Howtosignalprocessing
- How are spectrograms created?
- What are the types of spectrogram?
- How to calculate spectrogram in Matlab?
How are spectrograms created?
To generate a spectrogram, a time-domain signal is divided into shorter segments of equal length. Then, the fast Fourier transform (FFT) is applied to each segment. The spectrogram is a plot of the spectrum on each segment.
What are the types of spectrogram?
There are two main types of spectrograms – the discontinuous type, and the continuous type. These two types refer to how the data is acquired, processed and displayed in the spectrogram.
How to calculate spectrogram in Matlab?
s = spectrogram( x ) returns the Short-Time Fourier Transform (STFT) of the input signal x . Each column of s contains an estimate of the short-term, time-localized frequency content of x . The magnitude squared of s is known as the spectrogram time-frequency representation of x [1].
