A wavelet is a wave-like oscillation with an amplitude that begins at zero, increases or decreases, and then returns to zero one or more times. Wavelets are termed a "brief oscillation". A taxonomy of wavelets has been established, based on the number and direction of its pulses.

Where is wavelet used?

As a mathematical tool, wavelets can be used to extract information from many different kinds of data, including – but not limited to – audio signals and images. Sets of wavelets are generally needed to analyze data fully.

What is wavelet approach?

Wavelet transform is a mathematical approach widely used for signal processing applications. It can decompose special patterns hidden in mass of data. ... Wavelet transforms are mainly divided into two groups [24]: continuous wavelet transform (CWT) and discrete wavelet transform (DWT).