I
nte
rna
t
io
na
l J
o
urna
l o
f
E
lect
rica
l a
nd
Co
m
p
ute
r
E
ng
in
ee
ring
(
I
J
E
CE
)
Vo
l.
7
,
No
.
6
,
Dec
em
b
er
201
7
,
p
p
.
3
33
2
~
3
3
4
3
I
SS
N:
2
0
8
8
-
8
7
0
8
,
DOI
: 1
0
.
1
1
5
9
1
/i
j
ec
e.
v
7
i6
.
p
p
3
33
2
-
334
3
3332
J
o
ur
n
a
l ho
m
ep
a
g
e
:
h
ttp
:
//ia
e
s
jo
u
r
n
a
l.c
o
m/o
n
lin
e/in
d
ex
.
p
h
p
/I
JE
C
E
Ro
bust Vid
eo
Wa
ter
m
a
r
k
ing
Sc
he
m
e
Ba
sed o
n
Int
r
a
-
C
o
ding
Process
in
M
PEG
-
2
St
y
le
Ra
k
e
s
h Ah
uja
1
, S
.
S
.
B
edi
2
1
De
p
a
rte
m
e
n
t
o
f
Co
m
p
u
ter S
c
ien
c
e
&
En
g
in
e
e
rin
g
,
M
o
ra
d
a
b
a
d
I
n
s
ti
tu
te
o
f
T
e
c
h
n
o
l
o
g
y
,
M
o
ra
d
a
b
a
d
,
In
d
ia
2
De
p
t
o
f
Co
m
p
u
ter S
c
ien
c
e
&
In
f
o
rm
a
ti
o
n
T
e
c
h
n
o
lo
g
y
,
M
JP
R
o
h
i
l
k
h
a
n
d
Un
iv
e
rsity
,
Ba
re
il
l
y
,
In
d
ia
Art
icle
I
nfo
AB
ST
RAC
T
A
r
ticle
his
to
r
y:
R
ec
eiv
ed
No
v
9
,
2
0
1
6
R
ev
i
s
ed
J
an
2
7
,
2
0
1
7
A
cc
ep
ted
Feb
26
,
2
0
1
7
Th
e
p
ro
p
o
se
d
sc
h
e
m
e
i
m
p
le
m
e
n
ted
a
se
m
i
b
li
n
d
d
ig
it
a
l
w
a
term
a
rk
in
g
m
e
th
o
d
f
o
r
v
id
e
o
e
x
p
lo
it
i
n
g
M
P
EG
-
2
sta
n
d
a
rd
.
T
h
e
wa
ter
m
a
rk
i
s
in
se
rted
in
to
se
lec
ted
h
ig
h
f
re
q
u
e
n
c
y
c
o
e
ff
ici
e
n
ts
o
f
p
lain
t
y
p
e
s
o
f
d
isc
re
te
c
o
sin
e
tran
sf
o
r
m
b
lo
c
k
s
in
ste
a
d
o
f
e
d
g
e
a
n
d
tex
tu
re
b
l
o
c
k
s
d
u
ri
n
g
in
t
ra
c
o
d
in
g
pr
o
c
e
ss
.
T
h
e
se
le
c
ti
o
n
is
e
ss
e
n
ti
a
l
b
e
c
a
u
se
th
e
e
rro
r
in
su
c
h
ty
p
e
o
f
b
lo
c
k
s
i
s
les
s
se
n
siti
v
e
to
h
u
m
a
n
e
y
e
s
a
s
c
o
m
p
a
re
d
to
o
th
e
r
c
a
teg
o
ries
o
f
b
lo
c
k
s.
T
h
e
re
f
o
re
,
th
e
p
e
rc
e
p
ti
b
il
it
y
o
f
w
a
ter
m
a
rk
e
d
v
id
e
o
d
o
e
s
n
o
t
d
e
g
ra
d
e
d
sh
a
rp
ly
.
V
isu
a
l
q
u
a
li
ty
is
a
lso
m
a
in
t
a
in
e
d
a
s
m
o
ti
o
n
v
e
c
to
rs
u
se
d
f
o
r
g
e
n
e
ra
ti
n
g
th
e
m
o
ti
o
n
c
o
m
p
e
n
sa
ted
im
a
g
e
s
a
re
u
n
to
u
c
h
e
d
d
u
ri
n
g
th
e
e
n
ti
re
w
a
t
e
r
m
a
r
k
in
g
p
ro
c
e
ss
.
Ex
p
e
rime
n
tal
re
su
lt
s
re
v
e
a
led
th
a
t
th
e
sc
h
e
m
e
is
n
o
t
o
n
ly
ro
b
u
st
t
o
re
-
c
o
m
p
re
ss
io
n
a
tt
a
c
k
,
sp
a
ti
a
l
s
y
n
c
h
ro
n
iza
ti
o
n
a
t
tac
k
s
li
k
e
c
ro
p
p
i
n
g
,
r
o
tatio
n
b
u
t
a
lso
str
o
n
g
to
tem
p
o
ra
l
sy
n
c
h
ro
n
iza
ti
o
n
a
t
tac
k
s
li
k
e
f
ra
m
e
in
se
rti
n
g
,
d
e
letin
g
,
s
w
a
p
p
in
g
a
n
d
a
v
e
ra
g
in
g
.
T
h
e
su
p
e
rio
rit
y
o
f
th
e
a
n
ti
c
ip
a
ted
m
e
th
o
d
is
o
b
tai
n
i
n
g
th
e
b
e
st
stu
r
d
i
n
e
ss
re
su
lt
s
c
o
n
t
ra
st
to
th
e
re
c
e
n
tl
y
d
e
li
v
e
re
d
sc
h
e
m
e
s.
K
ey
w
o
r
d
:
C
o
p
y
r
ig
h
t
p
r
o
tectio
n
DC
T
b
lo
ck
s
I
n
f
o
r
m
a
tio
n
s
ec
u
r
it
y
MP
E
G
-
2
s
tr
u
ct
u
r
e
Vid
eo
w
ater
m
ar
k
i
n
g
Co
p
y
rig
h
t
©
2
0
1
7
In
stit
u
te o
f
A
d
v
a
n
c
e
d
E
n
g
i
n
e
e
rin
g
a
n
d
S
c
ien
c
e
.
Al
l
rig
h
ts
re
se
rv
e
d
.
C
o
r
r
e
s
p
o
nd
ing
A
uth
o
r
:
R
ak
e
s
h
Ah
u
j
a,
Dep
ar
te
m
en
t
o
f
C
o
m
p
u
ter
Sci
en
ce
&
E
n
g
in
ee
r
i
n
g
,
Mo
r
ad
ab
ad
I
n
s
titu
te
o
f
T
ec
h
n
o
ilo
g
y
,
R
a
m
Ga
n
g
a
Vi
h
ar
,
P
h
ase
2
,
Mo
r
ad
ab
a
d
,
Uttar
P
r
ad
esh
,
I
n
d
ia.
E
m
ail: a
h
u
j
a2
3
0
5
@
g
m
a
il.c
o
m
1.
I
NT
RO
D
UCT
I
O
N
T
h
e
r
ap
id
d
ev
elo
p
m
en
t
o
f
f
ast
in
ter
n
et
b
a
n
d
w
id
th
,
e
x
ce
llen
ce
s
r
ec
o
r
d
in
g
d
ev
ice
s
,
tr
e
m
en
d
o
u
s
s
to
r
ag
e
ca
p
ac
it
y
,
b
etter
n
o
is
e
r
esis
tan
ce
a
n
d
q
u
alit
y
o
f
s
er
v
ices
(
Qo
S)
h
a
v
e
m
ad
e
p
o
s
s
i
b
le
to
g
en
er
ate
th
e
m
u
ltip
le
co
p
ies
o
f
t
h
e
d
i
g
ital
m
u
lti
m
ed
ia
co
n
te
n
t
lik
e
i
m
ag
e
,
au
d
io
an
d
v
id
eo
f
o
r
d
is
tr
ib
u
t
in
g
to
o
th
er
u
s
er
o
r
co
m
p
u
ter
s
y
s
te
m
w
it
h
n
o
q
u
a
lit
y
d
eg
r
ad
atio
n
as
t
h
e
o
r
ig
i
n
a
l
an
d
co
p
ied
d
ata
ar
e
ex
ac
tly
s
a
m
e,
i
n
ex
p
e
n
s
i
v
e
an
d
d
eliv
er
y
to
th
e
r
e
m
o
te
w
o
r
k
s
tatio
n
is
al
m
o
s
t
in
s
ta
n
ta
n
eo
u
s
.
T
h
er
ef
o
r
e,
an
is
s
u
e
o
f
in
t
ellec
tu
al
co
p
y
r
i
g
h
t
p
r
o
tectio
n
b
ec
o
m
e
s
a
m
aj
o
r
co
n
ce
r
n
.
T
h
e
tec
h
n
o
lo
g
y
o
f
cr
y
p
to
g
r
ap
h
y
s
o
lv
e
s
t
h
e
p
r
o
b
le
m
u
p
to
s
o
m
e
ex
ten
t.
Ho
w
e
v
er
,
t
h
e
tech
n
o
lo
g
y
v
u
ln
er
ab
le
o
n
ce
th
e
co
n
te
n
ts
ar
e
d
ec
r
y
p
ted
s
i
n
ce
a
p
ir
ate
co
u
ld
ea
s
il
y
p
u
r
ch
a
s
e
a
co
p
y
an
d
th
e
n
r
e
-
s
el
l
o
r
d
is
tr
i
b
u
te
it
o
v
er
a
s
h
ar
ed
n
et
w
o
r
k
.
T
h
e
ad
v
en
t
o
f
d
ig
ital
w
ater
m
ar
k
i
n
g
tech
n
o
lo
g
y
co
n
q
u
er
s
t
h
e
r
estrictio
n
i
n
p
r
esen
ce
o
f
s
o
m
e
ex
i
s
ti
n
g
th
r
e
ad
s
.
Dig
ital
w
ater
m
ar
k
i
n
g
[
1
]
is
th
e
p
r
o
ce
s
s
o
f
in
s
er
ti
n
g
t
h
e
s
p
ec
ial
b
it
p
atter
n
as
d
i
g
ital
w
ater
m
ar
k
i
n
to
t
h
e
m
u
lti
m
ed
ia
d
o
cu
m
en
t
i
n
s
u
c
h
t
h
at
t
h
e
q
u
al
it
y
o
f
v
id
eo
m
u
s
t
n
o
t
b
e
d
eg
r
ad
ed
f
r
o
m
t
h
e
m
i
n
i
m
u
m
t
h
r
es
h
o
ld
an
d
it
m
u
s
t
w
it
h
s
ta
n
d
n
o
r
m
al
p
r
o
ce
s
s
in
g
o
f
v
id
eo
ed
itin
g
o
p
er
atio
n
.
T
h
e
w
ater
m
ar
k
m
a
y
b
e
t
h
e
co
p
y
r
ig
h
t
l
o
g
o
,
o
w
n
er
,
d
is
tr
ib
u
to
r
o
r
cu
s
to
m
er
i
n
f
o
r
m
atio
n
,
d
ep
en
d
s
u
p
o
n
th
e
ap
p
licatio
n
f
o
r
w
h
ic
h
it is
to
b
e
d
ev
elo
p
ed
.
An
ex
h
a
u
s
ti
v
e
r
esear
ch
h
as
alr
ea
d
y
b
ee
n
tak
e
p
lace
f
o
r
i
m
a
g
e
w
a
ter
m
ar
k
in
g
.
T
h
e
i
m
a
g
e
w
ater
m
ar
k
i
n
g
tech
n
iq
u
es
[
2
]
-
[
3
]
ar
e
ap
p
lied
to
v
id
eo
m
u
lti
m
ed
ia
o
b
j
ec
ts
to
o
.
Ho
w
e
v
er
,
th
ese
s
c
h
e
m
e
s
al
w
a
y
s
s
u
f
f
er
b
ec
au
s
e
v
id
eo
co
n
s
is
tin
g
ad
d
itio
n
al
f
ea
t
u
r
es
t
h
at
d
o
n
o
t
p
r
ese
n
t
i
n
t
h
e
i
m
a
g
e.
T
h
e
d
is
tin
g
u
is
h
ab
le
f
ea
t
u
r
e
o
f
v
id
e
o
is
th
e
p
r
esen
ce
o
f
te
m
p
o
r
al
r
ed
u
n
d
an
cie
s
ex
i
s
ts
b
et
w
ee
n
n
eig
h
b
o
r
in
g
f
r
a
m
es
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
E
C
E
I
SS
N:
2
0
8
8
-
8708
R
o
b
u
s
t V
id
eo
W
a
terma
r
kin
g
S
ch
eme
B
a
s
ed
o
n
I
n
tr
a
C
o
d
in
g
P
r
o
ce
s
s
in
MPE
G
-
2
S
tyle
(
R
a
ke
s
h
A
h
u
ja
)
3333
u
n
l
ik
e
i
m
a
g
e.
T
h
e
r
o
b
u
s
t
a
n
d
i
m
p
er
ce
p
tib
le
v
id
eo
w
a
t
er
m
ar
k
i
n
g
is
p
er
p
etu
i
t
y
d
i
f
f
er
in
g
f
r
o
m
i
m
ag
e
w
ater
m
ar
k
i
n
g
.
A
cc
u
s
to
m
ed
v
i
d
eo
w
ater
m
ar
k
i
n
g
m
e
th
o
d
[
4
]
s
u
g
g
ested
d
ec
o
m
p
r
es
s
in
g
t
h
e
v
id
eo
s
tr
ea
m
i
n
to
t
y
p
ical
v
id
eo
,
in
s
er
t
th
e
w
ater
m
ar
k
a
n
d
en
co
d
e
th
e
w
ater
m
a
r
k
ed
v
id
eo
.
T
h
is
p
r
o
ce
d
u
r
e
r
eq
u
ir
es
a
en
o
r
m
o
u
s
p
r
o
ce
s
s
in
g
ti
m
e
to
d
ec
o
m
p
r
es
s
,
e
m
b
ed
a
n
d
r
ec
o
m
p
r
ess
t
h
e
v
id
eo
o
b
j
ec
ts
.
I
n
o
r
d
er
to
m
a
k
e
th
e
s
y
s
te
m
f
aster
an
d
m
o
r
e
p
r
ac
tical,
it
is
s
u
g
g
e
s
ted
to
em
b
ed
th
e
co
p
y
r
i
g
h
t
i
n
f
o
r
m
atio
n
d
u
r
i
n
g
t
h
e
co
m
p
r
ess
io
n
.
