Chapter: Digital Communication - Sampling & Quantization

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Quantization

The process of transforming Sampled amplitude values of a message signal into a discrete amplitude value is referred to as Quantization.

Quantization:

 

The process of transforming Sampled amplitude values of a message signal into a discrete amplitude value is referred to as Quantization.

 

The quantization Process has a two-fold effect:

 

1. the peak-to-peak range of the input sample values is subdivided into a finite set of decision levels or decision thresholds that are aligned with the risers of the staircase, and

 

2. the output is assigned a discrete value selected from a finite set of representation levels that are aligned with the treads of the staircase.

 

A quantizer is memory less in that the quantizer output is determined only by the value of a corresponding input sample, independently of earlier analog samples applied to the input.


  


Types of Quantizers:

1. Uniform Quantizer

 2. Non- Uniform Quantizer


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