Given
$$H(z) = \frac{z^{-1}-0.8}{1-0.8z^{-1}}\text,$$
does the filter stay an All-Pass filter after quantization of coefficients?
If so, how can I prove it mathematically?
Given
$$H(z) = \frac{z^{-1}-0.8}{1-0.8z^{-1}}\text,$$
does the filter stay an All-Pass filter after quantization of coefficients?
If so, how can I prove it mathematically?
Hint: