odd even frame multiple description coding for scalable h 264 avc
Báo cáo hóa học: " Research Article Distributed Temporal Multiple Description Coding for Robust Video Transmission" docx
Ngày tải lên :
22/06/2014, 19:20
... Description LH LH H H H H H 10 11 12 13 14 15 16 17 H H H LH LH LLL Description LLH Figure 2: Haar F-TMDC: odd/ even temporal splitting and twoband Haar MCTF LLL LLH Description LH H LH H H H H 10 11 12 ... LH LH H H H H H H H H 10 11 12 13 14 15 16 17 H H H H LH LH LL Description Figure 4: 3B F-TMDC: odd and even frames are separated and a 3-band MCTF is then applied in each description LL Description ... Description LH H LH H H H H H H H 10 11 12 13 14 15 16 17 H H LH Description higher performance for the central decoder At the side decoders, due to the greater temporal distance between frames used for...
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distributed multiple description coding principles, algorithms and systems
Ngày tải lên :
30/05/2014, 23:40
... code which are called key frames; its coding and decoding adopt the traditional intra ways, such as H. 264 coding technology The frames between the key frames are called WZ frames; these frames ... al [37] put forward the gradually refined method for side information in the decoding end; it does not need the extra Hash bit and uses the information of the current frame which has been partially ... Distributed Multiple Description Coding Huihui Bai • Anhong Wang • Yao Zhao Jeng-Shyang Pan • Ajith Abraham Distributed Multiple Description Coding Principles, Algorithms and Systems 123 Dr Huihui Bai...
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Báo cáo hóa học: "Research Article Multiple Description Coding with Side Information: Practical Scheme and Iterative Decoding" ppt
Ngày tải lên :
21/06/2014, 20:20
... considered here where both descriptions are SW encoded and decoded with the help of extra SI Y correlated with the input source, the two regions overlap For the central decoder, in which both descriptions ... the inverse quantization step (see (13)) This explains the fact that when the CSNR is low, the SNR performance of the side decoder without the SI for d = is slightly better than the SNR with ... the two curves that correspond to the MDWZC schemes for d = and d = cross each other at the highest CSNR values The same effect is observed with the proposed scheme: when d becomes larger, the...
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Báo cáo hóa học: " Research Article Low-Complexity Multiple Description Coding of Video Based on 3D Block Transforms" ppt
Ngày tải lên :
22/06/2014, 22:20
... manner shown in Figure 2(b), and entropy-coded One part together with the shaper forms Description 1, while the second part combined again with the shaper forms Description Thus, each description ... is seen from (10) that the upper limit for redundancy is R/2, which is obtained for p = That means that all the bits are allocated to the shaper, which is duplicated in both descriptions (4) subject ... Variable-length encoding is implemented as a standard Huffman encoder similar to the one in H. 263 [6] The codebook has the size 100 and is calculated for the two tuples which are the output of RL-coding...
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Báo cáo hóa học: " Research Article Multiple Description Coding with Redundant Expansions and Application to Image Communications" pot
Ngày tải lên :
22/06/2014, 22:20
... 20], where the authors used the orthogonalized version of matching pursuit However, the problem with these solutions is that they not exploit the redundancy inherently offered by the transform, ... and they give an insight in the tradeoff between the side and central distortions for the two schemes that perform best Another related work is presented in [16], where a scheme for multiple description ... but when the actual channel characteristics are somewhat different (as it may happen in practical scenarios when channel status changes) Figure shows the performance of both schemes optimized for...
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Báo cáo hóa học: " Research Article Improved Intra-coding Methods for H.264/AVC" docx
Ngày tải lên :
21/06/2014, 22:20
... intraprediction scheme in H. 264/ AVC (S scheme) [1], the original BMA intracoding scheme (BMA scheme) [7], and the hybrid intraprediction scheme (H scheme) combined the two proposed methods are testified ... concludes the paper Two Prediction Schemes for Intracoding of H. 264/ AVC In this section, we will explain the improvement mechanism behind the recursive prediction scheme and the enhanced BMA ... textures within the block, which shows more promising performance under high bitrates Also the video contents would affect the performance of these two schemes due to the distribution of smooth regions...
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Báo cáo hóa học: " Temporal Scalability through Adaptive M-Band Filter Banks for Robust H.264/MPEG-4 AVC Video Coding" pptx
Ngày tải lên :
22/06/2014, 23:20
... N = The dependencies between frames are illustrated by the arrows in the figure which shows that frame depends on frame 0, frame on frame and consequently also on frame 0, and so forth This can ... scalability within an a priori nonscalable configuration, such as the one provided by the H. 264/ MPEG-4 AVC codecs The scheme shuffles the frames in a GOP to distribute them as regularly as possible The practical ... adaptive method proposed above, where the intraframe of the second GOP has been im- paired (i.e., the 17th frame in encoding order and the 32th one in decoding order) The advantage of going back for...
