Digital Signal Processing Reference
In-Depth Information
Data point
x n
(
- 7
)
x
()
x n
(
- 6
)
x n
(
-1
)
x n
(
- 2
)
x n
(
- 5
)
x n
(
- 4
)
x n
(
- 3
)
FIGURE 9.6
Illustration of circular buffering.
Data flow: a, b, c, d, e, f, g, ...
FIFO
Curre
n
t data
d
Pointer
d
c
Past data
c
c
equivalent to
b
a
b
a
FIFO
Past data
Curre
n
t data
e
d
c
d
c
equivalent to
Data
c
e
b
Pointer
b
FIFO
Current data
f
d
c
e
c
equivalent to
Data
Past data
d
e
f
c
Pointer
FIGURE 9.7
Circular buffer and equivalent FIFO.
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