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2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing最新文献

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Model-based interrelations of adaptive filter algorithms in acoustic echo control 声学回波控制中基于模型的自适应滤波算法的相互关系
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291246
G. Enzner
{"title":"Model-based interrelations of adaptive filter algorithms in acoustic echo control","authors":"G. Enzner","doi":"10.1109/PACRIM.2009.5291246","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291246","url":null,"abstract":"The design of fast learning and yet robust adaptive filters for acoustic echo control in hands-free voice communication has attracted the research community for decades. This paper presents a fresh and unified view of adaptive filter algorithms in order to change and to generalize some of the previously well-established paradigms. The unified understanding is achieved by introducing state-space dynamical echo path models which also resemble the real world characteristics of hands-free systems.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127143703","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
Characterization of single-port and multi-port collective communication operations on the Cell BE processor Cell BE处理器上单端口和多端口集体通信操作的特性
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291299
F. Khunjush, N. Dimopoulos
{"title":"Characterization of single-port and multi-port collective communication operations on the Cell BE processor","authors":"F. Khunjush, N. Dimopoulos","doi":"10.1109/PACRIM.2009.5291299","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291299","url":null,"abstract":"The main contributors to message delivery latency in message passing environments are the copying operations needed to transfer and bind a received message to the consuming process/thread. A significant portion of the software communication overhead is attributed to message copying. Recently, a set of factors has been leading high-performance processor architectures toward designs that feature multiple processing cores on a single chip (a.k.a. CMP). The Cell Broadband Engine (BE) shows potential to provide high-performance to parallel applications (e.g., MPI applications). An efficient implementation of collective communication operations is one of the key issues to reach high-performance and scalability in parallel applications. In this work, we implement several collective communications and investigate their performance in terms of latency and the associated components. For this, broadcast and total-exchange functions are implemented on the Cell BE processor.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129207036","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
Page replacement algorithm using swap-in history for remote memory paging 使用交换历史记录进行远程内存分页的页面替换算法
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291315
Kazu Saito, H. Midorikawa, M. Kai
{"title":"Page replacement algorithm using swap-in history for remote memory paging","authors":"Kazu Saito, H. Midorikawa, M. Kai","doi":"10.1109/PACRIM.2009.5291315","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291315","url":null,"abstract":"The Distributed Large Memory system, DLM, was designed to provide a larger size of memory beyond that of local physical memory by using remote memory distributed over cluster nodes. The original DLM adopted a low cost page replacement algorithm which selects an evicted page in address order. In the DLM, the remote page swapping is the most critical in performance. For more efficient swap-out page selection, we propose a new page replacement algorithm which pays attention to swap-in history. The LRU and other algorithms which use the memory access history generate more overhead for user-level software to record memory accesses. On the other hand, using swap-in history generates little costs. According to our performance evaluation, the new algorithm reduces the number of the remote swapping in the maximum by 32% and gains 2.7 times higher performance in real application, Cluster3.0. In this paper, we describe the design of the new page replacement algorithm and evaluate performances in several applications, including NPB and HimenoBmk.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121436759","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
A content-based Chinese speech document retrieval system design and implementation 一个基于内容的中文语音文档检索系统的设计与实现
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291386
C. Zhong, Z. Miao, Jie-lan Zhang, L. Du, D. Kang
{"title":"A content-based Chinese speech document retrieval system design and implementation","authors":"C. Zhong, Z. Miao, Jie-lan Zhang, L. Du, D. Kang","doi":"10.1109/PACRIM.2009.5291386","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291386","url":null,"abstract":"The rapid development of speech processing technology provides a potential for speech retrieval. This paper designs and implements a content-based Chinese speech document retrieval system using keyword spotting and text classification. In this system, a segment of unknown spontaneous speech will be converted into a series of keywords and then classified into a certain category, called topic, hoping to establish a retrieval model with two-level semantic information, which enables users to search for desired speech by keyword or topic query. Besides, based on the theory of mutual information, text classification is also used to react on the keywords to remove some false alarms. This paper mainly describes the structure, principle and completion situation of this retrieval system, finally gives the experimental results and discussions.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124342326","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
Fast texture synthesis via patch-based circular linked lists 通过基于补丁的循环链表快速纹理合成
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291313
Xiong Changzhen, Guo Fenhong
{"title":"Fast texture synthesis via patch-based circular linked lists","authors":"Xiong Changzhen, Guo Fenhong","doi":"10.1109/PACRIM.2009.5291313","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291313","url":null,"abstract":"A novel texture synthesis method is proposed to form large textures. The task of texture synthesis is divided into two phases: analysis, and synthesis. During the analysis phase, we generate patch-based circular linked lists (PCL) by recording the process of texture synthesis based on graph cuts. The main task of synthesis phase is to pick up patches and copy them to the output to synthesize textures using the PCL. The PCL algorithm synthesizes high-quality textures ranging from regular to stochastic. Compared with the jump map method, our approach is better capturing of texture characteristics and thus performs well when the jump map algorithm fails to produce good results.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117110420","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
