A new image coding technique for achieving an extremely high compression ratio while producing good image quality is described. The idea is analogous to that used in forensic applications when constructing a composite...
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A new image coding technique for achieving an extremely high compression ratio while producing good image quality is described. The idea is analogous to that used in forensic applications when constructing a composite image of a criminal from a collection of images of facial features. The imput image is segmented into complicated primitives that are coded using previously constructed database of primitives. A duplicate database is used at the receiver to decode the primitives. The decoded primitives are assembled as in computer animation to produce a faithful reconstruction of the original image. The technique has been applied to head-and-shoulders images and compression ratios over 1000:1 have been achieved.< >
An overview is presented of results obtained in listeners with real and simulated impairments. Spectral processing is assessed by psychoacoustical tuning curves and growth-of-masking functions; temporalprocessing is ...
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An overview is presented of results obtained in listeners with real and simulated impairments. Spectral processing is assessed by psychoacoustical tuning curves and growth-of-masking functions; temporalprocessing is assessed by temporal integration and gap detection thresholds. When comparisons are made to normal listeners tested in the quiet, impaired listeners generally show deficits on all these tasks. When the comparisons are made to simulated impairments, some impaired listeners show no deficits, whereas others still show deficits. These results indicate that abnormal intensity perception is responsible for some, but not all, of impaired listeners' apparent deficits in spectral and temporalprocessing. In many cases, however, it appears that spectral and temporalprocessing, per se, are altered in the impaired auditory system.< >
A system-theoretic approach provides a unified framework within which the boundary implications in parameter space of univariate as well as multivariate polynomials can be analyzed in order that specified domains or p...
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A system-theoretic approach provides a unified framework within which the boundary implications in parameter space of univariate as well as multivariate polynomials can be analyzed in order that specified domains or polydomains are devoid of zeros of such polynomials. The approach also suggests generalizations to noninterval polynomials and interval rational functions of the analysis of properties that include robust stability as a special case.< >
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