首页 > 最新文献

2013 9th International Conference on Information, Communications & Signal Processing最新文献

英文 中文
Neurofuzzy inference systems based on tribal particle swarm optimization for forecasting sunspot numbers 基于部落粒子群优化的神经模糊推理系统预测太阳黑子数
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782878
Cheng-Hung Chen, Yen-Yun Liao, Shu-Wei Liu
This study presents tribal particle swarm optimization (TPSO) to optimize the parameters of the specific neurofuzzy inference system (NIS) for forecasting sunspot numbers. The proposed TPSO uses particle swarm optimization (PSO) as evolution strategies of the tribes optimization algorithm (TOA) to balance local and global exploration of the search space. Experimental results demonstrated that the proposed TPSO method converges quickly and yields a lower RMS error than other current methods.
采用部落粒子群算法(TPSO)对特定神经模糊推理系统(NIS)的参数进行优化,以预测太阳黑子数。该算法采用粒子群优化(PSO)作为部落优化算法(TOA)的进化策略来平衡局部和全局搜索空间。实验结果表明,该方法收敛速度快,均方根误差小。
{"title":"Neurofuzzy inference systems based on tribal particle swarm optimization for forecasting sunspot numbers","authors":"Cheng-Hung Chen, Yen-Yun Liao, Shu-Wei Liu","doi":"10.1109/ICICS.2013.6782878","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782878","url":null,"abstract":"This study presents tribal particle swarm optimization (TPSO) to optimize the parameters of the specific neurofuzzy inference system (NIS) for forecasting sunspot numbers. The proposed TPSO uses particle swarm optimization (PSO) as evolution strategies of the tribes optimization algorithm (TOA) to balance local and global exploration of the search space. Experimental results demonstrated that the proposed TPSO method converges quickly and yields a lower RMS error than other current methods.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134027497","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
Optimum power allocation for OFDM in physical-layer network coding over a flat frequency-selective fading channel 平坦选频衰落信道中OFDM物理层网络编码的最佳功率分配
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782897
Desi Luo, Qiyue Yu, W. Meng
The physical layer network coding (PNC) takes advantages of signal interference at relay node and improves the channel capacity, therefore, PNC becomes an important research topic. However, the frequency-selective fading channel would destroy the performances of PNC. This paper considers orthogonal frequency division multiplex (OFDM) in PNC, when signals transmitted over a frequency-selective fading channel, and an optimum power allocation scheme is proposed. Simulation results show that the presented system not only eliminates the multi-path interference, but also maximizes the channel capacity by the optimum power allocation.
物理层网络编码(PNC)利用了中继节点的信号干扰,提高了信道容量,成为一个重要的研究课题。然而,频率选择性衰落信道会破坏PNC的性能。本文考虑了正交频分复用(OFDM)在PNC中信号在频率选择衰落信道上传输的情况,提出了一种最优的功率分配方案。仿真结果表明,该系统不仅消除了多径干扰,而且通过最优功率分配实现了信道容量的最大化。
{"title":"Optimum power allocation for OFDM in physical-layer network coding over a flat frequency-selective fading channel","authors":"Desi Luo, Qiyue Yu, W. Meng","doi":"10.1109/ICICS.2013.6782897","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782897","url":null,"abstract":"The physical layer network coding (PNC) takes advantages of signal interference at relay node and improves the channel capacity, therefore, PNC becomes an important research topic. However, the frequency-selective fading channel would destroy the performances of PNC. This paper considers orthogonal frequency division multiplex (OFDM) in PNC, when signals transmitted over a frequency-selective fading channel, and an optimum power allocation scheme is proposed. Simulation results show that the presented system not only eliminates the multi-path interference, but also maximizes the channel capacity by the optimum power allocation.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125057939","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
Adaptive Weighted Multi-Element Collaborative Representation for Visual Classification 视觉分类的自适应加权多元素协同表示
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782782
Ganglong Duan, Long Wei, Jianren Wang, Hongqi Wang
Adaptive Weighted Multi-Element Collaborative Representation for Visual Classification is proposed in this paper. To address the weak discriminative power of SRC (sparse representation classifier) method, we propose using multiple elements to represent each element and construct multiple collaborative representation for classification. To reflect the different element with different importance and discriminative power, we present an adaptive weighted residuals method to linearly combine different element representations for classification. Experimental results demonstrate the effectiveness and better classification accuracy of our proposed method.
