2014 19th International Conference on Digital Signal Processing最新文献_第3页

Multi-polarization through-the-wall radar imaging using joint Bayesian compressed sensing 基于联合贝叶斯压缩感知的多极化穿壁雷达成像

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900771

A. Bouzerdoum, F. Tivive, Van Ha Tang

引用次数: 16

Application of automatic speaker verification techniques for forensic evidence evaluation 自动说话人验证技术在法医证据评估中的应用

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900703

A. M. T. S. B. Adikari, S. Devadithya, A. Bandara, K. V. Dharmawardane, K. Wavegedara

{"title":"Application of automatic speaker verification techniques for forensic evidence evaluation","authors":"A. M. T. S. B. Adikari, S. Devadithya, A. Bandara, K. V. Dharmawardane, K. Wavegedara","doi":"10.1109/ICDSP.2014.6900703","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900703","url":null,"abstract":"When applying speaker verification techniques for forensic evidence evaluation, many challenges arise. One such challenge is the interpretation of the verification results in terms of probability. The output of the existing speaker verification is a ratio between two likelihood values and hence does not have a very meaningful representation. In this paper, we introduce a method which outputs a posterior probability function, such that given the evidence, the probability it came from a certain suspect can be calculated. Another key challenge in forensic evidence evaluation is the practical difficulty in recreating the evidence environment in order to obtain the training voice samples from the suspect. For this we propose a novel approach based on the Baysean probability framework, which uses a pre-computed Universal Background Model (UBM). The speaker verification system is built around Mel Frequency Cepstral Coefficients (MFCC) for feature extraction and Gaussian Mixture Models (GMM) for speaker modeling. The optimum values for different parameters of these techniques are found experimentally. Our results demonstrate that a model with 32 mixtures and a dimension of size 13 gives the best performance, as a trade-off between the accuracy and the computational efficiency.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127675456","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

Optimum parameter selection in sparse reconstruction of frequency-domain optical-coherence tomography signals 频域光相干层析成像信号稀疏重建中最优参数选择

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900828

Sunder Ram Krishnan, C. Seelamantula

{"title":"Optimum parameter selection in sparse reconstruction of frequency-domain optical-coherence tomography signals","authors":"Sunder Ram Krishnan, C. Seelamantula","doi":"10.1109/ICDSP.2014.6900828","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900828","url":null,"abstract":"For a multilayered specimen, the back-scattered signal in frequency-domain optical-coherence tomography (FDOCT) is expressible as a sum of cosines, each corresponding to a change of refractive index in the specimen. Each of the cosines represent a peak in the reconstructed tomogram. We consider a truncated cosine series representation of the signal, with the constraint that the coefficients in the basis expansion be sparse. An £2 (sum of squared errors) data error is considered with an £ (summation of absolute values) constraint on the coefficients. The optimization problem is solved using Weiszfeld's iteratively reweighted least squares (IRLS) algorithm. On real FDOCT data, improved results are obtained over the standard reconstruction technique with lower levels of background measurement noise and artifacts due to a strong £1 penalty. The previous sparse tomogram reconstruction techniques in the literature proposed collecting sparse samples, necessitating a change in the data capturing process conventionally used in FDOCT. The IRLS-based method proposed in this paper does not suffer from this drawback.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"407 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134289166","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

Defense against sybil attacks in directed social networks 防御定向社交网络中的sybil攻击

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900836

Pengfei Liu, Xiaohan Wang, Xiangqian Che, Zhaoqun Chen, Yuantao Gu

引用次数: 8

Quaternion-valued robust adaptive beamformer based on widely linear processing 基于广义线性处理的四元数值鲁棒自适应波束形成器

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900758

Xirui Zhang, Zhiwen Liu, Zheyi Fan, Yougen Xu

引用次数: 1

Object detection for military surveillance using distributed multimodal smart sensors 基于分布式多模态智能传感器的军事监视目标检测

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900688

S. Astapov, J. Preden, J. Ehala, A. Riid

引用次数: 21

Design and implementation of a flexible DMA controller in video codec system 视频编解码系统中柔性DMA控制器的设计与实现

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900804

Yinhui Wang, Teng Wang, Pan Zhou, Xin'an Wang

{"title":"Design and implementation of a flexible DMA controller in video codec system","authors":"Yinhui Wang, Teng Wang, Pan Zhou, Xin'an Wang","doi":"10.1109/ICDSP.2014.6900804","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900804","url":null,"abstract":"To meet rigorous high sustained bandwidth demand and exploit the data level access parallelism, a new architecture of DMA controller aiming at multimedia applications is proposed in this paper. Through analyzing the characteristics of video data transfer, we customize four shared channels with block address-conversion algorithm to adapt to many regular memory-access patterns. Furthermore, in order to transfer plenty of macro blocks whose addresses are not consecutive, channel descriptor model is applied into the design, which provides the most flexibility in managing the system's transfers. Besides, the design can also perform boundary extension, priority arbitrage and parameter prefetching as well as data rearrangement process. The proposed design is implemented in H.264/RVC encoder chip by SMIC 65nm technology with a clock frequency of 250MHz and 23.6K equivalent logic gates. Experimental results show that the customized design performs around 2~4 times faster than traditional DMA controller, and the lower ratio of setting time to transfer time proves that the burden of the processor is reduced significantly.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"577 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122764016","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

Rate-perceptual-distortion optimization (RpDO) based picture coding — Issues and challenges 基于速率感知失真优化(RpDO)的图像编码-问题与挑战

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900770

H. Wu, Weisi Lin, K. Ngan

{"title":"Rate-perceptual-distortion optimization (RpDO) based picture coding — Issues and challenges","authors":"H. Wu, Weisi Lin, K. Ngan","doi":"10.1109/ICDSP.2014.6900770","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900770","url":null,"abstract":"Perceptual image and video coders have been reported extensively in the literature with a recent survey listing sixteen representative PVCs (perceptual video coders) for single-view video coding, ten of which conform to H.263, MPEG-4 or H.264/AVC international standard. Successful approaches to perceptual picture coding are classified as perceptual predictive coding, perceptual quantization, rate-perceptual-distortion optimization (RpDO) and perception-based pre-, loop- and post-filtering. This contribution analyzes and examines the performance and tradeoffs of representative perceptual as well as traditional waveform based picture coding methods in terms of their effectiveness in quality constrained coding and RpDO criterion in the context of visual quality controlled or regulated visual communication, broadcasting, entertainment and consumer electronic products, systems and services or applications. Fundamental flaws of performance benchmarking using a rate-driven coding strategy are interrogated for visual quality assured services or user experience. It is revealed that while existing perceptual distortion measures (PDMs) successfully grade distortions corresponding to HVS (human visual system) perception, their quantitative correspondence, or lack of it, to discernible levels by human visual perception in terms of just-not-noticeable-difference (JNND), just-noticeable-difference level 1 (JND1), JND level 2 (JND2), etc. has not been thoroughly investigated nor established, and this motivates the related initial work reported in this paper. Issues and constraints of existing picture coding standards are discussed in the context of developing a future picture coding standard framework for constant visual picture quality systems and services.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129845203","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: 7

Learning sparse dictionaries for music and speech classification 学习稀疏字典的音乐和语音分类

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900749

M. Srinivas, Debaditya Roy, C. Mohan

引用次数: 45

Stereo correspondence using multi-label QPBO method 基于多标签QPBO方法的立体通信

2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900823

Sangsan Leelhapantu, T. Chalidabhongse

引用次数: 2