Laplacian distortion model (LDM) for rate control in video coding

Authors:
Long Xu;Xiangyang Ji;Wen Gao;Debin Zhao
Affiliations:
Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China;Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China;Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China;Department of Computer Science and Technology, Harbin Institute of Technology, Harbin, China
Venue:
PCM'07 Proceedings of the multimedia 8th Pacific Rim conference on Advances in multimedia information processing
Year:
2007

Citing 4
Cited 0

Quantization

IEEE Transactions on Information Theory
A new rate control scheme using quadratic rate distortion model

IEEE Transactions on Circuits and Systems for Video Technology
Rate control in DCT video coding for low-delay communications

IEEE Transactions on Circuits and Systems for Video Technology
Modified TMN8 rate control for low-delay video communications

IEEE Transactions on Circuits and Systems for Video Technology

Quantified Score

Hi-index	0.00

Visualization

Abstract

In many rate control models, a uniform weighted distortion has been assumed; that is, the DCT coefficients of the motioncompensation difference frames (residues) conform to a uniform distribution. However, the residue after transform does not conform to a uniform distribution but approximate to a Laplacian distribution. In this paper, we first deduce a new distortion model with the assumption of Laplacian distribution of quantized DCT coefficients (called Laplacian distortion model, LDM), and then a more accurate rate-distortion model is proposed based on LDM. Experimental results on H.264/AVC show that our proposed method can improve PSNR up to 0.8dB compared to that of traditional TMN8; meanwhile, the mismatch of target bit rate and actual bit rate generated for coding can be controlled below 2.5%.