. ( ), , , ( ) , . 9.
. 9. |
(analog signal) - y=x(t) , .. , y1 £y £ y2, t1 £t £ t2. , -¥ +¥. - , .
, .
. 13. |
(discrete signal) . 13 , . () (samples) y(nt), y1 £y £ y2, t - ( , sample time), n = 0, 1, 2,...,N. , : f = 1/t, (sampling frequency). (sampling) , , .
(digital signal) . yn = Qk[y(nt)], Qk - k, , , - . , , (discrete series) - t = const, .
. 14. |
, () , . 14. . , ( ) (noise) (error) (quantization).