Digital Signal Processing Reference
In-Depth Information
X
2
.
.
.
.
.
Cell C
i
.
.
.
.
.
.
X
1
.
.
.
.
.
.
.
Figure 3.10
Partitioning of a two-dimensional space into 18 cells
where
d
i
[
x
,
y
] is the distortion due to the
i
th
vector in the database given by,
N
1
N
d
i
[
x
,
y
]
=
d
[
x
ik
,y
mk
]
(3.42)
=
k
1
where
M
is the number of vectors in the database and
y
m
is the quantized
version of
x
i
. For transmission purposes, each vector
y
i
is encoded using
a codeword of binary digits of length
B
i
bits. The transmission rate
T
is
given by,
T
=
BF
c
bits/second
(3.43)
where,
M
1
M
B
=
B
i
bits/vector
(3.44)
i
=
1
is the average codeword length (usually
B
B
i
),
B
i
is the number of bits
used to encode vector
y
i
and
F
c
is the number of codewords transmitted per
=
Search WWH ::
Custom Search