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The paper presents analysis of multiple description coding (MDC) algorithm with time division of video stream and discussion of its efficiency in videoconferencing. Time division of video stream in two and three substreams are explored. Various video clips are used for experiments. Obtained results demonstrate that MDC with three descriptors can provide acceptable quality for decoded video in case...
A multiple description coding scheme based on prediction-induced randomly offset quantizers is proposed, where each description encodes one source subset with a small quantization stepsize, and other subsets are predictively coded with a large quantization stepsize. Due to the prediction, the quantization bins that a coefficient belongs to in different descriptions are randomly overlapped with each...
Multiple Description Coding (MDC) is a useful source coding method for concealing error in lossy networks. Network coding (NC) permits intermediate nodes within a network to apply algebraic mathematic process on independent streams in transmitter and receiver. This paper attempts to protect data and conceal errors happen in the network by joining MDC and p-cycle NC. First, input data (image) is zero...
Multiple Description Coding (MDC) and Peer-to-Peer transmission protocols prove to be extremely effective in the transmission of multimedia contents for both their robustness and flexibility. As a matter of fact, they permit building efficient architectures for the transmission of three-dimensional video signals. The paper presents an MDC strategy for the transmission of 3D video signals consisting...
A channel adaptive multiple description video codec is presented with flexible redundancy allocation based on modeling and minimization of the end-to-end distortion. We employ a three-loop multiple description coding scheme for which we develop models that estimate the rate-distortion performance of the side encoders as well as the overall end-to-end distortion given channel statistics. A simple yet...
Scalable video coding (SVC) and multiple description coding (MDC) are the two different adaptation schemes for video transmission over heterogenous and best-effort networks such as the Internet. We present a new approach to combine the advantages of SVC and MDC to provide reliable video communication over a wider range of communication networks and/or satisfy application requirements. Our proposed...
Supporting video streaming over wireless mesh networks (WMNs) is a challenging task because of the limited network resource, severe signal interference and contention among neighbor traffic. Path and server diversities are proven feasible to provide solution for video streaming over lossy networks. In this paper, we propose MG-MDC, a multi-gateway technique with multiple description coding (MDC) scheme...
Scalable multiple description coding (SMDC) provides reliability and facility to truncate the descriptions according to the user rate-distortion requirements. In this paper we generalize the conditions of successive refinement of the side quantizer of a multiple description scalar quantizer that has overlapped quantizer cells generated by a modified linear index assignment matrix. We propose that...
This paper presents a proposal for transmitting and recovering images using Multiple Description Coding (MDC) techniques over unreliable multiple links in a mesh network, while using network coding technique to add a protection path. In pure MDC, the loss of one description degrades the received image quality. In the proposed technique, the protection path ensures that all the descriptions are received...
A new multiple description (MD) coding for protecting regions of interest (ROI) in images is proposed by combining the advantages of MD coding and ROI coding. The set partitioning in hierarchical trees (SPIHT) algorithm is used to generate MD streams, and these streams are divided into ROI streams and background (BG) streams. For protection of ROI, our method assigns different redundant trees to the...
In this paper, a multiple description image coding scheme with classified method is presented, in which the wavelet coefficients in each class can be processed separately according to its own source distribution. All the classes will be divided into two larger classes again. One of them is quantized by MDSQ and the other is sub sampled by quad tree and quantized subsequently. The two parts are combined...
Multiple description coding (MDC) provides stable wireless multimedia communications with the help of multiple transmission paths, while distributed video coding (DVC) effectively shifts the encoder complexity to decoder for mobile media devices. We proposed to combine MDC with DVC, abbreviated as MDVC, to construct a reliable and efficient video codec system. To improve the codec performance, the...
In any multiple description coding (MDC) system, how to compose pictures of the “best” quality upon receiving more than one description is always important. To this goal, a DCT-domain translation and overlapping technique has been developed in for the popular multiple description scalar quantization (MDSQ) based video coding. Although certain quality gain (in terms of PSNR) has been achieved, the...
Peer-to-peer media streaming is a very attractive approach since the bandwidth available to serve content scales with demand. A challenge key, however, is making content distribution robust to peer transience. Multiple description coding (MDC) has proven to be very effective in problems related to packet loss, since it generates several descriptions that allow the reconstruction of the original information...
We propose a novel standard-compliant multiple description coding (MDC) method that exploits the H.264/AVC redundant slice tool, performing rate-distortion optimization at the slice level. The strategy to allocate redundancy to each slice jointly takes into account its contribution to distortion, its position in the GOP, the effect of decoder error concealment, and the transmission conditions. This...
With the rapid development of video streaming era, multipath video streaming comes as a promising solution. However, dividing the video into different sub-streams is still considered as an important challenge for researchers. In this paper, we propose an approach for generating multiple complementary descriptions of the video flow, then to couple these descriptions with the path diversity provided...
Recent works have shown how Multiple Description Coding (MDC) proves to be an effective solution for the multimedia transmission over Peer-to-Peer and Content Delivery Networks. However, despite the flexibility and scalability of these novel transmission paradigms, packet streams are still affected by losses, and an effective packet labelling that differentiates the QoS levels for the transmitted...
Scalable video coding (SVC) was recently standardized as an extension of the H.264/AVC standard. A scalable coder allows to combine different layers of spatial, temporal and quality scalability, and is a viable solution for adaptation to user characteristics and network conditions. On the other hand, Multiple description coding (MDC) can provide error resilience and graceful quality degradation for...
An analysis-based approach for unequal loss-protected multiple description coding (packetization) of the scalable (prioritized / progressive) source code streams is proposed. For a given number of packets (descriptions) of the known size, unequal loss-protected packetization leads to segment the scalable code stream, such that the source can be reconstructed with the maximum possible fidelity at the...
This paper proposes a multiple description coding scheme based on a multi-loop structure, which prevents drift distortion accumulation in intra predicted slices. The drift is compensated by generating a controlled amount of side information used by the decoder whenever any description is lost in the corresponding network path. The experimental results show that intra predicted slices do not suffer...
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