{"title":"Classification of co-channel communication signals using cyclic cumulants","authors":"C. Spooner","doi":"10.1109/ACSSC.1995.540605","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540605","url":null,"abstract":"Traditional methods of signal classification, including phase and frequency histograms, modulus measurements, and power-spectrum measurements, fail when the signal-to-noise ratio is sufficiently low or when there are interfering signals present. These methods fail because the interfering signals and noise contribute substantially to the measured values of the classification features, thereby obscuring the contribution to the measurement from the signal of interest. The required signal selectivity of classification features for this situation can, in some instances be provided by features based on the cyclostationarity of both the signal of interest and the interferers. A set of cyclic-cumulant-based features for signal classification is proposed and analyzed, and results of classification experiments using simulated data are presented. The simulation results reveal that each of a number of spectrally overlapping signals can be successfully classified by measuring and processing the proposed features.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115682048","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}
{"title":"Hardware/software codesign for signal processing systems. A survey and new results","authors":"J. Debardelaben, V. Madisetti","doi":"10.1109/ACSSC.1995.540912","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540912","url":null,"abstract":"At least six different hardware/software codesign methodologies have been proposed for rapid prototyping in the past few years. Some of these describe the various process steps without providing specifics for implementation. Others focus more on implementation issues without explicitly considering methodology and process flow. We propose a new industry-driven rapid prototyping codesign methodology for signal processing applications which uses parametric cost estimation tools to minimize development cost, while maximizing product profits. Mixed integer programming formulations are used to model the architecture selection and partitioning process steps. Our approach, as part of ARPA's RASSP program, utilizes a hardware-less VHDL cosimulation and co-verification methodology for rapid prototyping which supports solutions for high performance signal processing applications.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124521843","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}
{"title":"An efficient structure and algorithm for the mixed transform representation of signals","authors":"A. P. Berg, W. Mikhael","doi":"10.1109/ACSSC.1995.540861","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540861","url":null,"abstract":"Mixed transform coders have been shown to consistently yield higher signal quality than those based on one transform for a fixed compression ratio. However, these coders have not been widely employed due to the very high computational complexity of formulations. This paper presents a new parallel mixed transform technique employing a novel projection algorithm for signal representation. Formulations are derived, algorithms are described and results of simulations are presented. Excellent performance is achieved with much less computation than required by existing mixed transform techniques, making real-time implementations possible.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117117791","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}
{"title":"Chaotic characterization of sea clutter: new experimental results and novel applications","authors":"S. Haykin","doi":"10.1109/ACSSC.1995.540865","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540865","url":null,"abstract":"The paper begins by summarizing previously reported research findings on the chaotic characterization of sea clutter, obtained using an instrument-quality radar. Then, after a brief review of chaos theory, experimental results are presented using data recorded from two commercial marine radars. These new results provide further confirmation that sea clutter is indeed chaotic. The paper finishes by presenting novel applications on clutter simulation and clutter cancellation that build on the chaotic character of sea clutter.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121046753","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}
{"title":"Array processing and generalized inverses","authors":"L. Sibul","doi":"10.1109/ACSSC.1995.540587","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540587","url":null,"abstract":"A basic function of array processing is to estimate the spatial location of disturbed or discrete radiating and scattering sources. We show that classical beamformers, optimum array processors, matched field and matched mode processors can be cast into the unified framework of generalized inverse theory.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127119169","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}
{"title":"Output-based objective speech quality using vector quantization techniques","authors":"Chiyi, Robert Kubichek","doi":"10.1109/ACSSC.1995.540907","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540907","url":null,"abstract":"Output-based speech quality (OBQ) refers to an objective speech quality measure that uses only received speech without access to the input speech record. This paper proposes two new OBQ measures and evaluates their performance. Perceptual linear prediction (PLP) coefficients are used to provide speaker independence required by the objective measure. Two distortion measures are introduced for predicting speech quality based on vector quantization of the output speech record. These are the transition probability distance and the median minimum distance measure. The OBQ parameters are tested on four different speech datasets. The correlation is computed between subjective scores and the objective quality measures under a variety conditions, and the results indicate that the proposed algorithms are quite robust against speaker, text and distortion variation.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124955565","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}
