Databases Reference
In-Depth Information
Weight (lb)
180
x
x
1
x
160
x
140
120
x
x
x
100
2
x
x
80
60
x
40
4
5
6
7
Height (in)
F I GU R E 10 . 11
Two-level vector quantizer using splitting approach.
Weight (lb)
180
x
x
1
x
160
2
x
140
120
x
x
x
100
x
x
80
60
x
40
4
5
6
7
Height (in)
F I GU R E 10 . 12
Final design using the splitting approach.
The approach used by Hilbert [
138
] to obtain the initial output points of the vector quantizer
was to pick the output points randomly from the training set. This approach guarantees that,
in the initial stages, there will always be at least one vector from the training set in each
quantization region. However, we can still get different codebooks if we use different subsets
of the training set as our initial codebook.
