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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
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