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ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)最新文献

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Adaptive thresholding method for binarization blueprint images 蓝图图像二值化的自适应阈值方法
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.815824
Mansuo Zhao, Hong Yan
{"title":"Adaptive thresholding method for binarization blueprint images","authors":"Mansuo Zhao, Hong Yan","doi":"10.1109/ISSPA.1999.815824","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.815824","url":null,"abstract":"This paper describes a method to threshold blueprint images based on geometrical features. Scanned blueprint images often contain a lot of noise, which was produced in the process when the original map was printed on the blue paper and smudged due to long time storage. To remove the noise and extract the lines and numbers are a difficult task. We propose a new method which utilizes geometrical features combined with gray level analysis to threshold the blueprint image. The result shows a good performance compared with Otsu's (1979) method, Nilblack's method and other methods.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133719251","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
Robust adaptive equalization using the filtered-X LMS algorithm 使用滤波- x LMS算法的鲁棒自适应均衡
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818201
Jiankun Hu, H. Wu
{"title":"Robust adaptive equalization using the filtered-X LMS algorithm","authors":"Jiankun Hu, H. Wu","doi":"10.1109/ISSPA.1999.818201","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818201","url":null,"abstract":"The filtered-X LMS algorithm is currently the most popular method for adaptive filter design when there exists a transfer function in the error path. We introduce and modify this concept in the application of adaptive equalization for communication channels. A computer experiment was conducted on the equalization of a time-varying communication channel using both conventional LMS and modified filtered-X LMS algorithms. Monte Carlo simulation results demonstrate that the filtered-X has a better robust performance than that of the conventional LMS.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132122482","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
FIR filter design and implementation on reconfigurable computing technology 基于可重构计算技术的FIR滤波器设计与实现
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818192
Anwar S. Dawood, Zulfi Asdani, B. Bravo
{"title":"FIR filter design and implementation on reconfigurable computing technology","authors":"Anwar S. Dawood, Zulfi Asdani, B. Bravo","doi":"10.1109/ISSPA.1999.818192","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818192","url":null,"abstract":"This paper elaborates on the design and implementation of a finite impulse response (FIR) filter on reconfigurable computing technology (RCT). RCT uses field programmable gate array (FPGA) technology as a flexible platform for implementing and improving the design. The FPGA used for this design is the Xilinx XC4062 chip. The paper outlines the advantages of using RCT in improving the performance of the designed digital filter. It describes the methodology followed throughout the design, analysis, verification, simulation, and test of the digital circuit. The design methodology does scale to more complex functions and architectures.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134298425","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
An overview of the multistatic sonar program in Australia 澳大利亚多基地声呐项目概述
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818177
M. Swift, J. Riley, S. Lourey, L. Booth
{"title":"An overview of the multistatic sonar program in Australia","authors":"M. Swift, J. Riley, S. Lourey, L. Booth","doi":"10.1109/ISSPA.1999.818177","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818177","url":null,"abstract":"With the advent of quiet contacts, passive detection is becoming increasingly more difficult. One method of increasing the detection capabilities of the Australian Defence Force is the use of multistatic active sonar systems. A multistatic system places the source and multiple receivers in different locations. This allows the problem of dead zones to be overcome giving greater coverage. One such system is Bistatic Barra that uses both an incoherent or coherent source and a Barra sonobuoy for the receiver. This paper describes the advantages that a multistatic system has over a monostatic system using the example of a Bistatic Barra system and shows some results obtained from trials undertaken comparing the Barra sonobuoy with a Difar sonobuoy.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134406057","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: 15
Nearfield broadband adaptive beamforming 近场宽带自适应波束形成
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.815802
T. Abhayapala, R. Kennedy, R. C. Williamson, D. Ward
{"title":"Nearfield broadband adaptive beamforming","authors":"T. Abhayapala, R. Kennedy, R. C. Williamson, D. Ward","doi":"10.1109/ISSPA.1999.815802","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.815802","url":null,"abstract":"A nearfield broadband adaptive beamforming approach based on the modal expansion of the solution to the spherical wave equation is formulated. It provides an efficient parameterization for the nearfield beamforming problem with a single parameter to focus the beamformer to a desired operating radius and a set of modal coefficients to control the angular response. As a consequence, the adaptive beamformer has a frequency invariant response for nearfield sources, decorrelates coherent interferers (thus combating signal cancellation) and has a smaller number of parameters to be adapted compared to a conventional beamformer. A simulation example is presented to demonstrate the use of the proposed method in microphone array applications in speech acquisition systems.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134148399","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: 11
Speech-to-text translation by a non-word lexical unit based system 基于非单词词汇单位系统的语音到文本翻译
