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2011 IEEE Workshop on Signal Processing Systems (SiPS)最新文献

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Low energy process variation tolerant digital image processing system design based on accuracy-energy tradeoffs 基于精度-能量权衡的低能量过程容差数字图像处理系统设计
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088958
Se Hun Kim, S. Mukhopadhyay, Honggab Kim, M. Wolf
{"title":"Low energy process variation tolerant digital image processing system design based on accuracy-energy tradeoffs","authors":"Se Hun Kim, S. Mukhopadhyay, Honggab Kim, M. Wolf","doi":"10.1109/SiPS.2011.6088958","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088958","url":null,"abstract":"In this paper, we present a low energy image processing system design based on efficient accuracy-energy tradeoffs. The proposed design allows aggressive voltage scaling in the presence of process variation by employing an error concealing method based on the inherent error tolerance of digital signal processing applications. Based on a system-level analysis, we demonstrate that significant energy savings can be achieved from voltage scaling and switching activity reduction for computational components. Using the proposed method, we can also achieve energy savings for other subsystems such as memory by increasing compression ratio. The experimental results show that average overall energy savings of up to ∼50% are possible over a conventional design in a 45nm technology.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127643562","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
An efficient Gaussian random number architecture for MIMO channel emulators MIMO信道仿真器的高效高斯随机数结构
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088996
J. V. Castillo, A. Atoche, O. Longoria-Gandara, R. Parra-Michel
{"title":"An efficient Gaussian random number architecture for MIMO channel emulators","authors":"J. V. Castillo, A. Atoche, O. Longoria-Gandara, R. Parra-Michel","doi":"10.1109/SiPS.2011.6088996","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088996","url":null,"abstract":"Gaussian random numbers (GRN) generators are indispensable components in channel emulators for producing multiplicative and additive noises. Efficient designs of these GRN generators are required for testing the newest communications standards, which consider multiple channels working at higher data rates. In this paper, a new reconfigurable architecture for the generation of GRN at each clock cycle is proposed. The design consists in the polynomial approximation of the inverse method, implemented through parallel computing techniques using processor arrays. Time and area analysis carried out show a performance improvement when compared with previous works. Finally, the architecture's statistical performance was corroborated in QAM-VBLAST transmission scheme.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115905661","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: 8
Determining the minimum energy operating point for embedded SRAM memory 确定嵌入式SRAM存储器的最小能量工作点
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088959
Farah B. Yahya, Mohammad M. Mansour
{"title":"Determining the minimum energy operating point for embedded SRAM memory","authors":"Farah B. Yahya, Mohammad M. Mansour","doi":"10.1109/SiPS.2011.6088959","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088959","url":null,"abstract":"Reducing power consumption is a major concern in mobile applications, since they are battery operated and require high performance. In this paper, a novel technique to reduce the power consumed by embedded SRAM memory is introduced. The proposed method is an on-chip circuit to measure the optimal data retention voltage (DRV) of the SRAM array. The implemented DRV computing circuit consists of a built-in-self-test (BIST) unit, a DC-DC converter and some control logic. The proposed technique can be used to accurately measure the DRV to ensure the SRAM operates at its minimum energy point. The circuit was developed in 90nm technology and simulated using HSPICE. Monte-Carlo simulation of 100k samples determined the DRV as 150mV whereas the proposed technique showed that the DRV of the SRAM under test could be lowered to 80mV which would result in significant power savings.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131930773","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
Disparity map estimation under convex constraints using proximal algorithms 基于近端算法的凸约束下视差图估计
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088992
Mireille El Gheche, J. Pesquet, J. Farah, C. Chaux, B. Pesquet-Popescu
