Quantization - Truncation & Rounding - Errors due to Quantization

Introduction:

          In most of the practical applications, the input signal is always the continuous time signal. It has to be converted into digital values using analog to digital converter

Quantization is the process of digitizing the analog signal to the finite range of values.

The difference between the quantized signal and the unquantized signal is known as quantization error.

Methods of Quantization:

• Truncation
• Rounding

Truncation:

        It is the process of discarding the bits less significant than the LSB which is retained.

Rounding:

        It is the process of choosing the value which is the nearest to the original value.