Explain Sub Band Coding and Wavelet Based Compression - Compression Standard

Explain
(a) Sub Band Coding and
(b) Wavelet Based Compression

Sub Band Coding:

- Sub Band Coding(SBC) is a transform coding.

- A transform code can break a signal that may result in many different ‘frequency bands’.

- Every transform code is encoded independently.

- Most of the time, it is used for compressing audio and video signals.

Wavelet Based Compression:

- It is a process where a well defined temporal support for ‘wiggles’ about X-axis.

- The inner-product of the input signal is multiplied with a set of ortho-normal basis functions.

- Then the coefficients are computed by this inner-product.