提出了一种用于视觉分类的自适应加权多元素协同表示方法。针对SRC(稀疏表示分类器)方法识别能力弱的问题,提出用多个元素表示每个元素,构建多个协同表示进行分类。为了反映具有不同重要性和判别能力的不同元素,提出了一种自适应加权残差法,将不同元素表示线性组合进行分类。实验结果证明了该方法的有效性和较好的分类精度。
{"title":"Adaptive Weighted Multi-Element Collaborative Representation for Visual Classification","authors":"Ganglong Duan, Long Wei, Jianren Wang, Hongqi Wang","doi":"10.1109/ICICS.2013.6782782","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782782","url":null,"abstract":"Adaptive Weighted Multi-Element Collaborative Representation for Visual Classification is proposed in this paper. To address the weak discriminative power of SRC (sparse representation classifier) method, we propose using multiple elements to represent each element and construct multiple collaborative representation for classification. To reflect the different element with different importance and discriminative power, we present an adaptive weighted residuals method to linearly combine different element representations for classification. Experimental results demonstrate the effectiveness and better classification accuracy of our proposed method.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134268419","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
Subspace-based blind channel estimation for cyclic prefixed MIMO-OFDM systems using few received blocks 基于子空间的循环前缀MIMO-OFDM系统盲信道估计
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782887
Feng-Jie Yeh, B. Su
In this paper, two subspace (SS) based blind channel estimation methods for cyclic prefixing (CP) based multi-input and multi-output (MIMO) OFDM systems are proposed. The first one generalized a previously reported single-input and single-output (SISO) based method into the MIMO case. The second one is an extension to the first one by smartly introducing additional columns per received block in the channel matrix equation. These two SS methods require few received blocks to satisfy the persistency of excitation (POE) criterion and do not require the number of receive antennas to be greater than that of transmit antennas. Simulation results demonstrate the capability of the proposed methods to perform blind channel estimation using few received blocks. Compared to multiple existing SS methods, significant performance improvements of the proposed methods are observed given the same amount of available received data.
针对基于循环前缀(CP)的多输入多输出OFDM系统,提出了两种基于子空间(SS)的盲信道估计方法。第一个将先前报道的基于单输入单输出(SISO)的方法推广到MIMO案例中。第二个是对第一个的扩展,它巧妙地在通道矩阵方程中为每个接收块引入了额外的列。这两种SS方法只需较少的接收块即可满足POE (persistence of excitation)标准,并且不要求接收天线的数量大于发射天线的数量。仿真结果表明,该方法能够利用较少的接收块进行盲信道估计。与现有的多种SS方法相比,在接收到的可用数据量相同的情况下,所提出的方法的性能得到了显著提高。
{"title":"Subspace-based blind channel estimation for cyclic prefixed MIMO-OFDM systems using few received blocks","authors":"Feng-Jie Yeh, B. Su","doi":"10.1109/ICICS.2013.6782887","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782887","url":null,"abstract":"In this paper, two subspace (SS) based blind channel estimation methods for cyclic prefixing (CP) based multi-input and multi-output (MIMO) OFDM systems are proposed. The first one generalized a previously reported single-input and single-output (SISO) based method into the MIMO case. The second one is an extension to the first one by smartly introducing additional columns per received block in the channel matrix equation. These two SS methods require few received blocks to satisfy the persistency of excitation (POE) criterion and do not require the number of receive antennas to be greater than that of transmit antennas. Simulation results demonstrate the capability of the proposed methods to perform blind channel estimation using few received blocks. Compared to multiple existing SS methods, significant performance improvements of the proposed methods are observed given the same amount of available received data.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133610377","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
Adaptive window selection in estimating dynamic functional connectivity of resting-state fMRI 静息状态fMRI动态功能连通性估计中的自适应窗口选择
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782935
Zhiguo Zhang, Z. Fu, S. Chan, Y. Hung, G. Motta, X. Di, B. Biswal