T
h
e
p
r
ac
tical
b
en
ef
it
a
s
s
o
ciate
d
w
i
th
t
h
i
s
s
ch
e
m
e
i
s
th
a
t
it
s
u
p
p
o
r
ts
r
ea
l
ti
m
e
v
id
eo
w
ater
m
ar
k
i
n
g
ap
p
licatio
n
s
w
h
er
e
e
m
b
ed
d
in
g
p
r
o
ce
s
s
r
u
n
s
p
ar
all
el
w
it
h
co
m
p
r
es
s
io
n
,
f
o
r
ex
a
m
p
le,
v
id
eo
o
n
d
em
a
n
d
.
Z
h
o
Z
h
o
n
g
j
ie
et
al.
[
5
]
p
r
o
p
o
s
ed
th
e
v
id
eo
w
a
ter
m
ar
k
in
g
s
c
h
e
m
e
b
ased
o
n
m
o
tio
n
v
e
cto
r
s
.
T
h
e
tech
n
iq
u
e
u
t
ilized
th
e
P
-
f
r
a
m
e
s
an
d
B
-
f
r
a
m
es
f
o
r
e
m
b
ed
d
in
g
p
u
r
p
o
s
e.
T
h
e
w
ater
m
ar
k
ca
p
ac
it
y
is
d
i
f
f
er
e
n
t
in
ea
ch
f
r
a
m
e.
T
h
e
d
ile
m
m
a
a
s
s
o
ciate
d
in
th
is
p
r
o
ce
s
s
i
s
th
e
l
ess
p
a
y
lo
ad
ca
p
ac
it
y
o
f
w
ater
m
ar
k
i
n
f
o
r
m
atio
n
i
s
allo
w
ed
b
ec
au
s
e
s
u
ch
f
r
a
m
es
ar
e
h
ig
h
l
y
co
m
p
r
es
s
ed
b
y
m
o
tio
n
co
m
p
e
n
s
a
tio
n
p
r
o
ce
d
u
r
e.
T
h
e
o
th
er
is
s
u
e
r
elate
d
w
ith
t
h
is
s
c
h
e
m
e
i
s
t
h
e
i
n
cr
ea
s
e
in
b
it
r
ate
o
f
m
a
cr
o
b
lo
ck
s
t
h
at
w
er
e
w
ater
m
ar
k
ed
.
Fu
r
t
h
er
,
t
h
e
s
ch
e
m
e
i
s
n
o
t
r
o
b
u
s
t
ag
a
in
s
t
f
r
a
m
e
a
v
er
ag
i
n
g
a
n
d
f
r
a
m
e
d
r
o
p
p
in
g
attac
k
.
An
o
t
h
er
co
m
p
r
e
s
s
ed
d
o
m
ai
n
b
ased
v
id
eo
w
ater
m
ar
k
i
n
g
s
ch
e
m
e
i
s
d
escr
ib
ed
b
y
Yo
s
h
ito
Uen
o
[
6
]
.
I
n
th
is
tech
n
iq
u
e,
t
h
e
co
m
p
o
s
itio
n
o
f
MP
E
G
en
co
d
er
[
7
]
is
p
ar
tially
m
o
d
i
f
y
in
g
to
e
m
b
ed
th
e
w
ater
m
ar
k
in
f
o
r
m
atio
n
.
T
w
o
m
et
h
o
d
o
lo
g
ies
B
in
a
r
y
Tr
ee
an
d
C
h
a
in
C
o
d
e
ar
e
ad
o
p
ted
in
th
is
s
c
h
e
m
e.
B
o
th
tech
n
iq
u
e
s
u
tili
ze
d
th
e
b
in
ar
y
w
ater
m
ar
k
as
co
p
y
r
i
g
h
t
f
o
r
e
m
b
ed
d
in
g
p
u
r
p
o
s
e.
A
t
w
o
d
i
m
en
s
io
n
a
l
w
ater
m
ar
k
is
co
n
v
er
ted
in
to
o
n
e
d
i
m
e
n
s
io
n
al
ar
r
a
y
u
s
ed
to
p
ic
k
o
n
e
b
it
at
a
ti
m
e.
I
n
b
in
ar
y
tr
ee
alg
o
r
ith
m
,
i
f
t
h
e
p
ick
ed
w
ate
r
m
ar
k
b
it
is
1
t
h
e
n
t
h
e
m
ac
r
o
b
lo
ck
o
f
I
-
f
r
a
m
e
r
ef
er
r
ed
to
m
o
tio
n
v
ec
to
r
o
f
P
-
f
r
a
m
e
is
ch
a
n
g
ed
to
e
v
en
o
th
e
r
w
i
s
e
o
d
d
.
I
n
c
h
ain
co
d
e
m
e
th
o
d
,
m
ac
r
o
b
lo
ck
o
f
I
-
f
r
a
m
e
i
s
p
ar
titi
o
n
ed
in
to
8
s
ec
tio
n
s
o
n
t
h
e
o
r
i
g
in
o
f
th
e
r
o
u
te
o
f
m
o
tio
n
v
ec
to
r
s
o
f
P
-
f
r
a
m
e
a
n
d
e
m
b
ed
t
h
e
th
r
ee
w
ater
m
ar
k
b
its
in
to
o
n
e
o
f
th
e
8
p
ar
ts
o
f
m
ac
r
o
b
lo
ck
o
f
I
f
r
a
m
e
b
y
u
s
i
n
g
o
ct
al
ch
ai
n
m
eth
o
d
.
A
s
atis
f
ac
to
r
y
p
er
ce
p
tib
ilit
y
i
s
o
b
tain
ed
h
o
w
e
v
er
,
th
e
s
c
h
e
m
e
lo
s
t
t
h
e
w
ater
m
ar
k
b
it
s
ab
o
u
t
2
0
%
w
h
ile
ex
tr
ac
ti
n
g
.
R
o
b
u
s
tn
e
s
s
is
ce
r
t
ain
l
y
a
f
f
ec
ted
s
h
ar
p
l
y
w
h
e
n
a
n
y
f
u
r
t
h
er
v
id
eo
ed
itin
g
o
p
er
atio
n
s
w
er
e
ap
p
lied
o
n
w
ater
m
ar
k
ed
v
id
eo
.
MP
E
G
-
2
b
ased
d
ig
ital
v
id
eo
w
ater
m
ar
k
i
n
g
s
ch
e
m
e
i
s
d
escr
ib
ed
b
y
Y
u
k
Yin
g
C
h
u
n
g
[
8
]
to
o
.
T
h
e
s
ch
e
m
e
e
m
b
ed
s
a
w
ater
m
ar
k
in
to
t
h
e
q
u
a
n
tized
DC
T
co
ef
f
icie
n
t
g
en
er
ated
f
r
o
m
I
-
f
r
a
m
e
s
d
u
r
i
n
g
th
e
e
n
co
d
in
g
p
r
o
ce
s
s
.
On
e
wate
r
m
ar
k
b
it
is
e
m
b
ed
d
ed
in
t
o
th
e
L
SB
o
f
ea
c
h
D
C
T
co
ef
f
icien
t
b
lo
ck
o
f
I
-
f
r
a
m
e
s
.
W
ater
m
ar
k
in
g
s
ch
e
m
e
is
co
m
b
i
n
ed
w
it
h
t
h
r
ee
er
r
o
r
co
r
r
ec
tin
g
co
d
es:
B
C
H
(
3
1
,
8
)
,
T
u
r
b
o
(
3
,
1
)
an
d
C
o
n
v
(
2
,
1
,
3
)
an
d
f
o
u
n
d
B
C
H
(
3
1
,
8
)
ac
h
iev
ed
h
ig
h
er
er
r
o
r
co
r
r
ec
tin
g
ca
p
ac
it
y
t
h
an
T
u
r
b
o
(
3
,
1
)
an
d
C
o
n
v
(
2
,
1
,
3
)
.
Sev
en
ca
s
es
o
f
n
o
i
s
e
w
er
e
s
i
m
u
la
ted
an
d
te
s
ted
.
T
h
e
m
aj
o
r
d
r
aw
b
ac
k
as
s
o
ciate
d
w
it
h
th
i
s
ap
p
r
o
ac
h
th
at
t
h
e
w
ater
m
ar
k
is
d
i
s
to
r
ted
o
r
ev
en
eli
m
i
n
ated
b
y
r
a
n
d
o
m
izi
n
g
t
h
e
L
SB
o
f
all
D
C
T
b
lo
ck
s
.
An
o
th
er
li
m
ita
tio
n
o
f
t
h
is
ap
p
r
o
ac
h
is
t
h
at
p
er
ce
p
tib
ilit
y
a
n
d
r
o
b
u
s
t
n
ess
w
it
h
r
esp
ec
t
to
f
r
a
m
e
ed
iti
n
g
o
p
er
atio
n
s
w
er
e
n
o
t
test
ed
.
Min
g
J
ia
n
g
et
al.
[
9
]
d
escr
ib
ed
th
e
v
id
eo
w
ater
m
ar
k
i
n
g
s
c
h
e
m
e
b
ased
o
n
M
P
E
G
-
2
s
tr
u
ct
u
r
e
f
o
r
p
r
o
tectin
g
t
h
e
co
p
y
r
i
g
h
t
o
f
t
h
e
c
o
n
ce
r
n
m
u
lti
m
ed
ia
o
b
j
ec
ts
.
T
h
e
s
c
h
e
m
e
ad
o
p
ted
th
e
s
i
m
p
le
ap
p
r
o
ac
h
to
in
s
er
t
t
h
e
b
in
ar
y
w
ater
m
ar
k
in
to
th
e
h
o
s
t
s
ig
n
al.
I
n
t
h
i
s
tech
n
iq
u
e,
I
-
f
r
a
m
es
ar
e
u
s
ed
to
g
en
er
ate
th
e
q
u
a
n
tize
d
DC
T
b
lo
ck
s
.
T
h
e
e
m
b
ed
d
in
g
al
g
o
r
ith
m
s
tar
ted
to
p
ick
o
n
e
w
ater
m
ar
k
b
it
an
d
o
n
e
8
x
8
DC
T
b
lo
ck
s
i
m
u
lta
n
eo
u
s
l
y
a
n
d
in
s
er
tio
n
i
s
b
ased
o
n
te
s
ti
n
g
th
e
DC
v
al
u
e
f
o
r
o
d
d
o
r
ev
en
.
I
f
th
e
w
ater
m
ar
k
b
it
is
o
d
d
an
d
th
e
co
r
r
esp
o
n
d
in
g
DC
co
e
f
f
ic
ien
t
i
s
al
s
o
o
d
d
th
e
n
n
o
n
ee
d
to
ch
a
n
g
e
th
e
D
C
co
ef
f
icie
n
t
o
th
er
w
is
e
m
a
k
e
t
h
e
DC
co
ef
f
icie
n
t
to
e
v
en
.
T
w
o
m
aj
o
r
d
r
aw
b
ac
k
s
ar
e
as
s
o
ci
ated
w
it
h
t
h
ese
s
c
h
e
m
e
s
.
Mi
n
o
r
u
p
d
atin
g
t
h
ese
co
ef
f
icie
n
t
s
d
eg
r
ad
es
t
h
e
q
u
al
it
y
o
f
w
ater
m
ar
k
ed
v
id
eo
s
h
a
r
p
ly
a
s
D
C
co
ef
f
icie
n
t
o
f
D
C
T
b
lo
ck
s
r
ep
r
esen
t
th
e
av
er
a
g
e
in
f
o
r
m
atio
n
o
f
th
e
v
id
eo
f
r
a
m
e
d
ir
ec
tl
y
af
f
ec
t
t
h
e
HVS
s
in
ce
t
h
ese
r
eg
io
n
s
ar
e
h
ig
h
l
y
s
en
s
iti
v
e
to
th
e
HVS
an
d
s
ec
o
n
d
r
ea
s
o
n
is
th
at
w
a
ter
m
ar
k
in
g
m
et
h
o
d
u
tili
zin
g
s
u
ch
co
ef
f
icie
n
t
s
ar
e
r
esp
o
n
s
ib
le
f
o
r
in
cr
ea
s
e
i
n
b
it
r
ate.
T
h
e
ab
o
v
e
m
en
tio
n
ed
tech
n
iq
u
es
i
n
s
er
t
ed
th
e
w
a
ter
m
ar
k
o
b
j
ec
t
b
y
ex
p
lo
r
in
g
t
h
e
e
n
tire
DC
T
b
lo
ck
s
f
r
o
m
e
n
tire
or
s
el
ec
ted
I
-
f
r
a
m
es
r
es
u
lt
s
th
e
d
e
g
r
ad
atio
n
o
f
q
u
alit
y
o
f
w
ater
m
ar
k
ed
v
id
eo
an
d
n
o
m
ea
n
s
o
f
s
a
tis
f
ac
to
r
y
le
v
el
o
f
r
o
b
u
s
tn
es
s
o
b
tain
a
g
ain
s
t te
m
p
o
r
al
s
y
n
c
h
r
o
n
izatio
n
at
tack
s
.
T
h
e
p
r
o
p
o
s
ed
d
ig
ital
v
id
eo
w
ater
m
ar
k
i
n
g
s
c
h
e
m
e
f
o
cu
s
e
d
o
n
th
e
s
e
li
m
itat
io
n
s
b
y
e
x
p
lo
itin
g
th
e
f
ea
t
u
r
es
o
f
8
x
8
DC
T
b
lo
ck
s
d
u
r
in
g
i
n
tr
a
-
e
n
co
d
in
g
p
r
o
ce
s
s
co
n
s
id
er
i
n
g
I
-
f
r
a
m
es
i
n
MP
E
G
-
2
s
t
y
le
.
T
h
is
s
ch
e
m
e
cla
s
s
i
f
y
in
g
t
h
e
D
C
T
b
lo
ck
s
in
th
r
ee
ca
te
g
o
r
ies:
ed
g
e,
tex
tu
r
e
a
n
d
p
lain
b
lo
ck
.
W
ater
m
ar
k
o
b
j
ec
t
is
e
m
b
ed
d
ed
in
to
th
e
q
u
an
tized
p
lain
t
y
p
e
o
f
DC
T
b
lo
ck
s
.
