Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028158
Anssi Klapuri, J. Astola
An algorithm is proposed which calculates a computationally efficient approximation of a certain physiologically-motivated representation for sound, called the summary autocorrelation function. This representation has been found very useful in several tasks, such as sound separation, multiple period estimation, and computational auditory scene analysis. However, it has been computationally too complex for most practical applications. The relatively fast algorithm described here proposes only an approximation of the summary autocorrelation function, but the achieved precision is likely to be good enough for most applications.
{"title":"Efficient calculation of a physiologically-motivated representation for sound","authors":"Anssi Klapuri, J. Astola","doi":"10.1109/ICDSP.2002.1028158","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028158","url":null,"abstract":"An algorithm is proposed which calculates a computationally efficient approximation of a certain physiologically-motivated representation for sound, called the summary autocorrelation function. This representation has been found very useful in several tasks, such as sound separation, multiple period estimation, and computational auditory scene analysis. However, it has been computationally too complex for most practical applications. The relatively fast algorithm described here proposes only an approximation of the summary autocorrelation function, but the achieved precision is likely to be good enough for most applications.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121730318","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028293
Min Lei, Zhizhong Wang, Zhengjin Feng
For nonlinear dynamic analysis of the experiment data, one often uses SVD decomposition to reconstruct embedding dimension of attractor because of its simpleness. However, it is hardly for singular value decomposition (SVD) decomposition to get good results in the attractor reconstruction of the experiment data. For this, symplectic geometry method is proposed to estimate embedding dimension of reconstruction attractor in this paper. We illustrate the feasibility of this method and give the embedding dimension of the action surface EMG signal.
{"title":"The application of symplectic geometry on nonlinear dynamics analysis of the experimental data","authors":"Min Lei, Zhizhong Wang, Zhengjin Feng","doi":"10.1109/ICDSP.2002.1028293","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028293","url":null,"abstract":"For nonlinear dynamic analysis of the experiment data, one often uses SVD decomposition to reconstruct embedding dimension of attractor because of its simpleness. However, it is hardly for singular value decomposition (SVD) decomposition to get good results in the attractor reconstruction of the experiment data. For this, symplectic geometry method is proposed to estimate embedding dimension of reconstruction attractor in this paper. We illustrate the feasibility of this method and give the embedding dimension of the action surface EMG signal.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122890076","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028321
Jong-Myon Kim, Soojung Ryu, A. Gentile, L. Wills, D. S. Wills
Vector median filters efficiently reduce noise while preserving image details. However, their high computational complexity for color images makes them impractical for real-time systems. We propose new computationally efficient filtering algorithms, called index mapping filters (IMF). These filtering algorithms are accelerated by implementing them on a massively data parallel processor array. In addition to greater computational efficiency, these algorithms result in robust noise reduction of corrupted color images. Analyses of mean square error, signal-to-noise-ratio, and visual comparison metrics indicate that IMF are competitive with the vector median filter (VMF) in their ability to correct impulse noise in color images. These algorithms are implemented on a SIMD processor array being developed for high efficiency, high-performance portable products. Executing on a 4096 node SIMD chip operating at 50 MHz, IMF 3/spl times/3 window applied to a 256/spl times/256 color image would take 442 microseconds (22104 clock cycles) for index mapping distance filter (IMDF) and 408 microseconds (20415 clock cycles) for index mapping median filter (IMMF).
{"title":"Impulse noise removal on an embedded, low memory SIMD processor","authors":"Jong-Myon Kim, Soojung Ryu, A. Gentile, L. Wills, D. S. Wills","doi":"10.1109/ICDSP.2002.1028321","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028321","url":null,"abstract":"Vector median filters efficiently reduce noise while preserving image details. However, their high computational complexity for color images makes them impractical for real-time systems. We propose new computationally efficient filtering algorithms, called index mapping filters (IMF). These filtering algorithms are accelerated by implementing them on a massively data parallel processor array. In addition to greater computational efficiency, these algorithms result in robust noise reduction of corrupted color images. Analyses of mean square error, signal-to-noise-ratio, and visual comparison metrics indicate that IMF are competitive with the vector median filter (VMF) in their ability to correct impulse noise in color images. These algorithms are implemented on a SIMD processor array being developed for high efficiency, high-performance portable products. Executing on a 4096 node SIMD chip operating at 50 MHz, IMF 3/spl times/3 window applied to a 256/spl times/256 color image would take 442 microseconds (22104 clock cycles) for index mapping distance filter (IMDF) and 408 microseconds (20415 clock cycles) for index mapping median filter (IMMF).","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125163067","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028326
S. J. Park, D. Youn, S. H. Park
For hands-free mobile terminals, it is desirable to implement an acoustic interference cancellation system comprising echo cancellation and noise reduction. In the present paper, an approach to integrate acoustic echo cancellation and noise reduction in hands-free communication is described. For enhanced performance of the system, a method of canceling the residual acoustic interference after echo cancellation is treated. A parameter originating from the cross-correlation property is proposed to control the integrated system.