Investigation of the intrinsic brain networks using the resting-state functional magnetic resonance imaging (rs-fMRI) is generally based on the assumption that the functional organization is stationary across the duration of the scan. Hence, the presence and potential of temporal and spatial dynamics of the functional connectivity (FC), which is usually measured by the correlation coefficients between rs-fMRI signals of two regions, are not taken into account in most of the research. Recent studies have shown that the resting-state brain activities are time-varying in nature with substantial dynamic characteristics. However, an effective method for estimating the time-varying FC is lacking, which is mainly due to the difficulty in choosing an appropriate window to localize the time-varying correlation coefficients (TVCC). In this paper, we introduce a novel method for adaptively estimating the TVCC of non-stationary signals and study its application to infer dynamic FC of rs-fMRI data. The proposed method employs a sliding window with adaptive size, which is selected by a local plug-in rule to minimize the mean square error, to estimate the TVCC locally. Simulation results on synthetic data show that the proposed method outperforms the conventional TVCC estimators with a fixed window. Furthermore, the proposed method is used on real rs-fMRI signals, and the results demonstrate that the FC in the resting state are transient and the variability of FCs between different brain regions differs substantially.
静息状态功能磁共振成像(rs-fMRI)对固有脑网络的研究通常基于功能组织在扫描期间是静止的假设。因此,通常通过两个区域的rs-fMRI信号之间的相关系数来衡量的功能连通性(FC)的时空动态的存在和潜力,在大多数研究中没有考虑到。近年来的研究表明,静息状态下的大脑活动是时变的,具有明显的动态特征。然而,由于难以选择合适的窗口来定位时变相关系数(TVCC),缺乏一种有效的时变相关系数估计方法。本文介绍了一种自适应估计非平稳信号TVCC的新方法,并研究了其在rs-fMRI数据动态FC推断中的应用。该方法采用自适应大小的滑动窗口,并根据最小均方误差的局部插件规则选择滑动窗口,对TVCC进行局部估计。在综合数据上的仿真结果表明,该方法优于传统的固定窗口TVCC估计方法。此外,将该方法应用于真实的rs-fMRI信号,结果表明静息状态下的FC是短暂的,不同脑区之间的FC变异性有很大差异。
{"title":"Adaptive window selection in estimating dynamic functional connectivity of resting-state fMRI","authors":"Zhiguo Zhang, Z. Fu, S. Chan, Y. Hung, G. Motta, X. Di, B. Biswal","doi":"10.1109/ICICS.2013.6782935","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782935","url":null,"abstract":"Investigation of the intrinsic brain networks using the resting-state functional magnetic resonance imaging (rs-fMRI) is generally based on the assumption that the functional organization is stationary across the duration of the scan. Hence, the presence and potential of temporal and spatial dynamics of the functional connectivity (FC), which is usually measured by the correlation coefficients between rs-fMRI signals of two regions, are not taken into account in most of the research. Recent studies have shown that the resting-state brain activities are time-varying in nature with substantial dynamic characteristics. However, an effective method for estimating the time-varying FC is lacking, which is mainly due to the difficulty in choosing an appropriate window to localize the time-varying correlation coefficients (TVCC). In this paper, we introduce a novel method for adaptively estimating the TVCC of non-stationary signals and study its application to infer dynamic FC of rs-fMRI data. The proposed method employs a sliding window with adaptive size, which is selected by a local plug-in rule to minimize the mean square error, to estimate the TVCC locally. Simulation results on synthetic data show that the proposed method outperforms the conventional TVCC estimators with a fixed window. Furthermore, the proposed method is used on real rs-fMRI signals, and the results demonstrate that the FC in the resting state are transient and the variability of FCs between different brain regions differs substantially.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"317 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116364752","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
A user authentication scheme on multi-server environments for cloud computing 面向云计算的多服务器环境下的用户认证方案
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782791
Jen-Ho Yang, Ya-Fen Chang, Chih-Cheng Huang
In the cloud computing, user authentication is an important security mechanism because it provides the functions of authentication, authorization, and accounting for cloud servers. However, the previously proposed user authentication schemes have many security and efficiency problems. In addition, these schemes can only work on single server environments. To solve the above problems, we propose a new user authentication scheme on multi-server environments for cloud computing in this paper. Compared with the related works, the proposed scheme has less computation costs. In addition, the proposed scheme can be applied to multi-server environments because the ID-based concept is used. Therefore, the proposed user authentication scheme provides efficiency, security, and flexibility for the cloud computing applications.