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818125
M. Peñagarikano, Germán Bordel
{"title":"Speech-to-text translation by a non-word lexical unit based system","authors":"M. Peñagarikano, Germán Bordel","doi":"10.1109/ISSPA.1999.818125","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818125","url":null,"abstract":"Speech understanding applications where a word based output of the uttered sentence is not needed, can benefit from the use of alternative lexical units. Experimental results from these systems show that the use of non-word lexical units bring us a new degree of freedom in order to improve the system performance (better recognition rate and lower size can be obtained in comparison to word based models). However, if the aim of the system is a speech-to-text translation, a post-processing stage must be included in order to convert the non-word sequences into word sentences. In this paper a technique to perform this conversion as well as an experimental test carried out over a task oriented Spanish corpus are reported. As a conclusion, we see that the whole speech-to-text system neatly outperforms the word-constrained baseline system.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130352465","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
Psychoacoustical excitation of the (N)LMS algorithm for acoustical system identification 声学系统识别中(N)LMS算法的心理声激励
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.815843
M. Peters
{"title":"Psychoacoustical excitation of the (N)LMS algorithm for acoustical system identification","authors":"M. Peters","doi":"10.1109/ISSPA.1999.815843","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.815843","url":null,"abstract":"This paper presents an algorithm and an implementation of orthogonal perfect correlation sequences for acoustical system identification using psychoacoustical masking effects. Therefore, the common NLMS-algorithm has been modified to incorporate hidden orthogonal Ipatov- and Huffman-sequences for fast system identification. Using this method, the speed and accuracy of the identification of the loudspeaker-room-microphone-system is increased and the overall-performance of an echo and noise cancellation has been improved.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115212154","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
Design of a DSP system for automatic detection of seizure signals in newborns 新生儿癫痫信号自动检测的DSP系统设计
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818184
B. Boashash, M. Keir
{"title":"Design of a DSP system for automatic detection of seizure signals in newborns","authors":"B. Boashash, M. Keir","doi":"10.1109/ISSPA.1999.818184","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818184","url":null,"abstract":"Considers the problem of processing EEG, ECG, EOG and motion signals recorded from a newborn, for the purpose of detection of epileptic seizures. We describe the proposed approach, and discuss how the signals will be analysed and combined to detect the occurrence of seizure.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114406188","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
Multimedia computing-a new object-oriented paradigm 多媒体计算——一种新的面向对象范式
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818100
R. González
{"title":"Multimedia computing-a new object-oriented paradigm","authors":"R. González","doi":"10.1109/ISSPA.1999.818100","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818100","url":null,"abstract":"Apart from certain highly specialised domains, current generic support for audio and visual data in computing systems is based on classical signal processing approaches that consider the data to consist of only a single or multidimensional array of sample values. No structural significance is considered to exist in this data set except from low-order statistical relationships between the values. This limits utility and application of the data within computing systems. As the prevalence of multimedia computing and systems increases the need for a new paradigm capable of supporting generic content-based, object-oriented access and processing across a wide range of domains has become apparent. This paper explores the evolution of content-based, object-oriented multimedia computing and presents a new paradigm for its realisation.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114465446","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 improved model for speech excitation using time-frequency characterisation 基于时频特性的语音激励改进模型
ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359) Pub Date : 1999-08-22 DOI: 10.1109/ISSPA.1999.818109
S. Ghaemmaghami, Mohamed Deriche
{"title":"An improved model for speech excitation using time-frequency characterisation","authors":"S. Ghaemmaghami, Mohamed Deriche","doi":"10.1109/ISSPA.1999.818109","DOIUrl":"https://doi.org/10.1109/ISSPA.1999.818109","url":null,"abstract":"This paper introduces a new method for approximating the excitation signal in a linear predictive coding (LPC) model over both time and frequency domains. In the frequency domain, a new two-band excitation model is proposed for decomposing the signal spectrum into two periodic and non-periodic components using the smoothed Wigner-Ville (SWV) distribution. This model provides high resolution in the time-frequency plane which gives accurate information about pitch and voicing. The periodic component is then analysed with a new \"multi-pulse\" like technique to approximate the signal in the time domain through repeating a representative pattern across each frame. It is shown that combining the spectral and the temporal models improves significantly over the performance of our earlier model for the excitation and gives a good approximation to the signal for most speech sounds. Evaluation results show that the proposed coding method operating at 2400 b/s outperforms current standard coders at similar rate.","PeriodicalId":302569,"journal":{"name":"ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115263774","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
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