Discrete Cosine Transform (DCT)

31
⎪
⎪
⎪
⎪
⎪
⎪
⎩
⎪
⎪
⎪
⎪
⎪
⎪
⎨
⎧
=
=
=
=
+
=
−
=
−
=
−
=
−
=
7
7
3
6
4
5
4
1
0
3
3
2
2
1
0
1
5
0
7
6
3
3
3
:
1
b
n
b
n
b
n
temp
n
b
b
n
b
b
n
b
b
n
b
temp
n
b
b
temp
A
⎪
⎪
⎪
⎪
⎪
⎩
⎪
⎪
⎪
⎪
⎪
⎨
⎧
−
=
−
=
−
=
+
=
+
=
=
=
=
0
5
7
6
3
6
2
1
5
6
3
4
2
1
3
4
2
0
1
7
0
:
2
n
n
m
n
n
m
n
n
m
n
n
m
n
n
m
n
m
n
m
n
m
A
⎪
⎪
⎪
⎪
⎪
⎩
⎪
⎪
⎪
⎪
⎪
⎨
⎧
−
=
−
=
+
=
+
=
−
=
−
=
+
=
+
=
0
4
2
3
1
5
7
6
7
6
1
5
2
3
0
4
)
7
(
)
6
(
)
5
(
)
4
(
)
3
(
)
2
(
)
1
(
)
0
(
:
3
m
m
f
m
m
f
m
m
f
m
m
f
m
m
f
m
m
f
m
m
f
m
m
f
A