在云计算中,用户认证为云服务器提供认证、授权和计费功能,是一种重要的安全机制。然而,以往提出的用户认证方案存在许多安全性和效率问题。此外,这些模式只能在单服务器环境中工作。为了解决上述问题,本文提出了一种新的云计算多服务器环境下的用户认证方案。与相关工作相比,该方案具有较低的计算成本。此外,由于采用了基于id的概念,该方案可以应用于多服务器环境。因此,本方案为云计算应用提供了高效、安全、灵活的用户认证方案。
{"title":"A user authentication scheme on multi-server environments for cloud computing","authors":"Jen-Ho Yang, Ya-Fen Chang, Chih-Cheng Huang","doi":"10.1109/ICICS.2013.6782791","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782791","url":null,"abstract":"In the cloud computing, user authentication is an important security mechanism because it provides the functions of authentication, authorization, and accounting for cloud servers. However, the previously proposed user authentication schemes have many security and efficiency problems. In addition, these schemes can only work on single server environments. To solve the above problems, we propose a new user authentication scheme on multi-server environments for cloud computing in this paper. Compared with the related works, the proposed scheme has less computation costs. In addition, the proposed scheme can be applied to multi-server environments because the ID-based concept is used. Therefore, the proposed user authentication scheme provides efficiency, security, and flexibility for the cloud computing applications.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115239484","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
Image segmentation approach for realizing zoomable streaming HEVC video 实现可缩放流式HEVC视频的图像分割方法
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782830
Yuri Umezaki, S. Goto
With the popularity of mobile devices such as mobile phones and cameras, zooming and displaying an arbitrary region of interest (ROI) from a high-resolution video has gained considerable importance. In this study, we implement two methods - partial decoding and tiled encoding - for ROI-based streaming in High Efficiency Video Coding (HEVC). In partial decoding, only the ROI and dependence area are decoded; this approach reduces the calculation cost. In tiled encoding, video frames are split into a grid of tiles, each of which is encoded independently; this approach requires a compatible decoder, and it reduces the streaming bitrate and decoding calculation cost. We evaluated these two methods in terms of the decoding calculation cost, bandwidth efficiency, and video quality. Experimental results show that partial decoding reduced the decoding calculation cost by 35-55%. Tiled encoding showed optimal decoding calculation cost and bandwidth efficiency for a tile size of 128 pixels.
