NDLI: An improved distortion model for rate control of DCT-based video coding

Content Provider	IEEE Xplore Digital Library
Author	Jun Xie Liang-Tien Chia Bu-Sung Lee
Copyright Year	2006
Description	Author affiliation: Sch. of Comput. Eng., Nanyang Technol. Univ., Singapore (Jun Xie; Liang-Tien Chia; Bu-Sung Lee)
Abstract	This paper presents a rate control algorithm for the dominant discrete cosine transform (DCT)-based video coding. It is developed based on a more accurate rate-distortion (R-D) model, specifically, a new distortion-quantization (D-Q) model. Different from previous work that employs a uniform D-Q model or an empirical distortion model, our work proposes an accurate distortion model, which can quantitatively describe the relationship of distortion with respect to video source information and the selected quantization resolution. Based on understanding the distribution of source frequency coefficients and the quantization theory, our distortion model is proposed. This distortion model is combined with the classical R-D theory to generate a new rate model. Finally, the proposed model is implemented on an MPEG-4 encoder to perform rate control for a low-delay visual communication system. We also compare the proposed rate control with the VM18 rate control and it has been shown to be more efficient
File Size	2327159
File Format	PDF
ISBN	1424400287
DOI	10.1109/MMMC.2006.1651306
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-01-04
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rate distortion theory Video coding Discrete cosine transforms Quantization Frequency Communication system control Quadratic programming Rate-distortion Video compression Computer networks
Content Type	Text
Resource Type	Article

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