1.

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

Answer»

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.

Sub Band Coding:

Wavelet Based Compression:


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