随着移动设备(如移动电话和相机)的普及,从高分辨率视频中缩放和显示任意感兴趣区域(ROI)变得相当重要。在本研究中,我们针对高效率视讯编码(High Efficiency Video Coding, HEVC)中基于roi的串流,实现了部分解码和平铺编码两种方法。在部分解码中,只对感兴趣区域和相关区域进行解码;这种方法降低了计算成本。在平铺编码中,视频帧被分割成一个平铺网格,每个平铺网格独立编码;这种方法需要一个兼容的解码器,并且降低了流比特率和解码计算成本。我们从解码计算成本、带宽效率和视频质量三个方面对这两种方法进行了评价。实验结果表明,部分译码可使译码计算成本降低35 ~ 55%。对于128像素的平铺编码,显示出最佳的解码计算成本和带宽效率。
{"title":"Image segmentation approach for realizing zoomable streaming HEVC video","authors":"Yuri Umezaki, S. Goto","doi":"10.1109/ICICS.2013.6782830","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782830","url":null,"abstract":"With the popularity of mobile devices such as mobile phones and cameras, zooming and displaying an arbitrary region of interest (ROI) from a high-resolution video has gained considerable importance. In this study, we implement two methods - partial decoding and tiled encoding - for ROI-based streaming in High Efficiency Video Coding (HEVC). In partial decoding, only the ROI and dependence area are decoded; this approach reduces the calculation cost. In tiled encoding, video frames are split into a grid of tiles, each of which is encoded independently; this approach requires a compatible decoder, and it reduces the streaming bitrate and decoding calculation cost. We evaluated these two methods in terms of the decoding calculation cost, bandwidth efficiency, and video quality. Experimental results show that partial decoding reduced the decoding calculation cost by 35-55%. Tiled encoding showed optimal decoding calculation cost and bandwidth efficiency for a tile size of 128 pixels.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115475539","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
AVS encoding optimization with perceptual just noticeable distortion model 基于感知仅可察觉失真模型的AVS编码优化
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782937
Qi Cai, Li Song
Integrating efficient visual perceptual cues into standardized video coding framework can improve performance significantly. In this paper we propose to enhance AVS encoder by using the latest just noticeable distortion (JND) model to adjust DCT coefficients of prediction residues in a content adaptive way. To better modeling JND profile in AVS integer DCT domain, we further derive the JND mapping from the classical DCT domain to AVS Integer DCT domain. The experiment shows that the proposed algorithm can reduce the bitrate by about 13% on average, compared to the AVS standard encoder at similar visual quality.
将有效的视觉感知线索集成到标准化的视频编码框架中可以显著提高性能。本文提出利用最新的刚可注意失真(JND)模型以内容自适应的方式调整预测残差的DCT系数来增强AVS编码器。为了更好地在AVS整数DCT域中建模JND轮廓,我们进一步推导了从经典DCT域到AVS整数DCT域的JND映射。实验表明,在相同的视觉质量下,与AVS标准编码器相比,该算法可以将比特率平均降低约13%。
{"title":"AVS encoding optimization with perceptual just noticeable distortion model","authors":"Qi Cai, Li Song","doi":"10.1109/ICICS.2013.6782937","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782937","url":null,"abstract":"Integrating efficient visual perceptual cues into standardized video coding framework can improve performance significantly. In this paper we propose to enhance AVS encoder by using the latest just noticeable distortion (JND) model to adjust DCT coefficients of prediction residues in a content adaptive way. To better modeling JND profile in AVS integer DCT domain, we further derive the JND mapping from the classical DCT domain to AVS Integer DCT domain. The experiment shows that the proposed algorithm can reduce the bitrate by about 13% on average, compared to the AVS standard encoder at similar visual quality.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116944866","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 variable quantization technique for image compression using integer Tchebichef transform 基于整数切比切夫变换的图像压缩可变量化技术
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782815
Soni Prattipati, M. Swamy, P. Meher
In the field of image and data compression there is always a need for novel transform coding techniques promising improved reconstruction and reduced computational complexity. The usage of integer adaptation of the popular discrete cosine transform (DCT) with fixed quantization is prevalent in the field of video compression due to its ease of computation and acceptable performance. However, there exist other polynomial-based orthogonal transforms like discrete Tchebichef transform (DTT), which possess valuable properties like energy compaction, but are potentially unexploited in comparison. The influence of specific features, such as the structure and content, of the image on the quality of reconstructed image after decompression is undeniable. This paper aims to harness this aspect and introduces a technique to adapt the quantization performed during compression according to the characteristics of the image block without any additional computational or transmission overhead. The image compression performance of integer DTT and integer DCT, using both variable and fixed quantization, are evaluated and compared.
