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Rate-Distortion Analysis and Streaming of SP and SI Frames Eric Setton and Bernd Girod CSVT, 2006.

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Presentation on theme: "Rate-Distortion Analysis and Streaming of SP and SI Frames Eric Setton and Bernd Girod CSVT, 2006."— Presentation transcript:

1 Rate-Distortion Analysis and Streaming of SP and SI Frames Eric Setton and Bernd Girod CSVT, 2006

2 Outline Introduction RD Analysis of SP and SI Frames Rate-Distortion Performance Optimal Setting for Streaming Performance Analysis

3 Introduction SP/SI frame –Part of H.264 Ext Profile. –Reconstructed without drift by using different predictors. Drift-free bitstream switching. PP SP PP SP 1 P SI P SP 2 P SP 12 Bitstream 1 Bitstream 2 P Primary SPSecondary SP 12 3 MV 12 Reference frame Current frame http://vc.cs.nthu.edu.tw/home/paper/codfiles/cycho/200402181718/The_SP-_and_SI- Frames_Design_for_H.264_AVC.ppthttp://vc.cs.nthu.edu.tw/home/paper/codfiles/cycho/200402181718/The_SP-_and_SI- Frames_Design_for_H.264_AVC.ppt by CYCho

4 RD Analysis of SP and SI Frames (1) RD function of an ideal video encoder – –Y. Wang, J. Ostermann, and Y.-Q. Zhang, Video Processing And Communications. Prentice Hall, 2002, pp.233-234. Power spectral density (PSD) of zero-mean Gaussian signal a. Intermediate parameter Spatial frequency Input zero-mean Gaussian signal

5 RD Analysis of SP and SI Frames (2) RD analysis of primary SP pictures  Rate  Distortion Assumptions   D SP1 = D 1 + D 2  (at high rates) D1D1 D2D2

6 RD Analysis of SP and SI Frames (3) RD analysis of SI and secondary SP pictures  Rate  Distortion 33  3 >  1 if switching up  3 <  1 if switching down

7 Rate-Distortion Performance Theoretical vs. experimental RD performance  2 = 0.9  1,  3 = 1.2  1 for switching up, and  3 = 0.5  1 for switching down. QCIF, Foreman, 30fps SP ≒ 1.9P SI ≒ 1.35I

8 Optimal Setting for Streaming (1) Minimize s.t. Minimize s.t. PP SP P SI P x : The probability of transmitting an SI frame D : The distortion of rest stream At high rates, Solution:  D = D SP1 = D 1 + D 2

9 Optimal Setting for Streaming (2) = = 1. 2. 3. 5. 4.

10 Performance Analysis SP BBBPBBBPBBBPBBB I BBBPBBBPBBBPBBB I SI BBBPBBBPBBBPBBB

11 Streaming of SP and SI Pictures http://vc.cs.nthu.edu.tw/home/paper/co dfiles/cycho/200507272027/Video_strea ming_with_SP_and_SI_frames.ppthttp://vc.cs.nthu.edu.tw/home/paper/co dfiles/cycho/200507272027/Video_strea ming_with_SP_and_SI_frames.ppt

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