检索结果-内蒙古大学图书馆

VVC intra coding Complexity Optimization Based on Early Skipping of the Secondary Transform

IEEE SIGNAL PROCESSING LETTERS 2024年 31卷 366-370页

作者： Wang, Yifan Feng, Shixuan Zhang, Wei Yang, Fuzheng Xidian Univ Sch Telecommun Engn Xian 710071 Peoples R China Peng Cheng Lab Artificial Intelligence Res Ctr Shenzhen 518055 Peoples R China

The new generation video coding standard, H.266/-VVC, brings performance gains while significantly increasing coding complexity. Most of the complexity optimization methods for intra coding focus on reducing the number of prediction modes entering the rate-distortion optimization, but there are few concerning the newly introduced secondary transform. This letter extends the scope of existing studies and provides valuable insights for intra coding complexity optimization based on early skipping of the secondary transform. Specifically, considering the distribution of residuals assessed by coefficients after the primary transform, we propose to skip the secondary transform when the residual variation is relatively flat or the distortion caused by zeroing high-frequency coefficients is significant. Based on this analysis, we establish two skip conditions through statistical analysis and enable efficient decision-making by skipping the unnecessary secondary transform. Experimental results demonstrate the effectiveness of our algorithm, achieving 3.84% and 10.29% reductions in encoding time with only 0.39% and 1.03% increases in Bjontegaard delta bit-rate compared to Fraunhofer Versatile Video Encoder (VVenC)'s medium preset, under random-access (RA) and all-intra (AI) configurations respectively.

关键词： Transforms Encoding Complexity theory Kernel Optimization Distortion Video coding Complexity optimization intra coding secondary transform versatile video coding

来源：评论

学校读者我要写书评

暂无评论

Efficient Level and Zero coding Methods for H.264/AVC Lossless intra coding

引用

IEEE SIGNAL PROCESSING LETTERS 2010年第1期17卷 87-90页

作者： Heo, Jin Ho, Yo-Sung GIST Sch Informat & Mechatron Kwangju 500712 South Korea

Since H.264/AVC was designed mainly for lossy video coding, the entropy coding methods in H.264/AVC are not appropriate for lossless video coding. Based on statistical differences of residual data in lossy and lossless coding, we develop efficient level and zero coding methods. Therefore, we design an improved context-based adaptive variable length coding (CAVLC) scheme for lossless intra coding by modifying the relative entropy coding parts in H.264/AVC. Experimental results show that the proposed method provides approximately 6.8% bit saving, compared with the H.264/AVC FRExt high profile.

关键词： CAVLC H264/AVC intra coding lossless video coding

来源：评论

学校读者我要写书评

暂无评论

Complexity scalable control algorithm for intra coding in H.264 under energy constraints

引用

High Technology Letters 2010年第3期16卷 274-279页

作者： Gao Xuejun Lam Kin Man ZhuoLi ShenLansun Signal and Information Processing Laboratory Beijing University of Technology Beijing 100124 P.R. China Centre for Signal Processing Department of Electronic and Information Engineering the Hong Kong Polytechnic University Kowloon Hong Kong P.R. China

In this paper, the complexity of intra coding is first analyzed so as to achieve a weight of complexity measurement for each intra mode. Then, a new complexity scalable control algorithm for intra coding in H. 264 is proposed, based on the rearrangement of the order of candidate modes and an efficient complexity allocation and control （CAAC） scheme at the macroblock （MB） level. The candidate modes of each MB are rearranged according to the local-edge information. Experimental results show that our proposed algorithm can make an appropriate cut-off point of the candidate modes sequence adaptively according to the current energy condition of a mobile device, so as to adjust the complexity at any level while maximizing the video quality, which can prolong the operational lifetime of the battery with minimum degradation in video quality.

关键词： complexity scalable control complexity allocation rearrangement of candidate modes intra coding H. 264 energy constraints

来源：评论

学校读者我要写书评

暂无评论

Homogeneity-based fast CU partitioning algorithm for HEVC intra coding

引用

ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH 2019年第3期22卷 706-714页

作者： Maazouz, Mohamed Batel, Noureddine Bahri, Nejmeddine Masmoudi, Nouri Univ Medea Fac Technol LSEA Res Lab Medea Algeria Univ Blida 1 Dept Elect Engn Blida Algeria Natl Sch Engn LETI Res Lab Sfax Tunisia

High Efficiency Video coding (HEVC) is a new video coding standard released as a successor for H.264/AVC. It expected to reduce by 50% the bitrate for the same perceptual quality. One of the major contributors to the higher compression performance of HEVC is the introduction of larger coding Units (CU) with recursive partitioning mechanisms. This encoding performance is accompanied by a high computational complexity, which makes it very difficult to achieve real-time encoding especially if we aim to implement this encoder on embedded platforms. In this context, this paper suggests a fast CU partitioning algorithm for intra-only (All intra) configuration. The proposal aims to early terminate CU partitioning for homogeneous regions in the video frame, or skip some depths for high textured regions. The decision of Split/Non-split is based on homogeneity classification algorithm, which allows us to avoid the test of the all depths in order to determine the best CU size. Experimental results confirm that the proposed approach can reduce up to 41% of encoding time in average for different video classes and can reach up to 58% for high homogenous texture video sequences. (C) 2018 Karabuk University. Publishing services by Elsevier B.V.