T
h
e
s
elec
tio
n
i
s
n
ec
es
s
ar
y
to
av
o
id
d
eg
r
ad
in
g
th
e
p
er
ce
p
tib
ilit
y
o
f
w
ater
m
ar
k
ed
v
id
eo
f
r
o
m
t
h
e
m
i
n
i
m
u
m
t
h
r
es
h
o
ld
as
th
e
s
e
b
lo
ck
s
ar
e
less
s
en
s
it
iv
e
to
HV
S
as
co
m
p
ar
ed
to
o
th
er
t
y
p
es
o
f
b
l
o
ck
s
.
T
h
e
p
er
ce
p
tib
ilit
y
is
f
u
r
t
h
er
i
m
p
r
o
v
ed
b
y
e
m
p
l
o
y
in
g
s
i
n
g
le
AC
co
ef
f
icie
n
t
f
r
o
m
a
p
ar
ticu
lar
p
lain
D
C
T
b
lo
ck
.
An
o
th
er
r
ea
s
o
n
f
o
r
s
e
lectin
g
p
ar
tic
u
lar
t
y
p
e
o
f
b
lo
ck
s
is
to
co
n
tr
o
l
th
e
in
cr
ea
s
e
i
n
b
it r
ate
o
f
r
esu
lta
n
t
w
ater
m
ar
k
ed
v
id
eo
to
o
.
T
h
e
r
est
o
f
th
e
p
ap
e
r
is
o
r
g
an
ized
in
th
e
f
o
llo
w
in
g
s
ec
tio
n
s
.
Sectio
n
2
d
escr
ib
ed
a
c
o
n
cise
o
v
er
v
ie
w
o
f
MP
E
G
-
2
v
id
eo
co
m
p
r
ess
io
n
s
ta
n
d
ar
d
alo
n
g
w
i
th
k
e
y
asp
ec
t o
f
s
u
g
g
es
ted
v
id
eo
w
ater
m
ar
k
in
g
p
r
o
ce
s
s
.
T
h
e
p
r
o
p
o
s
ed
v
id
eo
w
a
ter
m
ar
k
in
g
s
ch
e
m
e
is
i
llu
s
tr
ated
i
n
Sect
i
o
n
3
.
T
h
e
s
i
m
u
la
tio
n
r
e
s
u
l
ts
f
o
r
r
o
b
u
s
tn
e
s
s
an
d
p
er
ce
p
tib
ilit
y
i
s
s
u
es
ar
e
elab
o
r
ate
in
Sectio
n
4
.
Sectio
n
5
co
n
tr
ast
s
th
e
r
esu
lts
o
f
p
r
o
p
o
s
ed
s
ch
e
m
e
w
i
th
t
h
o
s
e
tech
n
iq
u
es p
u
b
lis
h
ed
in
r
ec
en
t
y
ea
r
s
.
Sectio
n
6
co
n
cl
u
d
es t
h
e
w
o
r
k
i
n
th
is
p
ap
er
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
J
E
C
E
Vo
l.
7
,
No
.
6
,
Dec
em
b
er
2
0
1
7
:
3
3
3
2
–
3
3
4
3
3334
2.
M
P
E
G
-
2
ST
RUCT
URE
T
h
e
tar
g
et
o
f
d
ev
elo
p
m
en
t
o
f
MP
E
G
-
2
alg
o
r
ith
m
to
o
ls
i
s
to
ac
h
ie
v
e
h
i
g
h
co
m
p
r
es
s
io
n
r
at
io
b
o
th
in
s
p
atial
an
d
te
m
p
o
r
al
d
o
m
ai
n
f
o
r
v
id
eo
m
u
lti
m
ed
ia
o
b
j
ec
ts
.
As
s
h
o
w
n
i
n
F
ig
u
r
e
1
,
th
e
s
tr
u
ctu
r
e
p
er
m
its
to
s
eg
m
e
n
t
t
h
e
v
id
eo
in
to
th
e
n
u
m
b
er
o
f
f
r
a
m
es.
T
h
r
ee
f
r
a
m
e
s
ar
e
ca
teg
o
r
ized
as
I
n
tr
a
-
p
ict
u
r
e
f
r
a
m
es
t
y
p
icall
y
ca
lled
I
-
f
r
a
m
es,
f
o
r
w
ar
d
-
p
r
ed
icted
f
r
a
m
es id
e
n
ti
f
ied
as P
-
f
r
am
es a
n
d
b
id
ir
ec
tio
n
al
f
r
a
m
es
n
a
m
ed
as B
-
f
r
a
m
es.
A
t
y
p
ical
MP
E
G
-
2
co
d
in
g
s
t
an
d
ar
d
[
10
]
cr
ea
tes
a
g
r
o
u
p
o
f
s
eq
u
e
n
ce
o
f
p
ictu
r
e
s
ter
m
e
d
as
GOP
.
T
h
e
s
tr
u
ct
u
r
e
o
f
GOP
co
n
s
is
t
i
n
g
o
n
e
I
-
f
r
a
m
e
f
o
llo
w
ed
b
y
a
ch
ain
o
f
P
-
f
r
a
m
e
an
d
B
-
f
r
a
m
e
s
.
T
h
e
d
is
p
la
y
o
r
d
er
an
d
p
r
o
ce
s
s
in
g
o
r
d
er
is
d
if
f
er
en
t
as
s
h
o
w
n
in
Fi
g
u
r
e
2
an
d
Fig
u
r
e
3
r
esp
ec
tiv
el
y
p
r
o
p
o
s
e
d
b
y
[
1
0
]
.
M
P
E
G
-
2
d
o
es
n
o
t
ad
am
a
n
t
ab
o
u
t
th
e
s
ize
o
f
GOP
.
T
h
e
f
lex
ib
ilit
y
i
s
b
en
e
f
icial
f
o
r
co
m
p
r
ess
i
o
n
an
d
w
ater
m
ar
k
tech
n
o
lo
g
y
b
o
th
.
I
-
f
r
a
m
es
ar
e
en
co
d
ed
to
r
ed
u
ce
t
h
e
s
p
atial
r
ed
u
n
d
a
n
c
y
th
er
e
f
o
r
e
n
o
r
e
f
er
en
ce
f
r
o
m
o
t
h
er
f
r
a
m
e
s
is
r
eq
u
ir
ed
.
P
-
f
r
a
m
e
s
a
n
d
B
-
f
r
a
m
es
ar
e
u
s
ed
to
m
i
n
i
m
ize
t
h
e
s
p
atial
an
d
te
m
p
o
r
al
r
ed
u
n
d
an
c
y
b
o
t
h
.
P
-
f
r
a
m
e
s
is
u
s
e
to
p
r
ed
ict
f
r
o
m
th
e
p
r
ev
io
u
s
I
-
f
r
a
m
es
o
r
P
-
f
r
a
m
es.
T
h
e
b
lo
ck
s
ass
o
ciate
d
w
it
h
P
-
f
r
a
m
es
ar
e
co
m
p
ar
ab
le
to
th
e
s
et
o
f
b
lo
ck
o
f
s
a
m
e
s
ize
in
th
e
p
r
ev
io
u
s
I
-
f
r
a
m
es
o
r
P
-
f
r
a
m
e
s
.
T
h
e
b
est
m
atc
h
i
n
g
b
lo
ck
in
th
e
r
ef
er
e
n
ce
f
r
a
m
e
is
u
s
ed
to
p
r
ed
ict
f
o
r
th
e
latter
.
B
-
f
r
a
m
es
e
m
p
lo
y
s
t
w
o
r
ef
er
en
ce
s
f
r
a
m
es
a
n
d
th
e
s
e
t
w
o
t
y
p
es
m
a
y
b
e
th
e
co
m
b
i
n
atio
n
o
f
I
-
f
r
a
m
es
an
d
P
-
f
r
a
m
es
o
r
b
o
th
P
-
f
r
a
m
es.
I
n
a
clas
s
ical
s
eq
u
en
ce
,
e
n
co
d
ed
I
-
f
r
a
m
e
is
t
h
r
ee
ti
m
es
lar
g
er
th
an
a
co
d
ed
P
-
f
r
a
m
e,
w
h
ic
h
is
t
w
o
ti
m
e
s
lar
g
er
t
h
a
n
I
-
f
r
a
m
es.
T
h
u
s
t
h
e
h
ig
h
es
t
co
m
p
r
es
s
io
n
i
s
p
r
o
v
id
ed
b
y
B
-
f
r
a
m
es.
T
h
er
e
ar
e
n
u
m
er
o
u
s
k
e
y
tec
h
n
o
lo
g
ies
u
s
ed
in
MP
E
G
-
2
s
tr
u
ct
u
r
e
s
u
ch
as
DC
T
,
q
u
an
tizatio
n
,
m
o
tio
n
esti
m
atio
n
an
d
m
o
tio
n
co
m
p
e
n
s
atio
n
a
n
d
VL
C
co
d
in
g
.
T
h
ese
ar
e
b
r
o
ad
ly
class
i
f
y
in
g
i
n
to
th
r
ee
m
aj
o
r
p
ar
ts
:
in
tr
a
-
co
d
in
g
p
r
o
ce
s
s
,
in
ter
-
co
d
in
g
p
r
o
ce
s
s
an
d
e
n
co
d
ed
b
it
s
tr
ea
m
.
P
r
ev
i
o
u
s
s
u
g
g
ested
w
o
r
k
ex
p
lo
its
o
n
e
o
f
th
ese
ar
ea
s
t
o
im
p
le
m
e
n
t
th
e
v
id
eo
w
at
er
m
ar
k
i
n
g
s
ch
e
m
e.
W
ater
m
ar
k
i
n
g
t
h
r
o
u
g
h
in
ter
-
co
d
in
g
p
h
ase
is
b
a
s
ed
o
n
in
t
ellig
e
n
tl
y
u
tili
z
in
g
th
e
m
o
tio
n
v
ec
to
r
s
u
s
ed
f
o
r
g
en
er
ati
n
g
th
e
m
o
tio
n
co
m
p
en
s
ated
i
m
ag
e
i
n
all
ian
ce
o
f
P
-
f
r
a
m
e
s
an
d
B
-
f
r
a
m
es.
T
h
er
e
ar
e
t
w
o
m
aj
o
r
p
r
o
b
lem
s
ass
o
ciate
d
w
h
ile
e
m
b
ed
d
i
n
g
t
h
e
w
a
ter
m
ar
k
in
s
u
c
h
f
r
a
m
es.
First
is
s
u
e
is
t
h
e
h
o
ld
in
g
o
f
less
ca
p
ac
it
y
o
f
w
ater
m
ar
k
o
b
j
ec
ts
as
th
e
y
ar
e
h
ig
h
l
y
co
m
p
r
ess
ed
b
y
m
o
tio
n
e
s
ti
m
atio
n
b
ased
tech
n
iq
u
e
.
Seco
n
d
l
y
,
th
e
b
it
-
r
ate
o
f
r
es
u
lt
an
t
w
a
ter
m
ar
k
ed
v
id
eo
i
n
cr
ea
s
es
b
y
e
x
p
lo
iti
n
g
t
h
ese
s
u
c
h
f
r
a
m
es
.
T
h
e
p
r
i
m
ar
y
ad
v
an
ta
g
e
o
f
en
co
d
ed
b
it
s
tr
ea
m
b
a
s
ed
v
id
eo
w
ater
m
ar
k
i
n
g
i
s
th
at
n
o
en
co
d
in
g
an
d
d
ec
o
d
in
g
r
eq
u
ir
ed
d
u
r
in
g
th
e
i
n
s
er
tio
n
a
n
d
r
etr
iev
al
p
r
o
ce
s
s
r
esp
ec
ti
v
el
y
.
Yet,
a
l
i
m
it
ed
in
f
o
r
m
atio
n
as
w
ater
m
ar
k
is
allo
w
ed
to
i
n
s
er
t
th
e
w
ater
m
ar
k
o
b
j
ec
t in
to
th
e
h
o
s
t.
A
n
o
t
h
er
co
n
s
tr
ai
n
t i
s
th
e
in
cr
ea
s
e
i
n
co
m
p
u
ta
tio
n
al
co
m
p
lex
it
y
.
Desig
in
g
th
e
w
ater
m
ar
k
i
n
g
s
y
s
te
m
t
h
r
o
u
g
h
i
n
tr
a
-
co
d
in
g
p
r
o
ce
s
s
is
p
r
o
m
is
i
n
g
to
u
ti
lize
th
e
DC
T
an
d
q
u
a
n
tizat
io
n
p
r
o
ce
s
s
p
r
o
ce
s
s
ed
th
r
o
u
g
h
I
-
f
r
a
m
es.
Q
u
an
tize
d
8
x
8
DC
T
b
lo
ck
co
n
tain
s
o
n
e
DC
an
d
6
3
A
C
co
ef
f
icie
n
t
s
.
DC
co
ef
f
icie
n
t
b
ased
w
a
ter
m
ar
k
in
g
s
y
s
te
m
s
u
f
f
er
s
f
r
o
m
d
eg
r
ad
in
g
t
h
e
v
i
s
u
al
q
u
a
lit
y
o
f
w
ater
m
ar
k
ed
v
id
eo
as
th
e
av
er
ag
e
i
n
f
o
r
m
atio
n
is
co
n
ce
n
tr
ated
in
t
h
i
s
co
ef
f
icie
n
t.
AC
c
o
ef
f
icie
n
t
s
ar
e
r
ic
h
s
o
u
r
ce
o
f
h
i
g
h
f
r
eq
u
en
c
ies
i.e
.
co
n
tain
s
a
v
er
y
s
m
al
l
v
al
u
e.
C
o
n
s
id
er
in
g
en
t
ir
e
AC
co
ef
f
i
cien
ts
d
eg
r
ad
e
th
e
p
er
ce
p
tib
ilit
y
s
i
g
n
i
f
ica
n
tl
y
t
h
er
ef
o
r
e
ex
p
lo
itin
g
f
e
w
co
ef
f
i
cien
ts
n
o
t
o
n
l
y
s
u
p
p
o
r
t
th
e
h
u
m
a
n
v
is
u
al
s
y
s
te
m
(
HVS)
by
p
r
eser
v
i
n
g
t
h
e
v
i
s
u
al
q
u
alit
y
o
f
w
a
ter
m
ar
k
ed
o
b
j
ec
t
b
u
t
also
co
n
tr
o
l
o
n
in
cr
ea
s
e
in
b
it
r
ate.
