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The second generation Audio-video Coding Standard (AVS2) is the latest video standard currently under the development of Audio-video Coding Standard (AVS) Workgroup of China for achieving higher coding efficiency than previous (AVS1). In intra luminance prediction of AVS2, the AVS2 video encoder has to compute the rate-distortion optimization (RDO) of 9 selected candidate prediction modes in order...
The demands for high quality multimedia contents and the advent of the Ultra High Definition (UHD) resolution have motivated the development of the High Efficiency Video Coding (HEVC) standard, which outperforms prior standards by up to 50% in terms of coding efficiency. This improvement, however, involves higher computational complexity in the encoder side, making it essential for realtime encoders...
High Efficiency Video Coding (HEVC) is an ongoing standard, which is an extension of H.264/AVC which is the latest coding standard. In HEVC encoder an exhaustive search method is employed to select the best mode for each macro block which consumes more encoding time. Rate and Distortion tradeoff attained for encoding each macroblock introduces more computation complexity. Although, HEVC has better...
Many video coding standards, including the state-of-the-art High Efficiency Video Coding (HEVC) standard, employ Motion Estimation (ME) at sub-pel precision level to improve the prediction accuracy. However, interpolation and additional Motion Vector (MV) search associated with sub-pel ME result in increased computational complexity. In this paper, an algorithm for fast ME is proposed based on neighbouring...
MV-HEVC is a 3D extension of the High Efficiency Video Coding (HEVC) standard, which is developed to improve the coding efficiency of multi-view video. However, this improved efficiency leads to greater computational complexity. Recently, how to reduce the encoding time for multi-view coding is becoming a hot issue in real-time applications. In this paper, a fast coding unit (CU) decision algorithm...
The H.264/AVC video coding standard is used in a wide range of applications from video conferencing to high-definition TV. Compared to the previous standard, the H.264/AVC has significantly better performance in terms of PSNR and visual quality at the same bit rate. It uses a complex mode decision technique based on rate-distortion optimization (RDO). Therefore, this technique introduces a high computational...
This paper proposes a fast intra prediction algorithm for the High Efficiency Video Coding (HEVC). HEVC has 35 modes, such as DC mode, Planar mode, and 33 angular modes for the intra-prediction. To reduce the complexity and to support fast decision for intra prediction, this paper proposes a hierarchical mode decision method (HMD). The proposed HMD mainly focuses on how to reduce the number of prediction...
High Efficiency Video Coding (HEVC) is the next generation video compression standard providing significant coding performance. It adopts 35 intra prediction modes with larger CU size to improve the intra encoding efficiency, so that cause a high computational complexity. In this paper, two fast intra-prediction algorithms are proposed to reduce the number of candidate modes for rate-distortion (RD)...
In this paper, we propose an intra prediction algorithm for High Efficiency Video Coding (HEVC) to improve its coding efficiency. In the suggested technique, in addition to the standard intra prediction we also incorporate some of the partial differential equations (PDEs) based inpainting modes into HEVC for intra prediction. The experimental results reveal that average 4.2% BDBR reduction can be...
To improve the coding efficiency of intra frame, a quad tree-based variable block size coding structure which is flexible to adapt to various texture characteristics of images and up to 35 intra prediction modes are adopted in the latest High Efficiency Video Coding (HEVC) standard. To further alleviate the encoder computation load, this paper proposes a fast intra mode decision algorithm based on...
The latest High Efficiency Video Coding (HEVC) standard could achieve the highest coding efficiency compared with all existing video coding standards. However, the computational complexity is increased dramatically because all the possible combinations of the mode candidates are calculated in order to find the optimal rate distortion (RD) cost using Lagrange multiplier. In order to save the coding...
Compared with H.264/AVC, the newly published High Efficiency Video Coding (HEVC) standard improves the intra prediction by introducing much more prediction modes and novel techniques, which brings great computational burden. Although the rough mode decision (RMD) scheme in HEVC provides a way to speed up the process, it does not consider the similarity of neighboring modes to reduce the number of...
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...
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...
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...
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...
This paper proposes a fast hardware friendly intra block size selection algorithm with simple gradient calculations and the bottom-up structure to solve the high computational demand of intra prediction in the latest HEVC (High Efficiency Video Coding) standard. The simulation results show that the proposed algorithm can save 57.3% encoding time in average for all-intra main case compared to the default...
The new High Efficiency Video Coding (HEVC) standard is achieving higher encoding efficiency when compared to its predecessors such as H.264/AVC. One of the factors responsible to this improvement is the intra prediction method, which introduces a larger number of prediction directions resulting in an enhanced rate-distortion (RD) performance at the cost of a higher computational complexity. This...
High Efficiency Video Coding (HEVC), a successor to H.264, is the next generation video compression standard. To enhance the coding efficiency of video frames, 35 intra prediction modes adopted in Prediction Unit (PU) from 4×4 to 64×64 of HEVC. However, the improvement is based on the cost of rapid increased complexity performance loss. This paper proposed a Pixel Gradient Statistics (PGS) and Mode...
In this paper, a new fast encoding algorithm based on an efficient motion estimation (ME) process is proposed to accelerate the encoding speed of the scalable video coding standard. Through analysis of the ME process performed in the enhancement layer, we discovered that there are redundant MEs and some MEs can simply be unified at the fully overlapped search range (FOSR). In order to make the unified...
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