{"title":"Disparity map estimation under convex constraints using proximal algorithms","authors":"Mireille El Gheche, J. Pesquet, J. Farah, C. Chaux, B. Pesquet-Popescu","doi":"10.1109/SiPS.2011.6088992","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088992","url":null,"abstract":"In this paper, we propose a new approach for estimating depth maps of stereo images which are prone to various types of noise. This method, based on a parallel proximal algorithm, gives a great flexibility in the choice of the constrained criterion to be minimized, thus allowing us to take into account different types of noise distributions. Our main objective is to present an iterative estimation method based on recent convex optimization algorithms and proximal tools. Results for several error measures demonstrate the effectiveness and robustness of the proposed method for disparity map estimation even in the presence of perturbations.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133395652","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
An encoding scheme and encoder architecture for rate-compatible QC-LDPC codes 一种兼容码率的QC-LDPC码的编码方案和编码器结构
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088997
A. Mahdi, N. Kanistras, Vassilis Paliouras
{"title":"An encoding scheme and encoder architecture for rate-compatible QC-LDPC codes","authors":"A. Mahdi, N. Kanistras, Vassilis Paliouras","doi":"10.1109/SiPS.2011.6088997","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088997","url":null,"abstract":"We consider the problem of rate-compatible (RC)-encoder and RC-puncturing of LDPC codes. The proposed encoder is based on a modification of MacKay encoding scheme. The introduced modification enables the application of MacKay scheme for quasi-cyclic (QC) LDPC codes combined with a proposed matrix puncturing scheme based on an also proposed parity-check matrix construction to achieve code-rate compatibility. The proposed encoding scheme and VLSI encoder architecture address the problem of encoding complexity, since about 80% of MacKay encoding algorithm complexity is linearly depended on LDPC check node degree. The proposed matrix puncturing scheme can produce good BER performance especially for high puncturing rates, where only a few parity check symbols are transmitted. A comparison with prior art in puncturing is offered, which shows superior performance of the proposed scheme, in terms of coding gain without any hardware cost.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117177377","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: 9
A hybrid codebook background model for background subtraction 一种用于背景减法的混合码本背景模型
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088956
I-Ting Sun, Shih-Chung Hsu, Chung-Lin Huang
{"title":"A hybrid codebook background model for background subtraction","authors":"I-Ting Sun, Shih-Chung Hsu, Chung-Lin Huang","doi":"10.1109/SiPS.2011.6088956","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088956","url":null,"abstract":"Real-time segmentation of scene into foreground and background is an important issue for many applications. Different from previous codebook (CB) methods, this paper introduces a hybrid CB model by combining the mixture of Gaussian (MOG) method and the CB method. It can be used to solve the problems of moving background and shadow/highlight on the background and background. Our method avoids extracting false foreground pixels or missing real foreground pixels. The experimental results illustrate the advantages of our method over the other methods.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122300590","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
Remote diagnostics and performance analysis for a wireless sensor network 无线传感器网络的远程诊断和性能分析
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088951
J. Suhonen, M. Hänninen, T. Hämäläinen, Marko Hännikäinen
{"title":"Remote diagnostics and performance analysis for a wireless sensor network","authors":"J. Suhonen, M. Hänninen, T. Hämäläinen, Marko Hännikäinen","doi":"10.1109/SiPS.2011.6088951","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088951","url":null,"abstract":"Wireless Sensor Networks (WSNs) comprise embedded sensor nodes that operate autonomously in a multi-hop topology. The challenges are unreliable wireless communications, harsh environment, and limited energy and computation resources. To ensure the desired level of service, it is essential to diagnose performance issues e.g. due to low quality links or energy depletion. This paper presents remote diagnostics and performance analysis that comprise self-diagnostics on embedded sensor nodes, the remote collection of diagnostics, and the design of a diagnostics analysis tool. Unlike the related proposals, our approach allows correcting detected problems by identifying the reasons for misbehavior. The diagnostics is verified with a practical WSN implementation. It has only a small overhead, less than 18 B/min per node in the implementation, allowing the use in bandwidth and energy constrained WSNs.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131812833","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
