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Adaptive Enhanced Global Intra Prediction for Efficient Video Coding in Beyond VVC
Junyan Huo;Yanzhuo Ma;Zhenyao Zhang;Hongli Zhang;Hui Yuan;Shuai Wan;Fuzheng Yang
IEEE Transactions on Circuits and Systems for Video Technology
Year: 2025 | Early Access Article |
Global intra prediction (GIP), including intra-block copy and template matching prediction (TMP), exploits the global correlation of the same image to improve the coding efficiency. In Beyond VVC, TMP uses template matching to determine the reference blocks for efficient prediction. There usually exists an error between the coding block and reference blocks, caused by the content mismatch or the c...Show More
A Transformer-Based Intra Luma Enhancement for H.266/VVC
2024 Picture Coding Symposium (PCS)
Year: 2024 | Conference Paper |
Intra prediction is essential in reducing spatial domain correlation in video coding. To improve intra prediction accuracy, we introduce a transformer-based quality enhancement method aiming atimproving the luma quality of reconstructed coding tree units (CTUs). Our transformer-based model, namely Enhanceformer, utilizes multi-head attention for comprehensive feature extraction across multiple sta...Show More
Refined Chroma From Luma Prediction in AV1 Based on Color Component Grouping
Junyan Huo;Zhenyao Zhang;Jiarun Song;Yanzhuo Ma;Fuzheng Yang
Chroma from luma (CfL) in AOMedia Video 1 (AV1) utilizes the correlation between color components to derive the predicted chroma from the reconstructed luma. The mean of the predicted chroma, i.e., dc, is set to the chroma average of the neighboring regions. Since the neighboring regions have limited reference samples, the distribution of the coding block is hard to be predicted from the neighbori...Show More
Adaptive Chroma Block Vector Derivation from Luma for Screen Content Coding
ICASSP 2024 - 2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Year: 2024 | Conference Paper |
Intra Block Copy (IBC) and Intra Template Matching Prediction (IntraTMP) are two efficient algorithms to sufficiently exploit the correlation in the same picture. Block Vector (BV) is used to represent the displacement between the current block and its reference within the same picture. The BV information of luma can be employed to help the chroma coding efficiently. Based on this feature, an adap...Show More
Joint Rate-Distortion Optimization for Video Coding and Learning-Based In-Loop Filtering
Mingyi Yang;Junyan Huo;Xile Zhou;Wenhan Qiao;Shuai Wan;Hao Wang;Fuzheng Yang
Learning-based in-loop filters (ILFs) have recently been widely deployed in the video codec to remove compression artifacts and to obtain better-quality reconstructed videos. However, in the existing codec, the impact of the learning-based ILF is not considered in the Rate-Distortion optimization (RDO) process. With the learning-based ILF, the set of coding parameters selected by the conventional ...Show More
An Adaptive Determination Method for Gop-size and Qp Offset in Versatile Video Coding
2023 9th International Conference on Computer and Communications (ICCC)
Year: 2023 | Conference Paper |
In the latest and most advanced video coding standard, Versatile Video Coding (VVC), the configuration parameters of the size of Groups of Pictures (GOP) and the offset of Quantization Parameter (QP) in a GOP significantly impact the compression efficiency. However, typical VVC encoder implementations assume fixed GOP-size and QP offset for encoding video sequences, which is inefficient for video ...Show More
Enhancing Video Encoding for Cloud Virtual Reality Gaming Based on User Types
Kai Song;Haonan Sun;Junyan Huo;Fuzheng Yang;Kun Yang;Gaoxing Chen
2023 IEEE International Conference on Visual Communications and Image Processing (VCIP)
Year: 2023 | Conference Paper |
Cloud Virtual Reality (VR) gaming is a novel technology that allows users to enjoy complex games on their thin clients by offloading the graphics rendering to cloud servers. The thin clients only need to perform basic decoding functions, which reduces the hardware requirements and costs. However, cloud VR gaming also faces the challenge of high bandwidth consumption when transmitting high-resoluti...Show More
