Name
Abstract | ||
|---|---|---|
This paper addresses the problem of adapting overlapped block motion compensation (OBMC) windows for use with variable blocksize motion estimates. We tackle the problem by using a parametric window design, which expresses, based on a statistical motion model, the optimal weights as a function of the distances between the predicted pixel and its nearby block centers. The formula enables both prediction weights and prediction order to be adapted on a pixelbypixel basis. Extensive experiments have been conducted using JM 12.4. Compared with conventional block motion compensation, our scheme shows a bitrate saving of 18% (5% on average) while maintaining the same or even higher PSNR (0.1 dB). It also provides a competitive advantage to variable block size motion compensation. Additionally, a hybrid of the two techniques achieves a further bitrate reduction of 13%. The result, nevertheless, provides only a lower bound on what is achievable since both motion estimation and mode decision were accomplished without considering OBMC. Further improvement is expected by incorporating iterative methods. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1109/MMSP.2009.5293287 | MMSP |
Keywords | Field | DocType |
variable block size motion estimates,motion compensation,parametric window design,motion estimation,overlapped block motion compensation,statistical motion model,iterative methods,correlation,lower bound,psnr,encoding,competitive advantage,iteration method,pixel | Block size,Quarter-pixel motion,Computer science,Upper and lower bounds,Iterative method,Control theory,Motion compensation,Parametric statistics,Pixel,Motion estimation | Conference |
ISSN | ISBN | Citations |
2163-3517 | 978-1-4244-4464-9 | 2 |
PageRank | References | Authors |
0.54 | 3 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yi-Wen Chen | 1 | 119 | 6.80 |
| Tse-Wei Wang | 2 | 18 | 2.86 |
| Yu-Chen Tseng | 3 | 7 | 1.46 |
| Wen-Hsiao Peng | 4 | 209 | 33.15 |
| Suh-Yin Lee | 5 | 1596 | 319.67 |