NDLI: Estimating the value of θ in the intra frame for ρ-domain rate control algorithms

Content Provider	IEEE Xplore Digital Library
Author	Zhihang Wang Shengfu Dong Long Xu Wen Gao Qingming Huang
Copyright Year	2009
Description	Author affiliation: Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China (Zhihang Wang; Long Xu; Wen Gao) \|\| Graduate School, Chinese Academy of Sciences, Beijing, 100039, China (Qingming Huang) \|\| Institute of Digital Media, Peking University, Beijing 1000871, China (Shengfu Dong)
Abstract	The ρ-domain rate control algorithm is very simple and effective. There is only one parameter, θ, used in the model. θ reflects the relationship between the rate and the quantization step. Accurately estimating the θ value of the I (intra) frame is important for an efficient ρ-domain rate control algorithm because the I frame will influence the remaining frames in the GOP (group of pictures) greatly. In this paper, we propose to estimate the θ value based on the energy of the frame. The energy difference of the I frames is used to predict the new θ. A linear relationship between θ and the energy is deduced. Experimental results show that using the energy can more accurately predict the θ value of I frame than only using the θ value of the previous P (predict) frame.
Starting Page	1
Ending Page	4
File Size	118575
Page Count	4
File Format	PDF
ISBN	9781424445936
DOI	10.1109/PCS.2009.5167404
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	Computers Video coding Video sequences ρ-domain Quantization Helium θ Estimation Bit rate Layout Rate-distortion Rate Control Robustness Entropy coding
Content Type	Text
Resource Type	Article

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