Adaptive Chroma Prediction Based on Luma Difference for H.266/VVC
Cross-component chroma prediction plays an important role in improving coding efficiency for H.266/VVC. We use the differences between reference samples and the predicted sample to design an attention model for chroma prediction, namely luma difference-based chroma prediction (LDCP). Specifically, the luma differences (LDs) between reference samples and the predicted sample are employed as the inp...Show More
Satellite Component Semantic Segmentation: Video Dataset and Real-Time Pyramid Attention and Decoupled Attention Network
Yadong Shao;Aodi Wu;Shengyang Li;Leizheng Shu;Xue Wan;Yuanbin Shao;Junyan Huo
High-accuracy and real-time satellite component semantic segmentation can locate the key satellite components, such as solar panels, to be operated in on-orbit services, which is of great significance for navigation and control. However, to accomplish the above aim, two main challenges remain unsolved. First, satellite component semantic segmentation algorithms require a large number of images for...Show More
Fast Rate-Distortion Optimization for Depth Maps in 3-D Video Coding
IEEE Transactions on Broadcasting
Cited by: Papers (11)
To ensure the fidelity of virtual views, rate-distortion optimization (RDO) criterion for the 3D extension of the High Efficiency Video Coding (3D-HEVC) is well designed, in which the synthesized view distortion (SVD) is introduced to derive the rate-distortion (RD) cost. To obtain accurate SVDs, the rendering operation is employed which demands a fairly high computational complexity. To address t...Show More
Unified Matrix Coding for NN Originated MIP in H.266/VVC
Junyan Huo;Yu Sun;Haixin Wang;Shuai Wan;Fuzheng Yang;Ming Li
ICASSP 2022 - 2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Year: 2022 | Conference Paper |
Cited by: Papers (3)
Matrix-based Intra Prediction (MIP) is an effective coding algorithm in H.266/Versatile Video Coding (VVC) which is originated by Neural Networks (NN). With the requirement of low complexity, MIP is conducted by a matrix-vector multiplication. To handle with the diversity of video content, 30 matrices are trained and stored to derive predicted samples. Since matrices from training are usually floa...Show More
Unified Cross-Component Linear Model in VVC Based on a Subset of Neighboring Samples
Junyan Huo;Hongqing Du;Xinwei Li;Shuai Wan;Hui Yuan;Yanzhuo Ma;Fuzheng Yang
To compress industrial video content efficiently, H.266/Versatile Video Coding (VVC) introduces cross-component linear model (CCLM) prediction as a new coding tool, in which chroma components are predicted from the luma component based on a linear model. In this article, we propose a subset-based CCLM (S-CCLM), in which the model parameters are derived based on a subset of neighboring samples. To ...Show More
Improved Chroma from Luma Prediction in AV1 Based On Virtual Chroma Block Generation
Junyan Huo;Menglin Zhang;Wenhan Qiao;Fuzheng Yang;Hui Su;Debargha Mukherjee
2021 IEEE International Conference on Multimedia and Expo (ICME)
Year: 2021 | Conference Paper |
Cited by: Papers (4)
Chroma from Luma (CfL) prediction is an efficient coding tool in AV1 which builds chroma prediction by implementing a linear model on luma pixels. To avoid transmission, the off-set factor in the linear model is set to the average of neighboring chroma pixels. An improved CfL algorithm is proposed to derive the offset factor based on a virtual chroma block. Such a block is constructed by using the...Show More
Hybrid Distortion-Based Rate-Distortion Optimization and Rate Control for H.265/HEVC
Mean squared error (MSE) is adopted as the distortion metric for the rate-distortion optimization (RDO) and rate control (RC) in most of the existing video coding standards, e.g., H.265/High-Efficiency Video Coding (HEVC) and H.264/Advanced Video Coding (AVC), because the pixel-wise MSE can represent the image fidelity efficiently. As videos are usually used for visual enjoyment, recently, researc...Show More
