Báo cáo hóa học: " Research Article Efficient MPEG-2 to H 264/AVC Transcoding of Intra-Coded Video" docx

... appr.II, both in forward and backward pass. However, it is shown that neither the error of appr.I nor that of appr.II appears to grow over the length of run. To examine the robustness of inference ... w (r) 0 , , w (r) L −1 , v) to denote the rth path of length L from u to v,wherew (r) is the intermediate nodes. Then the prior probability of object taking the rth path from...

Ngày tải lên: 21/06/2014, 05:20

... of the echoes, the dispersivity of the spring bends the echoed impulses into chirps. Broadly speaking, the impulse response of a spring can be thought of as two series of these dispersive echoes ... downsampling C lf Stretch factor k 2kk/2 All-pass chain coefficient a lf −a lf −a lf Chain length M low M low /2 M low /2 C hf Stretch factor 1 2 n/a All-pass chain coefficient a hf a hf n/a...

Ngày tải lên: 21/06/2014, 05:20

... branches, with frequency responses given as H ti = F N h ti and H tq = F N h tq ,whereh ti and h tq are the impulse response of the respective I and Q branch mismatched filters. Both h ti and h tq are ... general, we consider the coherence bandwidth of the channel to be small enough (or channel dispersion to be long enough) so that the channel response on the desired tone...

Ngày tải lên: 21/06/2014, 08:20

... than the pathloss; however, the assigned bandwidth degrades with the “rest” of the pathloss law. So in total the throughputs again will degrade with pathloss, with the slope being in between the upper ... bandwidth degrades with the pathloss, copmared with (14) unless the P0s are rather small. So the throughputs degrade with the pathloss (which is a little steeper than the upper case due t...

Ngày tải lên: 21/06/2014, 11:20

... coordinates of its one-hop neighbors allows it to determine which one has the shortest distance to the center of the wireless network area. The node with the shortest distance is selected as a cluster head ... 30 Number of nodes DMHBGKA-160 DMHBGKA-224 GDH-1024 GDH-2048 DH-1024 DH-2048 Figure 13: Group key synchronization time on DMHBGKA, GDH, and DH. DMHBGKA-160 DMHBGKA-224 GDH-102...

Ngày tải lên: 21/06/2014, 11:20

... on the built map, the optimum route among the nodes is generated. The main obstacle this protocol has to skip is the high number of messages to be exchanged among nodes. However, thanks to these ... through chains of certificates which are issued by the nodes themselves. Such a scheme is based on the information stored by each node and the trust relationship a mong neighbour nodes. I...

Ngày tải lên: 21/06/2014, 11:20

... greatly lower than that of VBF. For example, when the number of nodes is 1000, the energy tax of HH-VBF is 226 J/pkt, while the energy overhead of VBF is as high as 4919 J/pkt. This is mainly because the ... protocol, which adapts the vector-based approach at every hop. We evaluate the performance of VBF and HH-VBF through extensive simulations. The simulation results show that VBF...

Ngày tải lên: 21/06/2014, 17:20

... systems has not been highlighted. The design of such a protocol is not a trivial problem, due to the overhead associated with the feedback information. In this paper, a novel protocol is proposed to ... The value of −65 dBm is selected as the threshold level for OSS, because this level provides the best throughput performance among the 8 levels in Ta bl e 2. Figure 8 shows the changes...

Ngày tải lên: 21/06/2014, 17:20

... be R. Then the expected throughput of the system is obtained by taking ensemble average of R over H k s, that is, R Ave = E H 1 , ,H K {R}. Throughout the paper, the terms system throughput and sum ... which maximizes the average sum rate) while each of the remaining M − L data streams is assigned to a user with the highest ZF receiver postprocessing SNR. We have shown that in th...

Ngày tải lên: 21/06/2014, 17:20

... priority. With reference to Figure 20, the PS is used to determine which neighbours to the UPs have not been put into the other queue, UPs of the same label and LPs. 5. Example for the Arrowing Architecture This ... highlighted with circles. (c) shows pixels where the steepest descending paths and minima have been labelled. The labels used for the direction of the steepest descendin...

Ngày tải lên: 21/06/2014, 20:20