New Hybrid Error Concealment for Digital Compressed Video

Hadar, Ofer; Huber, Merav; Huber, R.; Greenberg, Shlomo

doi:10.1155/asp.2005.1821

Cited by 13 publications

(7 citation statements)

References 14 publications

(10 reference statements)

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“…It can improve the quality of decoded video corrupted by transmission errors, without any additional payload on the encoder or channel. EC can be classified into three categories: spatial concealment [19][20][21], temporal concealment [22][23][24], and hybrid spatial and temporal concealments [25][26][27]. Spatial EC is used to interpolate the lost block from its spatially neighboring available blocks or coefficients in the current frame.…”

Section: Error Concealment Ec Consists In Estimating or Inter-mentioning

confidence: 99%

Improved side information generation for distributed video coding

Abou-Elailah

Farah

Cagnazzo

et al. 2011

3rd European Workshop on Visual Information Processing

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Distributed video coding (DVC) is a video coding paradigm allowing low complexity encoding for emerging applications such as wireless video surveillance. Side information (SI) generation is a key function in the DVC decoder, and plays a key-role in determining the performance of the codec. This paper proposes an improved SI generation for DVC, which exploits both spatial and temporal correlations in the sequences. Partially decoded Wyner-Ziv (WZ) frames, based on initial SI by motion compensated temporal interpolation, are exploited to improve the performance of the whole SI generation. More specifically, an enhanced temporal frame interpolation is proposed, including motion vector refinement and smoothing, optimal compensation mode selection, and a new matching criterion for motion estimation. The improved SI technique is also applied to a new hybrid spatial and temporal error concealment scheme to conceal errors in WZ frames. Simulation results show that the proposed scheme can achieve up to 1.0 dB improvement in rate distortion performance in WZ frames for video with high motion, when compared to state-of-the-art DVC. In addition, both the objective and perceptual qualities of the corrupted sequences are significantly improved by the proposed hybrid error concealment scheme, outperforming both spatial and temporal concealments alone.

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Section: Error Concealment Ec Consists In Estimating or Inter-mentioning

confidence: 99%

Improved side information generation for distributed video coding

Abou-Elailah

Farah

Cagnazzo

et al. 2011

3rd European Workshop on Visual Information Processing

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“…The objective is to provide a basic level of error resiliency for the decoder. Weighted picture value averaging for intra pictures and boundary-matching based motion vector recovery for inter pictures [4] were the two main ideas customized for the error concealment algorithm implemented in H.264 [5].…”

Section: Introductionmentioning

confidence: 99%

Spatial-Temporal Error Concealment Scheme for Intra-coded Frames

Huang¹

2011

2011 International Conference on Multimedia and Signal Processing

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Error concealment with good restored video quality and low computational cost is significantly required for video streams transmitted in error-prone channels, especially for real-time applications. An efficient error concealment scheme for intra-frame is proposed. Spatial circular interpolation method is used to prevent the accumulation of prediction error. Meanwhile the motion vectors surrounding the damaged MB are used when all the adjacent blocks are error to improve the effect of error concealment. The experimental results indicate that compared to the spatial error concealment algorithm in H.264, the proposed scheme can restore more texture information and improve the quality both subjectively and objectively greatly.Keywords Error Concealment; Spatial-temporal; Intra-coded Frame . INTRODUCTIONThe emerging video coding standard H.264, which is jointly developed by ITU-T and MPEG, provides state-of-the-art video coding technique and the main goals of this standard are enhanced compression performance and provision of a network friendly video representation [1]. However it is sensitive to the transmission errors. Due to the high-efficiently predictive coding and the variable length entropy coding, errors will not only corrupt the current frame but also propagate to the succeeding frames [2].There are four main strategies for eliminating the image quality degradation effect by transmission errors [3], including (1) the channel coding strategy, (2) the error resilient (preprocessing) strategy, (3) the encoder-decoder interactive error control strategy, and (4) the error concealment (post processing) strategy.In the error concealment (post processing) strategy, based on the redundancy information inherent in neighboring pixels and the constraints on compressed video data, transmission errors can be directly corrected or concealed without changing the encoder or embedding redundant bits or set up a feedback channel from the decoder to the encoder like the other three strategies, so it becomes more and more popular in video transmission.In this research, we focus on the error concealment techniques for intra-coded frames. Error concealment is a non-normative feature in H.264, test model. The objective is to provide a basic level of error resiliency for the decoder. Weighted picture value averaging for intra pictures and boundary-matching based motion vector recovery for inter pictures [4] were the two main ideas customized for the error concealment algorithm implemented in H.264 [5].In the past a few years, great efforts have been made to improve the concealment techniques for intra-coded frames [6,7]. Spatial error concealment algorithm utilizing directional decision and intra-prediction, has been proposed to improve the capability of recovering edges with relatively lower computational complexity [8]. However, the effectiveness of these spatial error concealment techniques based on the information of edge detection is probably dependent on the accuracy of the edge detection algorithms. On the other hand, the edge...

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“…It can improve the quality of decoded video corrupted by transmission errors, without any additional payload on the encoder or channel. EC can be classified into three categories: temporal concealment, spatial concealment, and hybrid spatial and temporal concealment [2]. Temporal EC usually leads to better results when compared to spatial concealment, given the typically high temporal correlation in video.…”

Section: Introductionmentioning

confidence: 99%

“…However, for video with scene changes or very high or irregular motion, spatial EC is preferred. Some attempts have been made to combine both spatial and temporal EC to improve performance [2,3,4]. These schemes use some mode selection methods to decide whether to use spatial or temporal EC.…”

Section: Introductionmentioning

confidence: 99%

Hybrid spatial and temporal error concealment for distributed video coding

Ouaret

Dufaux

et al. 2008

2008 IEEE International Conference on Multimedia and Expo

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Distributed Video Coding (DVC) is based on a new paradigm in coding, which has received many interests recently. This paper proposes a hybrid spatial and temporal error concealment scheme to conceal errors in Wyner-Ziv (WZ) frames. We first use a spatial concealment based on edge directed filter. This step is exploited to improve the performance of subsequent temporal concealment. An enhanced temporal concealment based on motion compensated temporal interpolation is proposed, including motion vector refinement and smoothing, optimal compensation mode selection, and a new matching criterion for motion estimation. Simulation results show that the objective qualities as well as the perceptual qualities of the corrupted sequences are significantly improved by the hybrid error concealment, outperforming both spatial and temporal concealments alone.

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New Hybrid Error Concealment for Digital Compressed Video

Cited by 13 publications

References 14 publications

Improved side information generation for distributed video coding

Improved side information generation for distributed video coding

Spatial-Temporal Error Concealment Scheme for Intra-coded Frames

Hybrid spatial and temporal error concealment for distributed video coding

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