T
h
er
ef
o
r
e
it
is
s
u
g
g
e
s
ted
th
at
AC
co
ef
f
icie
n
t
s
b
ased
w
ater
m
ar
k
i
n
g
s
c
h
e
m
e
w
it
h
s
o
m
e
c
o
n
s
tr
ain
t
n
o
t
o
n
l
y
p
r
o
v
id
es
h
ig
h
v
is
u
al
q
u
alit
y
o
f
w
ater
m
ar
k
ed
v
id
eo
b
u
t
also
w
i
th
s
tan
d
a
g
ain
s
t
te
m
p
o
r
al
s
y
n
c
h
r
o
n
izat
io
n
attac
k
s
lik
e
f
r
a
m
e
i
n
s
er
tio
n
,
d
eletio
n
,
s
w
ap
p
i
n
g
a
n
d
av
er
a
g
i
n
g
.
I
n
v
ie
w
o
f
m
er
it
o
f
it,
t
h
e
p
r
o
p
o
s
ed
s
ch
e
m
e
h
as
ch
o
s
en
s
u
c
h
ar
ea
s
f
o
r
d
esig
n
in
g
t
h
e
v
id
eo
w
ater
m
ar
k
in
g
s
y
s
te
m
in
o
r
d
er
to
o
b
tain
th
e
b
alan
ce
tr
ad
eo
f
f
b
et
w
ee
n
p
er
ce
p
tib
ilit
y
an
d
r
o
b
u
s
t
n
es
s
.
Fig
u
r
e
1
.
B
lo
ck
d
iag
r
a
m
o
f
M
P
E
G
-
2
Stru
ctu
r
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
E
C
E
I
SS
N:
2
0
8
8
-
8708
R
o
b
u
s
t V
id
eo
W
a
terma
r
kin
g
S
ch
eme
B
a
s
ed
o
n
I
n
tr
a
C
o
d
in
g
P
r
o
ce
s
s
in
MPE
G
-
2
S
tyle
(
R
a
ke
s
h
A
h
u
ja
)
3335
Fig
u
r
e
2
.
Dec
o
d
in
g
an
d
d
is
p
l
a
y
o
r
d
er
o
f
GOP
Fig
u
r
e
3
.
E
n
co
d
in
g
an
d
p
r
o
ce
s
s
i
n
g
o
r
d
er
o
f
GOP
3.
P
RO
P
O
SE
D
M
E
T
H
O
D
T
h
e
p
r
o
p
o
s
ed
m
o
d
el
o
f
v
id
e
o
w
a
ter
m
ar
k
in
g
al
g
o
r
ith
m
is
b
ased
o
n
en
co
d
in
g
th
e
r
a
w
v
id
eo
in
MP
E
G
-
2
s
tan
d
ar
d
.
T
h
e
b
in
ar
y
w
a
ter
m
ar
k
is
e
m
b
ed
d
ed
o
n
l
y
in
t
h
o
s
e
s
elec
ted
q
u
an
tize
d
8
x
8
DC
T
b
lo
ck
s
w
h
ic
h
ar
e
ca
te
g
o
r
ized
as p
lain
DC
T
b
l
o
ck
as d
ef
i
n
ed
i
n
s
ec
t
i
o
n
3
.
2
.
T
h
e
ch
ar
ac
ter
is
tics
o
f
t
h
e
v
i
d
eo
f
r
a
m
e
ar
e
an
al
y
ze
d
i
n
o
r
d
er
to
f
i
n
d
t
h
e
a
p
p
r
o
p
r
iate
DC
T
b
lo
ck
u
s
ed
to
in
s
er
t
o
n
e
w
ater
m
ar
k
b
it
an
d
s
o
th
er
e
i
s
a
o
n
e
to
o
n
e
m
ap
p
i
n
g
b
et
w
ee
n
in
s
er
ti
n
g
b
it
a
n
d
s
e
lecte
d
b
lo
ck
.
S
in
g
le
co
ef
f
icie
n
t
i
n
s
tead
o
f
s
ev
er
al
A
C
co
ef
f
icie
n
ts
ex
p
lo
ited
to
o
b
tain
th
e
b
ette
r
q
u
alit
y
o
f
w
ater
m
ar
k
ed
v
i
d
eo
as
m
i
n
i
m
u
m
c
h
an
g
es
ar
e
r
eq
u
ir
ed
d
u
r
in
g
w
ater
m
ar
k
i
n
g
p
r
o
ce
s
s
.
T
h
is
n
o
t
o
n
l
y
m
i
n
i
m
izes
t
h
e
co
m
p
u
t
atio
n
co
s
t
b
u
t
al
s
o
aid
to
m
ai
n
tai
n
th
e
q
u
alit
y
o
f
w
ater
m
ar
k
ed
v
id
eo
.
T
h
e
e
m
b
e
d
d
in
g
p
r
o
ce
s
s
r
eq
u
ir
es o
n
l
y
t
w
o
f
r
eq
u
e
n
c
y
co
ef
f
icie
n
ts
lies
at
r
ig
h
t
m
o
s
t b
o
tto
m
r
ep
r
esen
ted
b
y
a
n
o
v
al
s
h
ap
e
as
s
h
o
w
n
i
n
th
e
F
ig
u
r
e
4
.
T
h
e
s
i
m
u
lat
io
n
r
es
u
lt
s
to
o
b
tain
t
h
e
el
ap
s
ed
C
P
U
ti
m
e
f
o
r
w
ater
m
ar
k
i
n
g
p
u
r
p
o
s
e
is
el
o
b
o
r
ated
in
th
e
ex
p
er
i
m
en
tal
s
ec
tio
n
4
.
3
.
3
.
1
.
K
ey
g
ener
a
t
io
ns
a
nd
w
a
t
er
m
a
r
k
p
re
pro
ce
s
s
ing
A
t
w
o
d
i
m
e
n
s
io
n
al
b
in
ar
y
i
m
ag
e
W
a
terma
r
k.
t
if
h
a
v
in
g
b
it
d
ep
th
1
u
s
ed
as
w
ater
m
ar
k
.
T
h
r
ee
k
ey
s
as
(
K1
,
K2
,
K3
)
ar
e
ex
tr
ac
te
d
f
r
o
m
t
h
e
w
ater
m
ar
k
it
s
el
f
in
th
e
f
o
llo
w
in
g
m
an
n
er
.
K1
an
d
K2
d
en
o
tes
th
e
n
u
m
b
er
o
f
r
o
w
s
an
d
co
lu
m
n
s
r
esp
ec
tiv
el
y
h
as
b
ee
n
u
s
ed
to
ex
tr
ac
t
th
e
w
ater
m
ar
k
.
K3
is
ev
alu
a
ted
f
r
o
m
t
h
e
s
ize
o
f
th
e
w
a
ter
m
ar
k
an
d
tr
ea
ted
as
th
ir
d
k
e
y
u
s
ed
to
s
t
o
p
th
e
ex
tr
ac
tio
n
p
r
o
ce
s
s
w
h
ile
r
ec
o
v
er
in
g
t
h
e
w
ater
m
ar
k
.
A
w
ater
m
ar
k
o
b
j
ec
t
is
en
cr
y
p
ted
b
y
u
s
in
g
d
o
u
b
le
co
lu
m
n
ar
tr
an
s
p
o
s
itio
n
m
et
h
o
d
[
1
1
]
b
ef
o
r
e
in
s
er
ti
n
g
in
to
v
io
d
e
o
b
j
ec
t
to
f
u
r
t
h
er
en
h
a
n
ce
th
e
s
ec
u
r
it
y
o
f
th
e
w
ater
m
ar
k
its
el
f
.
T
h
e
en
cr
y
p
ted
o
b
j
ec
t
is
co
n
v
er
ted
in
to
o
n
e
d
i
m
en
s
io
n
al
ar
r
ay
as
B
w
= {{
W
s
},
s
=1
,
2
,
……N;
W
s
є
{1
,
0
}}
to
p
ick
o
n
e
b
it a
t a
ti
m
e
.
3
.
2
.
E
x
t
ra
ct
io
n o
f
s
m
o
o
t
h
d
i
s
cr
et
e
c
o
s
ine t
ra
ns
f
o
r
m
b
lo
c
k
s
Dis
cr
ete
co
s
in
e
tr
a
n
s
f
o
r
m
[
1
2
]
is
th
e
p
r
o
ce
s
s
o
f
s
p
litt
i
n
g
th
e
h
o
s
t
s
i
g
n
a
l
in
to
f
o
u
r
f
r
eq
u
e
n
c
y
b
an
d
s
;
DC
,
lo
w
f
r
eq
u
e
n
c
y
(
L
f
)
,
h
i
g
h
f
r
eq
u
en
c
y
(
H
f
)
an
d
ed
g
e
s
(
E
d
)
as
s
h
o
w
n
i
n
f
o
llo
w
i
n
g
Fi
g
u
r
e
4
.
DC
ch
ar
ac
ter
ize
th
e
a
v
er
ag
e
in
f
o
r
m
at
io
n
co
n
t
ain
ed
b
y
th
e
s
i
g
n
a
l.
L
f
r
ep
r
esen
t
s
t
h
e
lo
w
f
r
eq
u
e
n
cies
r
eg
io
n
s
w
h
er
ea
s
H
f
ex
p
r
ess
es
th
e
p
i
x
els
lies
o
n
h
i
g
h
f
r
eq
u
e
n
cies
r
eg
io
n
s
.
Fi
n
all
y
,
E
d
d
en
o
tes t
h
e
p
i
x
els co
n
tai
n
in
g
t
h
e
f
r
eq
u
e
n
cies
at
ed
g
e
r
eg
io
n
s
.
D
C
T
an
d
f
u
r
th
er
q
u
an
tizat
io
n
o
p
er
atio
n
r
ed
u
ce
s
th
e
s
p
atia
l
r
ed
u
n
d
an
c
y
b
y
co
n
ce
n
tr
atin
g
en
er
g
y
in
f
e
w
co
e
f
f
ic
ien
t
s
lie
s
at
lef
t
u
p
p
er
p
ar
t
o
f
th
e
b
lo
ck
.
E
ac
h
DC
T
b
lo
ck
o
f
8
x
8
p
ix
els
is
f
u
r
t
h
er
class
i
f
ied
to
r
ec
o
g
n
ize
th
e
t
y
p
e
o
f
DC
T
b
lo
ck
as
p
er
th
e
f
o
llo
w
i
n
g
co
n
d
itio
n
s
[
1
3
]
.
A
b
lo
c
k
is
tr
ea
ted
as
ed
g
e
b
lo
ck
if
(
(
∑
L
f
+
∑
E
d
∑
H
f
)
>
4
)
o
th
er
w
is
e
i
f
(
∑
E
d
+
∑
H
f
)
≤
125
th
en
t
h
e
b
lo
ck
is
co
n
s
id
er
ed
as
p
lain
t
y
p
e
b
lo
ck
an
d
it
is
class
if
ied
as
tex
t
u
r
e
b
lo
ck
if
(
(
(
∑
L
f
+
∑
H
f
)
>
290
)
)
.
T
h
e
p
lai
n
t
y
p
e
o
f
b
lo
ck
s
ar
e
th
e
co
n
ce
r
n
i
n
th
e
p
r
o
p
o
s
ed
s
ch
e
m
e
a
s
t
h
ese
b
lo
ck
s
s
u
p
p
o
r
t
H
VS
a
n
d
r
est
o
th
er
s
ar
e
i
g
n
o
r
ed
f
r
o
m
w
ater
m
ar
k
i
n
g
p
r
o
ce
s
s
h
o
w
e
v
er
al
w
a
y
s
b
e
a
p
ar
t o
f
MP
E
G
-
2
co
m
p
r
ess
io
n
p
r
o
ce
s
s
.
Fig
u
r
e
4
.
C
lass
if
ica
tio
n
o
f
2
-
D
DC
T
b
lo
ck
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
J
E
C
E
Vo
l.
7
,
No
.
6
,
Dec
em
b
er
2
0
1
7
:
3
3
3
2
–
3
3
4
3
3336
3
.
3
.
Wa
t
er
m
a
r
k
I
ns
er
t
io
n P
ro
ce
s
s
T
h
e
em
b
ed
d
in
g
m
et
h
o
d
is
s
tar
ted
w
ith
e
x
tr
ac
ti
n
g
t
h
e
I
-
f
r
a
m
e
f
r
o
m
ea
ch
GOP
.
T
h
e
ex
tr
ac
ted
I
-
f
r
a
m
e
i
s
f
u
r
t
h
er
d
iv
id
ed
in
t
o
th
r
ee
ch
a
n
n
e
ls
;
o
n
e
as
l
u
m
i
n
an
ce
c
h
a
n
n
e
l
Y
a
n
d
o
th
er
t
wo
C
h
r
o
m
a
c
h
a
n
n
e
ls
k
n
o
w
n
as
C
B
an
d
C
R
r
esp
e
ctiv
el
y
.
Se
g
r
eg
ate
t
h
e
Y
-
co
m
p
o
n
en
t,
th
e
m
o
s
t
l
u
m
i
n
an
ce
p
ar
t,
in
to
n
o
n
-
o
v
er
lap
p
in
g
8
*
8
b
lo
ck
s
to
ap
p
ly
th
e
DC
T
an
d
q
u
an
tizatio
n
o
p
er
atio
n
u
s
in
g
s
tan
d
ar
d
q
u
an
t
izatio
n
m
atr
i
x
.
On
ce
it
i
s
co
n
f
ir
m
ed
t
h
at
th
e
c
u
r
r
en
t
b
lo
ck
i
s
s
m
o
o
t
h
DC
T
b
lo
ck
th
e
n
t
h
e
e
m
b
ed
d
in
g
p
r
o
ce
s
s
o
f
i
n
s
er
ti
n
g
o
n
e
sc
r
a
m
b
led
w
a
ter
m
ar
k
b
it is
d
eliv
er
ed
as f
o
llo
w
s
:
H
f
(
8
,
7
)
=
{
No
c
ha
n
ge
,
{
W
s
=
0
(
H
f
(
8
,
7
)
<
H
f
(
8
,
8
)
)
H
f
(
8
,
7
)
−
α
−
thre
s
hol
d
,
{
W
s
=
0
(
H
f
(
8
,
7
)
>
H
f
(
8
,
8
)
)
No
c
ha
n
ge
,
{
W
s
=
1
(
H
f
(
8
,
7
)
>
H
f
(
8
,
8
)
)
H
f
(
8
,
7
)
+
α
+
thre
s
hol
d
,
{
W
s
=
1
(
H
f
(
8
,
7
)
>
H
f
(
8
,
8
)
)
(
1
)
Fo
r
th
i
s
p
u
r
p
o
s
e,
o
n
l
y
t
w
o
A
C
co
ef
f
icie
n
ts
ar
e
u
tili
ze
d
an
d
o
n
e
o
f
th
e
m
r
eq
u
ir
es
ch
a
n
g
i
n
g
m
ar
g
i
n
all
y
a
s
p
er
th
e
c
lau
s
e
(
1
)
d
ef
in
ed
ab
o
v
e.