在图像和数据压缩领域,总是需要新颖的变换编码技术,以提高重建和降低计算复杂度。目前流行的离散余弦变换(DCT)采用固定量化的整数自适应,由于其易于计算和可接受的性能,在视频压缩领域得到了广泛的应用。然而,存在其他基于多项式的正交变换,如离散切切夫变换(DTT),它具有能量压缩等有价值的特性,但在比较中可能未被利用。图像的结构、内容等特定特征对解压后重建图像质量的影响是不可否认的。本文旨在利用这方面,并介绍了一种技术,以适应在压缩过程中执行的量化根据图像块的特点,没有任何额外的计算或传输开销。对采用可变量化和固定量化的整数DTT和整数DCT的图像压缩性能进行了评价和比较。
{"title":"A variable quantization technique for image compression using integer Tchebichef transform","authors":"Soni Prattipati, M. Swamy, P. Meher","doi":"10.1109/ICICS.2013.6782815","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782815","url":null,"abstract":"In the field of image and data compression there is always a need for novel transform coding techniques promising improved reconstruction and reduced computational complexity. The usage of integer adaptation of the popular discrete cosine transform (DCT) with fixed quantization is prevalent in the field of video compression due to its ease of computation and acceptable performance. However, there exist other polynomial-based orthogonal transforms like discrete Tchebichef transform (DTT), which possess valuable properties like energy compaction, but are potentially unexploited in comparison. The influence of specific features, such as the structure and content, of the image on the quality of reconstructed image after decompression is undeniable. This paper aims to harness this aspect and introduces a technique to adapt the quantization performed during compression according to the characteristics of the image block without any additional computational or transmission overhead. The image compression performance of integer DTT and integer DCT, using both variable and fixed quantization, are evaluated and compared.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121148847","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: 13
Dual-decoder-model scheduling for H.264 video transmission over wireless networks 无线网络上H.264视频传输的双解码器模式调度
Pub Date : 2013-12-01 DOI: 10.1109/ICICS.2013.6782913
Danyang Zhang, Fan Li, Chao Zhang
In this paper, a dual-decoder-based scheduling algorithm is proposed for H.264 video transmission over wireless networks. In the algorithm, the packet is scheduled by the packet quality contribution index (PQCI). The PQCI is defined and estimated not only by the quality distortion made for the current frame, but also by that made for the frames which directly or indirectly related with the current frame. A dual-decoder-model algorithm is proposed for the PQCI estimation. A novel architecture with two simulated decoders in the sender is developed. The simulations show that the proposed algorithm significantly outperforms the conventional methods in terms of received video qualities.
本文提出了一种基于双解码器的无线H.264视频传输调度算法。该算法采用包质量贡献指数(packet quality contribution index, PQCI)来调度数据包。PQCI不仅通过当前帧的质量失真来定义和估计,而且还通过与当前帧直接或间接相关的帧的质量失真来定义和估计。提出了一种用于PQCI估计的双解码器模型算法。提出了一种新颖的发送端具有两个模拟解码器的结构。仿真结果表明,该算法在接收视频质量方面明显优于传统方法。
{"title":"Dual-decoder-model scheduling for H.264 video transmission over wireless networks","authors":"Danyang Zhang, Fan Li, Chao Zhang","doi":"10.1109/ICICS.2013.6782913","DOIUrl":"https://doi.org/10.1109/ICICS.2013.6782913","url":null,"abstract":"In this paper, a dual-decoder-based scheduling algorithm is proposed for H.264 video transmission over wireless networks. In the algorithm, the packet is scheduled by the packet quality contribution index (PQCI). The PQCI is defined and estimated not only by the quality distortion made for the current frame, but also by that made for the frames which directly or indirectly related with the current frame. A dual-decoder-model algorithm is proposed for the PQCI estimation. A novel architecture with two simulated decoders in the sender is developed. The simulations show that the proposed algorithm significantly outperforms the conventional methods in terms of received video qualities.","PeriodicalId":184544,"journal":{"name":"2013 9th International Conference on Information, Communications & Signal Processing","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123483357","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
期刊
2013 9th International Conference on Information, Communications & Signal Processing
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1