Wireless data technologies reference handbook phần 10 pps

... Privacy, see WEP Wireless Application Protocol, see WAP Wireless Guru xix Wireless Local Area Networks, see WLAN Wireless Personal Area Network, see WPAN wireless technologies xix Wireless Transport ... identifier w.r.t. with respect to WAN wide area network WAP wireless application protocol WLAN wireless local area network WPAN wireless personal area network WUG wireless...

Ngày tải lên: 09/08/2014, 19:21

... video 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 ... ð3:5Þ where " xx and " yy are the means of the respective data sets. This assumes a linear relation between the data sets. If this is not the case, nonlinear correlation coefficie...

Ngày tải lên: 09/08/2014, 19:21

... the compressed bitstream, or even none at all. These reduced -reference or no -reference metrics would be much more versatile than full -reference metrics from an application point of view. However, ... The sharpness and colorfulness ratings are 0 10 20 30 40 50 60 70 80 90 0 10 20 30 40 50 60 70 80 PDM prediction Subjective DMOS 20 25 30 35 40 45 0 10 20 30 40 50 60 70 80 PSNR [dB]...

Ngày tải lên: 09/08/2014, 19:21

... Salisbury Plain. Wireless Data Technologies. Vern A. Dubendorf  2003 John Wiley & Sons, Ltd ISBN: 0-470-84949-5 Wireless Data Technologies Vern A. Dubendorf IEEE, Massachusetts Health Data Consortium ... 207 12.3.3SeparationofVoiceandData 208 12.3.4 Stand-alone System 208 13 What Does the Future Hold for Wireless Technologies? 209 13.1 COPS 209 13.2 Will Wireless LANS H...

Ngày tải lên: 09/08/2014, 19:22

... Demonstration 99 4.3 Summary 102 5 Metric Evaluation 103 5.1 Still Images 103 5.1.1 Test Images 103 5.1.2 Subjective Experiments 104 5.1.3 Prediction Performance 107 vi CONTENTS Acronyms A word ... Metrics Stefan Winkler Genista Corporation, Montreux, Switzerland 5.2 Video 108 5.2.1 Test Sequences 108 5.2.2 Subjective Experiments 109 5.2.3 Prediction Performance 111 5.2.4 Di...

Ngày tải lên: 09/08/2014, 19:21

... is also more meaningful perceptually. 36 VIDEO 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) ... that low- pass and band-pass mechanisms have been discovered (Foster et al., 1985), 10 0 10 1 10 2 10 –2 10 –1 10 0 Temporal frequency [Hz] Normali...

Ngày tải lên: 09/08/2014, 19:21

... Viewers are shown multiple sequence pairs consisting of a reference and a ‘test’ sequence, which are rather short (typically 10 seconds). The reference and test sequence are presented twice in alternating ... DSCQS method, the reference is always shown before the test sequence, and A B A B Vote Excellent Good Fair Poor Bad AB 100 0 (a) Presentation sequence (b) Rating scale Figure 3.7...

Ngày tải lên: 09/08/2014, 19:21

... the orientation dimension as a first approximation to channel interactions. 10 –3 10 –3 10 –2 10 –1 10 0 10 –2 10 –1 10 0 a s Figure 4.12 Illustration of contrast gain control as given by equation ... no pooling. Solid line: p ¼ 2:4, b 2 ¼ 10 À4 . Dashed lines from left to right: p ¼ 2:0; 2:2; 2:6; 2:8. Dotted lines from left to right: b 2 ¼ 10 À5 ; 10 À3 ; 10 À2 ; 10...

Ngày tải lên: 09/08/2014, 19:21

... the PDM performs worst for the H.263 sequences of the test. 10 0 10 20 30 40 50 60 70 80 90 10 0 10 20 30 40 50 60 70 DMOS DMOS Figure 5 .10 Example of inter-lab scatter plot of perceived quality. ... 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%...

Ngày tải lên: 09/08/2014, 19:21

... condition in Figure 6 .10( b) shows that condition 5 (MPEG-2 at 2 Mb/s) exhibits the (a) DMOS histogram (b) Histogram of confidence intervals 0 10 20 30 40 50 60 70 80 0 2 4 6 8 10 12 Subjective DMOS Occurrences 3 ... the VQEG data. Additional subjective experiments with unnormalized test sequences are necessary, which are described in the following. –0.08 –0.06 –0.04 –0.02 0 0.02 0.04 0...

Ngày tải lên: 09/08/2014, 19:21