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Canadian Conference on Electrical and Computer Engineering

作者： Samarawickrama, Upul Liang, Jie Simon Fraser Univ Sch Engn Sci Burnaby BC V5A 1S6 Canada

ISBN: (纸本)9781424416424

A two-stage multiple description predictive coding technique is proposed. A predictive encoder is used in the first stage of each description. The two encoders are designed to create staggered quantizers for the input, which allow further refinement of the joint reconstruction in the second stage. Theoretical analysis and simulation results show that this method is very efficient in the high rate multiple description coding of strongly correlated sources.

关键词： multiple description coding information theory speech coding

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multiple description Image coding: A Low Complexity Approach for Lossy Networks

Multiple Description Image Coding: A Low Complexity Approach...

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IEEE Region 10 Conference (TENCON 2008)

作者： Mansoor, Nafees Ndiaye, Fatou Chowdhury, Shahin Akter Razzak, M. Abdur Independent Univ Sch Engn & Comp Sci Dhaka Bangladesh

ISBN: (纸本)9781424424085

The development of an efficient and reliable multiple descriptions coding (MDC) scheme over lossy communication networks has been described. The advantage of MDC is that, if all the channels work, a high quality, possibly lossless, reconstruction can be achieved from all the received descriptions. On the other hand, a lower but still acceptable quality can be achieved if some of the channels are not received at all. In this article, a general framework of an efficient multiple description robust communication system with 2- and 4-channel cases is presented with a proposed block-based dc reallocation approach using intrinsic correlation. The peak signal-to-noise ratio (PSNR), mean squared error (MSE), bit rate, and entropy are calculated with the proposed method to analyze the reconstruction quality and the calculated results are compared with those of the other MDC methods. It is found that the proposed method, which uses an intrinsic correlation, gives comprehensive improvements over the other recently developed methods.

关键词： multiple description coding nonhierarchical decomposition block-based transform coding discrete cosine transform

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multiple-description image coding with distributed source coding and side information

Multiple-description image coding with distributed source co...

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Conference on Multimedia Systems and Applications VII

作者： Wu, M Vetro, A Chen, CW Univ Missouri Dept ECE Columbia MO USA

ISBN: (纸本)0819455539

multiple description coding (MDC) is a source coding technique that involves coding the source information into multiple descriptions. When these descriptions are transmitted over different channels in packet network or error-prone wireless environment, graceful degradation can be achieved even if part of descriptions are not received by the receiver. When MDC is applied to wavelet subband based image coding, it is possible to introduce correlation between the descriptions in each subband. In this paper, we consider using such a correlation as well as potentially error corrupted description as side information in the decoding to formulate the MDC decoding as a Wyner Ziv decoding problem. If only part of descriptions is lost, however, their correlation information is still available. Therefore, the proposed Wyner Ziv decoder can recover the description by using the correlation information and the error corrupted description as side information. High quality reconstruction can still be obtained by combining the decoded descriptions from Wyner Ziv decoder. The proposed scheme takes advantage of an efficient way to use the correlation information, thus makes the system more robust to channel error corruption. Experimental result shows that, comparing to conventional multiple description wavelet based image coding, the PSNR of the received and decoded image could be improved noticeably when coding at the same bit rate.

关键词： multiple description coding Wyner-Ziv coding wavelet based coding MDSQ

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ADAPTIVE ERROR CONCEALMENT FOR multiple description VIDEO coding USING MOTION VECTOR ANALYSIS

ADAPTIVE ERROR CONCEALMENT FOR MULTIPLE DESCRIPTION VIDEO CO...

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19th IEEE International Conference on Image Processing (ICIP)

作者： Gadgil, Neeraj Yang, Meilin Comer, Mary L. Delp, Edward J. Purdue Univ Sch Elect & Comp Engn Video & Image Proc Lab VIPER W Lafayette IN 47907 USA

ISBN: (纸本)9781467325332;9781467325349

multiple description coding (MDC) is an efficient error resilient video coding method especially for real-time applications when retransmission is unacceptable. For applications with scalable, multicast and P2P environments, it is advantageous to use more than two descriptions. In this paper, we present an adaptive temporal-spatial error concealment method using motion vector analysis to improve the performance of MDC. Experimental results demonstrate the efficacy of the proposed method.