T
o
in
s
er
t
an
o
th
er
b
it,
s
e
lect
a
n
o
th
er
q
u
an
tized
p
lain
DC
T
b
lo
ck
to
e
m
b
ed
j
u
s
t
n
e
x
t
b
it
o
f
w
ater
m
ar
k
b
y
u
s
in
g
t
h
e
s
a
m
e
m
e
th
o
d
d
escr
ib
ed
ab
o
v
e.
T
h
e
p
r
o
ce
s
s
i
s
r
ep
ea
ted
till
en
tire
w
ater
m
ar
k
b
its
in
s
er
ted
i
n
eq
u
al
n
u
m
b
e
r
o
f
p
lain
t
y
p
es
o
f
b
lo
ck
s
.
D
u
r
in
g
t
h
is
p
r
o
ce
s
s
,
s
o
m
e
p
lai
n
DC
T
b
lo
ck
s
m
a
y
b
e
u
n
to
u
c
h
ed
i
f
t
h
e
n
u
m
b
er
s
o
f
s
u
c
h
b
lo
ck
s
ar
e
lar
g
er
t
h
an
t
h
e
n
u
m
b
er
o
f
w
ater
m
ar
k
b
its
.
I
n
o
r
d
er
to
r
ed
u
ce
t
h
e
p
r
o
b
ilit
y
o
f
e
s
ti
m
at
in
g
t
h
e
r
elatio
n
s
h
ip
b
et
w
ee
n
w
ater
m
ar
k
b
its
an
d
DC
T
b
lo
ck
s
,
a
g
ain
w
ater
m
ar
k
b
its
w
il
l
b
e
s
tar
ted
to
e
m
b
e
d
w
ater
m
ar
k
b
its
f
r
o
m
t
h
e
s
c
r
atch
f
o
r
r
e
m
ai
n
i
n
g
s
u
c
h
b
lo
ck
s
.
A
lt
h
o
u
g
h
t
h
is
p
r
o
ce
s
s
co
n
s
u
m
e
s
u
n
n
ec
e
s
s
ar
y
C
P
U
cy
les
b
u
t
p
r
o
v
id
es
th
e
a
d
d
itio
n
al
s
ec
u
r
it
y
to
th
e
o
v
er
all
w
ater
m
ar
k
i
n
g
p
r
o
ce
s
s
.
A
t
h
r
es
h
o
ld
m
u
s
t
b
e
s
et
b
y
c
o
n
f
ir
m
i
n
g
th
at
th
e
lo
w
er
v
al
u
e
m
u
s
t
r
e
m
ai
n
lo
w
er
an
d
h
ig
h
er
v
al
u
e
m
u
s
t
r
e
m
a
in
s
h
i
g
h
er
f
o
r
th
o
s
e
co
ef
f
icie
n
ts
p
ar
ticip
ati
n
g
i
n
th
e
w
a
ter
m
ar
k
in
g
p
r
o
ce
s
s
.
T
h
e
s
i
g
n
i
f
ica
n
ce
o
f
co
n
s
ta
n
t
is
s
et
to
0
.
1
en
s
u
r
e
s
th
at
th
is
w
ater
m
ar
k
i
n
g
al
g
o
r
ith
m
w
o
r
k
s
p
er
f
ec
tl
y
e
v
en
i
f
th
e
th
r
es
h
o
ld
is
f
i
x
ed
to
ze
r
o
.
T
h
e
th
r
esh
o
ld
b
est
w
o
r
t
h
o
b
tain
ed
at
0
.
3
ev
alu
ated
b
y
e
x
p
er
i
m
e
n
tal
r
es
u
lts
ex
p
lain
ed
in
s
ec
tio
n
4
.
1
.
T
h
e
s
c
h
e
m
e
r
ef
lec
ts
th
at
m
o
s
t
o
f
th
e
DC
T
b
lo
ck
s
,
co
m
es
u
n
d
er
t
h
e
ca
te
g
o
r
y
o
f
ed
g
e
an
d
te
x
t
u
r
e
b
lo
ck
r
e
m
ain
u
n
c
h
a
n
g
ed
d
u
r
i
n
g
t
h
e
w
ater
m
ar
k
i
n
g
.
I
t
n
o
t
o
n
l
y
m
ain
tai
n
s
t
h
e
v
i
s
u
al
q
u
a
lit
y
o
f
w
ater
m
ar
k
ed
v
id
eo
b
u
t
also
o
f
f
er
h
i
g
h
r
o
b
u
s
tn
e
s
s
.
T
h
e
s
tr
u
ctu
r
e
o
f
8
th
q
u
a
n
tized
p
lain
DC
T
b
lo
ck
f
r
o
m
1
3
1
st
I
-
f
r
a
m
e
b
ef
o
r
e
an
d
af
ter
e
m
b
ed
d
in
g
th
e
w
a
ter
m
ar
k
b
it
1
is
illu
s
tr
ated
in
F
ig
u
r
e
5
an
d
Fig
u
r
e
6
r
esp
ec
tiv
el
y
.
Fig
u
r
e
5
.
Qu
an
tized
D
C
T
b
lo
ck
F
ig
u
r
e
6
.
W
ater
m
ar
k
ed
Qu
a
n
tized
DC
T
b
lo
ck
3
.
4
.
Wa
t
er
m
a
r
k
E
x
t
ra
ct
io
n P
ro
ce
s
s
T
h
e
esti
m
a
tio
n
o
f
w
ater
m
ar
k
b
its
i
s
b
ased
o
n
t
h
e
r
elatio
n
s
h
ip
b
et
w
ee
n
t
h
e
co
e
f
f
ic
ien
t
s
b
elo
n
g
s
to
e
m
b
ed
d
in
g
r
eg
io
n
.
T
h
e
p
r
o
ce
s
s
o
f
r
etr
iev
al
o
f
w
ater
m
ar
k
o
b
j
ec
t
is
s
tar
ted
b
y
cr
ea
t
i
n
g
t
h
e
b
lan
k
m
a
tr
ix
w
it
h
th
e
aid
o
f
t
w
o
k
e
y
s
K1
a
n
d
K2
d
ef
in
ed
at
s
ec
tio
n
I
I
I
-
A
.
I
n
itialize
it
b
y
i
n
s
er
ti
n
g
w
it
h
‘
al
l
ze
r
o
s
’
.
T
h
is
w
a
y
en
s
u
r
e
ab
o
u
t
t
h
e
s
ize
o
f
th
e
r
etr
iev
in
g
w
ater
m
ar
k
.
P
ar
titi
o
n
t
h
e
w
ater
m
ar
k
ed
v
id
eo
i
n
t
o
th
e
s
eq
u
e
n
ce
o
f
f
r
a
m
e
s
.
W
h
ile
p
r
o
ce
s
s
in
g
I
-
f
r
a
m
e,
co
n
v
er
t
it
i
n
to
Y
C
B
C
R
s
p
ac
i
n
g
.
Select
t
h
e
Y
co
m
p
o
n
en
t
r
eq
u
ir
e
to
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
E
C
E
I
SS
N:
2
0
8
8
-
8708
R
o
b
u
s
t V
id
eo
W
a
terma
r
kin
g
S
ch
eme
B
a
s
ed
o
n
I
n
tr
a
C
o
d
in
g
P
r
o
ce
s
s
in
MPE
G
-
2
S
tyle
(
R
a
ke
s
h
A
h
u
ja
)
3337
s
eg
m
e
n
t
in
to
8
x
8
n
o
n
o
v
er
la
p
p
in
g
b
lo
ck
s
u
s
ed
to
p
er
f
o
r
m
DC
T
f
o
l
lo
w
ed
b
y
q
u
a
n
tiz
atio
n
p
r
o
ce
s
s
.
T
h
e
ex
tr
ac
tio
n
p
r
o
ce
s
s
is
s
tar
ted
ju
s
t
a
f
t
er
co
n
f
ir
m
i
n
g
th
a
t
th
e
c
u
r
r
en
t
b
lo
ck
is
p
lai
n
DC
T
b
lo
ck
.
T
h
e
r
etr
iev
al
o
f
b
its
is
d
escr
ib
ed
as f
o
llo
w
s
:
W
s
′
=
{
0
,
H
f
(
8
,
7
)
<
H
f
(
8
,
8
)
1
,
(
2
)
if
th
e
co
e
f
f
ic
ien
t
v
al
u
e
o
f
H
f
(
8
,
7
)
is
less
t
h
an
t
h
e
co
ef
f
icie
n
t
v
a
lu
e
o
f
H
f
(
8
,
8
)
th
e
n
w
a
ter
m
ar
k
b
it
‘
0
’
o
th
er
w
is
e
‘
1
’
is
e
x
tr
ac
ted
a
n
d
s
to
r
e
i
n
to
th
e
b
u
f
f
er
.
No
w
t
h
e
b
u
f
f
er
is
i
n
cr
e
m
e
n
te
d
b
y
o
n
e.
B
ef
o
r
e
in
cr
e
m
e
n
ti
n
g
th
e
b
u
f
f
er
,
o
n
e
m
o
r
e
co
n
d
itio
n
is
ap
p
lied
to
ch
ec
k
t
h
at
w
h
eth
er
t
h
e
b
u
f
f
er
s
ize
is
eq
u
al
to
th
e
s
ize
o
f
t
h
ir
d
k
e
y
K3
de
f
in
ed
at
s
ec
tio
n
3
.
1
.
I
f
t
h
e
cla
u
s
e
is
tr
u
e
t
h
e
n
e
x
tr
ac
tio
n
p
r
o
ce
s
s
w
il
l
s
to
p
o
th
er
w
is
e
co
n
tin
u
e
to
e
x
to
r
t
an
o
t
h
er
q
u
an
tized
p
lain
DC
T
b
lo
ck
to
ap
p
r
o
x
im
a
te
n
e
x
t
b
it
o
f
w
ater
m
ar
k
.
Ho
w
e
v
er
,
th
e
r
ec
o
v
er
ed
w
ater
m
ar
k
is
i
n
e
n
cr
y
p
ted
f
o
r
m
w
h
ich
i
s
d
ec
r
y
p
ted
b
y
u
s
i
n
g
t
h
e
d
o
u
b
le
co
l
u
m
n
ar
tr
an
s
p
o
s
it
io
n
alg
o
r
ith
m
[
1
0
]
.
4.
E
XP
E
R
I
M
E
NT
A
L
RE
SUL
T
S AN
D
A
NALY
SI
S
T
h
e
p
er
f
o
r
m
a
n
ce
o
f
t
h
e
v
id
eo
w
ater
m
ar
k
i
n
g
s
ch
e
m
e
i
n
th
i
s
p
ap
er
ap
p
r
aised
b
y
ac
co
m
p
lis
h
in
g
to
tal
6
s
tan
d
ar
d
v
id
eo
s
eq
u
e
n
ce
s
as
A
kiyo
,
F
o
r
ema
n
,
Mo
th
er,
Ha
ll,
C
o
n
ta
in
er
a
n
d
C
o
a
s
tg
u
a
r
d
w
i
th
d
i
f
f
er
e
n
t
m
o
tio
n
co
m
p
le
x
it
y
.
T
h
ese
v
id
eo
s
eq
u
en
ce
s
h
a
v
e
m
i
n
i
m
u
m
3
0
0
an
d
m
a
x
i
m
u
m
3
5
0
f
r
a
m
e
s
.
T
h
e
clip
A
kiyo
is
s
tatic
v
id
eo
s
eq
u
en
ce
h
a
v
i
n
g
s
till
b
ac
k
g
r
o
u
n
d
.
A
n
e
w
s
r
ea
d
er
is
h
av
i
n
g
o
n
l
y
lip
s
m
o
v
e
m
e
n
ts
an
d
r
est
p
ar
t
o
f
th
e
v
id
eo
in
cl
u
d
in
g
b
ac
k
g
r
o
u
n
d
is
i
m
m
o
v
ab
le
t
h
r
o
u
g
h
o
u
t
t
h
e
p
la
y
in
g
o
f
v
id
eo
.
F
o
r
ema
n
s
eq
u
en
ce
is
o
f
d
y
n
a
m
ic
m
o
tio
n
co
m
p
lex
i
t
y
s
i
n
ce
a
f
r
e
q
u
en
t
s
ce
n
e
c
h
a
n
g
e
o
cc
u
r
s
d
u
r
in
g
t
h
e
e
n
tire
p
la
y
in
g
o
f
v
id
e
o
clip
.
Mo
th
er
an
d
Ha
ll
ar
e
al
m
o
s
t
s
till
b
ac
k
g
r
o
u
n
d
an
d
l
ittl
e
f
o
r
eg
r
o
u
n
d
m
o
ti
o
n
s
ce
n
e
n
o
ticed
.
C
o
n
ta
in
er
i
s
s
lo
w
b
ac
k
g
r
o
u
n
d
an
d
s
lo
w
f
o
r
eg
r
o
u
n
d
m
o
tio
n
s
ce
n
e.
C
o
a
s
tg
u
a
r
d
is
co
n
ti
n
u
o
u
s
m
o
tio
n
co
m
p
le
x
it
y
v
id
eo
.
A
b
in
ar
y
w
a
ter
m
ar
k
lo
g
o
.
tif
w
i
th
s
ize
5
0
x
1
0
0
is
ch
o
s
en
as
s
h
o
w
n
in
t
h
e
Fig
u
r
e
7
b
.
Sa
m
p
le
v
id
eo
s
w
ith
w
at
er
m
ar
k
ar
e
ex
p
lo
r
ed
in
Fi
g
u
r
e
7
.
Fig
u
r
e
7
.
