NDLI: A ROI quality adjustable rate control scheme for low bitrate video coding

Content Provider	IEEE Xplore Digital Library
Author	Ling Yang Li Zhang Siwei Ma Debin Zhao
Copyright Year	2009
Description	Author affiliation: Department of Computer Science and Engineering, Harbin Institute of Technology, China (Debin Zhao) \|\| Key Lab of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China (Li Zhang) \|\| Graduate University, Chinese Academy of Sciences, Beijing, China (Ling Yang) \|\| Institute of Digital Media, School of Electronic Engineering and Computer Science, Peking University, Beijing, China (Siwei Ma)
Abstract	This paper proposed a novel Region of Interest (ROI) based rate control algorithm for video communication systems, in which the subjective quality of ROI can be adjusted according to users' requirements. In the proposed scheme, in order to analyze the relationship between subjective quality and encoding parameters, a Structural Similarity Index Map — quantization parameter (SSIM-QP) model is established. Through this relation, the possible visual quality range of ROI is defined according to the range of ROI QP, which is predicted by rate control algorithm. Then, with interest levels being identified within the visual quality range, resources allocated to ROI is determined. Finally, considering both the quality of ROI and the entire frame, resource allocation is slightly adjusted. Experimental results demonstrate that the subjective visual quality of ROI in our proposed scheme can be adjustable improved compared to the existing rate control algorithms.
Starting Page	1
Ending Page	4
File Size	486570
Page Count	4
File Format	PDF
ISBN	9781424445936
DOI	10.1109/PCS.2009.5167372
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-05-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Video coding PSNR SSIM Humans Quantization Quadratic programming Data mining Videoconference Computer science Bit rate region of interest rate control Resource management
Content Type	Text
Resource Type	Article

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