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Estimating Rate-Distortion for multiple description coding Based on Zero Padding

JOURNAL OF APPLIED SCIENCE AND ENGINEERING 2016年第2期19卷 229-239页

作者： Chang, Rong-Hua Su, Chieh-Wei Lin, Chow-Sing Natl Univ Tainan Deparment Comp Sci & Informat Engn Tainan 700 Taiwan

In the studies related to multiple description coding (MDC), applying zero padding not only improves the spatial correlation between descriptions but also increases their sizes. However, as we pad more zeros, the spatial correlation does not improve linearly. Therefore, the distortion is not reduced as the same amount when the size increases. In this paper, we focus on how to efficiently find an acceptable trade-off between the number of padded zeros and the increase of distortion in MDC. In this paper, we propose two distortion estimations for MDC with zero padding based on spatial quincunx distribution, which are standard deviation for distortion estimation and triangular linear approximation distortion estimation (TLA-DE) to efficiently calculate the distortion for the number of padded zeros atthe horizontal direction. In order to search for the acceptable number of padded zeros, we propose two search methods, Naive Search and Best Division Search, which are both based on the proposed rate-distortion trade-off indicator. Our experiments result show that the worst error of distortion estimation by TLA-DE is up to 18%, but the average is 5.5% with 95% confidence level. The executing time of best division search is about two times faster than that of naive search for 11 test sequences. To sum up, we confirm that the acceptable trade-off between rate and distortion in low computational complexity can be found by using the best division search on TLA-DE.

关键词： multiple description coding Zero Padding Rate-Distortion Scalable Video coding

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A Total Variation Based Approach for Composing Better Pictures in multiple description coding

A Total Variation Based Approach for Composing Better Pictur...

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Conference on Visual Communications and Image Processing (VCIP)

作者： Zhu, Shuyuan Zeng, Bing Hong Kong Univ Sci & Technol Dept Elect & Comp Engn Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9780819482341

One of the important issues in multiple description coding (MDC) for image and video signals is to compose pictures of the "best" quality when more than one description is received at the decoder side. To this goal, a transform-domain overlapping technique combined with some necessary translations in the transform domain is proposed in the popular MDC schemes with staggered quantizers. However, the achievable gain is rather limited. In this paper, we formulate this enhancement problem as a total variation (TV) regularized optimization constrained by the knowledge of the quantization intervals of the DCT coefficients of each composed picture. In this TV-based approach, the transform-domain overlapping technique is used to find the more accurate quantization intervals in which the true DCT coefficients will fall while receiving more than one description. Simulation results demonstrate that such a TV-based enhancement yields a higher quality gain in both objective (e.g. PSNR-based) and subjective (i.e. visual perception) evaluations than using the transform-domain overlapping technique.

关键词： multiple description coding multiple description scalar quantization staggered quantizers total variation

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A Lower Bound on the Sum Rate of multiple description coding With Symmetric Distortion Constraints

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IEEE TRANSACTIONS ON INFORMATION THEORY 2014年第12期60卷 7547-7567页

作者： Song, Lin Shao, Shuo Chen, Jun McMaster Univ Dept Elect & Comp Engn Hamilton ON L8S 4K1 Canada

We derive a single-letter lower bound on the minimum sum rate of multiple description coding with symmetric distortion constraints. For the binary uniform source with the erasure distortion measure or Hamming distortion measure, this lower bound can be evaluated with the aid of certain minimax theorems. A similar minimax theorem is established in the quadratic Gaussian setting, which is further leveraged to analyze the special case where the minimum sum rate subject to two levels of distortion constraints (with the second level imposed on the complete set of descriptions) is attained;in particular, we determine the minimum achievable distortions at the intermediate levels.