Si
m
u
latio
n
r
esu
l
ts
f
r
o
m
p
r
o
p
o
s
ed
v
id
eo
w
ater
m
ar
k
in
g
Sch
e
m
e
a)
9
0
th
o
r
ig
in
al
f
r
a
m
e
f
r
o
m
Or
i
g
in
a
l V
id
eo
A
kiyo
b)
Or
ig
i
n
al
W
ater
m
ar
k
lo
g
o
.
tif
c)
9
0
th
W
ater
m
ar
k
ed
Vid
eo
f
r
am
e
d)
E
x
tr
ac
ted
w
ater
m
ar
k
e)
9
5
th
r
a
w
v
id
eo
f
r
a
m
e
f)
P
u
r
e
w
ater
m
ar
k
‘
lo
g
o
.
ti
f
’
u
s
ed
to
in
s
er
t in
r
a
w
v
id
eo
s
eq
u
en
c
e
Fo
r
em
a
n
g)
9
0
th
W
ater
m
ar
k
ed
v
id
eo
f
r
a
m
e
f
r
o
m
w
ater
m
ar
k
ed
v
id
eo
s
eq
u
en
ce
Fo
r
e
m
an
h)
E
x
tr
ac
ted
w
ater
m
ar
k
f
r
o
m
w
at
er
m
ar
k
ed
v
id
eo
s
eq
u
e
n
ce
Fo
r
em
an
w
ith
n
o
attac
k
s
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
J
E
C
E
Vo
l.
7
,
No
.
6
,
Dec
em
b
er
2
0
1
7
:
3
3
3
2
–
3
3
4
3
3338
T
h
e
s
i
m
u
latio
n
r
esu
lts
f
o
r
ev
alu
ati
n
g
th
e
p
er
f
o
r
m
a
n
ce
o
f
th
is
alg
o
r
it
h
m
ar
e
ca
teg
o
r
ize
d
in
t
h
r
ee
w
a
y
s
:
E
v
al
u
ati
n
g
t
h
e
t
h
r
es
h
o
l
d
,
test
in
g
t
h
e
a
v
er
ag
e
p
er
ce
p
tu
al
q
u
a
lit
y
a
n
d
esti
m
ati
n
g
t
h
e
r
o
b
u
s
tn
e
s
s
a
g
ai
n
s
t
in
te
n
tio
n
al,
u
n
in
te
n
tio
n
al
s
i
g
n
al
p
r
o
ce
s
s
i
n
g
,
r
e
-
en
co
d
i
n
g
an
d
f
r
a
m
e
b
ased
attac
k
s
.
T
h
ese
m
ea
s
u
r
i
n
g
p
ar
am
eter
s
ar
e
d
escr
ib
ed
as f
o
llo
w
s
:
PS
N
R
i
=
20l
og
10
(
(
Highe
s
t
i
)
|
√
M
SE
)
(
3
)
M
SE
=
1
MxN
∑
∑
[
F
(
i
,
j
)
−
F
W
(
i
,
j
)
]
N
J
=
1
M
i
=
1
(
4
)
PS
N
R
av
g
=
∑
PS
N
R
i
n
(
5
)
T
h
e
p
er
ce
p
tu
al
q
u
alit
y
o
f
w
at
er
m
ar
k
ed
v
id
eo
is
d
eter
m
i
n
ed
in
ter
m
s
o
f
P
ea
k
Si
g
n
al
T
o
No
is
e
R
atio
(
PS
N
R
i
)
w
h
er
e
i
d
en
o
tes
th
e
i
th
w
ate
r
m
ar
k
ed
v
id
eo
.
PS
N
R
av
g
is
o
b
tain
ed
b
y
s
u
m
m
i
n
g
t
h
e
P
SNR
f
r
o
m
al
l
th
e
w
ater
m
ar
k
ed
s
eq
u
en
ce
s
d
iv
id
ed
b
y
t
h
e
to
tal
n
u
m
b
er
o
f
v
id
eo
s
eq
u
en
ce
s
(
n
)
.
T
h
e
r
o
b
u
s
t
n
es
s
is
e
v
al
u
ated
b
y
th
e
f
o
llo
w
i
n
g
m
e
th
o
d
.
NC
=
∑
∑
W
(
i
,
j
)
.
W
′
(
i
,
j
)
j
i
∑
∑
[
W
(
i
,
j
)
]
2
j
i
(
6
)
W
(
i
,
j
)
a
n
d
W
′
(
i
,
j
)
ar
e
th
e
p
ix
els o
f
o
r
i
g
in
al
a
n
d
ex
tr
ac
ted
w
a
ter
m
ar
k
s
r
esp
ec
ti
v
el
y
.
4
.
1
.
T
hres
ho
ld Set
t
ing
Six
s
ta
n
d
ar
d
v
id
eo
s
eq
u
e
n
ce
s
A
kiyo
,
F
o
r
ema
n
,
C
o
a
s
tg
u
a
r
d
,
C
o
n
ta
in
er,
Ha
ll
a
n
d
Mo
th
er
ar
e
u
s
ed
t
o
f
i
x
th
e
t
h
r
esh
o
ld
in
o
r
d
er
to
b
alan
ce
th
e
tr
ad
eo
f
f
b
et
w
ee
n
p
er
ce
p
tib
ilit
y
an
d
r
o
b
u
s
tn
e
s
s
.
T
w
o
ex
p
er
i
m
en
t
s
ar
e
p
er
f
o
r
m
ed
to
f
u
lf
ill
th
e
ai
m
.
First
s
i
m
u
latio
n
i
s
ca
r
r
ied
o
u
t
to
esti
m
ate
th
e
s
i
m
i
lar
ities
(
NC
)
o
f
ex
tr
ac
ted
w
ater
m
ar
k
at
d
is
cr
ete
i
n
t
er
v
al
o
f
th
r
es
h
o
ld
as
ex
p
o
s
ed
in
F
ig
u
r
e
8
an
d
s
ec
o
n
d
ex
p
er
i
m
e
n
t
ev
alu
a
tes
t
h
e
v
i
s
u
a
l
q
u
alit
y
(
P
SNR
)
o
f
w
ater
m
ar
k
ed
v
id
eo
b
y
v
ar
y
i
n
g
th
e
th
r
es
h
o
ld
as
d
escr
ib
ed
in
Fig
u
r
e
9
.
I
t
is
p
er
ce
iv
ed
f
r
o
m
th
e
e
x
p
er
i
m
e
n
tal
r
es
u
lt
s
t
h
at
m
o
r
e
th
a
n
3
0
d
B
o
f
P
SNR
a
n
d
7
0
%
o
r
ab
o
v
e
NC
p
r
o
v
id
e
th
e
s
atis
f
ac
to
r
y
r
e
s
u
l
t
s
f
o
r
p
er
ce
p
tib
ilit
y
a
n
d
r
o
b
u
s
t
n
e
s
s
i
s
s
u
e
r
esp
ec
ti
v
el
y
f
o
r
an
y
v
id
eo
w
ater
m
ar
k
i
n
g
s
c
h
e
m
e.
Fr
o
m
t
h
e
Fi
g
u
r
e
8
,
it
is
ap
p
ar
en
t
th
at
P
SNR
is
d
ec
r
ea
s
in
g
as
i
n
cr
ea
s
in
g
t
h
e
th
r
es
h
o
ld
.
T
h
e
av
er
ag
e
P
SNR
is
3
8
.
6
0
1
0
o
b
tain
ed
a
t
th
r
es
h
o
ld
o
f
0
.
4
an
d
a
v
er
ag
e
NC
at
tain
ed
is
0
.
9
9
9
8
5
ag
ain
s
t
t
h
e
th
r
es
h
o
ld
0
.
2
co
n
s
id
er
in
g
f
o
r
all
t
h
e
v
id
eo
s
eq
u
en
ce
s
.
T
o
m
a
k
e
t
h
e
b
ala
n
ce
b
et
w
ee
n
s
i
m
ilar
it
y
m
ea
s
u
r
e
a
n
d
p
er
ce
p
tib
ilit
y
,
t
h
e
av
er
ag
e
t
h
r
es
h
o
ld
i
s
(
0
.
4
+0
.
2
)
/2
=
0
.
3
.
NC
=1
r
ef
lect
th
at
1
0
0
%
w
a
ter
m
ar
k
i
s
s
u
cc
ess
f
u
l
l
y
e
x
tr
ac
ted
i
n
ca
s
e
o
f
n
o
attac
k
f
r
o
m
m
o
s
t
o
f
th
e
v
id
eo
s
eq
u
en
ce
s
as s
h
o
w
n
i
n
th
e
T
ab
le
1
.
T
ab
le
1
.
T
h
e
ef
f
ec
t o
f
P
SNR
a
n
d
NC
o
n
t
h
r
es
h
o
ld
f
o
r
d
if
f
er
e
n
t v
id
eo
s
eq
u
e
n
ce
s
V
i
d
e
o
C
l
i
p
A
k
i
y
o
F
o
r
e
man
C
o
a
st
g
u
a
r
d
C
o
n
t
a
i
n
e
r
H
a
l
l
M
o
t
h
e
r
Th
r
e
s
h
o
l
d
P
S
N
R
NC
P
S
N
R
NC
P
S
N
R
NC
P
S
N
R
NC
P
S
N
R
NC
P
S
N
R
NC
0
.
1
4
7
.
3
3
5
1
4
4
.
3
1
4
1
4
6
.
6
5
4
1
4
5
.
1
1
2
0
.
9
9
9
7
8
4
3
.
8
0
7
8
1
4
8
.
4
4
2
1
0
.
2
4
4
.
3
2
8
1
4
1
.
1
1
3
1
4
4
.
8
9
9
1
4
1
.
5
4
3
0
.
9
9
9
8
9
4
0
.
7
6
0
1
0
.
9
9
9
8
4
4
.
2
8
2
1
0
.
3
4
3
.
8
2
2
1
4
0
.
6
7
4
1
4
2
.
5
6
6
1
3
9
.
7
5
4
0
.
9
9
9
8
4
3
9
.
3
2
1
9
0
.
9
9
9
9
4
2
.
6
9
2
1
0
.
4
4
1
.
6
5
3
1
3
9
.
0
0
1
1
4
0
.
1
9
8
1
3
7
.
0
0
6
0
.
9
9
9
6
7
3
6
.
2
9
8
6
0
.
9
9
9
3
4
0
.
2
9
3
1
0
.
5
3
6
.
4
3
2
1
3
5
.
4
3
3
1
3
8
.
5
6
4
1
3
3
.
4
8
3
0
.
9
9
9
5
6
3
5
.
7
6
4
3
0
.
9
9
9
3
3
8
.
2
9
8
1
0
.
7
5
3
4
.
6
1
9
1
3
3
.
1
1
2
1
3
5
.
2
2
3
1
3
1
.
9
7
2
0
.
9
9
9
4
4
3
4
.
5
4
3
2
0
.
9
9
9
2
3
5
.
2
7
1
1
1
3
1
.
9
5
6
1
3
0
.
6
2
3
1
3
0
.
6
2
5
1
2
5
.
6
7
5
0
.
9
9
9
1
3
0
.
8
9
1
1
0
.
9
9
9
3
2
.
9
0
2
1
A
v
e
r
a
g
e
4
0
.
0
2
1
3
7
.
7
5
3
1
3
9
.
8
1
9
1
3
6
.
3
6
4
0
.
9
9
9
6
1
3
7
.
3
4
1
0
.
9
9
9
5
4
0
.
3
1
1
1
PS
N
R
a
v
g
3
8
.
6
0
1
0
NC
a
v
g
0
.
9
9
9
8
5
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
E
C
E
I
SS
N:
2
0
8
8
-
8708
R
o
b
u
s
t V
id
eo
W
a
terma
r
kin
g
S
ch
eme
B
a
s
ed
o
n
I
n
tr
a
C
o
d
in
g
P
r
o
ce
s
s
in
MPE
G
-
2
S
tyle
(
R
a
ke
s
h
A
h
u
ja
)
3339
Fig
u
r
e
8
.
NC
Vs
T
h
r
esh
o
ld
Fig
u
r
e
9
.
P
SNR
Vs T
h
r
esh
o
ld
4
.
2
.
E
v
a
lua
t
io
n o
f
Ro
bu
s
t
nes
s
by
Appl
y
ing
I
nte
ntio
na
l a
nd
U
nin
t
ent
io
na
l A
t
t
a
cks
Sev
er
al
e
x
p
er
i
m
e
n
ts
h
a
v
e
b
e
en
e
v
alu
ated
to
j
u
d
g
e
t
h
e
r
o
b
u
s
tn
e
s
s
o
f
t
h
e
p
r
o
p
o
s
ed
s
ch
e
m
e
b
y
co
n
s
id
er
in
g
t
h
e
v
id
eo
A
k
i
y
o
.
T
o
f
u
l
f
ill
t
h
i
s
p
u
r
p
o
s
e,
attac
k
s
ar
e
ap
p
lied
o
n
th
e
w
ater
m
ar
k
ed
v
id
eo
to
r
etr
iev
e
th
e
w
ater
m
ar
k
.
T
h
e
attac
k
s
ar
e
b
ased
o
n
u
tili
zi
n
g
th
e
p
r
o
p
er
ties
o
f
v
id
eo
its
el
f
.
On
e
o
f
th
e
p
r
o
p
er
ties
o
f
v
id
eo
is
its
te
m
p
o
r
al
ch
ar
ac
ter
is
tic
,
th
e
s
eq
u
en
ce
o
f
s
t
ill
i
m
ag
e
s
k
n
o
w
n
as
v
id
eo
f
r
a
m
es.
C
h
an
g
i
n
g
t
h
e
o
r
d
er
o
f
s
o
m
e
o
f
t
h
e
n
ei
g
h
b
o
r
in
g
f
r
a
m
es
b
y
a
n
attac
k
er
i
n
s
i
g
n
i
f
ican
t
af
f
ec
t
o
n
t
h
e
p
er
ce
p
tu
al
q
u
ali
t
y
o
f
w
ater
m
ar
k
ed
v
id
eo
b
u
t
co
r
r
u
p
t
th
e
e
m
b
ed
d
ed
s
ig
n
al
i
n
to
it.
An
o
th
er
c
h
a
r
ac
ter
is
tic
o
f
v
id
eo
is
to
co
n
ta
in
t
h
e
lar
g
e
a
m
o
u
n
t
o
f
r
ed
u
n
d
a
n
cies a
m
o
n
g
th
e
f
r
a
m
es.