关键词： HEVC coding CU partitioning Complexity reduction intra coding

来源：评论

学校读者我要写书评

暂无评论

Fast Depth Decision with Enlarged coding Block Sizes for HEVC intra coding of 4K Ultra-HD Video

Fast Depth Decision with Enlarged Coding Block Sizes for HEV...

引用

IEEE International Workshop on Signal Processing Systems (SiPS)

作者： Wei, Rujun Xie, Rong Zhang, Liang Song, Li Shanghai Jiao Tong Univ Inst Image Commun & Network Engn Shanghai Peoples R China Cooperat Medianet Innovat Ctr Shanghai Peoples R China

ISBN: (纸本)9781467396042

High Efficiency Video coding (HEVC), the latest video coding standard, achieves significantly better compression performance than the previous coding standards, especially for high resolution (2K, 4K, etc.) video coding. intra frame coding adopts a flexible quad-tree coding block structure to get the best coding unit partition, which results in extremely high computational complexity. In this paper, a fast depth decision algorithm with enlarged block sizes is proposed to speed up HEVC intra coding for 4K Ultra-HD video. Firstly, sizes of coding Unit (CU), Prediction Unit (PU) and Transform Unit (TU) are enlarged in the modified coding Tree Unit structure to reduce coding complexity. Then, gradient information of an image is exploited for early CU termination to optimize CU partition process. Experimental results of several 4K video sequences show that the proposed algorithm can achieve about 56% encoding time reduction compared to HEVC reference software while maintaining the same encoding performance.

关键词： HEVC intra coding 4K Ultra-HD video Enlarged block sizes Depth decision Gradient information

来源：评论

学校读者我要写书评

暂无评论

SPEEDING UP HEVC intra coding BASED ON TREE DEPTH INTER-LEVELS CORRELATION STRUCTURE

SPEEDING UP HEVC INTRA CODING BASED ON TREE DEPTH INTER-LEVE...

引用

21st European Signal Processing Conference (EUSIPCO)

作者： da Silva, Thaisa L. Agostini, Luciano V. da Silva Cruz, Luis A. Inst Telecomunicacoes Coimbra Portugal Univ Coimbra Dept Elect & Comp Engn Coimbra Portugal Federal Univ Pelotas Grp Architectures & Integrated Circuits Pelotas Brazil

ISBN: (纸本)9781479936878

The encoding efficiency of the High Efficiency Video coding (HEVC) standard is considerably higher than that of its predecessors. The intra coding method adopted by this new standard includes a larger number of prediction directions than those of its preceding standards namely H. 264/AVC. This improvement contributed to enhance the encoding efficiency, but carried with it a much larger computational complexity. This paper presents an algorithm to speed-up the intra mode decision procedure through the exploitation of inter-level correlation observed between the predominant edge orientation of the current PU and those of the PUs already coded at lower levels of the encoding quadtree. Experimental results show that the proposed algorithm provides a decrease of up to 39.6% in the HEVC intra coding processing time, with a small increase in bitrate (avg. 1.2%) and a negligible reduction in PSNR values.

关键词： intra coding High Efficiency Video coding (HEVC) hierarchical structure inter-levels correlation computational complexity

来源：评论

学校读者我要写书评

暂无评论

Fast HEVC intra coding Algorithm Based on Otsu's Method and Gradient

Fast HEVC Intra Coding Algorithm Based on Otsu's Method and ...

引用

11th IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB)

作者： Wang, Xuanjing Xue, Yonglin Tsinghua Univ Dept Elect Engn Beijing 100084 Peoples R China Tsinghua Natl Lab Informat Sci & Technol Beijing Peoples R China Tsinghua Univ Res Inst Informat & Technol Beijing Peoples R China

ISBN: (纸本)9781467390446

High Efficiency Video coding (HEVC), the newest video coding standard established, aims to significantly improve the compression performance compared with H.264/AVC and other existing video coding standards. In the intra coding of HEVC, this improvement is achieved by adopting the coding tree unit (CTU) structure and providing up to 35 prediction modes for each prediction unit (PU). However, the computational complexity is greatly increased due to these new techniques. In this paper, we propose a fast coding unit (CU) size decision and PU mode decision algorithm for HEVC intra coding to reduce the time consumption. Since CU sizes are highly correlated to the texture detail and variance information of the largest coding unit (LCU), we introduce the Otsu's method to measure the texture complexity of each LCU and skip some CU depth levels. Meanwhile, as the prediction modes always correspond to gradient directions, we apply improved Sobel masks to measure gradient directions of PUs and reduce some candidate intra modes. Experimental results show that our proposed algorithm can save 33% time consumption on average with negligible loss of coding efficiency.

