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H.264 error resilience coding based on multi-hypothesis motion-compensated prediction

SIGNAL PROCESSING-IMAGE COMMUNICATION 2007年第9期22卷 734-751页

作者： Tsai, Yuh-Chou Lin, Chia-Wen Tsai, Chia-Ming Natl Tsing Hua Univ Dept Elect Engn Hsinchu 300 Taiwan Cyberlink Corp Taipei 100 Taiwan Natl Chung Cheng Univ Dept Comp Sci & Informat Engn Chiayi 621 Taiwan

In this paper, we propose efficient schemes for enhancing the error robustness of multi-hypothesis motion-compensate predictive (MHMCP) coder without sacrificing the coding efficiency significantly. The proposed schemes utilize the concept of reference picture interleaving and data partitioning to make the MHMCP-coded video more resilient to channel errors, especially for burst channel error. Besides, we also propose a scheme of integrating adaptive intra-refresh into the proposed MHMCP coder to further improve the error recovery speed. Extensive simulation results show that the proposed methods can effectively and quickly mitigate the error propagation and the penalty on coding efficiency for clean channels due to the inserted error resilience features is rather minor. (c) 2007 Elsevier B.V. All rights reserved.

关键词： multi-hypothesis prediction video streaming error resilience coding wireless video H.264 video coding

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A Concealment Method for Shape Information in MPEG-4 Coded Video Sequences

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IEEE TRANSACTIONS ON MULTIMEDIA 2000年第3期2卷 185-190页

作者： Shirani, Shahram Erol, Berna Kossentini, Faouzi McMaster Univ Dept Elect & Comp Engn Hamilton ON L8S 4K1 Canada Univ British Columbia Dept Elect & Comp Engn Vancouver BC V6T 1Z4 Canada

In this paper, we propose a new method for error concealment of shape information in MPEG-4 video bit streams that are transmitted over error prone channels. The proposed method employs a MAP estimator with an MRF as the image a priori model. The MRF is designed for binary shape information and its parameters are adapted based on the information of neighboring blocks. Our experimental results show that the proposed concealment method restores missing shape blocks with high accuracy. Compared to the median filtering method, our method restores 20% more missing shape data, with a much greater subjective improvement. The proposed algorithm requires relatively small number of integer multiplications and additions and simple logic operations, making it suitable for real-time implementations.

关键词： error concealment error resilience coding Markov random fields MPEG-4 post-processing shape

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error resilient image communication using content-based multiple description coding

Error resilient image communication using content-based mult...

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3rd International Conference on Information Technology: coding and Computing (ITCC 2002)

作者： Shirani, S McMaster Univ Dept Elect & Comp Engn Hamilton ON Canada

ISBN: (纸本)076951507X

Multiple description coding has been studied as an approach for transmission of images over error Prone environments. The multiple description coding method proposed here takes into account the content of the image and provides the least amount of degradation, caused by loss of descriptors, for those areas of the image which are of greater interest. This is achieved by employing a non-linear geometrical transform to odd redundancy mainly to the area of interest followed by a partitioning of the nonlinearly transformed image into sub-images which are coded and transmitted over separate channels, Simulations show that this approach yields exceptional performance even when only one descriptor is received. Moreover, the method proposed here can be implemented through pre- and post-processing of the image data, without modification to the source codecs (e.g., JPEG).

关键词： multiple description coding error resilience coding source/channel coding image communication content-based image processing

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Redundant-Key-Picture error Resilient coding with Motion-Copy error Concealment in Scalable Video coding

Redundant-Key-Picture Error Resilient Coding with Motion-Cop...

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2nd IEEE International Conference on Computer Science and Information Technology

作者： Shoaib, Muhammad Cai, Anni Beijing Univ Posts & Telecommun Multimedia Commun Ctr Beijing 100088 Peoples R China

ISBN: (纸本)9781424445189

error resilient coding and error concealment techniques have been introduced in scalable video coding to reduce the quality degradation impact of transmission errors. Redundant picture is one of the error resilient tools, appropriate for delay sensitive applications where retransmission is not possible and channel loss rates such as in packet-based wireless networks, are not a priori known. In this paper, combination of redundant-key-picture error resilient coding with motion-copy error concealment at the decoder is proposed based on experimental evaluation. Experimental results demonstrate that significant PSNR gain can be achieved using key picture error concealment with motion-copy for various tested sequences under different packet loss rates compared to JVT-W049.

关键词： error concealment error resilience coding redundan key picture scalable video coding

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Redundant-Key-Picture error Resilient coding with Motion-Copy error Concealment in Scalable Video coding

Redundant-Key-Picture Error Resilient Coding with Motion-Cop...

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2009 2nd IEEE International Conference on Computer Science and Information Technology(第二届计算机科学与信息技术国际会议 ICCSIT2009)

作者： Muhammad Shoaib Anni Cai Multimedia Communication Center Beijing University of Posts and Telecommunications Beijing China

关键词： error concealment error resilience coding redundan key picture scalable video coding

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Redundant-Key-Picture error Resilient coding with Motion-Copy error Concealment in Scalable Video coding

Redundant-Key-Picture Error Resilient Coding with Motion-Cop...

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2009 2nd IEEE International Conference on Computer Science and Information Technology（ICCSIT 2009）

作者： Muhammad Shoaib Multimedia Communication Center Beijing University of Posts and Telecommunications

error resilient coding and error concealment techniques have been introduced in scalable video coding to reduce the quality degradation impact of transmission *** picture is one of the error resilient tools,appropriate for delay sensitive applications where re- transmission is not possible and channel loss rates such as in packet-based wireless networks,are not a priori *** this paper,combination of redundant-key-picture error resilient coding with motion-copy error concealment at the decoder is proposed based on experimental *** results demonstrate that significant PSNR gain can be achieved using key picture error concealment with motion-copy for various tested sequences under different packet loss rates compared to JVT-W049.

关键词： error concealment error resilience coding redundan key picture scalable video coding

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