D
u
e
to
th
i
s
,
f
r
a
m
e
s
d
r
o
p
p
in
g
,
f
r
a
m
e
av
er
a
g
i
n
g
a
n
d
f
r
a
m
e
cr
o
p
p
in
g
a
ttack
s
ca
n
b
e
ap
p
lied
to
d
is
t
u
r
b
o
r
c
o
m
p
lete
l
y
r
e
m
o
v
e
t
h
e
w
ater
m
ar
k
.
A
cr
ac
k
er
ca
n
d
is
t
u
r
b
th
e
w
ater
m
ar
k
w
h
il
e
p
r
eser
v
in
g
th
e
q
u
alit
y
o
f
w
at
er
m
ar
k
ed
v
id
eo
b
y
d
r
o
p
p
in
g
s
o
m
e
o
f
t
h
e
f
r
a
m
es
an
d
/o
r
r
ep
lacin
g
th
e
s
a
m
e
f
r
a
m
e
s
w
i
th
th
e
o
r
ig
i
n
al
s
o
t
h
at
th
e
to
tal
n
u
m
b
er
o
f
f
r
a
m
e
s
w
il
l
n
o
t
b
e
r
ed
u
ce
.
So
m
e
o
f
t
h
e
attac
k
s
o
n
v
id
eo
w
ater
m
ar
k
ed
s
i
g
n
al
ar
e
in
h
er
it
ed
f
r
o
m
i
m
a
g
e
w
ater
m
ar
k
i
n
g
.
T
h
ese
attac
k
s
i
n
cl
u
d
e
g
eo
m
e
tr
ic
attac
k
s
co
n
tai
n
s
r
o
tatio
n
an
d
cr
o
p
p
in
g
an
d
v
ar
io
u
s
n
o
i
s
e
in
s
er
tio
n
attac
k
s
as
S
p
ec
kle
n
o
is
e
,
Ga
u
s
s
ia
n
n
o
is
e
,
S
a
lt
a
n
d
p
e
p
p
er
n
o
is
e
a
n
d
P
o
is
s
o
n
n
o
is
e
.
T
h
e
p
r
o
p
o
s
ed
s
ch
e
m
e
s
i
m
u
lated
t
h
e
r
o
b
u
s
tn
es
s
ag
ai
n
s
t a
ll a
b
o
v
e
d
ef
in
ed
attac
k
.
Fig
u
r
e
1
0
.
NC
Vs R
o
tatio
n
(
°
)
Fig
u
r
e
1
1
.
NC
Vs C
r
o
p
p
in
g
4
.
2
.
1
.
F
ra
m
es a
v
er
a
g
ing
a
t
t
a
ck
An
o
th
er
s
ig
n
i
f
ica
n
t
v
id
eo
w
a
ter
m
ar
k
i
n
g
attac
k
i
s
f
r
a
m
e
a
v
er
ag
i
n
g
attac
k
.
Av
er
ag
e
o
f
n
u
m
er
o
u
s
f
r
a
m
e
s
w
ill
eli
m
i
n
ate
th
e
co
m
p
o
s
itio
n
o
f
th
e
w
ater
m
ar
k
.
I
t
in
d
icate
s
t
h
at
th
e
c
u
r
r
en
t
f
r
a
m
e
is
r
ep
lace
d
w
it
h
th
e
av
er
a
g
e
o
f
it
s
o
w
n
,
p
r
ev
io
u
s
a
n
d
n
ex
t
ad
j
ac
en
t
f
r
a
m
e.
2
5
%
o
f
th
e
w
a
ter
m
ar
k
ed
v
id
eo
f
r
a
m
es
ar
e
av
er
a
g
ed
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
J
E
C
E
Vo
l.
7
,
No
.
6
,
Dec
em
b
er
2
0
1
7
:
3
3
3
2
–
3
3
4
3
3340
to
j
u
d
g
e
th
e
p
er
f
o
r
m
a
n
ce
o
f
t
h
e
s
ch
e
m
e.
I
t
in
d
icate
s
th
at
e
v
er
y
4
th
w
ater
m
ar
k
ed
f
r
a
m
e
i
s
av
er
ag
ed
w
it
h
its
t
w
o
j
u
s
t
n
ei
g
h
b
o
r
in
g
f
r
a
m
es a
n
d
r
esu
lta
n
t
f
r
a
m
e
i
s
r
ep
lace
d
w
it
h
t
h
e
cu
r
r
en
t o
n
e.
4
.
2
.
2
.
F
ra
m
e
s
w
a
pp
ing
a
t
t
a
ck
Fra
m
e
a
v
er
ag
i
n
g
ca
n
al
s
o
o
b
liter
ate
th
e
w
ater
m
ar
k
ed
v
i
d
eo
an
d
th
er
ef
o
r
e
af
f
ec
t
t
h
e
ex
tr
ac
tio
n
q
u
alit
y
o
f
w
ater
m
ar
k
.
I
t
ex
p
r
ess
ed
b
y
d
ef
in
i
n
g
F
k
=F
k
-
1
an
d
F
k
-
1
=
F
k
.
A
g
a
in
,
2
5
%
o
f
th
e
w
ater
m
ar
k
ed
v
id
eo
is
p
ass
es
th
r
o
u
g
h
th
i
s
attac
k
.
I
n
th
is
ex
p
er
i
m
en
t,
ev
er
y
f
o
u
r
th
f
r
a
m
e
is
s
w
ap
p
ed
w
i
th
i
ts
n
ex
t
n
ei
g
h
b
o
r
in
g
f
r
a
m
e.
As
th
e
s
w
ap
p
in
g
p
r
o
ce
s
s
is
s
tar
ted
f
r
o
m
t
h
e
f
ir
s
t
f
r
a
m
e,
5
0
%
o
f
th
e
w
a
ter
m
a
r
k
ed
I
-
f
r
a
m
es
w
er
e
r
ep
lace
d
w
it
h
j
u
s
t
a
h
ea
d
n
o
n
w
ater
m
ar
k
ed
B
-
f
r
a
m
es.
T
h
e
e
f
f
ec
ted
I
-
f
r
a
m
e
s
ar
e
1
st
,
2
1
st
,
41
st
,
6
1
st
,
8
1
st
,
1
0
1
st
,
121
st
,
141
st
,
1
6
1
st
,
1
8
1
st
,
2
0
1
st
,
2
2
1
st
,
2
4
1
st
,
2
6
1
st
,
2
8
1
st
.
4
.
2
.
3
.
F
ra
m
e
dro
p
pin
g
/ r
epla
ce
m
e
nt
a
t
t
a
ck
On
e
o
f
th
e
p
r
o
p
er
ties
o
f
v
i
d
eo
is
th
e
e
x
is
te
n
ce
o
f
r
ed
u
n
d
a
n
c
y
in
its
f
r
a
m
es.
B
y
u
s
i
n
g
t
h
i
s
ch
ar
ac
ter
is
tic,
a
m
alicio
u
s
u
s
e
r
s
elec
t
s
o
m
e
f
r
a
m
es
f
r
o
m
d
if
f
er
en
t
p
ar
t
o
f
w
ater
m
ar
k
ed
v
id
eo
an
d
ca
n
d
r
o
p
in
t
w
o
d
if
f
er
e
n
t
w
a
y
s
.
I
n
t
h
e
f
ir
s
t
ca
s
e,
th
e
s
elec
ted
v
id
eo
f
r
a
m
es
w
er
e
d
r
o
p
p
ed
p
e
r
m
a
n
e
n
tl
y
f
r
o
m
w
ater
m
ar
k
ed
v
id
eo
an
d
i
n
o
t
h
er
ca
s
e
t
h
e
s
e
lecte
d
f
r
a
m
es
w
er
e
r
ep
lace
d
b
y
t
h
eir
co
r
r
es
p
o
n
d
in
g
o
r
ig
i
n
al
f
r
a
m
e.
I
n
b
o
t
h
t
h
e
ca
s
es,
a
n
attac
k
er
ta
k
es
ca
r
e
t
h
e
p
er
ce
p
tib
ilit
y
o
f
w
ater
m
ar
k
ed
v
id
eo
m
u
s
t
n
o
t
b
e
d
eg
r
ad
e
d
s
ig
n
i
f
ica
n
tl
y
.
T
h
e
ex
p
er
i
m
e
n
tal
s
i
m
u
la
tio
n
i
s
ca
r
r
ied
o
u
t
f
o
r
b
o
th
t
h
e
ca
s
e
s
.
T
o
f
u
lf
il
l
t
h
is
p
u
r
p
o
s
e,
2
5
%
o
f
th
e
f
r
a
m
es
ar
e
r
e
m
o
v
ed
f
r
o
m
t
h
e
w
ater
m
ar
k
e
d
v
id
eo
w
h
ic
h
eli
m
i
n
ates
t
h
e
1
1
th
,
2
1
st
,
3
1
st
,
4
1
st
,
6
1
st
,
7
1
st
w
ater
m
ar
k
ed
I
-
f
r
a
m
e
s
also
.
T
h
e
s
ec
o
n
d
ca
s
e
also
r
ep
lace
d
th
e
f
ir
s
t
2
5
%
o
f
th
e
w
ater
m
ar
k
ed
f
r
a
m
es
f
r
o
m
t
h
e
f
r
a
m
es
o
f
o
r
ig
in
al
v
id
eo
.
I
t
r
ep
lace
d
th
e
1
1
th
,
2
1
st
,
3
1
st
,
4
1
st
,
6
1
st
,
7
1
st
w
ater
m
ar
k
ed
I
-
f
r
a
m
es
f
r
o
m
th
e
co
r
r
esp
o
n
d
in
g
o
r
ig
in
al
n
o
n
-
w
ater
m
ar
k
ed
I
-
f
r
a
m
es.
4
.
2
.
4
.
No
is
e,
F
ilte
ring
a
nd
Co
m
pre
s
s
io
n At
t
a
c
k
s
A
d
d
in
g
n
o
is
e
i
n
to
t
h
e
w
ater
m
ar
k
ed
v
id
eo
i
s
a
n
o
th
er
w
a
y
to
j
u
d
g
e
t
h
e
r
o
b
u
s
tn
e
s
s
o
f
t
h
e
e
m
b
ed
d
ed
w
ater
m
ar
k
.
Fo
u
r
d
if
f
er
en
t
ca
te
g
o
r
ies
o
f
n
o
i
s
es
Sp
ec
k
le,
P
o
is
s
o
n
,
Gau
s
s
ia
n
an
d
Sal
t
an
d
P
ep
p
er
w
er
e
ad
d
ed
in
o
r
d
er
to
test
th
e
r
o
b
u
s
tn
es
s
.
Du
e
to
th
is
,
t
h
e
ad
v
er
s
e
a
f
f
e
cts
is
to
f
ac
e
th
e
d
i
f
f
icu
lties
w
h
ile
r
etr
ie
v
in
g
t
h
e
w
ater
m
ar
k
i
n
f
o
r
m
atio
n
.
T
h
e
p
r
o
p
o
s
ed
s
ch
e
m
e
ap
p
lied
m
u
ltip
licati
v
e
n
o
i
s
e
as
s
p
ec
k
le
n
o
i
s
e
to
ea
ch
w
ater
m
ar
k
ed
f
r
a
m
e
b
y
u
s
i
n
g
t
h
e
f
o
llo
w
i
n
g
m
et
h
o
d
.
F
r
a
me
A
i
=
fr
a
me
W
i
(
1
+
n
)
(
7
)
fr
a
me
W
i
d
en
o
tes
th
e
i
-
f
r
a
m
e
f
r
o
m
t
h
e
w
ater
m
ar
k
ed
-
v
id
eo
(
w
)
,
n
i
s
th
e
eq
u
a
ll
y
s
ca
tter
ed
r
an
d
o
m
n
o
is
e
w
it
h
m
ea
n
ze
r
o
an
d
v
ar
ian
ce
0
.
0
4
an
d
fr
a
me
A
i
is
th
e
r
e
s
u
lta
n
t
co
r
r
esp
o
n
d
in
g
attac
k
ed
ith
-
f
r
a
m
e.
P
o
is
s
o
n
n
o
is
e
is
g
e
n
er
ated
f
r
o
m
t
h
e
w
ater
m
ar
k
ed
v
id
eo
o
b
j
ec
t
its
el
f
in
s
tead
o
f
ad
d
i
n
g
ar
ti
f
icial
n
o
i
s
e.
Gau
s
s
ia
n
n
o
is
e
w
it
h
ze
r
o
m
ea
n
an
d
0
.
0
1
o
f
v
ar
ian
ce
is
ap
p
li
ed
o
n
th
e
w
ater
m
ar
k
ed
v
id
eo
.
As
th
e
s
ize
o
f
ea
c
h
w
ater
m
ar
k
ed
f
r
a
m
e
i
s
1
4
4
x
1
7
6
=2
5
3
4
4
,
th
e
n
u
m
b
er
o
f
ele
m
en
t a
f
f
ec
ted
b
y
ad
d
in
g
s
alt
a
n
d
p
ep
p
er
n
o
is
e
w
it
h
in
te
n
s
it
y
0
.
1
is
2
5
3
4
4
*
0
.
1
=
2
5
3
4
p
ix
els.
On
t
h
e
co
n
tr
ar
y
,
m
ed
ian
f
ilter
is
u
s
ed
to
r
e
m
o
v
e
th
e
n
o
is
e
s
f
r
o
m
th
e
m
u
lti
m
ed
ia
o
b
j
ec
ts
.
I
t
i
s
o
n
e
o
f
t
h
e
m
o
s
t
co
m
m
o
n
u
n
i
n
t
en
tio
n
al
attac
k
s
i
n
d
ig
ital
v
id
eo
.
B
y
cr
ea
tin
g
th
e
w
i
n
d
o
w
s
ize
o
f
3
x
3
,
t
h
e
m
ed
ian
f
ilter
i
s
ap
p
lied
o
n
t
h
e
w
ater
m
ar
k
ed
v
id
eo
to
ex
tr
ac
t
th
e
w
ater
m
ar
k
.
C
er
tain
l
y
,
t
h
e
v
is
u
al
q
u
alit
y
o
f
w
ater
m
ar
k
ed
v
id
eo
is
d
eg
r
ad
ed
s
ig
n
i
f
ica
n
tl
y
d
u
e
to
h
u
g
e
d
ata
ar
e
lo
s
t.
