Wireless data technologies reference handbook phần 4 docx
Wireless data technologies reference handbook phần 4 docx
... Mb/s
TD-
SCDMA
1
× EV-DV
ph 2
4. 8 Mb/s
1× EV-DO
ph 1
2 .4 Mb/s
cdma 2000
1×
144 , 307 kb/s
HiperLAN
2
54 Mb/s
IEEE80
2.11a
54 Mb/s
Harmonised
HL2-IEEE
802.11a
High data
rate WLAN
100 Mb/s
MAN
100 ... UMTS
MSS
Dwn
UMTS
MSS FPLMTS MSS
1700 1800
246 8
0000
1900
246 8
0000
2000
246 8
0000
2100
246 8
0000
2200
MSS = Mobile
Satellite System
20 40 6 8
00
20 40 6 8
00
ADBEFC
Units
PH...
Wireless data technologies reference handbook phần 4 potx
... and back
2 3 4 5 6 7 8
5
10
15
20
25
30
D/H
Visual angle [deg]
2 3 4 5 6 7 8
5
10
15
20
25
30
35
40
D/H
Resolution [cpd]
HDTV (1080 lines)
HDTV (720 lines)
PAL (576 lines)
NTSC (48 6 lines)
CIF ... (1998)
IQ Opp.
steerable pyr.
W C
ð’Þ
L
2
R See Sections 4. 2 and 5.1
Winkler (1999b)
VQ Opp.
steerable pyr.
W C
ð’Þ
L
2
,L
4
R See Sections 4. 2 and 5.2 (VQEG)
Winkler (2000)
VQ vari...
Wireless data technologies reference handbook phần 3 docx
... location data
CM
( 04. 08)
MM
( 04. 08)
RR
( 04. 08)
LAP-Dm
( 04. 05/08)
RADIO
( 04. 04)
RR'
( 04. 08)
RR'
( 04. 08)
LAP-Dm
( 04. 05/06)
BTSM
(08.58)
LAP-D
(08.58)
RADIO
( 04. 04)
64 kbit/s
(08. 54)
BTSM
(08.58)
LAP-D
(08.56)
64 ... per transaction connection)
TCS
= 51 TDMA Frames
42 46 47 48 49 5 045 444 3
BCH MULTIFRAME 012 345 678910111213 141 5
67
Encrypted
Normal...
Wireless data technologies reference handbook phần 10 pps
... 10
Bluetooth 147 , 149 , 151, 153, 155, 157
broadcast channels (BCH) 42
broadcast control channel (BCCH) 43
BS 47
BSC 47
BSS 47
BTS 47
Burst Formats 44
C
Cape Cod, Massachusetts 4
Collision Sense ... Access/Collision
Detect, see CSMA/CD
common control channels (CCCH) 43
Wireless Data Technologies. Vern A. Dubendorf
2003 John Wiley & Sons, Ltd ISBN: 0 -47 0- 849 49-...
Wireless data technologies reference handbook phần 1 potx
... Subjective Quality Factors 48
3.3.3 Testing Procedures 51
3 .4 Quality Metrics 54
3 .4. 1 Pixel-based Metrics 54
3 .4. 2 Single-channel Models 56
3 .4. 3 Multi-channel Models 58
3 .4. 4 Specialized Metrics ... Color Space Conversion 84
4.2.3 Perceptual Decomposition 86
4. 2 .4 Contrast Gain Control 91
4. 2.5 Detection and Pooling 94
4.2.6 Parameter Fitting 95
4. 2.7 Demonstration 9...
Wireless data technologies reference handbook phần 3 pptx
... between short and medium wavelengths.
40 0 45 0 500 550 600 650 700
–1
–0.8
–0.6
–0 .4
–0.2
0
0.2
0 .4
0.6
0.8
1
Wavelength [nm]
Sensitivity
W–B
R–G
B–Y
Figure 2. 14 Normalized spectral sensitivities ... permits a significant data reduction of the
color difference signals. In digital video, this is achieved by chroma sub-
sampling. The notation commonly used is as follows:
4: 4 :4 d...
Wireless data technologies reference handbook phần 5 pps
... and Metrics Stefan Winkler
# 2005 John Wiley & Sons, Ltd ISBN: 0 -47 0-0 240 4-6
4. 1 .4 Filter Design
As discussed in section 4. 1.3, the computation of a robust isotropic contrast
measure requires ... 94% with MOS, thus significantly
outperforming PSNR, which had a correlation of about 70%. The results of
this VQEG test are the basis for ITU-T Rec. J. 144 (20 04) and ITU-R Rec.
BT.168...
Wireless data technologies reference handbook phần 6 ppt
... Filter weights
Level 0 1 2 3 4
W-B, LP 5.0 19.2 139.5 47 8.6 49 6.5
W-B, BP 112.8 141 .0 179 .4 205.7 120.0
R-G, LP 1 54. 2 3 54. 0 40 4.0 1 84. 6 27.0
B-Y, LP 125.6 332.7 381 .4 131.5 28.6
PERCEPTUAL DISTORTION ... 2.2.1) are computed as follows (Hunt, 1995):
L
M
S
2
4
3
5
¼
0: 240 0:8 54 À0: 044
À0:389 1:160 0:085
À0:001 0:002 0:573
2
4
3
5
Á
X
Y
Z
2
4
3
5
: 4: 21Þ
The LMS va...
Wireless data technologies reference handbook phần 7 pdf
... discussed in section 3.3.2, perceived
10 0 10 20 30 40 50 60 70
0
10
20
30
40
50
60
Subjective DMOS
Occurrences
1 2 3 4 5 6 7 8
0
5
10
15
20
25
30
35
40
45
DMOS 95% confidence interval
Occurrences
(a) ... PAL/NTSC
9 MPEG-2 3 Mb/s
10 MPEG-2 4. 5 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...
Wireless data technologies reference handbook phần 8 ppt
... http://www.mpeg.org/home/$tristan/MPEG/MSSG/
BLOCKING ARTIFACTS 127
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
6
7
8
0
10
20
30
40
50
60
70
80
Scene ... 3
Scene 4
Scene 5
Scene 6
Scene 7
Scene 8
Scene 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...
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