{"title":"Adaptive quantization without side information using scalar-vector quantization and trellis coded quantization","authors":"Y. Yoo, Antonio Ortega","doi":"10.1109/ACSSC.1995.540928","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540928","url":null,"abstract":"We combine backward adaptive quantization with the scalar-vector quantizer (SVQ) and the trellis coded quantizer (TCQ) both of which have an underlying scalar quantizer (USQ) in their structure. The resulting adaptive scalar-vector quantizer (ASVQ) and adaptive trellis coded quantizer (ATCQ) redesign the USQ based on the past quantized outputs. The adaptive quantizers require no side information and also outperform the SVQ and the TCQ, respectively, when the input signal is non-stationary. For an input sequence from a bimodal source switching infrequently between two Gaussian distributions with the same mean and different variances, both adaptive quantizers achieve performance gains of more than 1.3 dB over the non-adaptive quantizers designed on the training set from the same bimodal source. Also the adaptive quantizers demonstrate minimal performance degradation due to adaptation when stationary inputs are considered.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125133076","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}
{"title":"Text segmentation using linear transforms","authors":"N. Chaddha, A. Gupta","doi":"10.1109/ACSSC.1995.540937","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540937","url":null,"abstract":"Block-based linear transforms have found widespread use in image and video compression. However popular compression algorithms using such transforms, such as JPEG, which are very effective in compressing continuous tone images, do not perform well on mixed-mode images which have a substantial text component. With a growing number of applications where such images occur, e.g., color facsimile, digital libraries and educational videos, there are advantages in being able to classify each block as being text or continuous tone. With such a classification, different compression parameters or even algorithms may be employed for the two kinds of data to obtain high compression with minimal loss in visual quality. In this paper we propose algorithms for text segmentation based on a variety of linear transforms. We analyze the algorithms based on the accuracy and robustness of segmentation. Our results show that any of the popular linear transforms (DCT, DHT, DFT, WHT, DWT) can be used for accurate and robust text segmentation. An important practical implication of our results is that system designers can now use the same transform for both segmentation and compression, thus obtaining substantial savings in computational cost while improving quality.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126043951","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}
M. Vishwanath, B. Preas, A. Mendhekar, D. Mukherjee, R. Owens
{"title":"The design and implementation of a reconfigurable board for rapid prototyping of a class of image processing algorithms","authors":"M. Vishwanath, B. Preas, A. Mendhekar, D. Mukherjee, R. Owens","doi":"10.1109/ACSSC.1995.540914","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540914","url":null,"abstract":"Previously, rapid prototyping approaches have addressed the needs of rapidly building specific hardware. We are taking a different approach to this problem and are viewing it as rapid prototyping of algorithms within a domain. This approach is useful when hardware acceleration is required, but the design entity is the image transformation algorithm rather than the hardware to perform the transformation. To experiment with this methodology we have designed and built boards which support a class of image processing algorithms that are dependent on streaming multiply-accumulates and table lookups.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123436282","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}
{"title":"/spl alpha/-weighted cumulant projections: a novel tool for system identification","authors":"U. Abeyratne, A. Petropulu","doi":"10.1109/ACSSC.1995.540944","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540944","url":null,"abstract":"We propose a new tool, the /spl alpha/-weighted cumulant projection (/spl alpha/-WCP), which is an one-dimensional projection of the exponentially weighted n/sup th/ order cumulants of a process. We show that a real, stable and generally nonminimum phase LTI system can be identified from a single projection, whereas a complex system requires two projections corresponding to two different values of the weight /spl alpha/. We develop two methods for system identification, one based on the complex cepstrum of /spl alpha/-WCP and the other based on the Fourier-phase of /spl alpha/-WCP. The proposed methods exhibit comparable statistical performance and substantially lower computational complexity compared to existing higher-order spectra based techniques.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125289185","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}