Message recovery enhancements to LSB embedding and echo hiding based on T-Codes 基于t码的LSB嵌入和回波隐藏的消息恢复增强
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291371
S. Manoharan, S. Mitra
{"title":"Message recovery enhancements to LSB embedding and echo hiding based on T-Codes","authors":"S. Manoharan, S. Mitra","doi":"10.1109/PACRIM.2009.5291371","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291371","url":null,"abstract":"Steganography is the science of hiding messages within some cover media. The intent is usually covert communication, but steganography is equally applicable for digital watermarking of media. Messages can be hidden in any media. Echo hiding is a steganographic technique that hides messages in audio. This technique is known to be more robust to audio transformations and attacks than LSB embedding, a common and simple steganographic technique. This paper verifies the robustness of both LSB embedding and echo hiding, and proposes a scheme that improves it further. The improvement arises from the use of a self-synchronizing code set called the T-Codes to encode messages prior to their concealment.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132539773","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
Novel impairment-aware traffic engineering in all-optical networks 全光网络中新的损伤感知流量工程
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291380
R. Hayashi, K. Shimizu, I. Inoue, Kohei Sshiomoto
{"title":"Novel impairment-aware traffic engineering in all-optical networks","authors":"R. Hayashi, K. Shimizu, I. Inoue, Kohei Sshiomoto","doi":"10.1109/PACRIM.2009.5291380","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291380","url":null,"abstract":"We propose a novel traffic engineering (TE) technique that can readily handle impairments so as to satisfy quality-of-signal (QoS) requirements in alloptical networks. The existence of impairment limits the maximum transmission distance of optical signals given the need to satisfy QoS requirements. The problem is that impairment-aware route computation must consider many parameters and so is rather complicated. We, therefore, propose the new TEconstraint of “logical distance” which covers several impairment factors converted into distance. It reflects the degree of impairment created by external conditions, and a transmission distance constraint can be checked easily by summing up each element's distance. Logical distance makes it simple and effective to judge whether a computed route satisfies the desired QoS or not. We confirm the feasibility of our proposal by developing a TE system for a real optical network.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131514711","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
Improving robustness of precoded MIMO systems with imperfect channel estimation 改进信道估计不完全的预编码MIMO系统的鲁棒性
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291394
G. Colman, T. Willink
{"title":"Improving robustness of precoded MIMO systems with imperfect channel estimation","authors":"G. Colman, T. Willink","doi":"10.1109/PACRIM.2009.5291394","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291394","url":null,"abstract":"Low-rate feedback schemes have recently provided a means to achieve near optimal performance in multiple-input multiple-output communications systems while reducing feedback overhead to acceptable levels. In this paper, a bit-error rate expression for precoded systems is derived as a function of the channel estimation uncertainty. Poor channel state estimates are shown to degrade error rate performance significantly; however, if the channel estimation uncertainty is taken into account when selecting feedback parameters, it is shown that target performance can be maintained without wasting resources.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131906300","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
Systolic array processors for 2D IIR spatio-temporal beamforming wave-digital filters (WDFs) 用于二维IIR时空波束形成波-数字滤波器(WDFs)的收缩阵列处理器
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291398
H. Madanayake, L. Bruton
{"title":"Systolic array processors for 2D IIR spatio-temporal beamforming wave-digital filters (WDFs)","authors":"H. Madanayake, L. Bruton","doi":"10.1109/PACRIM.2009.5291398","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291398","url":null,"abstract":"A systolic-array FPGA processor is proposed for implementing 2D IIR frequency-planar-beam wave digital filters (WDFs) to achieve directional enhancement of propagating broadband plane-waves based on their directions of arrival. The architecture is based on a passive LC ladder prototype network and has a high-throughput of one-frameper-clock-cycle. The structural similarity between the 2D WDF, the 2D analog prototype and the proposed implementation leads to a massively-parallel realization. An example is provided of an implementation on a Xilinx Virtex-4 Sx35-10ff668 FPGA.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130857487","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
The Noiseless code-length concept in subspace estimation for low SNR hyperspectral signals 低信噪比高光谱信号子空间估计中的无噪声码长概念
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291332
M. Farzam, S. Beheshti
{"title":"The Noiseless code-length concept in subspace estimation for low SNR hyperspectral signals","authors":"M. Farzam, S. Beheshti","doi":"10.1109/PACRIM.2009.5291332","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291332","url":null,"abstract":"In hyperspectral applications, signal vectors belong to a much lower dimensional subspace than the observed data. The true dimensionality of hyperspectral data is difficult to determine in practice. In the presence of powerful noise, estimation of the number of spectrally distinct signal sources that characterize the hyperspectral data is a challenge. In practice, there is no a priori knowledge of the noise statistics. In this paper, we propose the hyperspectral Noiseless Code-length (HYNCO) method that exploits the high correlation property of hyperspectral data in adjacent bands. HYNCO uses a multiple regression based method to estimate the second order statistics of the noise signal. Further, a combination of the Noiseless code-length concept and the Multiple Regression method is introduced to estimate the rank of the hyperspectral data. Rank conjecture is obtained by locating the subset that minimizes the reconstruction error defined by the method. The algorithm was applied to both synthetically simulated data and to a real hyperspectral image.Comparing the results with existing methods indicates that this method would strongly improve the accuracy of subspace estimation in extremely noisy applications.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126840675","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
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