Information Technology Reference
In-Depth Information
Reference PEVQ
Encoder
1100111
0011111
1111001
1010111
Decode
UMTS network
Destination PEVQ
1100111
0011111
1111001
1010111
Decoder
Figure 3.17
Video encode and decode process.
on result fitting. We proposed a trinary implicit polynomial to fit the data. As
previously noted, the packet lost rate
x
, frame lost rate
y
, and relative PEVQ
rate
z
has a relation. We suppose using below function ϕ(
x
,
y
,
z
) to describe
x
,
y
,
and z
. β
0
to β
9
is coefficient.
φ
(, ,)
xyz
= + +++ + ++
0
β β β β β β β
x
2
y
2
z
2
xy
xz
yz
x
ββββ
7
yz
++ + .
xyz
1
1
2
3
4
5
6
8
9
To effectively apply curve fitting to identify the optimal design with trinary
implicit polynomial, a major obstacle exists—design optimization. The design
optimization based upon curve fitting is a very complex and challenging
problem due to its complex computation process with an implicit parametric
model and many local minima. In addition, the design analysis or simula-
tion process is usually a demanding and computation intensive process. An
