Wireless data technologies reference handbook phần 3 pptx

... detailed overview of video compression technologies the reader is referred to Symes (20 03) . 3. 2 ARTIFACTS 3. 2.1 Compression Artifacts As pointed out in section 3. 1.4, the compression algorithms used ... and extent of the pattern (see Figure 3. 3(b)). Recent codecs such as H.264 employ a deblocking filter to reduce the visibility of this artifact. Figure 3. 3 Illustration of typical...

Ngày tải lên: 09/08/2014, 19:21

... PROTOCOLS 39 TDMA FRAME n FDMA FDMA 1 23 1 231 24 Channel 25 MHz 25 MHz Downlink MS Tx 890 MHz 935 MHz Uplink MS Tx 915 MHz 1 23 1 231 24 200 kHz TDMA FRAME 4.615 ms TN 7 TN 6 TN 5 TN 4 TN 3 TN 2 TN ... signaling used for Wireless Data Technologies. Vern A. Dubendorf  20 03 John Wiley & Sons, Ltd ISBN: 0-470-84949-5 36 GSM 4.2.4.4 The Authentication Center (AuC) A protecte...

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... 5.8 GHz depending on application. Wireless Data Technologies. Vern A. Dubendorf  20 03 John Wiley & Sons, Ltd ISBN: 0-470-84949-5 LMDS 185 networks such as T3 connectivity with a 45 Mbps throughput. ... does have some limitations. Wireless broadband uses radio spectrum, which Wireless Data Technologies. Vern A. Dubendorf  20 03 John Wiley & Sons, Ltd ISBN: 0-470-84949-...

Ngày tải lên: 09/08/2014, 19:22

... see WAP Wireless Guru xix Wireless Local Area Networks, see WLAN Wireless Personal Area Network, see WPAN wireless technologies xix Wireless Transport Layer Security, see WTLS WLAN, see Wireless ... Access/Collision Detect, see CSMA/CD common control channels (CCCH) 43 Wireless Data Technologies. Vern A. Dubendorf  20 03 John Wiley & Sons, Ltd ISBN: 0-470-84949-5 Glo...

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... Sequences 131 6.2.2 Prediction Performance 131 6 .3 Image Appeal 133 6 .3. 1 Background 133 6 .3. 2 Quantifying Image Appeal 134 6 .3. 3 Results with VQEG Data 137 6 .3. 4 Test Sequences 139 6 .3. 5 Subjective ... quality assessment. 3 Video Quality 35 3. 1 Video Coding and Compression 36 3. 1.1 Color Coding 36 3. 1.2 Interlacing 37 3. 1 .3 Compression Methods 38 3. 1....

Ngày tải lên: 09/08/2014, 19:21

... so-called 3: 2 pulldown, which denotes the standard way to convert progressive film sequences shot at 24 frames per second to interlaced video at 60 fields per second. 3. 3 VISUAL QUALITY 3. 3.1 Viewing ... traditional CRT screens, LCDs, plasma displays, front 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] HDT...

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... sequences. While it still requires the reference as input, the cognitive emulator was shown to improve the predictions of subjective SSCQE MOS data. 3. 5 METRIC EVALUATION 3. 5.1 Performance Attributes Quality ... these sequences were collected in large-scale experiments using the DSCQS method (see section 3. 3 .3) . The VQEG test sequences and subjective experiments are described in mo...

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... Y 0 C 0 B C 0 R as follows (Poynton, 1996): R 0 G 0 B 0 2 4 3 5 ¼ 1 219 10 1 :37 1 1 À0 :33 6 À0:698 11: 732 0 2 4 3 5 Á Y 0 C 0 B C 0 R 2 4 3 5 À 16 128 128 2 4 3 5 0 @ 1 A : ð4:19Þ [ ] G’ B’ R’ G B R Y Z X C’ C’ Y’ M [ ... Filter weights Level 0 1 2 3 4 W-B, LP 5.0 19.2 139 .5 478.6 496.5 W-B, BP 112.8 141.0 179.4 205.7 120.0 R-G, LP 154.2 35 4.0 404.0 184.6 27.0 B-Y, LP 125.6 3...

Ngày tải lên: 09/08/2014, 19:21

... ratings. As 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) ... 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.2 63 7...

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... 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 1 Scene 2 Scene 3 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 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...

Ngày tải lên: 09/08/2014, 19:21