Báo cáo hóa học: " Optimized H 264/AVC-Based Bit Stream Switching for Mobile Video Streaming" docx

... 10.1155/ASP/2006/91797 Optimized H. 264/AVC-Based Bit Stream Switching for Mobile Video Streaming Thomas Stockhammer, 1 G ¨ unther Liebl, 2 and Michael Walter 2 1 Nomor Research GmbH, Tannenweg 25, ... trans- mit this data. We believe that this setup is quite suitable to show the potential perfor mance gains achievable with stream switching. Figure 10 shows the PSNR versu...

Ngày tải lên: 22/06/2014, 23:20

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Ngày tải lên: 21/06/2014, 01:20

... the model, have difficulties in attaining the highest-quality levels, and thus require much higher bit rates than waveform coders when aiming at the high audio quality. In contrast, waveform coders ... at each layer: the higher the quality, the more sensitive human hearing is to spatial arti- facts and consequently, more bits are required for the spatial parameters when pursuing the highest...

Ngày tải lên: 22/06/2014, 19:20

... possible channel coding rate for each θ i in (30). Notice that above payoff function for the quasishare auction is similar to the soul of “Pricing Anarchy,” in which the users pay the tax for their ... 6,we show the average PSNR gain when we compare the proposed scheme and the CBR scheme for all three video sets. As we can see, the proposed scheme can have PSNR gain between 0.8 dB an...

Ngày tải lên: 21/06/2014, 20:20

... increases, the need for bins decreases. However, the sensing time is far greater for fine mode sensing than in coarse mode sensing. Hence, the algorithm gives the priority to reducing α over β which has ... the same car rier, if placed sufficiently near each other, cooperate to find the presence of the primary user. The first user to detect the presence of the primary user informs the others t...

Ngày tải lên: 21/06/2014, 20:20

... inputs. Output1 Remaining power Too low Low Normal High Too high High Too low Low High Too high Too high Normal Too low Low Normal High High Low Too low Too low Low Low Normal Delay 1 0 Buffer ... the “News” video clip, with the default scheme and the FLC power-aware scheme. of course, a DAB is not a feature of the Bluetooth standard. Thechannelparameter,a, was varied in the tests to show .....

Ngày tải lên: 21/06/2014, 22:20

... based on the hash to generate the best SI block from the previous frame. In this scheme, the encoder is no longer an intraframe coder because of the hash store. The hash bits do help in motion ... show that a large improvement of performance has been achieved by the proposed approach, compared to the-state-of-the-art DVC. The proposed approach achieves better RD performances than TDWZ for ....

Ngày tải lên: 22/06/2014, 00:20

... (lower and higher than the current rate). At the end of a decision window, the transmitter computes the different throughputs and a switch is made to the rate that provides the highest throughput. ... performance depends on the content, the video bit rate, the concealment algorithm, and the packet length (amongst others). A switching scheme using PER thresholds was presented by the autho...

Ngày tải lên: 22/06/2014, 01:20

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Ngày tải lên: 22/06/2014, 19:20

... obtain the mask for the I-frame that exhibits the approximate position of the objects. This process leads to a rough estimate of the mask for the I-frame which will approximately locate the objects ... according to the principles of the Weber-Fechner law, which implies that the gray-level differ- ence which the human eye is able to perceive is not constant but depends on the region intensi...

Ngày tải lên: 22/06/2014, 19:20