2019 Picture Coding Symposium (PCS)最新文献_第4页

Point Cloud Coding: Adopting a Deep Learning-based Approach 点云编码:采用基于深度学习的方法

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954537

André F. R. Guarda, Nuno M. M. Rodrigues, F. Pereira

引用次数: 39

Adaptive QP with Tile Partition and Padding to Remove Boundary Artifacts for 360 Video Coding 自适应QP与瓷砖分割和填充去除边界伪影360视频编码

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954549

Yule Sun, Bin Wang, Lu Yu

引用次数: 1

Post Sample Adaptive Offset for Video Coding 后样本自适应偏移视频编码

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954544

Wang-Q Lim, H. Schwarz, D. Marpe, T. Wiegand

{"title":"Post Sample Adaptive Offset for Video Coding","authors":"Wang-Q Lim, H. Schwarz, D. Marpe, T. Wiegand","doi":"10.1109/PCS48520.2019.8954544","DOIUrl":"https://doi.org/10.1109/PCS48520.2019.8954544","url":null,"abstract":"In-loop filtering is an important task in video coding, as it refines both the reconstructed signal for display and the pictures used for inter-prediction. At the current stage of the Versatile Video Coding (VVC) standardization, there are three in-loop filtering procedures consisting of deblocking filter (DBF), sample adaptive offset (SAO) and adaptive loop filter (ALF). Among them, SAO is the simplest in-loop filtering process and highly effective in removing coding artifacts. It simply modifies decoded samples by conditionally adding an offset value to each sample after the application of the DBF. For this, a classification is applied for each sample location, which gives a partition of the set of all sample locations. After that, an offset value is added to all samples associated with each class. Therefore, the performance of SAO essentially relies on how its classification behaves. In this paper, we introduce a novel classification method for SAO. Based on this, we derive an additional SAO filtering process which we call post sample adaptive offset (PSAO). Experimental results show the effectiveness of our proposed PSAO filtering process. On average, 0.42%, 0.31% and 0.33% additional coding gains can be achieved on top of VTM-5.0 for all intra (AI), random access (RA) and low delay with B pictures (LB) configurations, respectively.","PeriodicalId":237809,"journal":{"name":"2019 Picture Coding Symposium (PCS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122483318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

GAN-based Image Compression Using Mutual Information Maximizing Regularization 基于互信息最大化正则化的gan图像压缩

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954548

Shinobu Kudo, Shota Orihashi, Ryuichi Tanida, A. Shimizu

{"title":"GAN-based Image Compression Using Mutual Information Maximizing Regularization","authors":"Shinobu Kudo, Shota Orihashi, Ryuichi Tanida, A. Shimizu","doi":"10.1109/PCS48520.2019.8954548","DOIUrl":"https://doi.org/10.1109/PCS48520.2019.8954548","url":null,"abstract":"Recently, image compression systems based on convolutional neural networks that use flexible nonlinear analysis and synthesis transformations have been developed to improve the restoration accuracy of decoded images. A method using a framework called a generative adversarial network [1] has been reported as one of the methods aiming to improve the subjective image quality [2][3]. It optimizes the distribution of restored images to be close to that of natural images; thus it suppresses visual artifacts such as blurring, ringing, and blocking. However, since methods of this type are optimized to focus on whether the restored image is subjectively natural or not, components that are not correlated with the original image are mixed in the coding features obtained from the encoder. Thus, even though the appearance looks natural, it may be subjectively seen as a different object from the original image or the impression may be changed.In this paper, we describe a method we have developed to maximize mutual information between the coding features and the restored images. This method, which we call \"regularization\", makes it possible to develop image compression systems that suppress appearance differences with subjective naturalness.","PeriodicalId":237809,"journal":{"name":"2019 Picture Coding Symposium (PCS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123931072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

A 3D Haar Wavelet Transform for Point Cloud Attribute Compression Based on Local Surface Analysis 基于局部表面分析的点云属性压缩三维Haar小波变换

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954557

Sujun Zhang, Wei Zhang, Fuzheng Yang, Junyan Huo

引用次数: 4

Extending Video Decoding Energy Models for 360° and HDR Video Formats in HEVC 扩展视频解码能量模型360°和HDR视频格式在HEVC

