1 / 22

Statistical Characteristics of Simple Wyner-Ziv Frames

Statistical Characteristics of Simple Wyner-Ziv Frames. Jin-soo KIM. Contents. Simple Stat. Char.s of Wyner-Ziv Frames Statistical Characteristics of Simple Frame Difference DCT Coefficients for Simple Frame Difference Spatial Reduction for WZ Encoder

yamka
Télécharger la présentation

Statistical Characteristics of Simple Wyner-Ziv Frames

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Statistical Characteristics of Simple Wyner-Ziv Frames Jin-soo KIM

  2. Contents • Simple Stat. Char.s of Wyner-Ziv Frames • Statistical Characteristics of Simple Frame Difference • DCT Coefficients for Simple Frame Difference • Spatial Reduction for WZ Encoder • Spatial Reduction and DCT for WZ Encoder • Research Plan • Q&A

  3. Statistical Characteristics of Simple Frame Difference

  4. Simple Frame Difference for WZ frames I wz I wz I wz I 1 2 3 4 Encoder Side I wz I Recon. Residual signal WZ Encoder Residual signal - Encoded bit stream = Side Information MCFI WZ Decoder 1 2 3 Decoder Side [Aaron, Zhang, Girod, Asilomar 2002]

  5. Frame Difference for Simple WZ wz I wz I wz I I Residual signal

  6. Statistical Distribution Luma

  7. Standard Deviations for Simple FD 300 Frames @ CIF, 30Hz Foreman: Luma's STD = 16.5, Chroma's STD = 3.4, Y/C entropy=5.2, 1.9bits/pel Coastguard: Luma's STD = 16.4, Chroma's STD = 1.6, Y/C entropy=5.7, 1.6bits/pel Stefan: Luma's STD = 35.6, Chroma's STD = 7.4, Y/C entropy=6.2, 2.7bits/pel Akiyo: Luma's STD = 2.8, Chroma's STD = 0.6, Y/C entropy=1.69, 1.0bits/pel

  8. DCT Coefficients for Simple Frame Difference

  9. Frame Difference for Simple WZ I wz I wz I wz I Residual signal wz 8x8 DCT [Aaron, Zhang, Girod, Asilomar 2003]

  10. Std Dev of DCT Coeff For Simple FD Std. dev. DCT coeff. in zig-zag scan order

  11. Spatial Reduction for WZ Encoder

  12. Blk Diagram for Spatial Reduction WZ Enc. Rec. Frame store (Key frames) 2:1 decimation LR bit stream Current frame (WZ frame) Regular Frame Coder (ex. H.264) 2:1 decimation 2:1 interpolation - + + Residual signal

  13. Block Diagram for Simulation - = Residual signal LPF & 2:1 decimation 2:1 interploation & LPF Integer Quant

  14. Std Dev for Residual Signal 300 Frames @ CIF, 30Hz Foreman: Luma's STD = 16.5, Chroma's STD = 3.4, Y/C entropy=5.2, 1.9bits/pel Foreman: Luma's STD = 9.1, Chroma's STD = 1.0, Y/C entropy=3.8, 0.5bits/pel Coastguard: Luma's STD = 16.4, Chroma's STD = 1.6, Y/C entropy=5.7, 1.6bits/pel Coastguard: Luma's STD = 10.4, Chroma's STD = 1.6, Y/C entropy=4.8, 1.0bits/pel Stefan: Luma's STD var = 35.6, Chroma's STD = 7.4, Y/C entropy=6.2, 2.7bits/pel Stefan: Luma's STD = 12.1, Chroma's STD = 1.0, Y/C entropy=4.7, 0.5bits/pel

  15. Spatial Reduction and DCT for WZ Encoder

  16. Spatial Reduction and DCT for WZ Enc. Rec. Frame store 2:1 decimation LR bit stream Current frame Regular Frame Coder (ex. H.264) 2:1 decimation 2:1 interpolation - + + Residual signal DCT [HP report by Mukherjee, Machiavello, Queiroz, 2007]

  17. Std Dev of DCT Coeff For Spatial Reduction Std. dev. DCT coeff. in zig-zag scan order

  18. Comparison of DCT and DCT+Spatial Reduction Std. dev. DCT coeff. in zig-zag scan order

  19. Conclusion • Need to find an efficient statistical model for the residual signal • Need to look for entropy coding based on the trade-off between computational complexity and R-D performance • Need to implement the channel encoding/decoding algorithm • Need to develop an effective reconstruction scheme for side information

  20. Research Plan (with M.S. Vidhya Murthy)

  21. Research Plan Plan ■ Planand achievements done Now

  22. Q&A Thank you

More Related