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Image coding using Variable-Size Transforms and a full binary tree recursive optimization 图像编码使用可变大小变换和一个完整的二叉树递归优化
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948006
Anderson V. C. de Oliveira, Nuno M. M. Rodrigues, S. D. de Faria, Eduardo A. B. da Silva, C. Pagliari
{"title":"Image coding using Variable-Size Transforms and a full binary tree recursive optimization","authors":"Anderson V. C. de Oliveira, Nuno M. M. Rodrigues, S. D. de Faria, Eduardo A. B. da Silva, C. Pagliari","doi":"10.1109/ITS.2014.6948006","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948006","url":null,"abstract":"In this work, we present the first results of a new algorithm for image compression, called Variable Size Transform Coder (VSTC). This algorithm uses spatial transforms and recursive optimization functions combined with a highly adaptive segmentation scheme, similar to the one proposed by the MMP algorithm (Multi-dimensional Multiscale Parser), that uses pattern matching. We replaced the pattern matching by spatial multiscale transforms, which include symmetric and asymmetric blocks, and we investigated and implemented some of the required tools for encoding these new blocks. The proposed method uses a much more dynamic adaptive-size transforms than the H.264/AVC standard and compares favorably with this encoder. It also consistently outperforms the pattern matching scheme of the MMP algorithm. Moreover, we have considerably reduced the computational complexity when compared to the MMP algorithm.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122164602","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
Life cycle cost analysis of substation automation implementation 变电站自动化实施的全生命周期成本分析
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948013
V. Farias, N. C. Fernandes
{"title":"Life cycle cost analysis of substation automation implementation","authors":"V. Farias, N. C. Fernandes","doi":"10.1109/ITS.2014.6948013","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948013","url":null,"abstract":"This paper proposes a quantitative evaluation of the classic discussion on cost-benefit and risk management involved in the implementation of telecommunications networks for Substation Automation Systems (SAS). The goal is to find the optimal point for investing in quality and reliability in order to maximize the profitability of the project. Various IEC 61850 substation automation system (SAS) architectures are compared in terms of price, reliability, and their impacts in the power grid quality and cost of ownership of the project. The method used in this paper is the life cycle cost analysis (LCCA). It enables an objective decision of the topology options considering the high reliability requirements of SAS networks. This paper discusses how to make the best out of this new approach in protection and supervision of power systems.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123664371","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
Objective quality assessment of echo-impaired full-band speech signals 回声受损全频带语音信号的客观质量评价
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948022
F. Avila, Leonardo O. Nunes, L. Biscainho, A. F. Tygel, Bowon Lee
{"title":"Objective quality assessment of echo-impaired full-band speech signals","authors":"F. Avila, Leonardo O. Nunes, L. Biscainho, A. F. Tygel, Bowon Lee","doi":"10.1109/ITS.2014.6948022","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948022","url":null,"abstract":"This paper describes a double-ended objective quality assessment method for evaluating full-band (sampled at 48 kHz) speech signals impaired by acoustic echo and background noise. The proposed method is based on a single metric of the ITU-T standard PEAQ (originally developed for audio signals) that, along with an appropriate mapping function, is shown to be able to reliably predict the overall quality of speech signals concurrently degraded by acoustic echo and background noise. In order to train and validate the proposed method, three speech signal databases were developed and subjectively assessed. One database is used only for training and testing purposes whereas the other two are employed in validation. Using the validation databases, it has been shown that the proposed method can predict the quality of signals degraded with a wider scope of acoustic echo and noise characteristics than those considered in its development.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126894677","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
Performance analysis of MC-CDMA systems employing maximal ratio combining and uniform linear antenna array 采用最大比组合和均匀线性天线阵列的MC-CDMA系统性能分析
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948034
H. Carvajal, N. Orozco, C. de Almeida
