GUI audio signal processing
2016-08-23
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1, the signal frequency, amplitude, and phase estimation (1) frequency (cycles) for detection of periodic signals, time-domain waveform analysis to determine the signal cycle, that is, calculate adjacent signal wave time difference, or zero time lag. Using zero-crossing point (TI) time t (cycle). The frequency is f = 1/T, because it can obtain more t values (TI has more than one), so their estimate of the average cycle. (2) site value detection in a cycle within, seeking out signal maximum value ymax and minimum value ymin of poor of half, that a, = (ymax-ymin)/2, also, also will seeking out multiple a, value, but 1th a a, value corresponds to of ymax and ymin not in a cycle within search get of, so to except 1th a yiwai of a, value of average as site value of estimated value. (3) the phase detection using zero-crossing method, namely by judging the zero phase signal zero-crossing point with the same frequency, calculate the time difference, and then repla
matlab
gui
音频
信号处理
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