Increasing the wordlength, the quantization error can be reduced of 6 dB per additional bit. Quantization error, although very low level, should be considered . The character of the error changes as it becomes correlated with signal. The effects of the quantization error are randomized. Effects of dither Addition of dither minimizes distortion caused by quantization by reducing artifacts to white noise.
Dither enables possibility to encode amplitudes smaller than the least significant bit.