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Báo cáo hóa học: " Scalable Fast Rate-Distortion Optimization for H.264/AVC" docx
Ngày tải lên :
22/06/2014, 23:20
... The MB coding mode that has the highest occurring probability will be placed at the beginning of the queue, and will have the highest priority to be checked in mode decision process, while the ... of H. 264/ AVC In the experiments, the frame rate of the sequences is 30 frames per second For QCIF sequences, the number of frames is 240 For CIF sequences, the number of frames is 120 For each ... i=1 As we have shown, each coding mode has its own mean value of RD cost that is different from the one of the others, and the best coding mode has the minimum RD cost If the RD cost of the current...
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Báo cáo hóa học: " Efficient bitstream switching for streaming of H.264/AVC coded video" doc
Ngày tải lên :
20/06/2014, 22:20
... the switching instant) will be much higher than the bandwidth derived from the FOR with SP-frames This high bit rate of the SSP -frame can be reduced by changing the (QPSP, QPSP2) pairs, but this ... step This average is the minimum bandwidth required to transmit all the frames of that step As the SP -frame has a higher bit rate than all the other frames of the step and it is the first frame ... using the statistics of SP-frames at that instant before the transmission starts, therefore at the time of switching, the bandwidth requirement for the SSP -frame will be much larger than the allocated...
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báo cáo hóa học:" Research Article FPSoC-Based Architecture for a Fast Motion Estimation Algorithm in H.264/AVC" doc
Ngày tải lên :
21/06/2014, 20:20
... pixels Hexagon search has search points Multi-big hexagon search has (1/4)(|s|) hexagons, each containing 16 search points Extended hexagon search has search points Diamond search has search points ... Modified Modified SUMH SUMH SUMH SUMH SUMH SUMH SUMH SUMH SUMH SUMH SUMH SUMH SUMH Foreman N/A N/A 97.94 87.75 97.59 85.43 96.94 82.34 96.13 79.04 95.38 76.36 94.76 73.31 Stefan Motherdaughter N/A N/A ... compared with SUMH We therefore conclude that the modified SUMH can be used without much penalty, instead of Full Search ME, for ME in H. 264/ AVC Proposed Supporting Architecture Our top-level architecture...
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Báo cáo hóa học: " Research Article A Multiple-Window Video Embedding Transcoder Based on H.264/AVC Standard" ppt
Ngày tải lên :
22/06/2014, 19:20
... the highest throughput For regionaligned data partitions, the RFMT efficiently refines the prediction mismatch and increases throughput while maintaining better R-D performance For the blocks that ... pixels for both the decoding and reencoding process Specifically, the operation of the transcoder begins with the decoding by the CAVLD The MC and the IP modules in the left-hand side use the original ... up the CPDT, there are many fast algorithms to manipulate the incoming bitstreams in the transform domain However, this is not the case for the H. 264/ AVC standard To our best knowledge, all the...
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Báo cáo hóa học: " Editorial Advanced Video Technologies and Applications for H.264/AVC and Beyond" ppt
Ngày tải lên :
22/06/2014, 23:20
... for H. 264/ AVC, ” Pan et al design a scalable fast RDO algorithm to effectively choose the best coding mode by initially searching the most probable modes The paper, “Rate control for H. 264 with ... domain and an SPIHT coding scheme to achieve an improved coding quality on the H. 264/ AVC SP/SI pictures The paper, H. 264 layered coded video over wireless networks: channel coding and modulation ... the accepted papers We hope that this special issue will inspire further research work on improving the coding performance of H. 264/ AVC coders as well as all the practical issues related to the...
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Báo cáo hóa học: "Robust System and Cross-Layer Design for H.264/AVC-Based Wireless Video Applications" pptx
Ngày tải lên :
22/06/2014, 23:20
... designs for RLC-PDU loss rate of 1% (left-hand side) and 10% (right-hand side) For both cases, we assume that the considered user is also the worst-case user for which the system is optimized For ... observe that without any FEC—represented by the end points in the graphs— FMO performs best Therefore, we conclude that the redundancy is better spent for FEC than for error resilience in the video ... to increase the block length of the code, but at the expense of additional latency Such an approach has been undertaken for MBMS bearers in UMTS where the physical layer channel coding provides...