Enabling efficient system configurations for dynamic wireless baseband engines using system scenarios 使用系统场景为动态无线基带引擎启用有效的系统配置
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088994
N. Zompakis, A. Papanikolaou, P. Raghavan, D. Soudris, F. Catthoor
{"title":"Enabling efficient system configurations for dynamic wireless baseband engines using system scenarios","authors":"N. Zompakis, A. Papanikolaou, P. Raghavan, D. Soudris, F. Catthoor","doi":"10.1109/SiPS.2011.6088994","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088994","url":null,"abstract":"Next generation mobile wireless systems (4G) support a wide range of communication protocols and services opening new design challenges. The desired flexibility requires an effective utilization of system resources. In this paper, we introduce the concept of system scenarios in wireless communication baseband engines. The scenario methodology classifies the system behavior from a cost perspective and provides the necessary information for an effective system tuning. Apart from the case study, we propose improvements at the detection of the scenarios at run time achieving a better tradeoff between cost estimation accuracy and detection overhead. From our case study, a representative example the WLAN communication protocol, we can demonstrate the accurate prediction of the execution time of each packet, which on average is 90% shorter than the worst case, allowing us to use the remaining time for the optimization of specifications like power consumption.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127704869","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
Coding method for embedding audio in video stream 在视频流中嵌入音频的编码方法
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088986
H. Sorokin, Jari Koivusaari, M. Gabbouj, J. Takala
{"title":"Coding method for embedding audio in video stream","authors":"H. Sorokin, Jari Koivusaari, M. Gabbouj, J. Takala","doi":"10.1109/SiPS.2011.6088986","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088986","url":null,"abstract":"In this paper, a new method for synchronous coding of digital audio and video signals is proposed. The audio signal is embedded within video signal to produce synchronous hybrid signal that is further encoded. The receiver is able to extract the audio signal from the hybrid signal, and thus, is able to reconstruct two separate signals, the audio and the video. The proposed method enables synchronous coding, transmission, storage, and playback of a video signal and the associated audio signal. The scheme can be used with the current and the developing coding standards to enable the accurate synchronization for the audio and the video data.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126715947","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
High speed intra mode and direction prediction for MPEG-2 to H.264/AVC realtime transcoder MPEG-2转H.264/AVC实时转码器的高速模式和方向预测
2011 IEEE Workshop on Signal Processing Systems (SiPS) Pub Date : 2011-12-01 DOI: 10.1109/SiPS.2011.6088953
Tarek A. Elarabi, A. Ragab, H. Mahmoud, M. Bayoumi
{"title":"High speed intra mode and direction prediction for MPEG-2 to H.264/AVC realtime transcoder","authors":"Tarek A. Elarabi, A. Ragab, H. Mahmoud, M. Bayoumi","doi":"10.1109/SiPS.2011.6088953","DOIUrl":"https://doi.org/10.1109/SiPS.2011.6088953","url":null,"abstract":"The paper presents a significantly fast INTRA mode and direction prediction algorithm for MPEG-2 to H.264/AVC time sensitive transcoders for mobile applications. The mode and direction prediction in H.264/AVC encoder is responsible for a huge portion of the delay in the transcoder. An efficient transcoder would take advantage of the information stored in MPEG-2 bitstream (i.e. DCT coefficients) to simplify the IN-TRA prediction in H.264/AVC. Based on the spatial activity analysis using a smoothness determining factor and an edge orientation detector, an early mode decision technique and an INTRA direction prediction for each mode are proposed. The proposed algorithm utilizes the DCT coefficients of the MPEG-2 to eliminate redundant operations in the H.264/AVC encoder part of the transcoder. The Experimental results; using frames with different resolution; show 92% transcoding time elimination at slight PSNR degradation (less than 3.5%) compared with the conventional transcoder.","PeriodicalId":368538,"journal":{"name":"2011 IEEE Workshop on Signal Processing Systems (SiPS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126876458","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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