The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
High efficiency video coding (HEVC) achieves a better coding efficiency compared with previous video coding standards. To enhance the intra coding efficiency, HEVC employs flexible coding unit structure as prediction unit (PU) sizes which are defined from 4×4 to 64×64 and plenty of prediction modes. These new features of intra prediction in HEVC improves coding efficiency, meanwhile, brings high computational...
The latest video coding standard HEVC (High Efficiency Video Coding) provides up to 35 intra prediction modes to achieve more accurate prediction. However, a larger number of prediction modes leads to higher encoding complexity. To accelerate the intra mode decision in HEVC, an improved algorithm based on numerical analysis of the neighboring reference samples of coding units is proposed. Four filters...
Scalable Video Coding (SVC), provides different resolutions, different video quality and different video streaming rate after once compression according to various requirements of users. The characteristic performance can solve a series of video transmission problems encountered in the current complex and heterogeneous network environment conveniently and effectively, and provide a highly efficient...
Rate control is one of essential techniques in video coding in order to ensure quality of pictures under constraint condition of bandwidth. The rate control algorithm consists of three components: group of pictures (GOP) level rate control, frame level rate control and basic unit level rate control. In this paper, the rate control algorithm at frame level and basic unit level is studied to improve...
High efficiency video coding (HEVC) standard, introduced by joint collaborative team on video coding (JCT-VC) is the newest international standard of video compression. This standard provides more compression and better video quality, compared to the previous standards such as H.264. The higher compression efficiency is obtained at the cost of an increase in the computational load. One of the portions...
To achieve high performance in object recognition, a high-level feature representation is play an essential role to transform a raw input data (low-level) into a new representation. Unsupervised feature learning is one of the most successful methods that is widely used in machine learning literatures for creating a high-level feature to improve the supervised learning problems. The main concept of...
The HEVC standard adopts varies of Prediction Unit (PU) modes to perform motion estimation (ME). And the mode with the least rate distortion (RD) cost is chosen as the best mode after transversally comparing all candidate modes, which can achieve the highest coding efficiency but require a high computation complexity. In this paper, a fast PU decision algorithm is proposed. Firstly, the correlation...
High Efficiency Video Coding (HEVC) is the newest standard of video coding being developed by JCT-VC. It flexibly uses quad-tree structure, which makes the encoding procedure more complex and time-consuming compared with H.264/AVC. For intra prediction, determining the optimal distribution of coding unit (CU) size requires huge computing time. In this paper, we propose a new fast CU size selection...
In this paper, we give a survey on mesh compression approaches of the past few years. Since this technique has gradually become mature, we not only have summarized the previous methods such as single-rate mesh compression and progressive mesh compression, but also review mesh compression methods with random accessibility. The classification for each kind of methods is given, and the trend of mesh...
In High Efficiency Video Coding (HEVC), the computational complexity has been increased so that an Early SKIP mode decision method is proposed by using coded block flag of an inter prediction unit (PU) to speed up mode decision with BD-bitrate increase. In this paper, we propose a fast SKIP mode decision algorithm to speed up PU mode decision for HEVC in a rate-distortion (RD) optimization sense....
Region-of-Interest (ROI) location information in videos has many practical usages in video coding field, such as video content analysis and user experience improvement. Although ROI-based coding has been studied widely by many researchers to improve coding efficiency for video contents, the ROI location information itself is seldom coded in video bitstream. In this paper, we will introduce our proposed...
3D-HEVC is the latest 3D video coding project of MPEG based on High Efficiency Video Coding (HEVC). The encoding complexity of it is remarkably high due to the coding units (CU) size decision process together with the rate distortion optimization (RDO) process. In this paper, we proposed a fast CU depth decision algorithm taking advantages of the interview correlations. With the CU depth correlation...
This paper proposes a fast mode decision algorithm for 3D High Efficiency Video Coding (3D-HEVC) depth intra coding. In the current 3D-HEVC design, it is observed that for most of the cases, full Rate-Distortion (RD) cost search of Bi-partition mode could be skipped since most coding units (CUs) of depth map are very flat or smooth while Bi-partition modes are designed for CUs with edge or sharp transition...
Gene regulation in eukaryotes is a very complicated and myriad procedure. It is a diverse action which include finding the protein coding regions, locating transcription factor binding sites, promoter identification and determination of cis and trans regulatory elements. Transcription factor binding prediction is very costly using experimental techniques. So computational methods can be used for prediction...
Event detection plays an essential role in video content analysis. On the other hand, according to our analysis, the coding structures in new video coding standard High Efficient Video Coding (HEVC) have a high correlation with video contents. Hence there is large potential to identify events by reusing coding structures in HEVC, which can save a huge amount of computational resources. In this paper,...
The new video coding standard, HEVC, achieves better compression performance relative to H.264 at the expense of a significant increase in computational complexity. It adopts coding tree structure, and implements partition and mode decision for each coding unit (CU) and prediction unit (PU). For intra coding, five levels of PUs from 64×64 to 4×4 should be searched and each PU selects one best mode...
High Efficiency Video Coding (HEVC) achieves high efficiency by introducing a new coding structure in adoption of coding unit (CU), prediction unit (PU) and transform unit (TU). However, it also imposes great computation burden on the mode decision of encoders. In this paper, we propose a fast CU depth decision scheme to reduce the encoder complexity for HEVC. Firstly, the relationship between rate-distortion...
Determining the best partitioning structure for a given Coding Tree Unit (CTU) is one of the most time consuming operations within the HEVC encoder. The brute force search through quadtree hierarchy has a significant impact on the encoding time of high definition (HD) videos. This paper presents a fast coding unit size decision-taking algorithm for intra prediction in HEVC. The proposed algorithm...
Basically, motion search is very time-consuming in the process of video coding. For surveillance videos, however, there exist a large amount of static background regions whose motion vectors actually are equal to zero. By utilizing the background and foreground information of coding units, this paper proposes a background-foreground division based search algorithm (BFDS) to accelerate the motion search...
H.264/AVC, the international video coding standard developed by ITU-T VCEG and ISO/IEC MPEG, is known to be more efficient than other standards. Higher compression is provided with the parameter block mode of H.264/AVC, but due to its low compression efficiency, researchers tend to ignore the algorithm's intra-prediction coding capability. This study examined this overlooked aspect to determine its...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.