A pulse testing method and device, a testing apparatus, and a storage medium are disclosed, the pulse testing method includes: performing a pulse test on an optical fiber by using a plurality of pulses of different pulse widths respectively to obtain test data; and fitting the test data corresponding to the plurality of pulses of different pulse widths.

A pulse testing method and device, a testing apparatus, and a storage medium are disclosed, the pulse testing method includes: performing a pulse test on an optical fiber by using a plurality of pulses of different pulse widths respectively to obtain test data; and fitting the test data corresponding to the plurality of pulses of different pulse widths.

A pulse testing method and device, a testing apparatus, and a storage medium are disclosed, the pulse testing method includes: performing a pulse test on an optical fiber by using a plurality of pulses of different pulse widths respectively to obtain test data; and fitting the test data corresponding to the plurality of pulses of different pulse widths.

The present technology relates to a signal processing apparatus, a signal processing method, and a program that can smoothly switch and reproduce a DSD signal and a PCM signal. A communication unit acquires a PCM signal and a DSD signal. A PCM upsampling unit upsamples the PCM signal to a sampling frequency of the DSD signal. An LPF removes a high-frequency component of the DSD signal. A correlation analysis unit analyzes a correlation between the DSD signal from which a high-frequency component has been removed and the PCM signal after upsampling, and detects a delay amount. A crossfade unit adjusts timing of the DSD signal and the PCM signal after upsampling by using the detected delay amount, and crossfades the DSD signal and the PCM signal after upsampling. The present technology can be applied, for example, to a system that acquires and reproduces audio data, or the like.