关键词： Erasure distortion Hamming distortion mean squared error minimax theorem multiple description coding saddle point

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The Sum Rate of Vector Gaussian multiple description coding With Tree-Structured Covariance Distortion Constraints

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IEEE TRANSACTIONS ON INFORMATION THEORY 2017年第10期63卷 6547-6560页

作者： Xu, Yinfei Chen, Jun Wang, Qiao Southeast Univ Sch Informat Sci & Engn Nanjing 210096 Jiangsu Peoples R China Chinese Univ Hong Kong Inst Network Coding Hong Kong Hong Kong Peoples R China McMaster Univ Dept Elect & Comp Engn Hamilton ON L8S 4K1 Canada

A single-letter lower bound on the sum rate of multiple description coding with tree-structured distortion constraints is established by generalizing Ozarow's celebrated converse argument through the introduction of auxiliary random variables that form a Markov tree. For the quadratic vector Gaussian case, this lower bound is shown to be achievable by an extended El Gamal-Cover scheme, yielding a complete characterization of the minimum sum rate.

关键词： Auxiliary random variable covariance distortion Karush-Kuhn-Tucker conditions Markov structure multiple description coding sum rate vector Gaussian source

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Consecutive Redundancy Control for Robust multiple description coding over Unreliable Networks

Consecutive Redundancy Control for Robust Multiple Descripti...

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IEEE Wireless Communications and Networking Conference (WCNC)

作者： Yang, Meng Lan, Xuguang Zheng, Nanning Xi An Jiao Tong Univ Inst Artificial Intelligence & Robot Xian 710049 Peoples R China

ISBN: (纸本)9781612842547

Different system may have different request on coding efficiency and security, even the characteristics of the unreliable networks are fixed, such as bit error rate, packet loss rate and bandwidth. In this paper, a novel multiple description coding (MDC) scheme is presented for the unreliable networks, considering both the network characteristics and system request. An error-resilient problem based on MDSQ [1] method is proposed and analyzed, and then an iterative redundancy-control method is designed based on ERMDC [2] by index pair ordering. Accordingly, a fast IA method is proposed only considering the high redundancy case. Simulation results show that the redundancy can be easily and precisely adjusted to meet all the requests. Meanwhile, the error resilience and R-D bound of MDC is self-adaptively guaranteed well enough for all cases.

关键词： multiple description coding redundancy control error resilience

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Explicit Network-Adaptive Robust multiple description coding

Explicit Network-Adaptive Robust Multiple Description Coding

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Data Compression Conference (DCC)

作者： Yang, Meng Lan, Xuguang Zheng, Nanning Xi An Jiao Tong Univ Inst Artificial Intelligence & Robot Xian 710049 Peoples R China

ISBN: (纸本)9780769543529

The data delivery performance of multiple description coding (MDC) over unreliable network with capacity constraints is always related with three factors: redundancy rate, packet loss rate (PLR), bit error rate (BER). It is supposed that the packet losses have been settled by MDC with certain redundancy. We simplified the network-adaptive data delivery problem to only relating with the redundancy rate factor, because the bit-error resilience of the system can be self-adaptively guaranteed well enough for any redundancy case by the proposed codeword ordering method. Then the problem becomes explicit, and is easily and precisely solved by the proposed iterative redundancy control method. The proposed scheme is an extension of scalar quantization (SQ) based MDC, either balanced or unbalanced case. The related index assignment (IA) problem is well solved, and the R-D bound is proved trending to be optimal. This method can be incorporated into any SQ-based MDC system to simplify the network-adaptive delivery problem, fully considering the related factors.

关键词： multiple domain controllers CCL22 gene delivery problem redundancy Packet loss multiple description coding Explicit ASSAY SCALE error-resilience capacities constraint Bit error rate

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VERTEX PARTITIONING BASED multiple description coding OF 3D DYNAMIC MESHES

VERTEX PARTITIONING BASED MULTIPLE DESCRIPTION CODING OF 3D ...

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3DTV Conference - True Vision - Capture, Transmission and Display of 3D Video

作者： Bici, M. Oguz Stefanoski, Nikolce Akar, Gozde Bozdagi Middle E Tech Univ TR-06531 Ankara Turkey Leibniz Univ Hannover D-30167 Hannover Germany

ISBN: (纸本)9781424443178

In this paper, we propose a multiple description coding (MDC) method for reliable transmission of compressed time consistent 3D dynamic meshes. It trades off reconstruction quality for error resilience to provide the best expected reconstruction of 3D mesh sequence at the decoder side. The method is based on partitioning the mesh vertices into two sets and encoding each set independently by a 3D dynamic mesh coder. The encoded independent bitstreams or so-called descriptions are transmitted independently. The 3D dynamic mesh coder is based on predictive coding with spatial and temporal layered decomposition. In addition, the proposed method allows for different redundancy allocations by duplicating a number of encoded spatial layers in both sets. The algorithm is evaluated with redundancy-rate-distortion curves and flexible trade-off between redundancy and side distortions can be achieved.

