| Paper: | WP-P6.8 |
| Session: | Image Coding IV |
| Time: | Wednesday, September 19, 14:30 - 17:10 |
| Presentation: |
Poster
|
| Title: |
CODING GAIN AND TUNING FOR PARAMETERIZED VISUAL QUALITY METRICS |
| Authors: |
Stijn de Waele; Philips Electronics | | |
| | Michael Verberne; Philips Electronics | | |
| Abstract: |
A visual quality metric for video provides a mathematical expression for visual quality. We show how the coding gain of rate-distortion optimal (RDopt) encoding of the quantizer step size depends on the exact shape of this expression. For the Mean Square Error, we find a small coding gain (1% on average) compared to using a constant quantizer. However, we do find a significant gain for the Structural Similarity (SSIM) (12% on average). Finally, we show parameter tuning using the new Perceptually Weighted Error (PWE). The tuning results in a parameter setting of PWE that offers the best visual quality of RDopt encoding. |