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Báo cáo hóa học: " Optimized H.264/AVC-Based Bit Stream Switching for Mobile Video Streaming" docx
Ngày tải lên :
22/06/2014, 23:20
... switching positions for which all ancestors of the SP -frame are now available at the receiver, the status is changed to γn = ACK In this case, either the SI -frame or the SP -frame (depending on the ... investigate the case where we only apply SI-frames, such that the performance is actually similar to IDR-picture switching In the following we will compare the achievable performance for different scheduler ... observation of the authors: this method tends to use too often not the next ready data unit, but the second next one in the set, which has locally higher weighted cumulative importance This locally...
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Adaptive network abstraction layer packetization for low bit rate h 264 AVC video transmission over wireless mobile networks under cross layer optimization
Ngày tải lên :
26/09/2015, 11:07
... effects Values higher than indicate that the NALU is required for a drift-free reconstruction, and the higher the value, the higher the impact of a loss of that NALU would be; • forbidden_bit: ... which 19 Chapter Video Coding Techniques stands for predicted frame, and B -frame, which stands for bi-directional predicted frame P -frame is coded based on the previous coded frame, and B -frame ... “synthetic-natural hybrid coding , and digital cinema The ITU-T video coding standards are called recommendations, and they are denoted with H. 26x (e.g., H. 261, H. 262, H. 263, H. 26L and H. 264) The...
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Báo cáo hóa học: " Research Article A Motion-Compensated Overcomplete Temporal Decomposition for Multiple Description Scalable Video Coding" pot
Ngày tải lên :
22/06/2014, 22:20
... conjunction with the other description for improving the fluidity of the reconstructed video We also take advantage of the redundancy existing at the last level to choose, for the frames which can be ... nonredundant coding is better than both MDC schemes (which have comparable performances) However, as soon as the packet loss rate gets higher than 2%, our scheme overpasses by 0.5–1 dB the temporal ... sequence Odd and even frames are separated into two descriptions which are encoded with a Haar MCTF coder (Figure 10 illustrates the motion vectors and temporal transforms for this structure) The coding...
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Báo cáo hóa học: " Research Article Scalable Multiple-Description Image Coding Based on Embedded Quantization" ppt
Ngày tải lên :
22/06/2014, 22:20
... threshold Tr = Tm The rescaling is performed by subtracting the value of the significance threshold from the coefficient magnitude till the resulting value is smaller than the refinement threshold ... embedded coding schemes having the ability to refine the image quality at the decoder side as more information is received This problem has been solved in [14], where multiple- description uniform ... (ii) The QT symbols stand for the largest part of information generated in each coding pass Therefore, if the channel is characterized by a uniformly distributed probability of failure, there...
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Báo cáo hóa học: " End-to-End Rate-Distortion Optimized MD Mode Selection for Multiple Description Video Coding" doc
Ngày tải lên :
22/06/2014, 23:20
... two descriptions, where each has half the temporal resolution of the original video In the event that both descriptions are received, the frames from each can be interleaved to reconstruct the ... to outperform the STD coding approach by as much as 4.5 dB with the Foreman sequence and up to dB with the Carphone sequence ADAPT is able to outperform TS, which more or less performs the second ... experiment, we analyze the performance of the adaptive method when used with unbalanced paths where one path is more reliable than the other The channel consisted of one path with 3% average packet...
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Báo cáo hóa học: " Research Article Joint Source-Channel Coding for Wavelet-Based Scalable Video Transmission Using an Adaptive Turbo Code" doc
Ngày tải lên :
22/06/2014, 19:20
... in this layer and in the higher layers will be discarded Therefore, assuming that all layers h, for h < i, are correctly received and the first corrupted layer is h = i, the jointly source-channel ... after channel decoding or fails to qualify the CRC checks, then all the atoms which have higher index than i are removed by the error driven adaptation module outlined in Figure Finally, SVC decoding ... It will not escape the reader’s notice that ODBTC has a higher PSNR fluctuation than the other two techniques The observed PSNR fluctuation is inherent to scalable video coding for certain sequences...
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Báo cáo hóa học: " Multiple Description Wavelet Coding of Layered Video Using Optimal Redundancy Allocation" pot
Ngày tải lên :
22/06/2014, 23:20
... a scheme that is based on H. 264 and uses the FMO for transmission of video over two channels This scheme uses P-frames and two FMO slices As seen, despite the fact that the H. 264- based scheme ... (W/2L+1 ) × (H/ 2L+1 ), where W, H are the width and height of the frame, respectively, and L is the maximum level of the wavelet decomposition For each block, first the coefficients whose most significant ... both of the descriptions In the case of two descriptions, this is achieved by using the checkerboard pattern which we originally proposed in [9] This approach bears some resemblance with the...
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