{"title":"Performance analysis of MC-CDMA systems employing maximal ratio combining and uniform linear antenna array","authors":"H. Carvajal, N. Orozco, C. de Almeida","doi":"10.1109/ITS.2014.6948034","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948034","url":null,"abstract":"This paper presents exact analytical expressions to evaluate the mean symbol error rate (SER) and the mean bit error rate (BER) of Multicarrier Code Division Multiple Access (MC-CDMA) systems using a correlation receiver with maximal ratio combining (MRC) and uniform linear antenna array at the base station. The performance is evaluated considering additive white gaussian noise (AWGN), Rayleigh fading, multiple access interference (own cell interference) and co-cell interference. Simulations using the Monte Carlo method are carried out, which are compared with the analytical expressions. An asynchronous uplink case with independent fading at different subcarriers is considered and BPSK and M-QAM modulations are used.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128284566","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
Successive interference cancellation algorithm in m-QAM nonorthogonal multicarrier systems m-QAM非正交多载波系统的逐次干扰抵消算法
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948049
Daniel Costa Araújo, A. M. P. Lucena, J. C. Moura Mota
{"title":"Successive interference cancellation algorithm in m-QAM nonorthogonal multicarrier systems","authors":"Daniel Costa Araújo, A. M. P. Lucena, J. C. Moura Mota","doi":"10.1109/ITS.2014.6948049","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948049","url":null,"abstract":"This article investigates non-linear and linear receivers to detect N non-orthogonal m-QAM signals through AWGN channel: maximum likelihood receiver (ML), minimum mean square error (MMSE), successive interference cancellation (SIC) and a completely new architecture called modified SIC. An analytical development of the project from each one of the proposed architecture is performed. As contribution we present the performance of the modified SIC in terms of bit error rate (BER) which is close to the performance of the ML receiver with less computational complexity. Another contribution is the determination of the minimum distance among non-orthogonal signals according to spectral overlapping considering N = 5. Finally, the results are discussed as well as our future prospects of research.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129735629","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
Enhancement of chromatic dispersion and post-filtering effects tolerances on spectrum-sliced WDM-PONs using self-seeded reflective-SOAs 利用自种子反射soa增强波分波束的色散和后滤波效应容忍度
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947993
U. R. Duarte, M. Romero, J. Rosolem, R. S. Penze, A. A. Leonardi
{"title":"Enhancement of chromatic dispersion and post-filtering effects tolerances on spectrum-sliced WDM-PONs using self-seeded reflective-SOAs","authors":"U. R. Duarte, M. Romero, J. Rosolem, R. S. Penze, A. A. Leonardi","doi":"10.1109/ITS.2014.6947993","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947993","url":null,"abstract":"A wavelength-reuse topology with downstream carriers based on 1.25 Gb/s directly modulated self-seeded reflective semiconductor optical amplifier (RSOA) is investigated in regard to post-filtering effects (PFE) and chromatic dispersion (CD) tolerances. Downstream and bidirectional reaches up to 80 and 60 km, respectively, with maximum 2 dB power penalty (for a BER of 10-12) on 1.25 Gb/s are achieved for our combined scheme. The proposed topology enables the enhancement of CD and PFE tolerances as well as the best cost-effective configuration for intensity-remodulation topologies while surpassing the conventional scheme pre-spectrum slicing light (PSSL) injection topology in 40 km.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126119455","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 annotated video database for abandoned-object detection in a cluttered environment 一种用于杂乱环境中废弃物体检测的带注释的视频数据库
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947966
Allan F. da Silva, Lucas A. Thomaz, G. Carvalho, Mateus T. Nakahata, E. Jardim, J.F.L. de Oliveira, Eduardo A. B. da Silva, S. L. Netto, Gustavo Freitas, Ramon R. Costa
