NDLI: Region-classification-based rate control for flicker suppression of I-frames in HEVC

Content Provider	IEEE Xplore Digital Library
Author	Peng Wang Yongfei Zhang Hai-Miao Hu Bo Li
Copyright Year	2013
Description	Author affiliation: Beijing Key Lab. of Digital Media, Beihang Univ., Beijing, China (Peng Wang; Yongfei Zhang; Hai-Miao Hu; Bo Li)
Abstract	In High Efficiency Video Coding (HEVC), the coding efficiency of I-frames is lower than P-frames and B-frames, which will cause the flicker artifact, especially in low bitrates applications. We propose a region-classification-based rate control for Coding Tree Units (CTUs) in I-frames to improve the reconstructed quality of I-frames to suppress the flicker artifact. The CTUs in I-frame are classified into three regions according to their motion vectors and complexity. When the bit budget of one I-frame is used up, the target bitrates for the remaining CTUs will be adjusted according to the regions they belong to, and the pixel-based unified rate-quantization (URQ) model is then used to calculate the QPs. Experimental results demonstrate that the proposed scheme can efficiently suppress the flicker artifacts and improve both the subjective and objective video quality when compared with the original scheme in HM9.0.
Starting Page	1986
Ending Page	1990
File Size	329023
Page Count	5
File Format	PDF
ISBN	9781479923410
DOI	10.1109/ICIP.2013.6738409
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-15
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	region-classification HEVC flicker suppression Coding Tree Unit rate control
Content Type	Text
Resource Type	Article

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