Coding efficiency improvements beyond HEVC with known tools

Alshin, Alexander; Alshina, Elena; Budagavi, Madhukar; Choi, Kiho; Min, Junghye; Mishourovsky, Michael; Piao, Yinji; Saxena, Ankur

doi:10.1117/12.2193683

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Similarly, Alshin [173] proposed a pixel-wise motion refinement method called Bi-directional Optical flow (BIO), by combining optical flow concept and high accuracy gradients evaluation. As a combination of block-and pixel-wise MC, this method can handle tiny movements within a block effectively, and hence, remarkable coding gain can be In [174], a strict mathematical derivation to BIO was provided. [175] extended BIO to PUs with two unidirectional reference blocks, with a median filtering to MV shifting values of neighboring pixels to get the robust MV for each sample while a PU level pixel-wise motion refinement to further improve the coding performance.…”

Section: ) Pixel-based Schemesmentioning

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.

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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: ) Pixel-based Schemesmentioning

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.

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show abstract

“…Formula (18) and (19) calculate RS i and RS j with different i and j. Formula (20) and (21) are used to calculate the value of i and j, namely, the corresponding value of i and j when RS i and RS j achieve to the minimum.…”

Section: Residual Analyzermentioning

confidence: 99%

“…The quotients were encoded directly, and the remainders were encoded as xed-length after redundancies were removed according to the feature of Hadamard transform [18]. While H.265/HEVC [19][20] is able to obtain 50% higher coding ef ciency than H.264/AVC, that is to say, 50% bit rate saving when the same image quality acquired, but the encoding complexity is much higher [21].…”

Section: Introductionmentioning

confidence: 99%

Improved Adaptive Transform for Residue in H.264/AVC Lossless Video Coding

Yang²,

Zhang

et al. 2016

Automatika

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Original scienti c paper The H.264/AVC was designed mainly for lossy video coding, the lossless coding of H.264 use bypass mode for DCT and quantization. Although sample-by-sample DPCM improves performance of coding, the bene t is limited in intra. In this paper, a new adaptive transform is proposed based on the character of 4×4 block residual coef cient's distribution, which can be used both in intra and inter coding. The greatest strength of the proposed transform is the decorrelation without in ation versus dynamic range of input matrix. Due to the random distribution of residual coef cients, a speci c transform is hard to play a positive impact on them. Therefore, several transforms of different directions will be implemented simultaneously, and the most ef cient one will be determined by a proposed mechanism. Then, by means of statistic method, a new scan order is designed for CAVLC entropy encoder, cooperating with corresponding transform. The simulation results show that based on the fast algorithm of proposed method, the bit saving achieves about 7.41% bit saving in intra coding and 10.47% in inter, compared with H.264-LS.

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Mode-dependent pixel-wise motion refinement for HEVC

Zhao

Zhang

et al. 2016

2016 IEEE International Conference on Image Processing (ICIP)

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Coding efficiency improvements beyond HEVC with known tools

Cited by 6 publications

References 7 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

Improved Adaptive Transform for Residue in H.264/AVC Lossless Video Coding

Mode-dependent pixel-wise motion refinement for HEVC

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