关键词： HEVC intra coding Otsu's method Mode decision Video coding and processing Performance evaluation

来源：评论

学校读者我要写书评

暂无评论

A FAST intra coding ALGORITHM FOR SPATIAL SCALABILITY IN SHVC 25

A FAST INTRA CODING ALGORITHM FOR SPATIAL SCALABILITY IN SHV...

引用

25th IEEE International Conference on Image Processing (ICIP)

作者： Lu, Xin Yu, Chang Gu, Yanfeng Martin, Graham Harbin Inst Technol Sch Elect & Informat Engn Harbin Heilongjiang Peoples R China Univ Warwick Dept Comp Sci Coventry W Midlands England

ISBN: (纸本)9781479970612

Scalable High Efficiency Video coding (SHVC) provides high compression efficiency at the expense of considerable computational complexity. In this paper, a fast algorithm is proposed to reduce the computational complexity of SHVC intra coding. The coding depth information, texture complexity, and spatio-temporal correlation are jointly used to achieve a faster depth decision process. The mode dependency between the base layer and the enhancement layer is combined with the temporal correlation to simplify the mode decision process. Experimental results demonstrate that the proposed scheme saves encoding time by up to 59% compared with the SHM12.0 encoder with negligible degradation in Rate Distortion (RD).

关键词： SHVC intra coding Fast algorithm

来源：评论

学校读者我要写书评

暂无评论

Low-Complexity intra coding Algorithm Based on Convolutional Neural Network for HEVC

Low-Complexity Intra Coding Algorithm Based on Convolutional...

引用

International Conference on Information and Computer Technologies (ICICT)

作者： Katayama, Takafumi Kuroda, Kazuki Shi, Wen Song, Tian Shimamoto, Takashi Tokushima Univ Grad Sch Adv Technol & Sci Tokushima 7708506 Japan Tokushima Univ Grad Sch Engn Inst Sci & Technol Comp Syst Engn Tokushima 7708506 Japan

ISBN: (纸本)9781538653845

In this paper, we propose a fast coding unit (CU) size decision algorithm for high efficiency video coding (HEVC) based on convolutional neural network. The proposed fast algorithm contributes to decrease no less than two CU partition modes in each coding tree unit for full rate-distortion optimization processing, thereby reducing the encoder hardware complexity. Moreover, our algorithm use only texture information and it does not depend on the correlations among CU depths or spatially nearby CUs. It is friendly to the parallel processing and it can improve the pipeline process of RDO. The proposed algorithm is implemented in the reference software of HEVC (HM16.7). The simulation results show that the proposed algorithm can achieve over 67.3% computation complexity reduction comparing to the original HEVC algorithm.

关键词： High Efficiency Video coding (HEVC) intra coding convolutional newral network (CNN)

来源：评论

学校读者我要写书评

暂无评论

Content Adaptive Prediction Unit Size Decision Algorithm for HEVC intra coding

Content Adaptive Prediction Unit Size Decision Algorithm for...

引用

29th Picture coding Symposium (PCS)

作者： Tian, Guifen Goto, Satoshi Waseda Univ Grad Sch Informat Prod & Syst Kitakyushu Fukuoka Japan

ISBN: (纸本)9781457720482

The quadtree based picture partition scheme in HEVC contributes to significant coding efficiency improvement, especially for high resolution videos. But encoding complexity also increases dramatically. This paper brings forward a two-stage prediction unit size decision algorithm to speed up the original intra coding in HEVC. In the pre-stage, texture complexity of down-sampled largest coding unit (LCU) and its four sub-blocks are analyzed according to video content, to filter out unnecessary prediction units for both the LCU and its sub-blocks. Secondly, during intra coding, prediction unit sizes of encoded neighboring blocks are utilized to skip small prediction unit candidates for current block. Experimental results show that proposed algorithm can speed up original HEVC intra coding by a factor of up to 73.7% and by averagely 44.91% for 4kx2k video sequences. Meanwhile, the peak signal-to-noise ratio degradation is less than 0.04dB and bit-rate stays almost the same compared with that of original HEVC intra coding.

关键词： texture complexity prediction unit intra coding HEVC

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：