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Rate control scheme plays a vital role in the circumstances of region-of-interest (ROI) based video coding, aiming to allocate a higher bit rate to the ROI while setting a relative lower bit rate ratio in non-ROI to maintain the total bit rate close to the assigned target value. Among various rate control models, the R-Lambda based rate control model outperforming other models. Unfortunately, the...
This paper presents a review of parametric models for video quality estimation standardized in the past few years. The focus of this paper is the estimation of quality degradation caused by the compression artifacts. The models introduced in the paper contain the work of Telecommunication Standardization Section of the International Telecommunication Union (ITU-T) Study Group 9 and Study Group 12,...
Recently, parametric models of predicting video subjective quality by exploiting packet layer or bit stream layer information at decoder side has achieved significant progress. In contrast, there are few works on estimating subjective quality in the stage of video encoding, partially because of limited and outdated dataset. In this paper, we contribute a new 4K video dataset with full subjective scores...
Subjective evaluation conducted by JCT-VC (Joint Collaborative Team on Video Coding) members shows that H.265/HEVC achieves about 50% rate saving over H.264/AVC without sacrificing subjective quality. In this paper, we study 13 objective image and video quality assessment (IQA/VQA) metrics, including the recently proposed ones — FSIM [1], GMSD [2] and IWSSIM [3], in terms of coding gain prediction...
This short paper presents a set of 15 new 4K resolution ultra-high definition (UHD) video sequences for catering the requirement of active UHD video quality assessment algorithms in coming years, as well as help to fully evaluate coding efficiency of latest HEVC (High Efficient Video Coding). The details of processing procedures and sequences characteristics are illustrated.
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