关键词： multiple description coding adaptive error concealment motion vector analysis

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Spatial-frequency HEVC multiple description video coding with adaptive perceptual redundancy allocation

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JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION 2022年 88卷

作者： Wang, Feifeng Chen, Jing Zeng, Huanqiang Cai, Canhui Huaqiao Univ Sch Informat Sci & Engn Xiamen Peoples R China Huaqiao Univ Sch Engn Quanzhou Peoples R China Xiamen Key Lab Mobile Multimedia Commun Xiamen Peoples R China

multiple description coding (MDC) approaches improve the error-resilient performance of video transmission by introducing redundancy. The existing multiple description video coding (MDVC) schemes are rarely designed for particular coding structure of HEVC, and the characteristics of the human visual system (HVS) are seldom considered. In this paper, a spatial-frequency multiple description video coding with adaptive perceptual redundancy allocation framework, named SF-PMDVC, is proposed for HEVC. For descriptions generation, after polyphase down-sampling in spatial domain, a transformation based on integer discrete cosine transform (DCT) is expended to adapt to the flexible coding unit partitioning process in HEVC, and the frequency coefficients are segmented and mapped to reduce the bitrate of each description. To further improve the performance of MDVC, an adaptive perceptual redundancy allocation strategy based on visual saliency is proposed, which improves the coding efficiency adapting to the visual perception. Experimental results show that the proposed scheme im-proves the error resiliency of HEVC by achieving superior objective and subjective reconstructed video quality as compared to the state-of-the-art MDVC methods for HEVC.

关键词： multiple description coding High efficiency video coding (HEVC) Human visual system Error resilience

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multiple description video coding based on forward error correction within expanding windows

Multiple description video coding based on forward error cor...

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IEEE International Conference on Image Processing

作者： Chunyu Lin Yao Zhao Jimin Xiao Tammam Tillo Institute of Information Science Beijing Jiaotong University Department of Electrical Engineering and Electronics University of Liverpool Liverpool L69 3GJ U.K. Department of Electrical and Electronic Engineering Xian Jiaotong-Liverpool University Suzhou China

ISBN: (纸本)9781479923427

In this paper, an MDC scheme based on forward error correction(FEC) within expanding windows is proposed. Firstly, the video sequence will be coded into source packets with/without slice group enabled. Secondly, the appropriate FEC packets are inserted according to the packet loss rate. Since the previous frames in a GOP is generally more important than the following frames in the GOP, an expanding window is exploited so that the FEC packets for the current frame will also protect the previous frames in the window. After this, the source packets with the inserted FEC packets will be divided into two descriptions and transmitted into two independent channels. When some packets in one description are lost, FEC decoding will try to recover the lost packets. Through this scheme, the source packets can get appropriate protection while the compression efficiency will not be degraded too much. The experimental results show that the proposed scheme outperforms the compared schemes up to 3dB.

关键词： Video coding multiple description coding forward error correction

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DCT-Domain Translation for Composing Better Pictures in the MDSQ-based multiple description Video coding

DCT-Domain Translation for Composing Better Pictures in the ...

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2010 IEEE International Conference Conferenhce on Wireless Communications,Networking and Information Security(2010 IEEE 无线通信、网络技术与信息安全国际会议 WCNIS)

作者： Shuyuan Zhu Siu-Kei Au Yeung Bing Zeng Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong China

ISBN: (纸本)9781424458509

multiple description coding (MDC) is an effective technique for transmission of image and video signals over error-prone channels. Naturally, a good MDC system needs to guarantee a quality gain when more descriptions are received. To this goal, a transform-domain overlapping technique can be used in the popular multiple description scalar quantization (MDSQ) scheme. However, this overlapping technique often becomes inapplicable in multiple description video coding (MDVC) because different reference frames are used in different descriptions at the motion-compensation stage. In this paper, we introduce a DCT-domain translation to solve this problem, i.e., after the translation, the overlapping technique can be applied to all predictive frames. We demonstrate that frames with a better quality can be composed upon receiving more descriptions. In particular, a remarkable objective quality gain (in terms of PSNR) has been observed.

