Digital Signal Processing Reference
In-Depth Information
Analog input
Sampling
Quantizer
Encoder
ˆ
x(n)
x(n)
Digital Output
ˆ
x
B
(n)
T,
sec
FIGURE 4.1
Pulse code modulation (PCM).
x(t)
t,
sec
T
2
T
1
0
(a)
x(nT)
t,
sec
T
1
0
T
2
(b)
FIGURE 4.2
(a) Continuous-time signal
x
(
t
), (b) uniformly sampled discrete-time signal
x
(
n
)
.