关键词： multiple description coding 3D dynamic meshes time consistent mesh sequence

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VIDEO MULTICAST BASED multiple description coding AND MULTI-PATHS IN WIRELESS AD HOC NETWORKS

VIDEO MULTICAST BASED MULTIPLE DESCRIPTION CODING AND MULTI-...

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22nd IEEE Canadian Conference on Electrical and Computer Engineering

作者： Badarneh, Osamah S. Kadoch, Michel Elhakeem, Ahmed A. Ecole Technol Super Dept Genie Elect Montreal PQ Canada Concordia Univ Dept Elect & Comp Engn Concord MA USA

ISBN: (纸本)9781424435098

multiple description coding (MDC) has been proposed as a source coding technique that is robust to channel errors for video transmission. MDC generates multiple independent bit-streams, where the multiple bit-streams are referred to as multiple descriptions (MD). Furthermore, it enables a useful reproduction of the signal when any description is received correctly. This paper proposes a new multicast heuristic algorithm, that attempts to take the benefit of MDC properties and multiple paths, to improve the user's satisfaction for a group of heterogeneous destinations in wireless ad hoe network. Extensive simulations clearly demonstrate the effectiveness of the proposed algorithm in improving the user's satisfaction irrespective of the number of destinations in the multicast group.

关键词： multiple description coding layered coding node-disjoint paths wireless ad hoc networks

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RATE-CONTROLLED REDUNDANCY-ADAPTIVE multiple description coding FOR VIDEO TRANSMISSION OVER MIMO SYSTEMS

RATE-CONTROLLED REDUNDANCY-ADAPTIVE MULTIPLE DESCRIPTION COD...

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IEEE International Conference on Image Processing

作者： Kamnoonwatana, N. Agrafiotis, D. Canagarajah, C. N. Univ Bristol Dept Elect & Elect Engn Bristol BS8 1UB Avon England

ISBN: (纸本)9781424479948

This paper proposes a rate controlled redundancy-adaptive multiple description video coding method. The method adjusts the level of redundancy allocated to each macroblock based on an end to end distortion model that takes into account the effects of error propagation and coneealment. Rate control at the macroblock level, ensures that the total bit-rate of all descriptions does not exceed the target rate. Results show that the proposed MDC codec can adapt very well to changing transmission conditions. When coupled with a MIMO architecture, performance gains of up to 14 dB were recorded over single description transmission at high packet error rates and no perceptible performance deficit at low packet error rates.

关键词： multiple description coding error resilience video transmission

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Joint multiple description coding and FEC for delay-constrained applications in congested networks

Joint multiple description coding and FEC for delay-constrai...

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IEEE Information Theory Workshop

作者： Yu, Xunqi Modestino, James W. Fan, Dian Univ Miami Dept Elect & Comp Engn Coral Gables FL 33124 USA

ISBN: (纸本)9781424415632

multiple description coding (MDC) and forward error control (FEC) are two frequently used techniques for improving transport performance on lossy packet networks. Typically, these two techniques are used separately and independently with resulting performance dependent on network conditions' the choice of coding parameters and the applications being transported. In this paper we propose and analyze a joint MDC and FEC coding approach for delay-constrained applications on congested networks under some idealized modeling assumptions which are, nevertheless, sufficient to draw some qualitative conclusions. Specifically, for fixed delay constraints we show that under a range of operating parameters, there is an optimal FEC coding block size, channel coding rate and assignment of MDC rates which can achieve significantly improved end-to-end performance, compared to the performance achieved by using only MDC or FEC alone.

关键词： multiple description coding OPERATING PARAMETER coding

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