关键词： multiple description coding multiple description scalar quantization overlapping technique translation

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SCALABLE VS. multiple-description VIDEO coding FOR ADAPTIVE STREAMING OVER PEER-TO-PEER NETWORKS

SCALABLE VS. MULTIPLE-DESCRIPTION VIDEO CODING FOR ADAPTIVE ...

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IEEE International Conference on Image Processing

作者： K. Tolga Bagci C. Goktug Gurler A. Murat Tekalp College of Engineering Koc University Istanbul Turkey

ISBN: (纸本)9781479923427

Both scalable video coding (SVC) and multiple description coding (MDC) have been evaluated in the literature for adaptive streaming over peer-to-peer (P2P) networks. However, these evaluations have used either unrealistic or too specific P2P topologies or omitted considering key video coding parameters such as compression efficiency and redundancy. In this study, we evaluate the performances of SVC, MDC and scalable multiple description coding (SMDC) with network-level adaptation schemes under varying peer bandwidth, average end-to-end delay, and peer exit ratio, as well as MDC redundancy levels. Extensive test results help us to reach conclusions regarding under which conditions SVC, MDC or SMDC should be preferred to achieve a reliable video service over mesh P2P overlays.

关键词： Peer-to-peer video streaming scalable video coding multiple description coding

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A Novel multiple description Video coding Based on Data Reuse

A Novel Multiple Description Video Coding Based on Data Reus...

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IEEE International Conference on Image Processing

作者： Meng Dong Canhui Cai Kai-Kuang Ma School of Information Science and Technology Huaqiao University Xiamen China 361021 School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798

ISBN: (纸本)9781479923427

A novel H.264-based multiple description coding (MDC) framework, called data reuse MDC (DR-MDC), is proposed in this paper. The input video sequence is first down-sampled by a factor of two in both horizontal and vertical directions, respectively, on each frame to generate four sub-sequences, followed by grouping them into two descriptions via the quincunx manner. In each description, one sub-sequence is directly encoded by applying the H.264/AVC encoder, while the other is examined at each macroblock (MB) to determine whether the encoding of the current MB should be conducted or skipped completely based on the following criterion: If the MB is considered locating in a homogeneous or still background region, the encoding process will be skipped. Otherwise, the neighboring prediction algorithm will be used to predict the pixel values of this MB, and the resultant prediction errors will be further encoded and transmitted. Experimental results have shown that the proposed DR-MDC scheme is more error resilient and yields better reconstructed video than the existing state-of-the-art MDC methods.

关键词： H.264/AVC multiple description coding data reuse neighboring prediction multiple description coding MACHINE BASIN multiple domain controllers CCL22 gene system recovery Video sequences Reuse reuse Prediction algorithms Error of prediction Video coding

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A collaborative multiple description transform coding and statistical error concealment method for error resilient video streaming over noisy channels

A collaborative multiple description transform coding and st...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Yen-Chi Lee Yucel Altunbasak Center of Signal and Image Processing Georgia Institute of Technology Atlanta GA USA

Historically, multiple description coding (MDC) and post-processing error concealment (ECN) algorithms for error-resilient video transmission have evolved separately. Although multiple description coding provides a way to make the video quality degrade gracefully in the presence of packet losses, the resulting quality may be unsatisfactory when only one description is used to reconstruct the signal. This paper proposes a joint description transform coding (MDTC) and statistical error concealment algorithm that adopts a maximum a posteriori (MAP) estimation approach to compensate for the loss of descriptions. This coordination results in significant improvements in reconstructed video quality over independent use of MDTC.

关键词： Encoding multiple description coding Noise measurement Image reconstruction

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