Wireless data technologies reference handbook phần 1 potx
Wireless data technologies reference handbook phần 1 potx
... 10 8
5.2 .1 Test Sequences 10 8
5.2.2 Subjective Experiments 10 9
5.2.3 Prediction Performance 11 1
5.2.4 Discussion 11 5
5.3 Component Analysis 11 7
5.3 .1 Dissecting the PDM 11 7
5.3.2 Color Space 11 8
5.3.3 ... Sequences 12 7
6 .1. 3 Subjective Experiments 12 8
6 .1. 4 Prediction Performance 12 9
6.2 Object Segmentation 12 9
6.2 .1 Test Sequences 13 1
6.2.2 Prediction Perfo...
Wireless data technologies reference handbook phần 4 potx
... weighting
Zhang and Wandell (19 96) IQ Opp.
L
1= 3
Fourier
F
E Spatial CIELAB extension
Tong et al. (19 99)
VQ Opp.
L
1= 3
Fourier
F
L
1
R Spatio-temporal CIELAB extension
Daly (19 93)
IQ Lum. yes mod. ... Lum.
L
0:33
F
L
2
R
Faugeras (19 79)
IQ, IC
AC
1
C
2
log L
F
L
2
E
Lukas and Budrikis (19 82) VQ Lum.
yes F C
L
p
R
Girod (19 89)
VQ Lum.
yes F C
L
2
, L
/
Integral spatio-temporal mo...
Wireless data technologies reference handbook phần 1 pps
... Certificates 19 2
11 .6 Wireless Transport Layer Security (WTLS) 19 3
11 .6 .1 WTLS 19 3
11 .6.2 WAP 19 5
11 .6.3 WEP 19 5
11 .6.4 WPKI 19 9
11 .7 Authentication and Integrity 2 01
11. 8 Security Threats 202
11 .8 .1 Denial-of-Service ... (PKI) 18 8
11 .3 What is a PKI? 18 9
11 .4 PKI and Other Security Methods 19 0
11 .4 .1 Username/Password 19 0
11 .4.2 Biometrics...
Wireless data technologies reference handbook phần 5 potx
... alphabet soup of
802 .11 standards.
8.5 .1. 1 802 .11 b
802 .11 b is the most popular wireless LAN standard. It operates in the unlicensed
2.4-GHz band and provides up to 11 Mbps of data. The data rate is dynamically
negotiable ... 802 .11 a is lower than 802 .11 b, but it does have an advantage over
802 .11 b in terms of speed and capacity.
8.5 .1. 3 802 .11 g
802 .11 g is the high-spe...
Wireless data technologies reference handbook phần 10 pps
... multiframes 47
5
52-multiframe 47
8
802 .11 81
802 .11 a 81
802 .11 b 81
802 .15 10 2
802 .16 15 8
802.3 81
A
access grant channel (AGCH) 43
AiroPeek 14 1
AirSnort 14 2
AJ
Anti-Jam 9
ALOHANET 5
AMPS
Advanced ... INDEX
WEP 19 5
Wired Equivalent Privacy 3
WEPcrack 14 2
WinDump 14 1
W-INFOSEC 18 7, 18 8, 19 0, 19 2, 19 4,
19 6, 19 8, 200, 202, 204
Wired Equivalent Privacy, see...
Wireless data technologies reference handbook phần 3 pptx
... QUALITY
10
2
10
1
10
0
10
1
10
1
10
1
10
0
10
1
10
1
10
0
10
1
10
0
10
1
10
1
10
0
10
1
10
–2
Spatial frequency [cpd]
Temporal frequency [Hz]
(a) Achromatic CSF
(b) Chromatic CSF
Contrast sensitivity
10
2
10
1
10
0
10
1
10
–2
Contrast ... band-pass mechanisms have been discovered (Foster et al., 19 85),
10
0
10
1
10
2
10
–2
10
1
10
0
Temporal...
Wireless data technologies reference handbook phần 5 pps
... equation (4 .11 ). The PLog
wavelet is defined as follows:
ð
~
xxÞ¼
1
~
~
xx
ffiffiffi
p
; ð4 :15 Þ
where
~
ðx; yÞ¼
ð 1
2
1
ð 1 !
@
2
@x
2
þ
@
2
@y
2
e
À
x
2
þy
2
2
: ð4 :16 Þ
The ... correlation
better
–2 0 2 4 6
0.5
0.6
0.7
0.8
0.9
1
1 .1
1.2
1. 3
1. 4
Offset
Slope
(a) Correlations
(b) Linear regresssion parameters
Figure 3 .11 Inter-lab DMOS correlations (a)...
Wireless data technologies reference handbook phần 6 ppt
... Filter weights
Level 0 1 2 3 4
W-B, LP 5.0 19 .2 13 9.5 478.6 496.5
W-B, BP 11 2.8 14 1.0 17 9.4 205.7 12 0.0
R-G, LP 15 4.2 354.0 404.0 18 4.6 27.0
B-Y, LP 12 5.6 332.7 3 81. 4 13 1.5 28.6
PERCEPTUAL DISTORTION ... parameters
bk pq
W-B 6.968 0.29778 2 .11 58 2
R-G 21. 904 0 .11 379 2.3447 2
B-Y 13 .035 0.07 712 2.2788 2
98 MODELS AND METRICS
10
1
10
0
10
1
–45
–40
–35
–30...
Wireless data technologies reference handbook phần 7 pdf
... images,
Figure 5 .1 Original test image and two examples of distorted versions.
Table 5 .1 Coding noise components and signs for all 20 test conditions
12 345678 910 111 213 1 415 1 617 1 819 20
Y þ þ þ þþþ ... Mb/s
11 MPEG-2 3 Mb/s Transmission errors
12 MPEG-2 4.5 Mb/s Transmission errors
13 MPEG-2 2 Mb/s 3/4 resolution
14 MPEG-2 2 Mb/s 3/4 horizontal resolution
15 H.263 768 kb/s 1...
Wireless data technologies reference handbook phần 8 ppt
... 9
Condition
DMOS
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
0
10
20
30
40
50
60
70
80
Condition 1
Condition ... 12 7
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5...
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