Point cloud is a main representation of 3D scenes. It is widely applied in many fields including autonomous driving, heritage reconstruction, virtual reality and augmented reality. The data size of this type of media is massive since it contains numerous points with each associated with a large amount of information including geometric coordinate, color, reflectance, and normal. It is thus of grea...Show More
A Fidelity-Assured Rate Distortion Optimization Method for Perceptual-Based Video Coding
2019 IEEE International Conference on Image Processing (ICIP)
Year: 2019 | Conference Paper |
Cited by: Papers (3)
Rate-distortion optimization (RDO) is one of the essential method to improve the video coding efficiency. The main target of RDO is to find the optimal tradeoff between the reconstructed video quality and encoding rate. In traditional video coding standards, e.g. the emerging H.266/Versatile Video Coding(VVC), the H.265/High Efficiency Video Coding (HEVC) and H.264/Advanced Video Coding (AVC), sum...Show More
Fine Virtual View Distortion Estimation Method for Depth Map Coding
IEEE Signal Processing Letters
Cited by: Papers (8)
In three-dimensional (3-D) video coding systems, depth maps represent the geometric information of a 3-D scene. Since depth maps are not displayed to viewers but to generate virtual views, the quality of depth maps needs to be measured by its effect on the virtual view quality, which is indicated by the virtual view distortion (VVD) in depth map coding. In this letter, a fine VVD estimation method...Show More
Novel 3DV Coding Scheme with Down-/Up-sampling and Asymmetrical Prediction
Xiang Ma;Junyan Huo;Yilin Chang;Guangliang Ren;Ying Chen;Li Zhang
2012 IEEE International Conference on Multimedia and Expo Workshops
Year: 2012 | Conference Paper |
This paper proposes a novel three dimensional video (3DV) coding scheme, in which down-/up-sampling filters and asymmetrical prediction (ASP) are involved into the coding system. By using of the down-/up-sampling filters, the 3DV data volume requirement of the decoding capability limitations can be well satisfied. To further improve the coding efficiency, ASP is proposed which enables the inter-vi...Show More
Efficient Prediction Structure for Key Pictures in Multiview Video Coding
2011 Symposium on Photonics and Optoelectronics (SOPO)
Year: 2011 | Conference Paper |
Compared to simulcast, the utilization of inter-view prediction at key pictures can dramatically improve the compression efficiency of multiview video coding (MVC). The reconstructed key picture in previous adjacent view is used as the inter-view reference picture of the key picture in the current coding view. The efficiency of inter-view prediction may deteriorate due to the existence of mismatch...Show More
Model-Based Joint Bit Allocation Between Texture Videos and Depth Maps for 3-D Video Coding
In 3-D video coding, texture videos and depth maps need to be jointly coded. The distortion of texture videos and depth maps can be propagated to the synthesized virtual views. Besides coding efficiency of texture videos and depth maps, joint bit allocation between texture videos and depth maps is also an important research issue in 3-D video coding. First, we present comprehensive analyses on the...Show More
Fine-Granular Motion Matching for Inter-View Motion Skip Mode in Multiview Video Coding
As motion of neighboring views is highly correlated in multiview video systems, the inter-view motion skip mode has been proposed to improve the efficiency of multiview video coding (MVC) by reusing the motion information of neighboring views. To fully exploit the inter-view motion correlation, a fine-granular motion matching algorithm for the motion skip mode is presented in this paper. The propo...Show More
A Flexible Reference Picture Selection Method for Spatial DIRECT Mode in Multiview Video Coding
2008 Congress on Image and Signal Processing
Year: 2008 | Conference Paper |
The motion information of the macroblock signaled as the spatial DIRECT mode can be derived from the neighboring blocks. The closest reference picture in the reference picture list used by the neighboring blocks is selected as the reference picture of the macroblock. Both temporal and interview reference pictures are put into the reference picture list in order to improve the coding efficiency in ...Show More
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