1. Constant Quality Constrained Rate Allocation for FGS-Coded Video Xi Min Zhang, Student Member, IEEE, Anthony Vetro, Member, IEEE, Yun Q. Shi, Senior Member, IEEE, and Huifang Sun, Fellow, IEEE IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 13, NO. 2, FEBRUARY 2003

2. Outline  Introduction  Background of optimal rate allocation  R-D extraction of FGS coded video  Constant quality rate allocation  for single FGS source  for multiple FGS source  Experimental Results  Concluding Remarks

3. Introduction IPPPPPP E4 E3 E2 E1 E4 E3 E2 E1 E4 E3 E2 E1 E4 E3 E2 E1 E4 E3 E2 E1 E4 E3 E2 E1 E4 E3 E2 E1 FGS encoded video base layer enhancement layer

4. Introduction(2) Goal ： achieve constant quality minimize the overall distortion at the same time

5. Background of optimal rate allocation λ ： lagrngian multiplier minimize the cost function J(λ) minimize the variation in quality

6. R-D extraction of FGS coded video R-D extraction for enhancement layer (a)Spatial domain(b)DCT domain

7. R-D extraction of FGS coded video(2) piecewise-linear model ： piecewise-exponential model ：

8. Constant quality rate allocation rate allocation rate allocation by sliding-window

9. Constant quality rate allocation(2)  sliding window approach for multiple FGS source

10. Constant quality rate allocation(3)  sliding window approach for multiple FGS source

11. Experimental Results

12. Experimental Results(2)

13. Experimental Results(3)

14. Concluding Remarks  An R-D labeling scheme was proposed  The sliding-window-based rate-allocation method