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- The method of reassignment is a technique forsharpening a time-frequency representation by mappingthe data to time-frequency coordinates that are nearer tothe true region of support of theanalyzed signal. The method has been independentlyintroduced by several parties under various names, includingmethod of reassignment, remapping, time-frequency reassignment, and modified moving-window method. Inthe case of the spectrogram or the short-time Fourier transform, the method of reassignment sharpens blurrytime-frequency data by relocating the data according tolocal estimates of instantaneous frequency and group delay.This mapping to reassigned time-frequency coordinates isvery precise for signals that are separable in time andfrequency with respect to the analysis window. (en)
- 重新分布法(英語:Reassignment Method)是一種銳化訊號之時頻表示的方法,藉由將資料映射至較靠近原始訊號之真實支撐區域的時頻座標來實現。此方法曾被不同學者獨立提出,並有重映射(remapping)、時頻重新分布(time-frequency reassignment)以及修正滑動視窗法(modified moving-window method)等別稱。以時頻譜或短時距傅立葉變換而言,重新分布法可藉由估算局部的瞬時頻率以及群延遲,使模糊的時頻資料點重新定位並清晰化。當訊號可藉由分析視窗進行時域和頻域的分離時,這項時頻座標的重新映射是相當精準的。 (zh)
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- The method of reassignment is a technique forsharpening a time-frequency representation by mappingthe data to time-frequency coordinates that are nearer tothe true region of support of theanalyzed signal. The method has been independentlyintroduced by several parties under various names, includingmethod of reassignment, remapping, time-frequency reassignment, and modified moving-window method. Inthe case of the spectrogram or the short-time Fourier transform, the method of reassignment sharpens blurrytime-frequency data by relocating the data according tolocal estimates of instantaneous frequency and group delay.This mapping to reassigned time-frequency coordinates isvery precise for signals that are separable in time andfrequency with respect to the analysis window. (en)
- 重新分布法(英語:Reassignment Method)是一種銳化訊號之時頻表示的方法,藉由將資料映射至較靠近原始訊號之真實支撐區域的時頻座標來實現。此方法曾被不同學者獨立提出,並有重映射(remapping)、時頻重新分布(time-frequency reassignment)以及修正滑動視窗法(modified moving-window method)等別稱。以時頻譜或短時距傅立葉變換而言,重新分布法可藉由估算局部的瞬時頻率以及群延遲,使模糊的時頻資料點重新定位並清晰化。當訊號可藉由分析視窗進行時域和頻域的分離時,這項時頻座標的重新映射是相當精準的。 (zh)
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- Reassignment method (en)
- 重新分布法 (zh)
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