HEVC HM 16 includes a Coding Unit (CU) level perceptual quantization technique named AdaptiveQP. AdaptiveQP adjusts the Quantization Parameter (QP) at the CU level based on the spatial activity of samples in the four constituent N×N sub-blocks of the luma Coding Block (CB), which is contained within a 2N×2N CU. In this paper, we propose C-BAQ, which, in contrast to AdaptiveQP, adjusts the CU le...

The using of characteristics of the human visual system (HVS) can significantly improve the efficiency of video coding process. Enhanced coding processes take into account the high spatial variability of HVS in sampling, coding and understanding of visual information. The highest visual sensitivity is at the point of fixation and decreases rapidly with distance from that point. Foveated image a...

A fast coding unit (CU) decision method is proposed for high efficiency video coding (HEVC) by determining early the CU sizes based on coding tree pruning. One of the most effective, a newly introduced concept in HEVC, is variable CU size. In determining the best CU size, the reference encoder of the HEVC tests every possible CU size in order to estimate the coding performance of each CU define...

Despite its relative robustness, subjective video quality evaluation is a time-consuming and costly process. Alternatives are required therefore to simplify visual quality estimation, particularly in the case of new video formats. This paper presents an analysis of full reference quality metrics focused on Ultra High Definition sequences, encoded with H.265/High Efficiency Video Coding. After e...

This paper addresses the issue of cell loss and its consequent effect on video quality in a packet video system, and examines possible compensative measures. In the system's enconder, adaptive spectral separation is used to develop a two-layer coding scheme comprising a high priority layer to carry essential video data and a low priority layer with data to enhance the video image. A two-step er...

High efficiency video coding- (HEVC-) based 3D video coding (3D-HEVC) developed by joint collaborative team on 3D video coding (JCT-3V) for multiview video and depth map is an extension of HEVC standard. In the test model of 3D-HEVC, variable coding unit (CU) size decision and disparity estimation (DE) are introduced to achieve the highest coding efficiency with the cost of very high computatio...

High Efficient video coding (HEVC) will be replacing the current standard, H.264/MPEG-4 Advanced Video Coding (AVC). The main goal for HEVC standardization is to deliver equal video quality for half the bit-rate of H.264/MPEG-4 AVC. Other objective of HEVC is to support higher resolution than the current high definition (HD) of 1920 × 1080. Nevertheless, HEVC standard has similar structure desi...

a School of Computer and Software, Jiangsu Engineering Center of Network Monitoring, Nanjing University of Information Science and Technology, Nanjing 210044, China b School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China c Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China Department of Computer Science, City Univers...