Recursive Time-Frequency Reassignment
نویسندگان
چکیده
منابع مشابه
Joint recursive implementation of time - frequency representations and their modified version by the reassignment method
Cohen's class time-frequency distributions (CTFDs) have significant potential for the analysis of non-stationary signals, even if the poor readability of their representations makes visual interpretations difficult. To concentrate signal components, Auger and Flandrin recently generalized the reassignment method (first applied to the spectrogram in the 1970s) to any bilinear representations. Un...
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Time-frequency reassignment is a relatively old but under-explored method for time frequency analysis. This report reviews previous research on reassignment and relates it to instantaneous frequency in an explicit and novel way. New measures based on reassignment of the amplitude spectrum, as opposed to the traditional phase spectrum, are proposed and analysed. The statistical properties of rea...
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Time-frequency reassignment may be viewed as a refinement of the short-time Fourier transform, in which phase information is used to reduce the smearing of energy associated with the standard spectrogram. However, even given the perceptibly clearer visual representation yielded by the reassignment method in the case of musical signals, the task remains of extracting useful information from it f...
متن کاملA Unified Theory of Time-Frequency Reassignment
Time-frequency representations such as the spectrogram are commonly used to analyze signals having a time-varying distribution of spectral energy, but the spectrogram is constrained by an unfortunate tradeoff between resolution in time and frequency. A method of achieving high-resolution spectral representations has been independently introduced by several parties. The technique has been variou...
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ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 2009
ISSN: 1053-587X,1941-0476
DOI: 10.1109/tsp.2009.2020355