{"title":"Acoustic interference cancellation for hands-free terminals","authors":"S. J. Park, D. Youn, S. H. Park","doi":"10.1109/ICDSP.2002.1028326","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028326","url":null,"abstract":"For hands-free mobile terminals, it is desirable to implement an acoustic interference cancellation system comprising echo cancellation and noise reduction. In the present paper, an approach to integrate acoustic echo cancellation and noise reduction in hands-free communication is described. For enhanced performance of the system, a method of canceling the residual acoustic interference after echo cancellation is treated. A parameter originating from the cross-correlation property is proposed to control the integrated system.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126229641","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028153
P. Campisi, A. Neri, L. Sorgi
Due to the enormous amount of information contained in multimedia databases, the design of automatic tools to allow content-based analysis, browsing, and retrieval is of paramount importance. We present an algorithm tailored to the detection of editing effects such as dissolve and fade, which are widely used in television and movie production. A computationally inexpensive, although effective, correlation based algorithm is presented. The experimental results highlight the effectiveness of the proposed method.
{"title":"Automatic dissolve and fade detection for video sequences","authors":"P. Campisi, A. Neri, L. Sorgi","doi":"10.1109/ICDSP.2002.1028153","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028153","url":null,"abstract":"Due to the enormous amount of information contained in multimedia databases, the design of automatic tools to allow content-based analysis, browsing, and retrieval is of paramount importance. We present an algorithm tailored to the detection of editing effects such as dissolve and fade, which are widely used in television and movie production. A computationally inexpensive, although effective, correlation based algorithm is presented. The experimental results highlight the effectiveness of the proposed method.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125857306","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028236
N. Milisavjeviae, A. Yarovoy
A new algorithm is proposed for subsurface object detection and 3D localization using ground-penetrating radar (GPR) data, if GPR antennas are slightly elevated above the ground. Due to an effective approximation, the algorithm solves problems linked to calculating the position of the refracting point of electromagnetic waves on the air-ground interface. We present how the typical hyperbolic object signature can be detected on a B-scan. Then, we argue that only one surface coordinate can be extracted from the hyperbola detected in one B-scan, so that additional information is needed to find the transverse object position. We show that an antenna configuration with two receive antennas solves this problem. The problem of extracting the third object coordinate as well as the propagation velocity of electromagnetic waves in the ground is also addressed. The algorithm is illustrated on a data set acquired by this antenna configuration.
{"title":"Position determination of a subsurface object by combined output of two receive GPR antennas","authors":"N. Milisavjeviae, A. Yarovoy","doi":"10.1109/ICDSP.2002.1028236","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028236","url":null,"abstract":"A new algorithm is proposed for subsurface object detection and 3D localization using ground-penetrating radar (GPR) data, if GPR antennas are slightly elevated above the ground. Due to an effective approximation, the algorithm solves problems linked to calculating the position of the refracting point of electromagnetic waves on the air-ground interface. We present how the typical hyperbolic object signature can be detected on a B-scan. Then, we argue that only one surface coordinate can be extracted from the hyperbola detected in one B-scan, so that additional information is needed to find the transverse object position. We show that an antenna configuration with two receive antennas solves this problem. The problem of extracting the third object coordinate as well as the propagation velocity of electromagnetic waves in the ground is also addressed. The algorithm is illustrated on a data set acquired by this antenna configuration.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129746343","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028154
Vladimir Zlokolica, W. Philips, D. Ville
Noise removal techniques, such as the K-nearest neighbour filter and the /spl alpha/-trimmed mean filter, are known to be very robust in still image noise removal, but they have not been exploited in video processing. We investigate their 3D-extension for use in video sequence noise removal. We also determine the optimal balance between temporal and spatial window size, the optimal values of the other parameters and finally we investigate the artefacts introduced by the filters. The results show that the new video K-nearest neighbour filter outperforms the video version of the /spl alpha/-trimmed mean and the state-of-the-art rational filter by G. Ramponi from both a PSNR and a visual quality point of view.
