An SSIM-motivated LCU-level rate control algorithm for HEVC
Authors:
- 1 December 2013
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 85-88
Abstract
The rate control model used in the HEVC reference software HM10.0 is a R-λ model. In this model the distortion is measured by Mean Squared Error (MSE) and Sum of Absolute Difference(SAD). However, MSE and SAD are not correlated well with perceptual image quality. In this paper, we propose an improved LCU-level rate control algorithm based on the structural similarity (SSIM) index which was proved to be a better indicator of perceived image quality than MSE. What's more, we use the the structural similarity index to decide the weight of LCU-level bit allocation in the R-λ model and incorporate it to the rate-distortion optimization. Experiments show that the proposed scheme can achieve significant gain in terms of rate-SSIM performance and better subjective quality when compared with HEVC.Keywords
This publication has 5 references indexed in Scilit:
- Iterative Rate-Distortion Optimization of H.264 With Constant Bit Rate ConstraintIEEE Transactions on Image Processing, 2008
- Rate-Distortion Optimization of Rate Control for H.264 With Adaptive Initial Quantization Parameter DeterminationIEEE Transactions on Circuits and Systems for Video Technology, 2008
- A Novel Rate Control Scheme for Low Delay Video Communication of H.264/AVC StandardIEEE Transactions on Circuits and Systems for Video Technology, 2006
- Image quality assessment: from error visibility to structural similarityIEEE Transactions on Image Processing, 2004
- Rate control in DCT video coding for low-delay communicationsIEEE Transactions on Circuits and Systems for Video Technology, 1999