high-accuracy programmable timing generator with wide-range tuning capability is proposed. With the aid of dual delay-locked loop (DLL), both of the coarse and fine tuning mechanisms are operated in precise closed-loop scheme to lessen the effects of the ambient variations. The timing generator can provide sub-gate resolution and instantaneous switching capability. The circuit is implemented and simulated in TSMC 0.18 μm 1P6M technology. The test chip area occupies 1.9 mm2. The reference clock cycle can be divided into 128 bins by interpolation to obtain 14 ps resolution with the clock rate at 550 MHz. The INL and DNL are within -0.21~+0.78 and -0.27~+0.43 LSB, respectively.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121723553","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}

{"title":"Hardware design of the scalable video encoder for the multi-source digital home environment","authors":"Zong-Hong Li, Hsueh-Yi Lin, T. Tsai","doi":"10.1109/ISPACS.2012.6473572","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473572","url":null,"abstract":"In this paper, hardware realization of the scalable video compressor encoder is proposed to achieve the requirement of the multi-source digital home environment. The Proposed 2-D DWT architecture is composed of two 1-D DWT and internal buffer. Moreover, the parallel scanning method is realized to reduce the internal buffer size instead of the conventional line-based scanning method. On the other hand, a pipelined MQ encoder architecture is also proposed to increase the throughput. After the synthesis, the throughput of proposed hardware realization is 93.3M samples/sec by adopting 0.18 μm CMOS technology. The power dissipation is 48.22 mW under 100 MHz clock source. The throughput meets the requirement of real-time processing of a 720p/30 fps video sequence, demanded by the digital home environment.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131380503","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}

{"title":"Adaptive semiblind receiver for 3GPP LTE downlink MIMO-OFDM systems","authors":"S. Phrompichai","doi":"10.1109/ISPACS.2012.6473612","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473612","url":null,"abstract":"A suboptimal adaptive semiblind receiver is proposed for 3GPP LTE downlink MIMO-OFDM systems. The receiver directly detects data using frequency diversity of code division multiplexing technique and updating tap-weight vector exploits the contribution of information from pilot signal and data signal on the resource block mapping. The complex frequency-domain space-frequency received shift sub-resource block signal sequence matrix is formulated to take the diversity from MIMO-OFDM scheme and combats the effect of inter-carrier-interference. Numerical results show that performance of proposed adaptive semiblind receiver outperforms adaptive pilot-based receiver in term of BER over ITU MIMO Pedestrian A and Vehicular A in fast time varying frequency-selective fading channel models.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131969960","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}

{"title":"A configurable IP Core for arbitrary inverse quantized transforms with dynamic video resolutions","authors":"Chi-Chia Sun, Chun-Ying Lin, G. Jan","doi":"10.1109/ISPACS.2012.6473568","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473568","url":null,"abstract":"In this paper, a low-complexity IP Core based on the CORDIC algorithm is proposed for image/video decoding process in compatibility with the standard MPEG-4 Visual and the standard H.264/AVC. This, Inverse Discrete Cosine and Integer Transform (IDCIT), can be used to support multiplierless 1-D 8-point IDCT and 1-D 4-point/8-point inverse integer transforms. Meanwhile, the number for CORDIC iterations and compensation steps are adjustable in order to compensate the video compression quality. The implementations are embedded in public available software XVID Codes 1.2.2 for the standard MPEG-4 Visual and the H.264/AVC reference software JM 16.1, where the experimental results show that a trade-off between video compression quality in PSNR and computational complexity is obtained.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132907421","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}