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954563

Matthias Kränzler, Christian Herglotz, A. Kaup

引用次数: 5

Weighted Multi-Hypothesis Inter Prediction for Video Coding 视频编码的加权多假设间预测

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954505

Martin Winken, Christian Bartnik, H. Schwarz, D. Marpe, T. Wiegand

引用次数: 0

Low Pixel Rate 3DoF+ Video Compression Via Unpredictable Region Cropping 低像素率3DoF+视频压缩通过不可预测的区域裁剪

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954501

Bin Wang, Yule Sun, Lu Yu

{"title":"Low Pixel Rate 3DoF+ Video Compression Via Unpredictable Region Cropping","authors":"Bin Wang, Yule Sun, Lu Yu","doi":"10.1109/PCS48520.2019.8954501","DOIUrl":"https://doi.org/10.1109/PCS48520.2019.8954501","url":null,"abstract":"Enhanced three degrees of freedom (3DoF+) video system enables both rotational and translational movements for viewers within a limited scene. It introduces interactive motion parallax that provides viewers with a more natural and immersive visual experience on head-mounted displays (HMDs). A large set of views are required to support 3DoF+ video system, hence huge data costs a tremendous amount of computation and bandwidth. In this paper, a method based on unpredictable region cropping is proposed to reduce the size of data. The proposed method can be separated into two steps: basic view selection and sub-image cropping. One or several views in the source view set are selected as basic views adaptively. The goal of the basic views is to predict the remaining views, and unpredictable regions are cropped to multiple rectangular sub-images. The basic views and the cropped sub-images, called to-be-coded views, are coded by using High Efficiency Video Coding (HEVC) standard. Experimental results show the proposed method can achieve up to 75.0% pixel-rate saving and improve the quality of rendered views by 1.5dB. The method of basic view selection was adopted by the moving picture experts group (MPEG) video subgroup as a tool for the first version of Test Model of Immersive Video (TMIV).","PeriodicalId":237809,"journal":{"name":"2019 Picture Coding Symposium (PCS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132073106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Content-gnostic Bitrate Ladder Prediction for Adaptive Video Streaming 自适应视频流的内容识别比特率阶梯预测

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954529

Angeliki V. Katsenou, J. Solé, D. Bull

引用次数: 23

Extended Transform Skip Mode and Fast Multiple Transform Set Selection in VVC VVC中扩展的变换跳过模式和快速多变换集选择

2019 Picture Coding Symposium (PCS) Pub Date : 2019-11-01 DOI: 10.1109/PCS48520.2019.8954540

Tung Nguyen, B. Bross, Paul Keydel, H. Schwarz, D. Marpe, T. Wiegand

{"title":"Extended Transform Skip Mode and Fast Multiple Transform Set Selection in VVC","authors":"Tung Nguyen, B. Bross, Paul Keydel, H. Schwarz, D. Marpe, T. Wiegand","doi":"10.1109/PCS48520.2019.8954540","DOIUrl":"https://doi.org/10.1109/PCS48520.2019.8954540","url":null,"abstract":"The Versatile Video Coding (VVC) development has adopted the possibility to bypass the transform when the transform block size is equal to 4×4 from its predecessor High Efficiency Video Coding (HEVC). This so-called Transform Skip Mode (TSM) results in increased encoding time when extending it to transform block sizes up to 32×32 while the compression efficiency improvement is for screen content only. This paper presents the so-called Unified MTS scheme that makes TSM for luma transform block sizes up to 32×32 possible without the disadvantage of excessive encoding time increase by incorporating the TSM with the existing Multiple Transform Set (MTS) technique. The Unified MTS scheme achieves compression efficiency improvements, in terms of BD-rate, of about −5.0% in the All-Intra configuration and −5.4% in the Random-Access configuration, respectively, for the screen content sequences of the used test set. Compared to the straightforward extension of TSM to transform block sizes up to 32×32, the encoding time is about 25% less in the All-Intra configuration and about 21% less in the Random-Access configuration, respectively, whereas the compression efficiency improvements are only 0.04% less in the All-Intra configuration, and 0.09% less in the Random-Access configuration, respectively. Relative to the anchor using TSM for 4×4 transform blocks only, the encoding time is the same for natural content and 3% higher for screen content.","PeriodicalId":237809,"journal":{"name":"2019 Picture Coding Symposium (PCS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121234759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11