Discrete Cosine Transform (DCT)

32
In part M, a simplification can be made:
So define
)
(
)
(
)
(
)
(
)
(
6
2
6
6
4
6
6
6
6
6
2
6
6
4
2
6
6
4
2
6
2
4
6
4
6
6
4
6
4
6
6
2
4
6
6
2
4
4
C
C
a
a
a
C
C
a
C
a
C
a
C
a
C
a
C
a
b
C
C
a
a
a
C
C
a
C
a
C
a
C
a
C
a
C
a
b
+
+
+
−
=
+
−
+
−
=
+
−
=
−
−
+
−
=
+
−
−
−
=
+
−
=
4
4
)
(
4
and
6
6
4
4
6
4
6
6
2
6
2
temp
Ra
b
temp
Qa
b
a
a
C
temp
C
C
R
C
C
Q
−
=
−
−
=
+
=
+
=
−
=