{"title":"An annotated video database for abandoned-object detection in a cluttered environment","authors":"Allan F. da Silva, Lucas A. Thomaz, G. Carvalho, Mateus T. Nakahata, E. Jardim, J.F.L. de Oliveira, Eduardo A. B. da Silva, S. L. Netto, Gustavo Freitas, Ramon R. Costa","doi":"10.1109/ITS.2014.6947966","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947966","url":null,"abstract":"A video database is described for testing video surveillance systems for the automatic detection of abandoned objects in a cluttered environment. The database requirements and development are included along with a full description of its contents. The complete database comprises a total 6 multi-object, 56 single-object and 4 no-object (for reference purposes) footages, acquired with two different cameras and two different light conditions, yielding an approximate total of 8.2 hours of video. Database annotation was performed with a specialized tool, developed in the context of this particular work, that provides a bounding box for each object (or its several parts in case of partial occlusion) in every video frame. The complete dataset constitutes a valuable tool for designing and testing automatic video-based systems for abandoned-object detection.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115885384","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: 20
Interference analysis involving HEO satellites and fixed service receivers: probabilistic modeling of the fixed service receiving antenna elevation angle 高轨道卫星与固定业务接收机的干扰分析:固定业务接收天线仰角的概率建模
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948011
Ana Gabriela Zacarias Correa, Jose Mauro Fortes
{"title":"Interference analysis involving HEO satellites and fixed service receivers: probabilistic modeling of the fixed service receiving antenna elevation angle","authors":"Ana Gabriela Zacarias Correa, Jose Mauro Fortes","doi":"10.1109/ITS.2014.6948011","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948011","url":null,"abstract":"This paper focuses on the protection of terrestrial fixed service (FS) receivers from the aggregate interference produced by multiple highly elliptical orbit (HEO) systems operating in the 18 GHz band. Studies involving this type of interference usually consider the assumption that the victim FS receivers have their receiving antennas with zero degree elevation angle. In this work a probabilistic analysis, in which the elevation angle of the FS receiving antenna is modeled as a random variable, evaluates the aggregate interference produced by the satellites of multiple HEO systems into FS receivers. The proposed mathematical model is applied to two scenarios involving multiple interfering HEO systems and the obtained results are compared to those resulting from analyses that assume a zero degree elevation angle for the FS receiving antenna.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125871026","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
Blind source separation for overdetermined linear quadratic mixtures of bandlimited signals 带限信号过定线性二次混合的盲源分离
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947974
Rafael Assato Ando, Leonardo Tomazeli Duarte, R. Attux
{"title":"Blind source separation for overdetermined linear quadratic mixtures of bandlimited signals","authors":"Rafael Assato Ando, Leonardo Tomazeli Duarte, R. Attux","doi":"10.1109/ITS.2014.6947974","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947974","url":null,"abstract":"In this paper, we address the problem of blind source separation for linear quadratic mixtures. The proposed approach relies on the assumption that the input signals are band-limited. As the nonlinearity of the mixing process tends to widen the spectra of the mixture signals, and taking into account the fact that there are more mixtures than sources in the overdetermined version of the problem, we propose a method that uses the additional mixtures to eliminate the nonlinearities of the observed signals. This gives rise to a linear problem that can be solved with standard methods previously analyzed in the literature. Numerical experiments show that the proposed algorithm successfully separates the sources under the proposed conditions.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128359307","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
Bayesian distributed blind equalization based on density-sum filters 基于密度和滤波器的贝叶斯分布盲均衡
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947973
C. Bordin, Marcelo G. S. Bruno
{"title":"Bayesian distributed blind equalization based on density-sum filters","authors":"C. Bordin, Marcelo G. S. Bruno","doi":"10.1109/ITS.2014.6947973","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947973","url":null,"abstract":"This paper introduces a new Bayesian algorithm for blind equalization of frequency-selective channels in a setup where a single transmitter broadcasts to multiple remote receivers. The algorithm approximates some posterior probability functions, which are density mixtures with an exponentially growing number of terms, by mixtures with constant term count via a moment-matching technique. We verify via numerical simulations that the proposed algorithms exhibit bit error rate (BER) performances similar to that of particle-filtering-based algorithms while incurring in reduced internode communication cost.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"448 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132788556","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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