Name
Abstract | ||
|---|---|---|
In this paper, we present a method for performing rate-distortion optimization (RDO) using a perceptual visual quality metric, the structural similarity index (SSIM), as the target of optimization. Rate-distortion optimization is widely used in modern video codecs to make various encoder decisions to optimize the rate-distortion tradeoff. Typically, the distortion measure used is either sum-of-square error or sum-of-absolute distance, both of which are convenient when used in the RDO framework but not always reflective of a perceptual visual quality. We show that SSIM can be used as the distortion metric in the RDO framework in a simple, yet effective, manner by scaling the Lagrange multiplier used in RDO based on the local variance in that region. The experimental results on the H.264/AVC reference software show that compared to traditional RDO approaches, for the same SSIM score, the proposed approach can achieve an average rate reduction of about 9% and 14% for random access and low-delay encoding configurations. At the same time, there is no significant change in the encoding runtime. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/TCSVT.2013.2240918 | IEEE Transactions on Circuits and Systems for Video Technology |
Keywords | DocType | Volume |
optimisation,sum-of-square error,rate distortion optimization,structural similarity index (ssim),structural similarity index,random processes,perceptual quality,rdo framework,delay encoding configuration,h.264,perceptual-based coding,perceptual visual quality metric,ssim,rate-distortion optimization (rdo),low-delay encoding configurations,distortion metric,sum-of-absolute distance,random access,video coding,avc,lagrange multiplier scaling,modern video codecs,perceptual based coding,distortion measure,rdo,sad,adaptive codes,sse,error statistics,rate distortion theory,lagrange multiplier,video codecs,optimization,measurement,psnr,encoding | Conference | 23 |
Issue | ISSN | ISBN |
7 | 1051-8215 | 978-1-4673-0044-5 |
Citations | PageRank | References |
19 | 0.74 | 23 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Chuohao Yeo | 1 | 692 | 42.48 |
| Hui Li Tan | 2 | 76 | 7.42 |
| Yih Han Tan | 3 | 140 | 13.87 |