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首页> 外文期刊>Journal of visual communication & image representation >Complexity-based intra frame rate control by jointing inter-frame correlation for high efficiency video coding
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Complexity-based intra frame rate control by jointing inter-frame correlation for high efficiency video coding

机译：通过联合帧间相关性基于复杂度的帧内速率控制，实现高效视频编码

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摘要

Rate control is of great significance for the High Efficiency Video Coding (HEVC). Due to the high efficiency and low complexity, the R-lambda model has been applied to the HEVC as the default rate control algorithm. However, the video content complexity, which can help improve the code efficiency and rate control performance, is not fully considered in the R-lambda model. To address this problem, an intra-frame rate control algorithm, which aims to provide improved and smooth video quality, is developed in this paper by jointly taking into consideration the frame-level content complexity between the encoded intra frames and the encoded inter frame, as well as the CTU-level complexity among different CTUs in texture-different regions for intra-frame. Firstly, in order to improve the rate control efficiency, this paper introduces a new prediction measure of content complexity for CTUs of intra-frame by jointly considering the inter-frame correlations between encoding intra frame and previous encoded inter frames as well as correlations between encoding intra frame and previous encoded intra frame. Secondly, a frame-level complexity-based bit-allocation-balancing method, by jointly considering the inter-frame correlation between intra frame and previous encoded inter frame, is brought up so that the smoothness of the visual quality can be improved between adjacent inter- and intra-frames. Thirdly, a new region-division and complexity-based CTU-level bit allocation method is developed to improve the objective quality and to reduce PSNR fluctuation among CTUs in intra-frame. In the end, related model parameters are updated during the encoding process to increase rate control accuracy. As a result, as can be seen from the extensive experimental results that compared with the state-of-the-art schemes, the video quality can be significantly improved. More specifically, up to 10.5% and on average 5.2% BD-Rate reduction was achieved compared to HM16.0 and up to 2.7% and an average of 2.0% BD-Rate reduction was achieved compared to state-of-the-art algorithm. Besides, a superior performance in enhancing the smoothness of quality can be achieved, which outperforms the state-of-the-art algorithms in term of flicker measurement, frame and CTU-wise PSNR, as well as buffer fullness. (C) 2016 Elsevier Inc. All rights reserved.
机译：速率控制对于高效视频编码（HEVC）具有重要意义。由于高效和低复杂度，R-lambda模型已作为默认的速率控制算法应用于HEVC。但是，在R-lambda模型中并未完全考虑视频内容的复杂性，这可以帮助提高代码效率和速率控制性能。为了解决这个问题，本文通过结合编码的帧内帧和编码的帧间帧之间的帧级内容复杂性，开发了一种旨在提供改进和流畅的视频质量的帧内速率控制算法，以及帧内纹理不同区域中不同CTU之间的CTU级别复杂性。首先，为了提高码率控制效率，结合编码内帧与先前编码帧间的帧间相关性以及编码间的相关性，提出了一种新的帧内CTU内容复杂度预测方法。帧内和先前编码的帧内。其次，提出了一种基于帧级复杂度的比特分配均衡方法，通过综合考虑帧内帧与先前编码的帧间帧之间的帧间相关性，可以提高相邻帧间的视觉质量的平滑度。 -和帧内。第三，提出了一种新的基于区域划分和复杂度的CTU级比特分配方法，以提高目标质量并减少帧内CTU之间的PSNR波动。最后，在编码过程中更新相关的模型参数，以提高速率控制的准确性。结果，从广泛的实验结果可以看出，与最新方案相比，视频质量可以得到显着改善。更具体地，与最新算法相比，与HM16.0相比，BD-Rate降低了多达10.5％，平均降低了5.2％，与最新算法相比，BD-Rate降低了2.0％。 。此外，在提高质量的平滑度方面，可以实现卓越的性能，在闪烁测量，帧和CTU方式的PSNR以及缓冲区充满度方面，这优于最新的算法。 （C）2016 Elsevier Inc.保留所有权利。

著录项

  • 来源
  • 作者

    Zhou Mingliang; Zhang Yongfei; Li Bo; Hu Hai-Miao;

  • 作者单位

    Beihang Univ, Sch Comp Sci & Engn, Beijing Key Lab Digital Media, Beijing 100191, Peoples R China;

    Beihang Univ, Sch Comp Sci & Engn, Beijing Key Lab Digital Media, Beijing 100191, Peoples R China|Beihang Univ, State Key Lab Virtual Real Technol & Syst, Beijing 100191, Peoples R China;

    Beihang Univ, Sch Comp Sci & Engn, Beijing Key Lab Digital Media, Beijing 100191, Peoples R China|Beihang Univ, State Key Lab Virtual Real Technol & Syst, Beijing 100191, Peoples R China;

    Beihang Univ, Sch Comp Sci & Engn, Beijing Key Lab Digital Media, Beijing 100191, Peoples R China|Beihang Univ, State Key Lab Virtual Real Technol & Syst, Beijing 100191, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    HEVC; Complexity; Intra-frame; R-lambda model; Region-based; Quality smoothness;

    机译：HEVC;复杂度;帧内;R-lambda模型;基于区域;质量平滑度;

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