Ho
w
e
v
er
t
h
e
w
ater
m
ar
k
ed
i
s
r
ec
o
v
er
ed
ap
p
r
o
x
im
ate
l
y
m
o
r
e
th
a
n
9
5
%
.
T
h
e
p
r
o
p
o
s
ed
s
ch
e
m
e
ac
h
iev
e
d
t
h
e
h
ig
h
r
o
b
u
s
t
n
es
s
ag
a
in
s
t a
ll n
o
i
s
e
in
s
er
tio
n
b
ased
attac
k
a
s
s
h
o
w
n
in
t
h
e
Fi
g
u
r
e
13.
C
o
m
p
r
ess
io
n
i
s
a
n
o
th
er
u
n
i
n
te
n
tio
n
al
attac
k
to
v
id
eo
w
ater
m
ar
k
in
g
s
y
s
te
m
.
As
th
e
v
id
eo
co
n
s
is
t t
h
e
lar
g
e
v
o
l
u
m
in
o
u
s
d
ata
in
Gig
a
b
y
te
s
(
GB
)
o
r
T
er
ab
y
tes
(
T
B
)
,
th
er
e
f
o
r
e
th
e
b
asic
r
eq
u
ir
e
m
e
n
t
is
to
co
m
p
r
es
s
it
b
ef
o
r
e
tr
an
s
m
itti
n
g
v
ia
in
ter
n
et.
T
h
e
w
ater
m
ar
k
ed
v
id
eo
w
it
h
b
it
r
ate
o
f
1
5
2
0
6
k
b
p
s
is
co
m
p
r
ess
ed
w
i
th
MP
E
G
-
2
co
m
p
r
ess
io
n
s
ta
n
d
a
r
d
,
r
ed
u
ce
s
th
e
d
ata
r
ate
b
y
4
0
%
w
i
th
a
b
it
r
ate
o
f
9
8
9
k
b
p
s
.
Ho
w
e
v
er
,
it
i
s
o
b
s
er
v
ed
f
r
o
m
Fi
g
u
r
e
1
3
t
h
at
th
e
w
ater
m
ar
k
is
clea
r
l
y
ex
tr
ac
ted
w
i
th
h
i
g
h
N
C
v
al
u
e.
T
h
e
af
o
r
esaid
attac
k
s
ar
e
ex
p
lo
ited
o
n
th
e
w
ater
m
ar
k
ed
v
id
eo
o
b
j
ec
t
an
d
th
e
o
u
tco
m
e
s
r
ef
lect
s
th
at
t
h
e
p
r
o
p
o
s
ed
s
ch
e
m
e
o
b
tain
ed
an
ex
ce
l
len
t
r
o
b
u
s
tn
e
s
s
r
es
u
lt
ag
ain
s
t
a
lar
g
e
v
a
r
iet
y
o
f
i
n
te
n
tio
n
al
a
n
d
u
n
i
n
te
n
tio
n
a
l
atta
ck
s
as
ill
u
s
tr
ated
i
n
F
ig
u
r
e
1
2
an
d
Fig
u
r
e
1
3
.
4
.
3
.
Co
m
pu
t
a
t
io
na
l C
o
m
plex
it
y
I
t
is
ess
e
n
tial
to
te
s
t
t
h
e
p
r
o
p
o
s
ed
w
ater
m
ar
k
i
n
g
tec
h
n
iq
u
e
u
n
d
er
th
e
r
ea
l
-
ti
m
e
co
n
s
tr
ai
n
t.
I
n
g
e
n
er
al,
b
ase
-
b
an
d
b
ased
w
ater
m
ar
k
i
n
g
s
c
h
e
m
e
h
av
e
li
m
itatio
n
s
to
s
u
p
p
o
r
t
th
e
r
ea
l
-
ti
m
e
r
eq
u
ir
e
m
en
t
as
co
m
p
ar
ed
to
co
m
p
r
es
s
ed
d
o
m
a
in
.
T
h
e
p
r
o
p
o
s
ed
v
id
eo
w
ater
m
ar
k
i
n
g
s
u
g
g
ested
t
h
at
th
e
e
m
b
ed
d
in
g
a
n
d
ex
tr
ac
tio
n
p
r
o
ce
s
s
ar
e
ca
r
r
ied
o
u
t
to
m
ak
e
s
u
r
e
t
h
at
t
h
e
s
elec
ted
b
lo
ck
is
p
lai
n
8
x
8
2
D
-
DC
T
b
lo
ck
an
d
th
e
c
o
m
p
u
tatio
n
o
f
o
n
l
y
AC
co
ef
f
icie
n
t
w
h
i
le
ig
n
o
r
in
g
t
h
e
r
est
co
e
f
f
icien
ts
f
r
o
m
a
p
ar
ticu
lar
b
lo
ck
.
T
h
e
s
i
m
u
lat
io
n
r
esu
lt
h
as
b
ee
n
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
E
C
E
I
SS
N:
2
0
8
8
-
8708
R
o
b
u
s
t V
id
eo
W
a
terma
r
kin
g
S
ch
eme
B
a
s
ed
o
n
I
n
tr
a
C
o
d
in
g
P
r
o
ce
s
s
in
MPE
G
-
2
S
tyle
(
R
a
ke
s
h
A
h
u
ja
)
3341
tak
en
f
o
r
ev
alu
ati
n
g
th
e
ela
p
s
ed
tim
e
o
f
p
r
o
p
o
s
ed
w
o
r
k
.
T
h
e
p
r
o
ce
s
s
in
g
ti
m
e
ap
p
r
ec
iatin
g
th
e
ab
o
v
e
m
en
tio
n
ed
s
tr
ateg
y
i
s
ap
p
r
o
x
im
atel
y
4
.
1
0
an
d
3
.
3
2
s
d
u
r
in
g
e
m
b
ed
d
in
g
an
d
e
x
tr
ac
tio
n
p
r
o
ce
s
s
r
esp
ec
tiv
e
l
y
.
Ma
tlab
v
er
.
R
2
0
1
0
a
in
s
talled
in
co
m
p
u
ter
s
y
s
te
m
w
it
h
co
n
f
ig
u
r
atio
n
I
n
tel®
co
r
e™
Du
o
C
P
U,
1
GB
R
A
M
an
d
3
2
b
it Op
er
atin
g
s
y
s
te
m
o
b
tain
ed
th
e
s
e
co
m
p
u
tin
g
ti
m
es.
Fig
u
r
e
1
2
.
Fra
m
e
co
n
s
id
er
in
g
A
t
tack
s
Fig
u
r
e
1
3
.
T
h
e
ef
f
ec
t o
f
r
o
b
u
s
t
n
es
s
ag
ai
n
s
t d
i
f
f
er
en
t
k
in
d
o
f
n
o
i
s
es a
n
d
co
m
p
r
ess
io
n
attac
k
s
5.
ST
A
T
E
O
F
AR
T
VS P
RO
P
O
SE
D
M
E
T
H
O
D
T
h
e
co
n
ce
r
t
o
f
th
e
p
r
o
p
o
s
ed
m
et
h
o
d
is
co
m
p
ar
ed
w
it
h
ex
i
s
ti
n
g
s
c
h
e
m
es
w
h
ich
ar
e
b
ased
o
n
co
m
p
r
es
s
ed
d
o
m
ai
n
co
n
v
e
y
ed
in
co
n
te
m
p
o
r
ar
y
y
ea
r
s
.
Mi
n
g
J
ian
g
et
a
l.
[
9
]
p
r
o
p
o
s
ed
th
e
v
id
eo
w
ater
m
ar
k
i
n
g
alg
o
r
ith
m
to
p
r
o
tect
th
e
co
p
y
r
ig
h
t
o
f
th
e
v
id
eo
o
b
j
ec
ts
.
DC
co
ef
f
icie
n
t
f
r
o
m
o
n
e
8
x
8
DC
T
b
lo
ck
i
s
r
esp
o
n
s
ib
le
f
o
r
in
s
er
tin
g
o
n
e
w
ater
m
ar
k
b
it
f
o
r
e
m
b
ed
d
in
g
p
u
r
p
o
s
e.
T
h
e
in
s
er
tio
n
p
r
o
ce
s
s
i
s
d
ep
en
d
s
u
p
o
n
th
e
DC
co
ef
f
icie
n
t
is
o
d
d
/ev
en
to
in
s
er
t
1
/
0
in
to
it.
I
n
th
is
w
a
y
all
t
h
e
DC
co
ef
f
ic
ien
ts
ar
e
u
ti
lize
f
o
r
e
m
b
ed
d
in
g
p
u
r
p
o
s
e.
Yo
n
g
et
al.
[
1
4
]
d
escr
ib
ed
an
ad
ap
ti
v
e
v
id
eo
w
ate
r
m
ar
k
in
g
p
r
o
ce
s
s
b
ased
o
n
h
u
m
a
n
v
is
u
al
s
y
s
te
m
(
HV
S)
an
d
MP
E
G
-
4
v
id
eo
co
m
p
r
ess
io
n
t
h
eo
r
y
.
L
o
w
f
r
eq
u
e
n
c
y
D
C
T
co
ef
f
icien
t
s
ar
e
u
tili
ze
d
to
em
b
ed
th
e
w
ater
m
ar
k
.
MP
E
G
-
4
v
id
eo
co
m
p
r
ess
io
n
is
d
esig
n
ed
f
o
r
th
o
s
e
ap
p
licatio
n
s
in
w
h
ich
lo
w
b
an
d
w
id
t
h
ar
e
r
eq
u
ir
ed
to
tr
a
n
s
m
it
t
h
e
d
ata.
D.
B
ad
r
in
ath
e
t
al.
[
1
5
]
s
u
g
g
e
s
ted
th
e
d
u
al
v
id
eo
w
ater
m
ar
k
i
n
g
s
ch
e
m
e
b
ased
o
n
MP
E
G
-
2
c
o
m
p
r
es
s
io
n
s
ta
n
d
ar
d
.
T
h
e
p
r
o
ce
s
s
o
f
e
m
b
ed
d
in
g
t
h
e
w
at
er
m
ar
k
i
s
b
ased
o
n
ex
p
lo
itin
g
th
e
I
-
f
r
a
m
es
w
h
ic
h
is
f
u
r
t
h
er
u
s
ed
to
g
en
er
ate
th
e
DC
T
im
a
g
e.
T
h
e
r
esu
ltan
t
DC
T
im
a
g
e
is
ad
d
ed
w
it
h
t
h
e
D
C
T
o
f
w
ei
g
h
ted
w
a
ter
m
ar
k
i
n
f
o
r
m
atio
n
.
T
h
e
r
o
b
u
s
t
n
es
s
o
f
t
h
e
p
r
o
p
o
s
ed
s
ch
em
e
is
co
m
p
ar
ed
w
it
h
alr
ea
d
y
d
eliv
er
ed
tec
h
n
iq
u
e
s
f
o
r
th
e
s
elec
ted
attac
k
s
a
s
te
m
p
o
r
al
s
y
n
c
h
r
o
n
izatio
n
at
tac
k
s
in
cl
u
d
i
n
g
f
r
a
m
e
in
s
er
tio
n
,
f
r
a
m
e
d
eletio
n
,
f
r
a
m
e
s
w
ap
p
in
g
a
n
d
f
r
a
m
e
a
v
er
ag
in
g
,
s
i
g
n
al
p
r
o
ce
s
s
i
n
g
attac
k
s
co
v
er
in
g
v
ar
io
u
s
n
o
is
e
attac
k
s
as
s
alt
a
n
d
p
ep
p
er
,
s
p
ec
k
le,
Gau
s
s
ia
n
n
o
is
e
an
d
P
o
is
s
o
n
n
o
is
e
attac
k
s
,
m
ed
ian
a
n
d
w
ie
n
er
f
ilter
i
n
g
attac
k
s
a
n
d
r
ec
o
m
p
r
ess
io
n
a
ttack
s
.
I
t
is
o
b
s
er
v
ed
f
r
o
m
T
ab
le.
2
,
th
e
p
r
esen
ted
s
ch
e
m
e
o
f
f
er
s
b
etter
r
o
b
u
s
tn
es
s
co
m
p
ar
ed
to
o
th
er
s
u
g
g
ested
tec
h
n
iq
u
es.
I
n
a
d
d
itio
n
to
th
e
b
etter
r
o
b
u
s
t
n
e
s
s
ac
h
iev
ed
s
o
f
ar
co
m
p
ar
i
n
g
w
it
h
t
h
e
e
x
is
t
in
g
m
et
h
o
d
s
,
o
n
e
m
aj
o
r
p
o
s
itiv
e
a
s
p
ec
t
o
f
t
h
e
p
r
o
p
o
s
ed
ap
p
r
o
ac
h
is
th
a
t
t
h
e
s
c
h
e
m
e
o
f
f
er
ed
g
o
o
d
r
o
b
u
s
tn
e
s
s
r
es
u
lt
s
ag
ai
n
s
t
u
n
i
n
te
n
tio
n
al
co
m
p
r
ess
io
n
a
ttack
.
T
h
e
s
ize
o
f
w
at
er
m
ar
k
ed
v
id
eo
a
n
d
co
m
p
r
es
s
io
n
at
tack
ed
w
ater
m
ar
k
ed
v
id
eo
co
n
s
id
er
in
g
‘
Ak
i
y
o
’
v
id
eo
s
eq
u
e
n
ce
is
1
5
.
2
0
6
MB
an
d
2
.
3
5
M
B
r
esp
ec
tiv
el
y
.
I
t
r
e
f
lects
t
h
at
e
v
en
8
5
%
o
f
t
h
e
d
ata
is
lo
s
t
d
u
r
i
n
g
r
e
-
co
m
p
r
e
s
s
io
n
p
r
o
ce
s
s
,
s
ti
ll
t
h
e
w
ater
m
ar
k
is
r
ec
o
v
er
ed
alm
o
s
t
1
0
0
%
as
s
h
o
w
n
in
t
h
e
Fi
g
u
r
e
1
3
.
I
t
is
b
ec
au
s
e
o
f
c
h
o
o
s
in
g
o
n
l
y
t
h
e
s
m
o
o
t
h
D
C
T
b
lo
ck
s
,
n
o
t a
ll,
w
h
ic
h
is
t
h
e
k
e
y
id
ea
o
f
th
e
p
r
o
p
o
s
ed
m
e
th
o
d
.
Evaluation Warning : The document was created with Spire.PDF for Python.