Control-Point Representation and Differential Coding Affine-Motion Compensation

Huang, Han; Woods, John W.; Zhao, Yao; Bai, Huihui

doi:10.1109/tcsvt.2013.2254977

Cited by 53 publications

(17 citation statements)

References 32 publications

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“…On the other hand, in generalized block-based methods [140,150], each block can determine its own affine motion parameters, which is consistent with the standard video coding framework, except that the MVs are replaces by affine motion parameters for MC. Generalized block-based affine models are intuitively promising since it can better characterize complex This is the author's version of an article that has been published in this journal.…”

Section: (1) Global Affine Motion Modelsmentioning

confidence: 88%

“…Huang [154] extended the work in [150] for HEVC and designed the affine skip/direct mode to improve the coding efficiency. This was further developed to a quite complex affine MC framework [140], in which coding modes including affine inter/skip/ direct/merge were designed to fully exploit the motion correlation between neighboring blocks. Chen further developed the affine skip/direct mode to incorporate the merge mode for translational motion model and added temporal motion candidates into the candidate lists [155].…”

Section: (1) Global Affine Motion Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances on HEVC Inter-Frame Coding: From Optimization to Implementation and Beyond

Zhang

Fan

et al. 2020

IEEE Trans. Circuits Syst. Video Technol.

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High Efficiency Video Coding (HEVC) has doubled the video compression ratio with equivalent subjective quality as compared to its predecessor H.264/AVC. The significant coding efficiency improvement is attributed to many new techniques. Interframe coding is one of the most powerful yet complicated techniques therein and has posed high computational burden thus main obstacle in HEVC-based real-time applications. Recently, plenty of research has been done to optimize the inter-frame coding, either to reduce the complexity for real-time applications, or to further enhance the encoding efficiency. In this paper, we provide a comprehensive review of the state-of-the-art techniques for HEVC inter-frame coding from three aspects, namely fast inter coding solutions, implementation on different hardware platforms as well as advanced inter coding techniques. More specifically, different algorithms in each aspect are further subdivided into sub-categories and compared in terms of pros, cons, coding efficiency and coding complexity. To the best of our knowledge, this is the first such comprehensive review of the recent advances of the inter-frame coding for HEVC and hopefully it would help the improvement, implementation and applications of HEVC as well as the ongoing development of the next generation video coding standard.

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Section: (1) Global Affine Motion Modelsmentioning

confidence: 88%

Section: (1) Global Affine Motion Modelsmentioning

confidence: 99%

Recent Advances on HEVC Inter-Frame Coding: From Optimization to Implementation and Beyond

Zhang

Fan

et al. 2020

IEEE Trans. Circuits Syst. Video Technol.

View full text Add to dashboard Cite

show abstract

“…In the block-based affine motion model, motion vectors (MVs) of each Control-point need to be coded in AMC [9]. For example, three Control-points at the corner are needed to describe the affine motion process of a rectangular block precisely, while the parameters are three times as many as the translational motion model's parameters.…”

Section: Related Workmentioning

confidence: 99%

An Improved Fast Affine Motion Estimation Based on Edge Detection Algorithm for VVC

Ren

Cui

2020

Symmetry

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As a newly proposed video coding standard, Versatile Video Coding (VVC) has adopted some revolutionary techniques compared to High Efficiency Video Coding (HEVC). The multiple-mode affine motion compensation (MM-AMC) adopted by VVC saves approximately 15%-25% Bjøntegaard Delta Bitrate (BD-BR), with an inevitable increase of encoding time. This paper gives an overview of both the 4-parameter affine motion model and the 6-parameter affine motion model, analyzes their performances, and proposes improved algorithms according to the symmetry of iterative gradient descent for fast affine motion estimation. Finally, the proposed algorithms and symmetric MM-AMC flame of VTM-7.0 are compared. The results show that the proposed algorithms save 6.65% total encoding time on average, which saves approximately 30% encoding time of affine motion compensation.

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“…High order prediction (HOP) models, e.g., using geometric transformations with more DoF, have been studied during the last two decades in traditional 2D and 3D image coding scenarios. Several geometric models, like translation, rotation, scale, shear and perspective changes have been used to improve the coding efficiency, by exploiting spatial [7], temporal [8]- [13] and inter-view [14]- [17] redundancy. In most proposals, these models have been applied image-wise (instead of blockwise), due to two main reasons: (i) high computational complexity in block-wise model parameter estimation, and (ii) significant additional bit rate required for parameter transmission.…”

Section: Introductionmentioning

confidence: 99%

Light Field Image Coding Using High-Order Intrablock Prediction

Monteiro

Nunes

Rodrigues

et al. 2017

IEEE J. Sel. Top. Signal Process.

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This paper proposes a two-stage high order intra block prediction method for light field image coding. This method exploits the spatial redundancy in lenslet light field images by predicting each image block, through a geometric transformation applied to a region of the causal encoded area. Light field images comprise an array of micro-images that are related by complex geometric transformations that cannot be efficiently compensated by state-of-the-art image coding techniques, which are usually based on low order translational prediction models. The two-stage nature of the proposed method allows to choose the order of the prediction model most suitable for each block, ranging from pure translations to projective or bilinear transformations, optimized according to an appropriate rate-distortion criterion. The proposed higher order intra block prediction approach was integrated into an HEVC codec and evaluated for both unfocused and focused light field camera models, using different resolutions and microlens arrays. Experimental results show consistent bitrate savings, which can go up to 12.62%, when compared to a lower order intra block prediction solution and 49.82% when compared to HEVC still picture coding.

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Control-Point Representation and Differential Coding Affine-Motion Compensation

Cited by 53 publications

References 32 publications

Recent Advances on HEVC Inter-Frame Coding: From Optimization to Implementation and Beyond

Recent Advances on HEVC Inter-Frame Coding: From Optimization to Implementation and Beyond

An Improved Fast Affine Motion Estimation Based on Edge Detection Algorithm for VVC

Light Field Image Coding Using High-Order Intrablock Prediction

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