{"title":"Robust non-linear filtering for video processing","authors":"Vladimir Zlokolica, W. Philips, D. Ville","doi":"10.1109/ICDSP.2002.1028154","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028154","url":null,"abstract":"Noise removal techniques, such as the K-nearest neighbour filter and the /spl alpha/-trimmed mean filter, are known to be very robust in still image noise removal, but they have not been exploited in video processing. We investigate their 3D-extension for use in video sequence noise removal. We also determine the optimal balance between temporal and spatial window size, the optimal values of the other parameters and finally we investigate the artefacts introduced by the filters. The results show that the new video K-nearest neighbour filter outperforms the video version of the /spl alpha/-trimmed mean and the state-of-the-art rational filter by G. Ramponi from both a PSNR and a visual quality point of view.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131306457","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028164
P. Maragos, T. Loupas, Vassilis Pitsikalis
This paper deals with improving the time-frequency resolution of Doppler ultrasound spectroscopy, applied to blood flow analysis, by developing robust nonstationary spectrum estimation techniques based on Gabor (1946) filterbanks and multiband AM-FM demodulation that uses an instantaneous energy separation algorithm.
{"title":"Improving Doppler ultrasound spectroscopy with multiband instantaneous energy separation","authors":"P. Maragos, T. Loupas, Vassilis Pitsikalis","doi":"10.1109/ICDSP.2002.1028164","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028164","url":null,"abstract":"This paper deals with improving the time-frequency resolution of Doppler ultrasound spectroscopy, applied to blood flow analysis, by developing robust nonstationary spectrum estimation techniques based on Gabor (1946) filterbanks and multiband AM-FM demodulation that uses an instantaneous energy separation algorithm.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"146 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127299712","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028219
Manish Arora, V. SureshBabuP., K. VinayM.
Mobile multimedia messaging (MMS) promises to provide a richer and versatile experience to the user along with new revenue streams for mobile service operators. MMS allows a full content range including images, audio, video and text in any combination. It delivers a location independent, total communication experience to the mobile customer. As proved by the success of short message service (SMS) in generating revenue MMS applications would be the essential drivers of continuous growth in new services beyond voice. Current programmable mobile handsets could suffice as platforms for simple MMS service introduction if the existing capability of the RISC processor of the handset is exercised fully. Speech, an important content in MMS has traditionally been encoded and decoded on DSP processors. This paper describes the challenges and techniques of implementing speech codecs on RISC processors. The specific speech codec implemented was GSM-AMR and the processor used was ARM9TDMI. The techniques described are generic and applicable to any speech codec and RISC processor platform.
{"title":"RISC processor based speech codec implementation for emerging mobile multimedia messaging solutions","authors":"Manish Arora, V. SureshBabuP., K. VinayM.","doi":"10.1109/ICDSP.2002.1028219","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028219","url":null,"abstract":"Mobile multimedia messaging (MMS) promises to provide a richer and versatile experience to the user along with new revenue streams for mobile service operators. MMS allows a full content range including images, audio, video and text in any combination. It delivers a location independent, total communication experience to the mobile customer. As proved by the success of short message service (SMS) in generating revenue MMS applications would be the essential drivers of continuous growth in new services beyond voice. Current programmable mobile handsets could suffice as platforms for simple MMS service introduction if the existing capability of the RISC processor of the handset is exercised fully. Speech, an important content in MMS has traditionally been encoded and decoded on DSP processors. This paper describes the challenges and techniques of implementing speech codecs on RISC processors. The specific speech codec implemented was GSM-AMR and the processor used was ARM9TDMI. The techniques described are generic and applicable to any speech codec and RISC processor platform.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121209698","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}
Pub Date : 2002-11-07DOI: 10.1109/ICDSP.2002.1028143
C. Loizou, C. Demetriou, C. Pattichis, R. Istepanian, M. Pantziaris, A. Nicolaides
The objective of this work was to develop six speckle reduction-filtering techniques and evaluate them together with texture analysis in the assessment of 240 ultrasound images of the carotid artery. The de-speckled filters are based on anisotropic diffusion, local statistics with higher moments, and geometric filtering. Results showed that some improvement in class separation (between symptomatic and asymptomatic plaques) of the images was evident after de-speckle filtering.
{"title":"Speckle reduction in ultrasound images of atherosclerotic carotid plaque","authors":"C. Loizou, C. Demetriou, C. Pattichis, R. Istepanian, M. Pantziaris, A. Nicolaides","doi":"10.1109/ICDSP.2002.1028143","DOIUrl":"https://doi.org/10.1109/ICDSP.2002.1028143","url":null,"abstract":"The objective of this work was to develop six speckle reduction-filtering techniques and evaluate them together with texture analysis in the assessment of 240 ultrasound images of the carotid artery. The de-speckled filters are based on anisotropic diffusion, local statistics with higher moments, and geometric filtering. Results showed that some improvement in class separation (between symptomatic and asymptomatic plaques) of the images was evident after de-speckle filtering.","PeriodicalId":351073,"journal":{"name":"2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122352611","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}
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